[INFO] updating cached repository brianmacdonald/lodestone
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/brianmacdonald/lodestone
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/brianmacdonald/lodestone" "work/ex/clippy-test-run/sources/stable/gh/brianmacdonald/lodestone"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/brianmacdonald/lodestone'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/brianmacdonald/lodestone" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/brianmacdonald/lodestone"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/brianmacdonald/lodestone'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 94e2a10695d072fc561a8d36421a31eff05552c1
[INFO] sha for GitHub repo brianmacdonald/lodestone: 94e2a10695d072fc561a8d36421a31eff05552c1
[INFO] validating manifest of brianmacdonald/lodestone on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of brianmacdonald/lodestone on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing brianmacdonald/lodestone
[INFO] finished frobbing brianmacdonald/lodestone
[INFO] frobbed toml for brianmacdonald/lodestone written to work/ex/clippy-test-run/sources/stable/gh/brianmacdonald/lodestone/Cargo.toml
[INFO] started frobbing brianmacdonald/lodestone
[INFO] finished frobbing brianmacdonald/lodestone
[INFO] frobbed toml for brianmacdonald/lodestone written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/brianmacdonald/lodestone/Cargo.toml
[INFO] crate brianmacdonald/lodestone has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting brianmacdonald/lodestone against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/brianmacdonald/lodestone:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0485833c0715d4f57c76c0ffd0c84fd0cc20ffba31838656172296024f015060
[INFO] running `"docker" "start" "-a" "0485833c0715d4f57c76c0ffd0c84fd0cc20ffba31838656172296024f015060"`
[INFO] [stderr]     Checking lodestone v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lexer.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |             input: input,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/evaluator.rs:128:72
[INFO] [stderr]     |
[INFO] [stderr] 128 |                     return ObjectKind::Function{slots: HashMap::new(), parameters: parameters, body: *body, env: env.clone()};
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `parameters`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/evaluator.rs:157:71
[INFO] [stderr]     |
[INFO] [stderr] 157 |                     return ObjectKind::Integer{slots: HashMap::new(), value: value};
[INFO] [stderr]     |                                                                       ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/parser.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             lexer: lexer,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `lexer`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:53
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:67
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                                   ^^^^^^^^^^ help: replace it with: `name`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:79
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                                               ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:254:56
[INFO] [stderr]     |
[INFO] [stderr] 254 |         Some(Box::new(StatementKind::ReturnStatement { token: token, return_value: Some(Box::new(es)) } ))
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:263:59
[INFO] [stderr]     |
[INFO] [stderr] 263 |         Some(Box::new(StatementKind::ExpressionStatement{ token: token, expression: expression } ))
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:263:73
[INFO] [stderr]     |
[INFO] [stderr] 263 |         Some(Box::new(StatementKind::ExpressionStatement{ token: token, expression: expression } ))
[INFO] [stderr]     |                                                                         ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `expression`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:58
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:72
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^ help: replace it with: `operator`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:92
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:320:74
[INFO] [stderr]     |
[INFO] [stderr] 320 |         Some(Box::new(ExpressionKind::IntegerLiteral { token: cur_token, value: value }))
[INFO] [stderr]     |                                                                          ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:75
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^^ help: replace it with: `operator`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:95
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                                               ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:107
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                                                           ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:72
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `condition`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:94
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `consequence`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:120
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `alternative`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:419:73
[INFO] [stderr]     |
[INFO] [stderr] 419 |         Some(Box::new(StatementKind::BlockStatement { token: cur_token, statements: statements}))
[INFO] [stderr]     |                                                                         ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `statements`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:434:83
[INFO] [stderr]     |
[INFO] [stderr] 434 |                 Some(Box::new(ExpressionKind::FunctionLiteral { token: cur_token, parameters: parameters, body: b }))
[INFO] [stderr]     |                                                                                   ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `parameters`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:542:75
[INFO] [stderr]     |
[INFO] [stderr] 542 |         Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: left, index: index } ))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:542:87
[INFO] [stderr]     |
[INFO] [stderr] 542 |         Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: left, index: index } ))
[INFO] [stderr]     |                                                                                       ^^^^^^^^^^^^ help: replace it with: `index`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:578:99
[INFO] [stderr]     |
[INFO] [stderr] 578 |                 return Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }));
[INFO] [stderr]     |                                                                                                   ^^^^^^^^^^^^ help: replace it with: `index`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/object.rs:82:33
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 write!(f, "{}", "Null")
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/object.rs:88:33
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 write!(f, "{}", "display not implmented")
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lexer.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |             input: input,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `input`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/evaluator.rs:128:72
[INFO] [stderr]     |
[INFO] [stderr] 128 |                     return ObjectKind::Function{slots: HashMap::new(), parameters: parameters, body: *body, env: env.clone()};
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `parameters`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/evaluator.rs:157:71
[INFO] [stderr]     |
[INFO] [stderr] 157 |                     return ObjectKind::Integer{slots: HashMap::new(), value: value};
[INFO] [stderr]     |                                                                       ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/parser.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             lexer: lexer,
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `lexer`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:53
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:67
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                                   ^^^^^^^^^^ help: replace it with: `name`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:243:79
[INFO] [stderr]     |
[INFO] [stderr] 243 |         Some(Box::new(StatementKind::LetStatement { token: token, name: name, value: value }))
[INFO] [stderr]     |                                                                               ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:254:56
[INFO] [stderr]     |
[INFO] [stderr] 254 |         Some(Box::new(StatementKind::ReturnStatement { token: token, return_value: Some(Box::new(es)) } ))
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:263:59
[INFO] [stderr]     |
[INFO] [stderr] 263 |         Some(Box::new(StatementKind::ExpressionStatement{ token: token, expression: expression } ))
[INFO] [stderr]     |                                                           ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:263:73
[INFO] [stderr]     |
[INFO] [stderr] 263 |         Some(Box::new(StatementKind::ExpressionStatement{ token: token, expression: expression } ))
[INFO] [stderr]     |                                                                         ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `expression`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:58
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^ help: replace it with: `token`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:72
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^ help: replace it with: `operator`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:271:92
[INFO] [stderr]     |
[INFO] [stderr] 271 |         Some(Box::new(ExpressionKind::PrefixExpression { token: token, operator: operator, right: right}))
[INFO] [stderr]     |                                                                                            ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:320:74
[INFO] [stderr]     |
[INFO] [stderr] 320 |         Some(Box::new(ExpressionKind::IntegerLiteral { token: cur_token, value: value }))
[INFO] [stderr]     |                                                                          ^^^^^^^^^^^^ help: replace it with: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:75
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^^^^^^^^^ help: replace it with: `operator`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:95
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                                               ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:363:107
[INFO] [stderr]     |
[INFO] [stderr] 363 |         Some(Box::new(ExpressionKind::InfixExpression { token: cur_token, operator: operator, left: left, right: right }))
[INFO] [stderr]     |                                                                                                           ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:72
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                        ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `condition`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:94
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                                              ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `consequence`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:402:120
[INFO] [stderr]     |
[INFO] [stderr] 402 |         Some(Box::new(ExpressionKind::IfExpression { token: cur_token, condition: condition, consequence: consequence, alternative: alternative } ))
[INFO] [stderr]     |                                                                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `alternative`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:419:73
[INFO] [stderr]     |
[INFO] [stderr] 419 |         Some(Box::new(StatementKind::BlockStatement { token: cur_token, statements: statements}))
[INFO] [stderr]     |                                                                         ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `statements`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:434:83
[INFO] [stderr]     |
[INFO] [stderr] 434 |                 Some(Box::new(ExpressionKind::FunctionLiteral { token: cur_token, parameters: parameters, body: b }))
[INFO] [stderr]     |                                                                                   ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `parameters`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:542:75
[INFO] [stderr]     |
[INFO] [stderr] 542 |         Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: left, index: index } ))
[INFO] [stderr]     |                                                                           ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:542:87
[INFO] [stderr]     |
[INFO] [stderr] 542 |         Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: left, index: index } ))
[INFO] [stderr]     |                                                                                       ^^^^^^^^^^^^ help: replace it with: `index`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/parser.rs:578:99
[INFO] [stderr]     |
[INFO] [stderr] 578 |                 return Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }));
[INFO] [stderr]     |                                                                                                   ^^^^^^^^^^^^ help: replace it with: `index`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/object.rs:82:33
[INFO] [stderr]    |
[INFO] [stderr] 82 |                 write!(f, "{}", "Null")
[INFO] [stderr]    |                                 ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/object.rs:88:33
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 write!(f, "{}", "display not implmented")
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         return l;
[INFO] [stderr]    |         ^^^^^^^^^ help: remove `return` as shown: `l`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:181:13
[INFO] [stderr]     |
[INFO] [stderr] 181 |             return 0 as char;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `0 as char`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:183:13
[INFO] [stderr]     |
[INFO] [stderr] 183 |             return self.input.chars().nth(self.read_position as usize).unwrap() as char;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.input.chars().nth(self.read_position as usize).unwrap() as char`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 | /         return self.input
[INFO] [stderr] 198 | |             .chars()
[INFO] [stderr] 199 | |             .skip(position as usize)
[INFO] [stderr] 200 | |             .take(take_size as usize)
[INFO] [stderr] 201 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 197 |         self.input
[INFO] [stderr] 198 |             .chars()
[INFO] [stderr] 199 |             .skip(position as usize)
[INFO] [stderr] 200 |             .take(take_size as usize)
[INFO] [stderr] 201 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:215:9
[INFO] [stderr]     |
[INFO] [stderr] 215 | /         return self.input
[INFO] [stderr] 216 | |             .chars()
[INFO] [stderr] 217 | |             .skip(position as usize)
[INFO] [stderr] 218 | |             .take(take_size as usize)
[INFO] [stderr] 219 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 215 |         self.input
[INFO] [stderr] 216 |             .chars()
[INFO] [stderr] 217 |             .skip(position as usize)
[INFO] [stderr] 218 |             .take(take_size as usize)
[INFO] [stderr] 219 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:233:9
[INFO] [stderr]     |
[INFO] [stderr] 233 | /         return self.input
[INFO] [stderr] 234 | |             .chars()
[INFO] [stderr] 235 | |             .skip(position as usize)
[INFO] [stderr] 236 | |             .take(take_size as usize)
[INFO] [stderr] 237 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 233 |         self.input
[INFO] [stderr] 234 |             .chars()
[INFO] [stderr] 235 |             .skip(position as usize)
[INFO] [stderr] 236 |             .take(take_size as usize)
[INFO] [stderr] 237 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 | /     return token::Token {
[INFO] [stderr] 244 | |         t_type: token_type,
[INFO] [stderr] 245 | |         literal: ch.to_string(),
[INFO] [stderr] 246 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 243 |     token::Token {
[INFO] [stderr] 244 |         t_type: token_type,
[INFO] [stderr] 245 |         literal: ch.to_string(),
[INFO] [stderr] 246 |     }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_';
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:255:5
[INFO] [stderr]     |
[INFO] [stderr] 255 |     return '0' <= ch && ch <= '9';
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `'0' <= ch && ch <= '9'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ast.rs:287:25
[INFO] [stderr]     |
[INFO] [stderr] 287 |                         return x.string().clone();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `x.string().clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ast.rs:290:25
[INFO] [stderr]     |
[INFO] [stderr] 290 |                         return String::from("");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from("")`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:284:5
[INFO] [stderr]     |
[INFO] [stderr] 284 |     return result.clone();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `result.clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:392:5
[INFO] [stderr]     |
[INFO] [stderr] 392 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:427:2
[INFO] [stderr]     |
[INFO] [stderr] 427 |     return result;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:436:13
[INFO] [stderr]     |
[INFO] [stderr] 436 |             return unwrap_return_value(evaluated);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `unwrap_return_value(evaluated)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:461:5
[INFO] [stderr]     |
[INFO] [stderr] 461 |     return closure;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^ help: remove `return` as shown: `closure`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:467:13
[INFO] [stderr]     |
[INFO] [stderr] 467 |             return *value;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: remove `return` as shown: `*value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:470:13
[INFO] [stderr]     |
[INFO] [stderr] 470 |             return obj;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: remove `return` as shown: `obj`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         return parser;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `parser`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 return self.parse_prefix_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_prefix_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 return self.parse_prefix_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_prefix_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:49:17
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 return self.parser_integer_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parser_integer_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |                 return self.parse_identifier();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_identifier()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 return self.parse_boolean();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_boolean()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 return self.parse_boolean();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_boolean()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 return self.parse_grouped_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_grouped_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:64:17
[INFO] [stderr]    |
[INFO] [stderr] 64 |                 return self.parse_if_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_if_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 return self.parse_function_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_function_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:70:17
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 return self.parse_string_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_string_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:80:17
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 return self.parse_array_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_array_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:83:17
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 return None;
[INFO] [stderr]    |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:91:17
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 |                 return self.parse_infix_expression(expression);;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:100:17
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 return self.parse_infix_expression(expression);;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:103:17
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:106:17
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:109:17
[INFO] [stderr]     |
[INFO] [stderr] 109 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:115:17
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:118:17
[INFO] [stderr]     |
[INFO] [stderr] 118 |                 return self.parse_call_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_call_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:121:17
[INFO] [stderr]     |
[INFO] [stderr] 121 |                 return self.parse_index_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_index_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:124:17
[INFO] [stderr]     |
[INFO] [stderr] 124 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:135:17
[INFO] [stderr]     |
[INFO] [stderr] 135 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:141:17
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:144:17
[INFO] [stderr]     |
[INFO] [stderr] 144 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:156:17
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:159:17
[INFO] [stderr]     |
[INFO] [stderr] 159 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:162:17
[INFO] [stderr]     |
[INFO] [stderr] 162 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |                 return false;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |         return NodeKind::ProgramNode { statements: stmt_vec };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `NodeKind::ProgramNode { statements: stmt_vec }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:193:17
[INFO] [stderr]     |
[INFO] [stderr] 193 |                 return self.parse_let_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_let_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:196:17
[INFO] [stderr]     |
[INFO] [stderr] 196 |                 return self.parse_return_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_return_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:199:17
[INFO] [stderr]     |
[INFO] [stderr] 199 |                 return self.parse_expression_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_expression_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |             return true;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:225:13
[INFO] [stderr]     |
[INFO] [stderr] 225 |             return false;
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:295:17
[INFO] [stderr]     |
[INFO] [stderr] 295 |                 return left_exp;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `left_exp`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:301:17
[INFO] [stderr]     |
[INFO] [stderr] 301 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:377:9
[INFO] [stderr]     |
[INFO] [stderr] 377 |         return exp;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove `return` as shown: `exp`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:462:9
[INFO] [stderr]     |
[INFO] [stderr] 462 |         return identifiers;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `identifiers`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:578:17
[INFO] [stderr]     |
[INFO] [stderr] 578 |                 return Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:581:17
[INFO] [stderr]     |
[INFO] [stderr] 581 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::ast::NodeKind`
[INFO] [stderr]  --> src/object.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::ast::NodeKind;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         return l;
[INFO] [stderr]    |         ^^^^^^^^^ help: remove `return` as shown: `l`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:181:13
[INFO] [stderr]     |
[INFO] [stderr] 181 |             return 0 as char;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `0 as char`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:183:13
[INFO] [stderr]     |
[INFO] [stderr] 183 |             return self.input.chars().nth(self.read_position as usize).unwrap() as char;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.input.chars().nth(self.read_position as usize).unwrap() as char`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 | /         return self.input
[INFO] [stderr] 198 | |             .chars()
[INFO] [stderr] 199 | |             .skip(position as usize)
[INFO] [stderr] 200 | |             .take(take_size as usize)
[INFO] [stderr] 201 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 197 |         self.input
[INFO] [stderr] 198 |             .chars()
[INFO] [stderr] 199 |             .skip(position as usize)
[INFO] [stderr] 200 |             .take(take_size as usize)
[INFO] [stderr] 201 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:215:9
[INFO] [stderr]     |
[INFO] [stderr] 215 | /         return self.input
[INFO] [stderr] 216 | |             .chars()
[INFO] [stderr] 217 | |             .skip(position as usize)
[INFO] [stderr] 218 | |             .take(take_size as usize)
[INFO] [stderr] 219 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 215 |         self.input
[INFO] [stderr] 216 |             .chars()
[INFO] [stderr] 217 |             .skip(position as usize)
[INFO] [stderr] 218 |             .take(take_size as usize)
[INFO] [stderr] 219 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:233:9
[INFO] [stderr]     |
[INFO] [stderr] 233 | /         return self.input
[INFO] [stderr] 234 | |             .chars()
[INFO] [stderr] 235 | |             .skip(position as usize)
[INFO] [stderr] 236 | |             .take(take_size as usize)
[INFO] [stderr] 237 | |             .collect();
[INFO] [stderr]     | |_______________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 233 |         self.input
[INFO] [stderr] 234 |             .chars()
[INFO] [stderr] 235 |             .skip(position as usize)
[INFO] [stderr] 236 |             .take(take_size as usize)
[INFO] [stderr] 237 |             .collect()
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 | /     return token::Token {
[INFO] [stderr] 244 | |         t_type: token_type,
[INFO] [stderr] 245 | |         literal: ch.to_string(),
[INFO] [stderr] 246 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 243 |     token::Token {
[INFO] [stderr] 244 |         t_type: token_type,
[INFO] [stderr] 245 |         literal: ch.to_string(),
[INFO] [stderr] 246 |     }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_';
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lexer.rs:255:5
[INFO] [stderr]     |
[INFO] [stderr] 255 |     return '0' <= ch && ch <= '9';
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `'0' <= ch && ch <= '9'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ast.rs:287:25
[INFO] [stderr]     |
[INFO] [stderr] 287 |                         return x.string().clone();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `x.string().clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/ast.rs:290:25
[INFO] [stderr]     |
[INFO] [stderr] 290 |                         return String::from("");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `String::from("")`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:186:5
[INFO] [stderr]     |
[INFO] [stderr] 186 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:284:5
[INFO] [stderr]     |
[INFO] [stderr] 284 |     return result.clone();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `result.clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:392:5
[INFO] [stderr]     |
[INFO] [stderr] 392 |     return ObjectKind::Null;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `ObjectKind::Null`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:427:2
[INFO] [stderr]     |
[INFO] [stderr] 427 |     return result;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:436:13
[INFO] [stderr]     |
[INFO] [stderr] 436 |             return unwrap_return_value(evaluated);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `unwrap_return_value(evaluated)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:461:5
[INFO] [stderr]     |
[INFO] [stderr] 461 |     return closure;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^ help: remove `return` as shown: `closure`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:467:13
[INFO] [stderr]     |
[INFO] [stderr] 467 |             return *value;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: remove `return` as shown: `*value`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/evaluator.rs:470:13
[INFO] [stderr]     |
[INFO] [stderr] 470 |             return obj;
[INFO] [stderr]     |             ^^^^^^^^^^^ help: remove `return` as shown: `obj`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         return parser;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `parser`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |                 return self.parse_prefix_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_prefix_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 return self.parse_prefix_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_prefix_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:49:17
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 return self.parser_integer_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parser_integer_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:52:17
[INFO] [stderr]    |
[INFO] [stderr] 52 |                 return self.parse_identifier();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_identifier()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 return self.parse_boolean();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_boolean()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:58:17
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 return self.parse_boolean();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_boolean()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 return self.parse_grouped_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_grouped_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:64:17
[INFO] [stderr]    |
[INFO] [stderr] 64 |                 return self.parse_if_expression();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_if_expression()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 return self.parse_function_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_function_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:70:17
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 return self.parse_string_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_string_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:80:17
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 return self.parse_array_literal();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_array_literal()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:83:17
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 return None;
[INFO] [stderr]    |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:91:17
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/parser.rs:97:17
[INFO] [stderr]    |
[INFO] [stderr] 97 |                 return self.parse_infix_expression(expression);;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:100:17
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 return self.parse_infix_expression(expression);;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:103:17
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:106:17
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:109:17
[INFO] [stderr]     |
[INFO] [stderr] 109 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:115:17
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 return self.parse_infix_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_infix_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:118:17
[INFO] [stderr]     |
[INFO] [stderr] 118 |                 return self.parse_call_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_call_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:121:17
[INFO] [stderr]     |
[INFO] [stderr] 121 |                 return self.parse_index_expression(expression);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_index_expression(expression)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:124:17
[INFO] [stderr]     |
[INFO] [stderr] 124 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:135:17
[INFO] [stderr]     |
[INFO] [stderr] 135 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:138:17
[INFO] [stderr]     |
[INFO] [stderr] 138 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:141:17
[INFO] [stderr]     |
[INFO] [stderr] 141 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:144:17
[INFO] [stderr]     |
[INFO] [stderr] 144 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:156:17
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:159:17
[INFO] [stderr]     |
[INFO] [stderr] 159 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:162:17
[INFO] [stderr]     |
[INFO] [stderr] 162 |                 return true;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:165:17
[INFO] [stderr]     |
[INFO] [stderr] 165 |                 return false;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |         return NodeKind::ProgramNode { statements: stmt_vec };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `NodeKind::ProgramNode { statements: stmt_vec }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:193:17
[INFO] [stderr]     |
[INFO] [stderr] 193 |                 return self.parse_let_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_let_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:196:17
[INFO] [stderr]     |
[INFO] [stderr] 196 |                 return self.parse_return_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_return_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:199:17
[INFO] [stderr]     |
[INFO] [stderr] 199 |                 return self.parse_expression_statement();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.parse_expression_statement()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |             return true;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:225:13
[INFO] [stderr]     |
[INFO] [stderr] 225 |             return false;
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:295:17
[INFO] [stderr]     |
[INFO] [stderr] 295 |                 return left_exp;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `left_exp`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:301:17
[INFO] [stderr]     |
[INFO] [stderr] 301 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:377:9
[INFO] [stderr]     |
[INFO] [stderr] 377 |         return exp;
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove `return` as shown: `exp`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:462:9
[INFO] [stderr]     |
[INFO] [stderr] 462 |         return identifiers;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `identifiers`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:578:17
[INFO] [stderr]     |
[INFO] [stderr] 578 |                 return Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(Box::new(ExpressionKind::IndexExpression { token: cur_token, left: l, index: index }))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:581:17
[INFO] [stderr]     |
[INFO] [stderr] 581 |                 return None;
[INFO] [stderr]     |                 ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::ast::NodeKind`
[INFO] [stderr]  --> src/object.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::ast::NodeKind;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/evaluator.rs:499:5
[INFO] [stderr]     |
[INFO] [stderr] 499 |     panic!("Non-valid string input.");
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/evaluator.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 _ => {
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/evaluator.rs:164:9
[INFO] [stderr]     |
[INFO] [stderr] 164 |         _ => {
[INFO] [stderr]     |         ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/ast.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             _ => {
[INFO] [stderr]    |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:17:45
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 StatementKind::LetStatement{token, name, value} => {
[INFO] [stderr]    |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:27:68
[INFO] [stderr]    |
[INFO] [stderr] 27 |                                         ExpressionKind::Identifier{token, value: name_value} => {
[INFO] [stderr]    |                                                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:54:52
[INFO] [stderr]    |
[INFO] [stderr] 54 |                 StatementKind::ExpressionStatement{token, expression} => {
[INFO] [stderr]    |                                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:77:50
[INFO] [stderr]    |
[INFO] [stderr] 77 |                 ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                  ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:121:51
[INFO] [stderr]     |
[INFO] [stderr] 121 |                 ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]     |                                                   ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:127:49
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]     |                                                 ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:156:48
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]     |                                                ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slots`
[INFO] [stderr]    --> src/evaluator.rs:303:29
[INFO] [stderr]     |
[INFO] [stderr] 303 |         ObjectKind::Integer{slots, value} => {
[INFO] [stderr]     |                             ^^^^^ help: try ignoring the field: `slots: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/evaluator.rs:303:36
[INFO] [stderr]     |
[INFO] [stderr] 303 |         ObjectKind::Integer{slots, value} => {
[INFO] [stderr]     |                                    ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lslots`
[INFO] [stderr]    --> src/evaluator.rs:316:36
[INFO] [stderr]     |
[INFO] [stderr] 316 |         ObjectKind::Integer{slots: lslots, value: lvalue} => {
[INFO] [stderr]     |                                    ^^^^^^ help: consider using `_lslots` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rslots`
[INFO] [stderr]    --> src/evaluator.rs:318:44
[INFO] [stderr]     |
[INFO] [stderr] 318 |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr]     |                                            ^^^^^^ help: consider using `_rslots` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:360:38
[INFO] [stderr]     |
[INFO] [stderr] 360 |         ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]     |                                      ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:400:36
[INFO] [stderr]     |
[INFO] [stderr] 400 |         ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:449:40
[INFO] [stderr]     |
[INFO] [stderr] 449 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                        ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:68:47
[INFO] [stderr]    |
[INFO] [stderr] 68 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]    |                                               ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/ast.rs:71:53
[INFO] [stderr]    |
[INFO] [stderr] 71 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                     ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/ast.rs:71:63
[INFO] [stderr]    |
[INFO] [stderr] 71 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                               ^^^^^ help: try ignoring the field: `right: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/ast.rs:74:52
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                    ^^^^ help: try ignoring the field: `left: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/ast.rs:74:58
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                          ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/ast.rs:74:68
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                                    ^^^^^ help: try ignoring the field: `right: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]   --> src/ast.rs:77:49
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: try ignoring the field: `condition: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `consequence`
[INFO] [stderr]   --> src/ast.rs:77:60
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: try ignoring the field: `consequence: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `alternative`
[INFO] [stderr]   --> src/ast.rs:77:73
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^ help: try ignoring the field: `alternative: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:80:54
[INFO] [stderr]    |
[INFO] [stderr] 80 |             ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]    |                                                      ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parameters`
[INFO] [stderr]   --> src/ast.rs:83:52
[INFO] [stderr]    |
[INFO] [stderr] 83 |             ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]    |                                                    ^^^^^^^^^^ help: try ignoring the field: `parameters: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `body`
[INFO] [stderr]   --> src/ast.rs:83:64
[INFO] [stderr]    |
[INFO] [stderr] 83 |             ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]    |                                                                ^^^^ help: try ignoring the field: `body: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `function`
[INFO] [stderr]   --> src/ast.rs:86:51
[INFO] [stderr]    |
[INFO] [stderr] 86 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]    |                                                   ^^^^^^^^ help: try ignoring the field: `function: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arguments`
[INFO] [stderr]   --> src/ast.rs:86:61
[INFO] [stderr]    |
[INFO] [stderr] 86 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]    |                                                             ^^^^^^^^^ help: try ignoring the field: `arguments: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:89:50
[INFO] [stderr]    |
[INFO] [stderr] 89 |             ExpressionKind::StringLiteral{token, value} => {
[INFO] [stderr]    |                                                  ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:92:51
[INFO] [stderr]    |
[INFO] [stderr] 92 |             ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]    |                                                   ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]   --> src/ast.rs:95:49
[INFO] [stderr]    |
[INFO] [stderr] 95 |             ExpressionKind::WhileLiteral{token, condition, consequence} => {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: try ignoring the field: `condition: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `consequence`
[INFO] [stderr]   --> src/ast.rs:95:60
[INFO] [stderr]    |
[INFO] [stderr] 95 |             ExpressionKind::WhileLiteral{token, condition, consequence} => {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: try ignoring the field: `consequence: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `elements`
[INFO] [stderr]   --> src/ast.rs:98:49
[INFO] [stderr]    |
[INFO] [stderr] 98 |             ExpressionKind::ArrayLiteral{token, elements} => {
[INFO] [stderr]    |                                                 ^^^^^^^^ help: try ignoring the field: `elements: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]    --> src/ast.rs:101:52
[INFO] [stderr]     |
[INFO] [stderr] 101 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                                    ^^^^ help: try ignoring the field: `left: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]    --> src/ast.rs:101:58
[INFO] [stderr]     |
[INFO] [stderr] 101 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                                          ^^^^^ help: try ignoring the field: `index: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:108:40
[INFO] [stderr]     |
[INFO] [stderr] 108 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                        ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:111:46
[INFO] [stderr]     |
[INFO] [stderr] 111 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]     |                                              ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:123:45
[INFO] [stderr]     |
[INFO] [stderr] 123 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]     |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/ast.rs:143:54
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]     |                                                      ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:146:42
[INFO] [stderr]     |
[INFO] [stderr] 146 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:183:44
[INFO] [stderr]     |
[INFO] [stderr] 183 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]     |                                            ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:196:43
[INFO] [stderr]     |
[INFO] [stderr] 196 |             ExpressionKind::StringLiteral{token, value} => {
[INFO] [stderr]     |                                           ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/ast.rs:199:51
[INFO] [stderr]     |
[INFO] [stderr] 199 |             ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]     |                                                   ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:211:42
[INFO] [stderr]     |
[INFO] [stderr] 211 |             ExpressionKind::ArrayLiteral{token, elements} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:223:45
[INFO] [stderr]     |
[INFO] [stderr] 223 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:284:48
[INFO] [stderr]     |
[INFO] [stderr] 284 |             StatementKind::ExpressionStatement{token, expression} => {
[INFO] [stderr]     |                                                ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:294:43
[INFO] [stderr]     |
[INFO] [stderr] 294 |             StatementKind::BlockStatement{token, statements} => {
[INFO] [stderr]     |                                           ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peek_token`
[INFO] [stderr]    --> src/parser.rs:281:13
[INFO] [stderr]     |
[INFO] [stderr] 281 |         let peek_token = self.peek_token.clone();
[INFO] [stderr]     |             ^^^^^^^^^^ help: consider using `_peek_token` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut program = p.parse_program();
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/evaluator.rs:499:5
[INFO] [stderr]     |
[INFO] [stderr] 499 |     panic!("Non-valid string input.");
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |         let mut prefix = self.prefix_parse_call(cur_token.clone());
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn token_literal(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `string`
[INFO] [stderr]   --> src/ast.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn string(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `WhileLiteral`
[INFO] [stderr]   --> src/ast.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     WhileLiteral{token: token::Token, condition: Box<ExpressionKind>, consequence: Box<StatementKind>},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn token_literal(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `string`
[INFO] [stderr]    --> src/ast.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn string(self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]    --> src/ast.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     fn token_literal(self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `string`
[INFO] [stderr]    --> src/ast.rs:255:5
[INFO] [stderr]     |
[INFO] [stderr] 255 |     fn string(self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `as_any`
[INFO] [stderr]    --> src/ast.rs:304:5
[INFO] [stderr]     |
[INFO] [stderr] 304 |     pub fn as_any(&self) -> &Any {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/environment.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn remove(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_call_arguments`
[INFO] [stderr]    --> src/parser.rs:485:5
[INFO] [stderr]     |
[INFO] [stderr] 485 |     fn parse_call_arguments(&mut self) -> Option<Vec<Option<Box<ExpressionKind>>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prase_index_expression`
[INFO] [stderr]    --> src/parser.rs:534:5
[INFO] [stderr]     |
[INFO] [stderr] 534 |     fn prase_index_expression(&mut self, left: Box<ExpressionKind>) -> Option<Box<ExpressionKind>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BuiltIn`
[INFO] [stderr]   --> src/object.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     BuiltIn,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Array`
[INFO] [stderr]   --> src/object.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Array{slots: HashMap<String, ObjectKind>, elements: Vec<ObjectKind>}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_from_slots`
[INFO] [stderr]   --> src/object.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn get_from_slots(self, key: String) -> ObjectKind {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_from_slots`
[INFO] [stderr]   --> src/object.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn remove_from_slots(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_to_slots`
[INFO] [stderr]   --> src/object.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn add_to_slots(&mut self, key: String, value: ObjectKind) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:48:41
[INFO] [stderr]    |
[INFO] [stderr] 48 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:62:41
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:76:41
[INFO] [stderr]    |
[INFO] [stderr] 76 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/evaluator.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 _ => {
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> src/evaluator.rs:164:9
[INFO] [stderr]     |
[INFO] [stderr] 164 |         _ => {
[INFO] [stderr]     |         ^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/ast.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 42 |             _ => {
[INFO] [stderr]    |             ^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:17:45
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 StatementKind::LetStatement{token, name, value} => {
[INFO] [stderr]    |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:27:68
[INFO] [stderr]    |
[INFO] [stderr] 27 |                                         ExpressionKind::Identifier{token, value: name_value} => {
[INFO] [stderr]    |                                                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:54:52
[INFO] [stderr]    |
[INFO] [stderr] 54 |                 StatementKind::ExpressionStatement{token, expression} => {
[INFO] [stderr]    |                                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]   --> src/evaluator.rs:77:50
[INFO] [stderr]    |
[INFO] [stderr] 77 |                 ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                  ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:121:51
[INFO] [stderr]     |
[INFO] [stderr] 121 |                 ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]     |                                                   ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:127:49
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]     |                                                 ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:156:48
[INFO] [stderr]     |
[INFO] [stderr] 156 |                 ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]     |                                                ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slots`
[INFO] [stderr]    --> src/evaluator.rs:303:29
[INFO] [stderr]     |
[INFO] [stderr] 303 |         ObjectKind::Integer{slots, value} => {
[INFO] [stderr]     |                             ^^^^^ help: try ignoring the field: `slots: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/evaluator.rs:303:36
[INFO] [stderr]     |
[INFO] [stderr] 303 |         ObjectKind::Integer{slots, value} => {
[INFO] [stderr]     |                                    ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lslots`
[INFO] [stderr]    --> src/evaluator.rs:316:36
[INFO] [stderr]     |
[INFO] [stderr] 316 |         ObjectKind::Integer{slots: lslots, value: lvalue} => {
[INFO] [stderr]     |                                    ^^^^^^ help: consider using `_lslots` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rslots`
[INFO] [stderr]    --> src/evaluator.rs:318:44
[INFO] [stderr]     |
[INFO] [stderr] 318 |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr]     |                                            ^^^^^^ help: consider using `_rslots` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:360:38
[INFO] [stderr]     |
[INFO] [stderr] 360 |         ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]     |                                      ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:400:36
[INFO] [stderr]     |
[INFO] [stderr] 400 |         ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                    ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/evaluator.rs:449:40
[INFO] [stderr]     |
[INFO] [stderr] 449 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                        ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:68:47
[INFO] [stderr]    |
[INFO] [stderr] 68 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]    |                                               ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/ast.rs:71:53
[INFO] [stderr]    |
[INFO] [stderr] 71 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                     ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/ast.rs:71:63
[INFO] [stderr]    |
[INFO] [stderr] 71 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]    |                                                               ^^^^^ help: try ignoring the field: `right: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> src/ast.rs:74:52
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                    ^^^^ help: try ignoring the field: `left: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/ast.rs:74:58
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                          ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> src/ast.rs:74:68
[INFO] [stderr]    |
[INFO] [stderr] 74 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]    |                                                                    ^^^^^ help: try ignoring the field: `right: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]   --> src/ast.rs:77:49
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: try ignoring the field: `condition: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `consequence`
[INFO] [stderr]   --> src/ast.rs:77:60
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: try ignoring the field: `consequence: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `alternative`
[INFO] [stderr]   --> src/ast.rs:77:73
[INFO] [stderr]    |
[INFO] [stderr] 77 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^ help: try ignoring the field: `alternative: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:80:54
[INFO] [stderr]    |
[INFO] [stderr] 80 |             ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]    |                                                      ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `parameters`
[INFO] [stderr]   --> src/ast.rs:83:52
[INFO] [stderr]    |
[INFO] [stderr] 83 |             ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]    |                                                    ^^^^^^^^^^ help: try ignoring the field: `parameters: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `body`
[INFO] [stderr]   --> src/ast.rs:83:64
[INFO] [stderr]    |
[INFO] [stderr] 83 |             ExpressionKind::FunctionLiteral{token, parameters, body} => {
[INFO] [stderr]    |                                                                ^^^^ help: try ignoring the field: `body: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `function`
[INFO] [stderr]   --> src/ast.rs:86:51
[INFO] [stderr]    |
[INFO] [stderr] 86 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]    |                                                   ^^^^^^^^ help: try ignoring the field: `function: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arguments`
[INFO] [stderr]   --> src/ast.rs:86:61
[INFO] [stderr]    |
[INFO] [stderr] 86 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]    |                                                             ^^^^^^^^^ help: try ignoring the field: `arguments: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:89:50
[INFO] [stderr]    |
[INFO] [stderr] 89 |             ExpressionKind::StringLiteral{token, value} => {
[INFO] [stderr]    |                                                  ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/ast.rs:92:51
[INFO] [stderr]    |
[INFO] [stderr] 92 |             ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]    |                                                   ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]   --> src/ast.rs:95:49
[INFO] [stderr]    |
[INFO] [stderr] 95 |             ExpressionKind::WhileLiteral{token, condition, consequence} => {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: try ignoring the field: `condition: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `consequence`
[INFO] [stderr]   --> src/ast.rs:95:60
[INFO] [stderr]    |
[INFO] [stderr] 95 |             ExpressionKind::WhileLiteral{token, condition, consequence} => {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^ help: try ignoring the field: `consequence: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `elements`
[INFO] [stderr]   --> src/ast.rs:98:49
[INFO] [stderr]    |
[INFO] [stderr] 98 |             ExpressionKind::ArrayLiteral{token, elements} => {
[INFO] [stderr]    |                                                 ^^^^^^^^ help: try ignoring the field: `elements: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]    --> src/ast.rs:101:52
[INFO] [stderr]     |
[INFO] [stderr] 101 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                                    ^^^^ help: try ignoring the field: `left: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `index`
[INFO] [stderr]    --> src/ast.rs:101:58
[INFO] [stderr]     |
[INFO] [stderr] 101 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                                          ^^^^^ help: try ignoring the field: `index: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:108:40
[INFO] [stderr]     |
[INFO] [stderr] 108 |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr]     |                                        ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:111:46
[INFO] [stderr]     |
[INFO] [stderr] 111 |             ExpressionKind::PrefixExpression{token, operator, right} => {
[INFO] [stderr]     |                                              ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:123:45
[INFO] [stderr]     |
[INFO] [stderr] 123 |             ExpressionKind::InfixExpression{token, left, operator, right} => {
[INFO] [stderr]     |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/ast.rs:143:54
[INFO] [stderr]     |
[INFO] [stderr] 143 |             ExpressionKind::BooleanExpression{token, value} => {
[INFO] [stderr]     |                                                      ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:146:42
[INFO] [stderr]     |
[INFO] [stderr] 146 |             ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:183:44
[INFO] [stderr]     |
[INFO] [stderr] 183 |             ExpressionKind::CallExpression{token, function, arguments} => {
[INFO] [stderr]     |                                            ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:196:43
[INFO] [stderr]     |
[INFO] [stderr] 196 |             ExpressionKind::StringLiteral{token, value} => {
[INFO] [stderr]     |                                           ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]    --> src/ast.rs:199:51
[INFO] [stderr]     |
[INFO] [stderr] 199 |             ExpressionKind::IntegerLiteral{token, value} => {
[INFO] [stderr]     |                                                   ^^^^^ help: try ignoring the field: `value: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:211:42
[INFO] [stderr]     |
[INFO] [stderr] 211 |             ExpressionKind::ArrayLiteral{token, elements} => {
[INFO] [stderr]     |                                          ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:223:45
[INFO] [stderr]     |
[INFO] [stderr] 223 |             ExpressionKind::IndexExpression{token, left, index} => {
[INFO] [stderr]     |                                             ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:284:48
[INFO] [stderr]     |
[INFO] [stderr] 284 |             StatementKind::ExpressionStatement{token, expression} => {
[INFO] [stderr]     |                                                ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `token`
[INFO] [stderr]    --> src/ast.rs:294:43
[INFO] [stderr]     |
[INFO] [stderr] 294 |             StatementKind::BlockStatement{token, statements} => {
[INFO] [stderr]     |                                           ^^^^^ help: try ignoring the field: `token: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `peek_token`
[INFO] [stderr]    --> src/parser.rs:281:13
[INFO] [stderr]     |
[INFO] [stderr] 281 |         let peek_token = self.peek_token.clone();
[INFO] [stderr]     |             ^^^^^^^^^^ help: consider using `_peek_token` instead
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]  --> src/ast.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |     ExpressionNode{expressionKind: ExpressionKind},
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]  --> src/ast.rs:8:19
[INFO] [stderr]   |
[INFO] [stderr] 8 |     StatementNode{statementKind: StatementKind},
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/ast.rs:17:20
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 if statements.len() > 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!statements.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]   --> src/ast.rs:29:38
[INFO] [stderr]    |
[INFO] [stderr] 29 |             NodeKind::ExpressionNode{expressionKind} => {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]   --> src/ast.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 |             NodeKind::StatementNode{statementKind} => {
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/repl.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut program = p.parse_program();
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:114:17
[INFO] [stderr]     |
[INFO] [stderr] 114 | /                 match right {
[INFO] [stderr] 115 | |                     Some(x) => {
[INFO] [stderr] 116 | |                         out.push_str(&x.string());
[INFO] [stderr] 117 | |                     }
[INFO] [stderr] 118 | |                     None => {}
[INFO] [stderr] 119 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 if let Some(x) = right {
[INFO] [stderr] 115 |     out.push_str(&x.string());
[INFO] [stderr] 116 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:125:17
[INFO] [stderr]     |
[INFO] [stderr] 125 | /                 match left {
[INFO] [stderr] 126 | |                     Some(s) => {
[INFO] [stderr] 127 | |                         out.push_str(&s.string());
[INFO] [stderr] 128 | |                     },
[INFO] [stderr] 129 | |                     _ => {}
[INFO] [stderr] 130 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 if let Some(s) = left {
[INFO] [stderr] 126 |     out.push_str(&s.string());
[INFO] [stderr] 127 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:134:17
[INFO] [stderr]     |
[INFO] [stderr] 134 | /                 match right {
[INFO] [stderr] 135 | |                     Some(s) => {
[INFO] [stderr] 136 | |                         out.push_str(&s.string());
[INFO] [stderr] 137 | |                     },
[INFO] [stderr] 138 | |                     _ => {}
[INFO] [stderr] 139 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 if let Some(s) = right {
[INFO] [stderr] 135 |     out.push_str(&s.string());
[INFO] [stderr] 136 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:148:17
[INFO] [stderr]     |
[INFO] [stderr] 148 | /                 match condition {
[INFO] [stderr] 149 | |                     Some(c) => {
[INFO] [stderr] 150 | |                         out.push_str(&c.string());
[INFO] [stderr] 151 | |                     },
[INFO] [stderr] 152 | |                     _ => {}
[INFO] [stderr] 153 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 148 |                 if let Some(c) = condition {
[INFO] [stderr] 149 |     out.push_str(&c.string());
[INFO] [stderr] 150 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:155:17
[INFO] [stderr]     |
[INFO] [stderr] 155 | /                 match consequence {
[INFO] [stderr] 156 | |                     Some(c) => {
[INFO] [stderr] 157 | |                         out.push_str(&c.string());
[INFO] [stderr] 158 | |                     },
[INFO] [stderr] 159 | |                     _ => {}
[INFO] [stderr] 160 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 155 |                 if let Some(c) = consequence {
[INFO] [stderr] 156 |     out.push_str(&c.string());
[INFO] [stderr] 157 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:162:17
[INFO] [stderr]     |
[INFO] [stderr] 162 | /                 match alternative {
[INFO] [stderr] 163 | |                     Some(a) => {
[INFO] [stderr] 164 | |                         out.push_str("else ");
[INFO] [stderr] 165 | |                         out.push_str(&a.string());
[INFO] [stderr] 166 | |                     },
[INFO] [stderr] 167 | |                     _ => {}
[INFO] [stderr] 168 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 162 |                 if let Some(a) = alternative {
[INFO] [stderr] 163 |     out.push_str("else ");
[INFO] [stderr] 164 |     out.push_str(&a.string());
[INFO] [stderr] 165 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `argsVec` should have a snake case name such as `args_vec`
[INFO] [stderr]    --> src/ast.rs:187:21
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 let mut argsVec = vec![];
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `elesVec` should have a snake case name such as `eles_vec`
[INFO] [stderr]    --> src/ast.rs:214:21
[INFO] [stderr]     |
[INFO] [stderr] 214 |                 let mut elesVec = vec![];
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:228:17
[INFO] [stderr]     |
[INFO] [stderr] 228 | /                 match index {
[INFO] [stderr] 229 | |                     Some(i) => {
[INFO] [stderr] 230 | |                         out.push_str(&i.string());
[INFO] [stderr] 231 | |                     }
[INFO] [stderr] 232 | |                     _ => {}
[INFO] [stderr] 233 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 228 |                 if let Some(i) = index {
[INFO] [stderr] 229 |     out.push_str(&i.string());
[INFO] [stderr] 230 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:263:17
[INFO] [stderr]     |
[INFO] [stderr] 263 | /                 match value {
[INFO] [stderr] 264 | |                     Some(x) => {
[INFO] [stderr] 265 | |                         out.push_str(&x.string());
[INFO] [stderr] 266 | |                     }
[INFO] [stderr] 267 | |                     _ => {}
[INFO] [stderr] 268 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 263 |                 if let Some(x) = value {
[INFO] [stderr] 264 |     out.push_str(&x.string());
[INFO] [stderr] 265 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:275:17
[INFO] [stderr]     |
[INFO] [stderr] 275 | /                 match return_value {
[INFO] [stderr] 276 | |                     Some(rv) => {
[INFO] [stderr] 277 | |                         out.push_str(&rv.string());
[INFO] [stderr] 278 | |                     }
[INFO] [stderr] 279 | |                     _ => {}
[INFO] [stderr] 280 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 275 |                 if let Some(rv) = return_value {
[INFO] [stderr] 276 |     out.push_str(&rv.string());
[INFO] [stderr] 277 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]   --> src/evaluator.rs:15:33
[INFO] [stderr]    |
[INFO] [stderr] 15 |         NodeKind::StatementNode{statementKind} => {
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:18:21
[INFO] [stderr]    |
[INFO] [stderr] 18 | /                     match value {
[INFO] [stderr] 19 | |                         Some(v) => {
[INFO] [stderr] 20 | |                             let val = eval(NodeKind::ExpressionNode{expressionKind: *v}, env);
[INFO] [stderr] 21 | |                             match val {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |                         _ => {}
[INFO] [stderr] 36 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 18 |                     if let Some(v) = value {
[INFO] [stderr] 19 |     let val = eval(NodeKind::ExpressionNode{expressionKind: *v}, env);
[INFO] [stderr] 20 |     match val {
[INFO] [stderr] 21 |         ObjectKind::Error{..} => {
[INFO] [stderr] 22 |             return val;
[INFO] [stderr] 23 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:26:37
[INFO] [stderr]    |
[INFO] [stderr] 26 | /                                     match name {
[INFO] [stderr] 27 | |                                         ExpressionKind::Identifier{token, value: name_value} => {
[INFO] [stderr] 28 | |                                             env.insert(name_value, val);
[INFO] [stderr] 29 | |                                         },
[INFO] [stderr] 30 | |                                         _ => {}
[INFO] [stderr] 31 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 26 |                                     if let ExpressionKind::Identifier{token, value: name_value} = name {
[INFO] [stderr] 27 |     env.insert(name_value, val);
[INFO] [stderr] 28 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: the `return_value:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:38:48
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 StatementKind::ReturnStatement{return_value: return_value, ..} => {
[INFO] [stderr]    |                                                -------------^^^^^^^^^^^^^
[INFO] [stderr]    |                                                |
[INFO] [stderr]    |                                                help: remove this
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 | /                     match return_value {
[INFO] [stderr] 40 | |                         Some(return_val) => {
[INFO] [stderr] 41 | |                             let val = eval(NodeKind::StatementNode{statementKind: *return_val}, env);
[INFO] [stderr] 42 | |                             match is_error(val.clone()) {
[INFO] [stderr] ...  |
[INFO] [stderr] 50 | |                         None => {}
[INFO] [stderr] 51 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 39 |                     if let Some(return_val) = return_value {
[INFO] [stderr] 40 |     let val = eval(NodeKind::StatementNode{statementKind: *return_val}, env);
[INFO] [stderr] 41 |     match is_error(val.clone()) {
[INFO] [stderr] 42 |         true => {
[INFO] [stderr] 43 |             return val.clone();
[INFO] [stderr] 44 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/evaluator.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 | /                             match is_error(val.clone()) {
[INFO] [stderr] 43 | |                                 true => {
[INFO] [stderr] 44 | |                                     return val.clone();
[INFO] [stderr] 45 | |                                 },
[INFO] [stderr] 46 | |                                 _ => {}
[INFO] [stderr] 47 | |                             }
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 42 |                             if is_error(val.clone()) {
[INFO] [stderr] 43 |     return val.clone();
[INFO] [stderr] 44 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]   --> src/evaluator.rs:72:34
[INFO] [stderr]    |
[INFO] [stderr] 72 |         NodeKind::ExpressionNode{expressionKind} => {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:78:21
[INFO] [stderr]    |
[INFO] [stderr] 78 | /                     match right {
[INFO] [stderr] 79 | |                         Some(r) => {
[INFO] [stderr] 80 | |                             let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 81 | |                             match eval_right {
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |                         _ => {}
[INFO] [stderr] 91 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 78 |                     if let Some(r) = right {
[INFO] [stderr] 79 |     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 80 |     match eval_right {
[INFO] [stderr] 81 |         ObjectKind::Error{..} => {
[INFO] [stderr] 82 |             return eval_right;
[INFO] [stderr] 83 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: the `operator:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:49
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                 ---------^^^^^^^^^
[INFO] [stderr]    |                                                 |
[INFO] [stderr]    |                                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `left:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:69
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                                     -----^^^^^
[INFO] [stderr]    |                                                                     |
[INFO] [stderr]    |                                                                     help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `right:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:81
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                                                 ------^^^^^^
[INFO] [stderr]    |                                                                                 |
[INFO] [stderr]    |                                                                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:95:21
[INFO] [stderr]     |
[INFO] [stderr] 95  | /                     match left {
[INFO] [stderr] 96  | |                         Some(l) => {
[INFO] [stderr] 97  | |                             let eval_left = eval(NodeKind::ExpressionNode{expressionKind: *l}, env);
[INFO] [stderr] 98  | |                             match is_error(eval_left.clone()) {
[INFO] [stderr] ...   |
[INFO] [stderr] 118 | |                         _ => {}
[INFO] [stderr] 119 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 95  |                     if let Some(l) = left {
[INFO] [stderr] 96  |     let eval_left = eval(NodeKind::ExpressionNode{expressionKind: *l}, env);
[INFO] [stderr] 97  |     match is_error(eval_left.clone()) {
[INFO] [stderr] 98  |         true => {
[INFO] [stderr] 99  |             return eval_left.clone();
[INFO] [stderr] 100 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:98:29
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                             match is_error(eval_left.clone()) {
[INFO] [stderr] 99  | |                                 true => {
[INFO] [stderr] 100 | |                                     return eval_left.clone();
[INFO] [stderr] 101 | |                                 },
[INFO] [stderr] 102 | |                                 _ => {}
[INFO] [stderr] 103 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 98  |                             if is_error(eval_left.clone()) {
[INFO] [stderr] 99  |     return eval_left.clone();
[INFO] [stderr] 100 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:104:29
[INFO] [stderr]     |
[INFO] [stderr] 104 | /                             match right {
[INFO] [stderr] 105 | |                                 Some(r) => {
[INFO] [stderr] 106 | |                                     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 107 | |                                     match is_error(eval_right.clone()) {
[INFO] [stderr] ...   |
[INFO] [stderr] 115 | |                                 _ => {}
[INFO] [stderr] 116 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 104 |                             if let Some(r) = right {
[INFO] [stderr] 105 |     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 106 |     match is_error(eval_right.clone()) {
[INFO] [stderr] 107 |         true => {
[INFO] [stderr] 108 |             return eval_right.clone();
[INFO] [stderr] 109 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:107:37
[INFO] [stderr]     |
[INFO] [stderr] 107 | /                                     match is_error(eval_right.clone()) {
[INFO] [stderr] 108 | |                                         true => {
[INFO] [stderr] 109 | |                                             return eval_right.clone();
[INFO] [stderr] 110 | |                                         },
[INFO] [stderr] 111 | |                                         _ => {}
[INFO] [stderr] 112 | |                                     }
[INFO] [stderr]     | |_____________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 107 |                                     if is_error(eval_right.clone()) {
[INFO] [stderr] 108 |     return eval_right.clone();
[INFO] [stderr] 109 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `function:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:130:48
[INFO] [stderr]     |
[INFO] [stderr] 130 |                 ExpressionKind::CallExpression{function: function, arguments, ..} => {
[INFO] [stderr]     |                                                ---------^^^^^^^^^
[INFO] [stderr]     |                                                |
[INFO] [stderr]     |                                                help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:134:21
[INFO] [stderr]     |
[INFO] [stderr] 134 | /                     match args.len() == 1 {
[INFO] [stderr] 135 | |                         true => {
[INFO] [stderr] 136 | |                             match args.get(0) {
[INFO] [stderr] 137 | |                                 Some(arg) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 149 | |                         _ => {}
[INFO] [stderr] 150 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 134 |                     if args.len() == 1 {
[INFO] [stderr] 135 |     match args.get(0) {
[INFO] [stderr] 136 |         Some(arg) => {
[INFO] [stderr] 137 |             let first_arg = arg.clone();
[INFO] [stderr] 138 |             match is_error(first_arg) {
[INFO] [stderr] 139 |                 true => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:136:29
[INFO] [stderr]     |
[INFO] [stderr] 136 | /                             match args.get(0) {
[INFO] [stderr] 137 | |                                 Some(arg) => {
[INFO] [stderr] 138 | |                                     let first_arg = arg.clone();
[INFO] [stderr] 139 | |                                     match is_error(first_arg) {
[INFO] [stderr] ...   |
[INFO] [stderr] 146 | |                                 _ => {}
[INFO] [stderr] 147 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 136 |                             if let Some(arg) = args.get(0) {
[INFO] [stderr] 137 |     let first_arg = arg.clone();
[INFO] [stderr] 138 |     match is_error(first_arg) {
[INFO] [stderr] 139 |         true => {
[INFO] [stderr] 140 |             return arg.clone();
[INFO] [stderr] 141 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:139:37
[INFO] [stderr]     |
[INFO] [stderr] 139 | /                                     match is_error(first_arg) {
[INFO] [stderr] 140 | |                                         true => {
[INFO] [stderr] 141 | |                                             return arg.clone();
[INFO] [stderr] 142 | |                                         },
[INFO] [stderr] 143 | |                                         _ => {}
[INFO] [stderr] 144 | |                                     }
[INFO] [stderr]     | |_____________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                     if is_error(first_arg) {
[INFO] [stderr] 140 |     return arg.clone();
[INFO] [stderr] 141 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:153:47
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 ExpressionKind::StringLiteral{value: value, ..} => {
[INFO] [stderr]     |                                               ------^^^^^^
[INFO] [stderr]     |                                               |
[INFO] [stderr]     |                                               help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: variable `sNode` should have a snake case name such as `s_node`
[INFO] [stderr]    --> src/evaluator.rs:174:13
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let sNode = NodeKind::StatementNode{statementKind: s};
[INFO] [stderr]     |             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 | /             match right {
[INFO] [stderr] 207 | |                 ObjectKind::Integer{..} => {
[INFO] [stderr] 208 | |                     return eval_integer_infix_expression(operator, left, right);
[INFO] [stderr] 209 | |                 },
[INFO] [stderr] 210 | |                 _ => {}
[INFO] [stderr] 211 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 206 |             if let ObjectKind::Integer{..} = right {
[INFO] [stderr] 207 |     return eval_integer_infix_expression(operator, left, right);
[INFO] [stderr] 208 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 | /             match right {
[INFO] [stderr] 215 | |                 ObjectKind::Boolean{value: r_value} => {
[INFO] [stderr] 216 | |                     match operator.as_ref() {
[INFO] [stderr] 217 | |                         "==" => {
[INFO] [stderr] ...   |
[INFO] [stderr] 226 | |                 _ => {}
[INFO] [stderr] 227 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 214 |             if let ObjectKind::Boolean{value: r_value} = right {
[INFO] [stderr] 215 |     match operator.as_ref() {
[INFO] [stderr] 216 |         "==" => {
[INFO] [stderr] 217 |             return native_bool_to_boolean_object(l_value == r_value);
[INFO] [stderr] 218 |         },
[INFO] [stderr] 219 |         "!=" => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:231:13
[INFO] [stderr]     |
[INFO] [stderr] 231 | /             match left_clone.variant_eq(&right) {
[INFO] [stderr] 232 | |                 true => {
[INFO] [stderr] 233 | |                     return eval_string_infix_expression(operator, left.clone(), right)
[INFO] [stderr] 234 | |                 },
[INFO] [stderr] 235 | |                 _ => {}
[INFO] [stderr] 236 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 231 |             if left_clone.variant_eq(&right) {
[INFO] [stderr] 232 |     return eval_string_infix_expression(operator, left.clone(), right)
[INFO] [stderr] 233 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:240:5
[INFO] [stderr]     |
[INFO] [stderr] 240 | /     match left.variant_eq(&right) {
[INFO] [stderr] 241 | |         false => {
[INFO] [stderr] 242 | |             panic!("infix operator not valid for types");
[INFO] [stderr] 243 | |         },
[INFO] [stderr] 244 | |         _ => {}
[INFO] [stderr] 245 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 240 |     if !left.variant_eq(&right) {
[INFO] [stderr] 241 |     panic!("infix operator not valid for types");
[INFO] [stderr] 242 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:270:5
[INFO] [stderr]     |
[INFO] [stderr] 270 | /     match block {
[INFO] [stderr] 271 | |         StatementKind::BlockStatement{statements: statements, ..} => {
[INFO] [stderr] 272 | |             for statement in statements {
[INFO] [stderr] 273 | |                 result = eval(NodeKind::StatementNode{statementKind:*statement}, env);
[INFO] [stderr] ...   |
[INFO] [stderr] 282 | |         _ => {}
[INFO] [stderr] 283 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 270 |     if let StatementKind::BlockStatement{statements: statements, ..} = block {
[INFO] [stderr] 271 |     for statement in statements {
[INFO] [stderr] 272 |         result = eval(NodeKind::StatementNode{statementKind:*statement}, env);
[INFO] [stderr] 273 |         match result {
[INFO] [stderr] 274 |             ObjectKind::ReturnValue{..} | ObjectKind::Error{..} => {
[INFO] [stderr] 275 |                 return result.clone();
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: the `statements:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:271:39
[INFO] [stderr]     |
[INFO] [stderr] 271 |         StatementKind::BlockStatement{statements: statements, ..} => {
[INFO] [stderr]     |                                       -----------^^^^^^^^^^^
[INFO] [stderr]     |                                       |
[INFO] [stderr]     |                                       help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:315:5
[INFO] [stderr]     |
[INFO] [stderr] 315 | /     match left {
[INFO] [stderr] 316 | |         ObjectKind::Integer{slots: lslots, value: lvalue} => {
[INFO] [stderr] 317 | |             match right {
[INFO] [stderr] 318 | |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] ...   |
[INFO] [stderr] 353 | |         _ => {}
[INFO] [stderr] 354 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 315 |     if let ObjectKind::Integer{slots: lslots, value: lvalue} = left {
[INFO] [stderr] 316 |     match right {
[INFO] [stderr] 317 |         ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] 318 |             match operator.as_ref() {
[INFO] [stderr] 319 |                 "+" => {   
[INFO] [stderr] 320 |                     return ObjectKind::Integer{slots: HashMap::new(), value: lvalue + rvalue};
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:317:13
[INFO] [stderr]     |
[INFO] [stderr] 317 | /             match right {
[INFO] [stderr] 318 | |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] 319 | |                     match operator.as_ref() {
[INFO] [stderr] 320 | |                         "+" => {   
[INFO] [stderr] ...   |
[INFO] [stderr] 350 | |                 _ => {}
[INFO] [stderr] 351 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 317 |             if let ObjectKind::Integer{slots: rslots, value: rvalue} = right {
[INFO] [stderr] 318 |     match operator.as_ref() {
[INFO] [stderr] 319 |         "+" => {   
[INFO] [stderr] 320 |             return ObjectKind::Integer{slots: HashMap::new(), value: lvalue + rvalue};
[INFO] [stderr] 321 |         },
[INFO] [stderr] 322 |         "-" => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     match ie {
[INFO] [stderr] 360 | |         ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr] 361 | |             match condition {
[INFO] [stderr] 362 | |                 Some(c) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 390 | |         _ => {}
[INFO] [stderr] 391 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 359 |     if let ExpressionKind::IfExpression{token, condition, consequence, alternative} = ie {
[INFO] [stderr] 360 |     match condition {
[INFO] [stderr] 361 |         Some(c) => {
[INFO] [stderr] 362 |             let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 363 |             match evaluated_condition {
[INFO] [stderr] 364 |                 ObjectKind::Error{..} => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:361:13
[INFO] [stderr]     |
[INFO] [stderr] 361 | /             match condition {
[INFO] [stderr] 362 | |                 Some(c) => {
[INFO] [stderr] 363 | |                     let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 364 | |                     match evaluated_condition {
[INFO] [stderr] ...   |
[INFO] [stderr] 387 | |                 _ => {}
[INFO] [stderr] 388 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 361 |             if let Some(c) = condition {
[INFO] [stderr] 362 |     let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 363 |     match evaluated_condition {
[INFO] [stderr] 364 |         ObjectKind::Error{..} => {
[INFO] [stderr] 365 |             return evaluated_condition;
[INFO] [stderr] 366 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:370:33
[INFO] [stderr]     |
[INFO] [stderr] 370 | /                                 match consequence {
[INFO] [stderr] 371 | |                                     Some(con) => {
[INFO] [stderr] 372 | |                                         return eval(NodeKind::StatementNode{statementKind:*con}, env);
[INFO] [stderr] 373 | |                                     },
[INFO] [stderr] 374 | |                                     _ => {}
[INFO] [stderr] 375 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 370 |                                 if let Some(con) = consequence {
[INFO] [stderr] 371 |     return eval(NodeKind::StatementNode{statementKind:*con}, env);
[INFO] [stderr] 372 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:377:33
[INFO] [stderr]     |
[INFO] [stderr] 377 | /                                 match alternative {
[INFO] [stderr] 378 | |                                     Some(alt) => {
[INFO] [stderr] 379 | |                                         return eval(NodeKind::StatementNode{statementKind:*alt}, env);
[INFO] [stderr] 380 | |                                     },
[INFO] [stderr] 381 | |                                     _ => {}
[INFO] [stderr] 382 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 377 |                                 if let Some(alt) = alternative {
[INFO] [stderr] 378 |     return eval(NodeKind::StatementNode{statementKind:*alt}, env);
[INFO] [stderr] 379 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressioNode` should have a snake case name such as `expressio_node`
[INFO] [stderr]    --> src/evaluator.rs:417:13
[INFO] [stderr]     |
[INFO] [stderr] 417 |         let expressioNode = NodeKind::ExpressionNode{expressionKind: *e};
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:419:3
[INFO] [stderr]     |
[INFO] [stderr] 419 |           match evaluated {
[INFO] [stderr]     |  _________^
[INFO] [stderr] 420 | |             ObjectKind::Error{..} => {
[INFO] [stderr] 421 | |                 panic!("not implmented");
[INFO] [stderr] 422 | |             },
[INFO] [stderr] 423 | |             _ => {}
[INFO] [stderr] 424 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 419 |         if let ObjectKind::Error{..} = evaluated {
[INFO] [stderr] 420 |     panic!("not implmented");
[INFO] [stderr] 421 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `parameters:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                              -----------^^^^^^^^^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `body:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:54
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                                                      -----^^^^^
[INFO] [stderr]     |                                                      |
[INFO] [stderr]     |                                                      help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `env:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:66
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                                                                  ----^^^^
[INFO] [stderr]     |                                                                  |
[INFO] [stderr]     |                                                                  help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:448:9
[INFO] [stderr]     |
[INFO] [stderr] 448 | /         match param {
[INFO] [stderr] 449 | |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr] 450 | |                 match args.get(param_index) {
[INFO] [stderr] 451 | |                     Some(arg) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 457 | |             _ => {}
[INFO] [stderr] 458 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 448 |         if let ExpressionKind::Identifier{token, value} = param {
[INFO] [stderr] 449 |     match args.get(param_index) {
[INFO] [stderr] 450 |         Some(arg) => {
[INFO] [stderr] 451 |             closure.insert(value, arg.clone());
[INFO] [stderr] 452 |         },
[INFO] [stderr] 453 |         _ => {}
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:450:17
[INFO] [stderr]     |
[INFO] [stderr] 450 | /                 match args.get(param_index) {
[INFO] [stderr] 451 | |                     Some(arg) => {
[INFO] [stderr] 452 | |                         closure.insert(value, arg.clone());
[INFO] [stderr] 453 | |                     },
[INFO] [stderr] 454 | |                     _ => {}
[INFO] [stderr] 455 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 450 |                 if let Some(arg) = args.get(param_index) {
[INFO] [stderr] 451 |     closure.insert(value, arg.clone());
[INFO] [stderr] 452 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/evaluator.rs:459:9
[INFO] [stderr]     |
[INFO] [stderr] 459 |         param_index = param_index + 1;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `param_index += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:476:5
[INFO] [stderr]     |
[INFO] [stderr] 476 | /     match operator != "+" {
[INFO] [stderr] 477 | |         true => {
[INFO] [stderr] 478 | |             return ObjectKind::Error{message: String::from("not a valid operator.")};
[INFO] [stderr] 479 | |         },
[INFO] [stderr] 480 | |         _ => {}
[INFO] [stderr] 481 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 476 |     if operator != "+" {
[INFO] [stderr] 477 |     return ObjectKind::Error{message: String::from("not a valid operator.")};
[INFO] [stderr] 478 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 | /             match stmt {
[INFO] [stderr] 180 | |                 Some(x) => {
[INFO] [stderr] 181 | |                     stmt_vec.push(*x);
[INFO] [stderr] 182 | |                 },
[INFO] [stderr] 183 | |                 None => {}
[INFO] [stderr] 184 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 179 |             if let Some(x) = stmt {
[INFO] [stderr] 180 |     stmt_vec.push(*x);
[INFO] [stderr] 181 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/parser.rs:214:19
[INFO] [stderr]     |
[INFO] [stderr] 214 |           let msg = String::from(format!("expected next token to be {}, got {} instead",
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 215 | |         t.name, token.t_type.name));
[INFO] [stderr]     | |___________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] help: consider removing `String::from()`
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let msg = format!("expected next token to be {}, got {} instead",
[INFO] [stderr] 215 |         t.name, token.t_type.name);
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/parser.rs:394:9
[INFO] [stderr]     |
[INFO] [stderr] 394 | /         let mut alternative = None;
[INFO] [stderr] 395 | |         if self.peek_token_is(token::ELSE) {
[INFO] [stderr] 396 | |             self.next_token();
[INFO] [stderr] 397 | |             if !self.expect_peek(token::LBRACE) {
[INFO] [stderr] ...   |
[INFO] [stderr] 400 | |             alternative = self.parse_block_statement();
[INFO] [stderr] 401 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let <mut> alternative = if self.peek_token_is(token::ELSE) { ..; self.parse_block_statement() } else { None };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:411:13
[INFO] [stderr]     |
[INFO] [stderr] 411 | /             match stmt {
[INFO] [stderr] 412 | |                 Some(x) => {
[INFO] [stderr] 413 | |                     statements.push(x);
[INFO] [stderr] 414 | |                 },
[INFO] [stderr] 415 | |                 None => {}
[INFO] [stderr] 416 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 411 |             if let Some(x) = stmt {
[INFO] [stderr] 412 |     statements.push(x);
[INFO] [stderr] 413 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `argsUnwrapped` should have a snake case name such as `args_unwrapped`
[INFO] [stderr]    --> src/parser.rs:471:26
[INFO] [stderr]     |
[INFO] [stderr] 471 |                     Some(argsUnwrapped) => {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:282:13
[INFO] [stderr]     |
[INFO] [stderr] 282 |         let mut prefix = self.prefix_parse_call(cur_token.clone());
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/object.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Function{slots: HashMap<String, ObjectKind>, parameters: Vec<ExpressionKind>, body: StatementKind, env: Environment},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/object.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Function{slots: HashMap<String, ObjectKind>, parameters: Vec<ExpressionKind>, body: StatementKind, env: Environment},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:75:33
[INFO] [stderr]    |
[INFO] [stderr] 75 |             ObjectKind::Integer{value: value, ..} => {
[INFO] [stderr]    |                                 ------^^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `message:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:78:31
[INFO] [stderr]    |
[INFO] [stderr] 78 |             ObjectKind::Error{message: message, ..} => {
[INFO] [stderr]    |                               --------^^^^^^^^
[INFO] [stderr]    |                               |
[INFO] [stderr]    |                               help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:84:35
[INFO] [stderr]    |
[INFO] [stderr] 84 |             ObjectKind::StringObj{value: value, ..} => {
[INFO] [stderr]    |                                   ------^^^^^^
[INFO] [stderr]    |                                   |
[INFO] [stderr]    |                                   help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn token_literal(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `string`
[INFO] [stderr]   --> src/ast.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     fn string(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `WhileLiteral`
[INFO] [stderr]   --> src/ast.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     WhileLiteral{token: token::Token, condition: Box<ExpressionKind>, consequence: Box<StatementKind>},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]   --> src/ast.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn token_literal(self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `token_literal`
[INFO] [stderr]    --> src/ast.rs:251:5
[INFO] [stderr]     |
[INFO] [stderr] 251 |     fn token_literal(self) -> String {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `as_any`
[INFO] [stderr]    --> src/ast.rs:304:5
[INFO] [stderr]     |
[INFO] [stderr] 304 |     pub fn as_any(&self) -> &Any {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/environment.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn remove(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_call_arguments`
[INFO] [stderr]    --> src/parser.rs:485:5
[INFO] [stderr]     |
[INFO] [stderr] 485 |     fn parse_call_arguments(&mut self) -> Option<Vec<Option<Box<ExpressionKind>>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prase_index_expression`
[INFO] [stderr]    --> src/parser.rs:534:5
[INFO] [stderr]     |
[INFO] [stderr] 534 |     fn prase_index_expression(&mut self, left: Box<ExpressionKind>) -> Option<Box<ExpressionKind>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BuiltIn`
[INFO] [stderr]   --> src/object.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     BuiltIn,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Array`
[INFO] [stderr]   --> src/object.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Array{slots: HashMap<String, ObjectKind>, elements: Vec<ObjectKind>}
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_from_slots`
[INFO] [stderr]   --> src/object.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn get_from_slots(self, key: String) -> ObjectKind {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_from_slots`
[INFO] [stderr]   --> src/object.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn remove_from_slots(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add_to_slots`
[INFO] [stderr]   --> src/object.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn add_to_slots(&mut self, key: String, value: ObjectKind) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:48:41
[INFO] [stderr]    |
[INFO] [stderr] 48 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:62:41
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> src/lexer.rs:76:41
[INFO] [stderr]    |
[INFO] [stderr] 76 |                     let mut l_literal = String::from(ch.to_string());
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `ch.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter() and will not move the slice
[INFO] [stderr]    --> src/lexer.rs:487:32
[INFO] [stderr]     |
[INFO] [stderr] 487 |         for output in expected.into_iter() {
[INFO] [stderr]     |                                ^^^^^^^^^ help: call directly: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]  --> src/ast.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |     ExpressionNode{expressionKind: ExpressionKind},
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]  --> src/ast.rs:8:19
[INFO] [stderr]   |
[INFO] [stderr] 8 |     StatementNode{statementKind: StatementKind},
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/ast.rs:17:20
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 if statements.len() > 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!statements.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]   --> src/ast.rs:29:38
[INFO] [stderr]    |
[INFO] [stderr] 29 |             NodeKind::ExpressionNode{expressionKind} => {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]   --> src/ast.rs:32:37
[INFO] [stderr]    |
[INFO] [stderr] 32 |             NodeKind::StatementNode{statementKind} => {
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:114:17
[INFO] [stderr]     |
[INFO] [stderr] 114 | /                 match right {
[INFO] [stderr] 115 | |                     Some(x) => {
[INFO] [stderr] 116 | |                         out.push_str(&x.string());
[INFO] [stderr] 117 | |                     }
[INFO] [stderr] 118 | |                     None => {}
[INFO] [stderr] 119 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 114 |                 if let Some(x) = right {
[INFO] [stderr] 115 |     out.push_str(&x.string());
[INFO] [stderr] 116 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:125:17
[INFO] [stderr]     |
[INFO] [stderr] 125 | /                 match left {
[INFO] [stderr] 126 | |                     Some(s) => {
[INFO] [stderr] 127 | |                         out.push_str(&s.string());
[INFO] [stderr] 128 | |                     },
[INFO] [stderr] 129 | |                     _ => {}
[INFO] [stderr] 130 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 125 |                 if let Some(s) = left {
[INFO] [stderr] 126 |     out.push_str(&s.string());
[INFO] [stderr] 127 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:134:17
[INFO] [stderr]     |
[INFO] [stderr] 134 | /                 match right {
[INFO] [stderr] 135 | |                     Some(s) => {
[INFO] [stderr] 136 | |                         out.push_str(&s.string());
[INFO] [stderr] 137 | |                     },
[INFO] [stderr] 138 | |                     _ => {}
[INFO] [stderr] 139 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 134 |                 if let Some(s) = right {
[INFO] [stderr] 135 |     out.push_str(&s.string());
[INFO] [stderr] 136 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:148:17
[INFO] [stderr]     |
[INFO] [stderr] 148 | /                 match condition {
[INFO] [stderr] 149 | |                     Some(c) => {
[INFO] [stderr] 150 | |                         out.push_str(&c.string());
[INFO] [stderr] 151 | |                     },
[INFO] [stderr] 152 | |                     _ => {}
[INFO] [stderr] 153 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 148 |                 if let Some(c) = condition {
[INFO] [stderr] 149 |     out.push_str(&c.string());
[INFO] [stderr] 150 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:155:17
[INFO] [stderr]     |
[INFO] [stderr] 155 | /                 match consequence {
[INFO] [stderr] 156 | |                     Some(c) => {
[INFO] [stderr] 157 | |                         out.push_str(&c.string());
[INFO] [stderr] 158 | |                     },
[INFO] [stderr] 159 | |                     _ => {}
[INFO] [stderr] 160 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 155 |                 if let Some(c) = consequence {
[INFO] [stderr] 156 |     out.push_str(&c.string());
[INFO] [stderr] 157 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:162:17
[INFO] [stderr]     |
[INFO] [stderr] 162 | /                 match alternative {
[INFO] [stderr] 163 | |                     Some(a) => {
[INFO] [stderr] 164 | |                         out.push_str("else ");
[INFO] [stderr] 165 | |                         out.push_str(&a.string());
[INFO] [stderr] 166 | |                     },
[INFO] [stderr] 167 | |                     _ => {}
[INFO] [stderr] 168 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 162 |                 if let Some(a) = alternative {
[INFO] [stderr] 163 |     out.push_str("else ");
[INFO] [stderr] 164 |     out.push_str(&a.string());
[INFO] [stderr] 165 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `argsVec` should have a snake case name such as `args_vec`
[INFO] [stderr]    --> src/ast.rs:187:21
[INFO] [stderr]     |
[INFO] [stderr] 187 |                 let mut argsVec = vec![];
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `elesVec` should have a snake case name such as `eles_vec`
[INFO] [stderr]    --> src/ast.rs:214:21
[INFO] [stderr]     |
[INFO] [stderr] 214 |                 let mut elesVec = vec![];
[INFO] [stderr]     |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:228:17
[INFO] [stderr]     |
[INFO] [stderr] 228 | /                 match index {
[INFO] [stderr] 229 | |                     Some(i) => {
[INFO] [stderr] 230 | |                         out.push_str(&i.string());
[INFO] [stderr] 231 | |                     }
[INFO] [stderr] 232 | |                     _ => {}
[INFO] [stderr] 233 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 228 |                 if let Some(i) = index {
[INFO] [stderr] 229 |     out.push_str(&i.string());
[INFO] [stderr] 230 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:263:17
[INFO] [stderr]     |
[INFO] [stderr] 263 | /                 match value {
[INFO] [stderr] 264 | |                     Some(x) => {
[INFO] [stderr] 265 | |                         out.push_str(&x.string());
[INFO] [stderr] 266 | |                     }
[INFO] [stderr] 267 | |                     _ => {}
[INFO] [stderr] 268 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 263 |                 if let Some(x) = value {
[INFO] [stderr] 264 |     out.push_str(&x.string());
[INFO] [stderr] 265 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/ast.rs:275:17
[INFO] [stderr]     |
[INFO] [stderr] 275 | /                 match return_value {
[INFO] [stderr] 276 | |                     Some(rv) => {
[INFO] [stderr] 277 | |                         out.push_str(&rv.string());
[INFO] [stderr] 278 | |                     }
[INFO] [stderr] 279 | |                     _ => {}
[INFO] [stderr] 280 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 275 |                 if let Some(rv) = return_value {
[INFO] [stderr] 276 |     out.push_str(&rv.string());
[INFO] [stderr] 277 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `statementKind` should have a snake case name such as `statement_kind`
[INFO] [stderr]   --> src/evaluator.rs:15:33
[INFO] [stderr]    |
[INFO] [stderr] 15 |         NodeKind::StatementNode{statementKind} => {
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:18:21
[INFO] [stderr]    |
[INFO] [stderr] 18 | /                     match value {
[INFO] [stderr] 19 | |                         Some(v) => {
[INFO] [stderr] 20 | |                             let val = eval(NodeKind::ExpressionNode{expressionKind: *v}, env);
[INFO] [stderr] 21 | |                             match val {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |                         _ => {}
[INFO] [stderr] 36 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 18 |                     if let Some(v) = value {
[INFO] [stderr] 19 |     let val = eval(NodeKind::ExpressionNode{expressionKind: *v}, env);
[INFO] [stderr] 20 |     match val {
[INFO] [stderr] 21 |         ObjectKind::Error{..} => {
[INFO] [stderr] 22 |             return val;
[INFO] [stderr] 23 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:26:37
[INFO] [stderr]    |
[INFO] [stderr] 26 | /                                     match name {
[INFO] [stderr] 27 | |                                         ExpressionKind::Identifier{token, value: name_value} => {
[INFO] [stderr] 28 | |                                             env.insert(name_value, val);
[INFO] [stderr] 29 | |                                         },
[INFO] [stderr] 30 | |                                         _ => {}
[INFO] [stderr] 31 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 26 |                                     if let ExpressionKind::Identifier{token, value: name_value} = name {
[INFO] [stderr] 27 |     env.insert(name_value, val);
[INFO] [stderr] 28 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: the `return_value:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:38:48
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 StatementKind::ReturnStatement{return_value: return_value, ..} => {
[INFO] [stderr]    |                                                -------------^^^^^^^^^^^^^
[INFO] [stderr]    |                                                |
[INFO] [stderr]    |                                                help: remove this
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_shorthand_field_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 | /                     match return_value {
[INFO] [stderr] 40 | |                         Some(return_val) => {
[INFO] [stderr] 41 | |                             let val = eval(NodeKind::StatementNode{statementKind: *return_val}, env);
[INFO] [stderr] 42 | |                             match is_error(val.clone()) {
[INFO] [stderr] ...  |
[INFO] [stderr] 50 | |                         None => {}
[INFO] [stderr] 51 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 39 |                     if let Some(return_val) = return_value {
[INFO] [stderr] 40 |     let val = eval(NodeKind::StatementNode{statementKind: *return_val}, env);
[INFO] [stderr] 41 |     match is_error(val.clone()) {
[INFO] [stderr] 42 |         true => {
[INFO] [stderr] 43 |             return val.clone();
[INFO] [stderr] 44 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]   --> src/evaluator.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 | /                             match is_error(val.clone()) {
[INFO] [stderr] 43 | |                                 true => {
[INFO] [stderr] 44 | |                                     return val.clone();
[INFO] [stderr] 45 | |                                 },
[INFO] [stderr] 46 | |                                 _ => {}
[INFO] [stderr] 47 | |                             }
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]    |
[INFO] [stderr] 42 |                             if is_error(val.clone()) {
[INFO] [stderr] 43 |     return val.clone();
[INFO] [stderr] 44 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressionKind` should have a snake case name such as `expression_kind`
[INFO] [stderr]   --> src/evaluator.rs:72:34
[INFO] [stderr]    |
[INFO] [stderr] 72 |         NodeKind::ExpressionNode{expressionKind} => {
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/evaluator.rs:78:21
[INFO] [stderr]    |
[INFO] [stderr] 78 | /                     match right {
[INFO] [stderr] 79 | |                         Some(r) => {
[INFO] [stderr] 80 | |                             let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 81 | |                             match eval_right {
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |                         _ => {}
[INFO] [stderr] 91 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 78 |                     if let Some(r) = right {
[INFO] [stderr] 79 |     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 80 |     match eval_right {
[INFO] [stderr] 81 |         ObjectKind::Error{..} => {
[INFO] [stderr] 82 |             return eval_right;
[INFO] [stderr] 83 |         },
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: the `operator:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:49
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                 ---------^^^^^^^^^
[INFO] [stderr]    |                                                 |
[INFO] [stderr]    |                                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `left:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:69
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                                     -----^^^^^
[INFO] [stderr]    |                                                                     |
[INFO] [stderr]    |                                                                     help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `right:` in this pattern is redundant
[INFO] [stderr]   --> src/evaluator.rs:94:81
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 ExpressionKind::InfixExpression{operator: operator, left: left, right: right, ..} => {
[INFO] [stderr]    |                                                                                 ------^^^^^^
[INFO] [stderr]    |                                                                                 |
[INFO] [stderr]    |                                                                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:95:21
[INFO] [stderr]     |
[INFO] [stderr] 95  | /                     match left {
[INFO] [stderr] 96  | |                         Some(l) => {
[INFO] [stderr] 97  | |                             let eval_left = eval(NodeKind::ExpressionNode{expressionKind: *l}, env);
[INFO] [stderr] 98  | |                             match is_error(eval_left.clone()) {
[INFO] [stderr] ...   |
[INFO] [stderr] 118 | |                         _ => {}
[INFO] [stderr] 119 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 95  |                     if let Some(l) = left {
[INFO] [stderr] 96  |     let eval_left = eval(NodeKind::ExpressionNode{expressionKind: *l}, env);
[INFO] [stderr] 97  |     match is_error(eval_left.clone()) {
[INFO] [stderr] 98  |         true => {
[INFO] [stderr] 99  |             return eval_left.clone();
[INFO] [stderr] 100 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:98:29
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                             match is_error(eval_left.clone()) {
[INFO] [stderr] 99  | |                                 true => {
[INFO] [stderr] 100 | |                                     return eval_left.clone();
[INFO] [stderr] 101 | |                                 },
[INFO] [stderr] 102 | |                                 _ => {}
[INFO] [stderr] 103 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 98  |                             if is_error(eval_left.clone()) {
[INFO] [stderr] 99  |     return eval_left.clone();
[INFO] [stderr] 100 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:104:29
[INFO] [stderr]     |
[INFO] [stderr] 104 | /                             match right {
[INFO] [stderr] 105 | |                                 Some(r) => {
[INFO] [stderr] 106 | |                                     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 107 | |                                     match is_error(eval_right.clone()) {
[INFO] [stderr] ...   |
[INFO] [stderr] 115 | |                                 _ => {}
[INFO] [stderr] 116 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 104 |                             if let Some(r) = right {
[INFO] [stderr] 105 |     let eval_right = eval(NodeKind::ExpressionNode{expressionKind: *r}, env);
[INFO] [stderr] 106 |     match is_error(eval_right.clone()) {
[INFO] [stderr] 107 |         true => {
[INFO] [stderr] 108 |             return eval_right.clone();
[INFO] [stderr] 109 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:107:37
[INFO] [stderr]     |
[INFO] [stderr] 107 | /                                     match is_error(eval_right.clone()) {
[INFO] [stderr] 108 | |                                         true => {
[INFO] [stderr] 109 | |                                             return eval_right.clone();
[INFO] [stderr] 110 | |                                         },
[INFO] [stderr] 111 | |                                         _ => {}
[INFO] [stderr] 112 | |                                     }
[INFO] [stderr]     | |_____________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 107 |                                     if is_error(eval_right.clone()) {
[INFO] [stderr] 108 |     return eval_right.clone();
[INFO] [stderr] 109 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `function:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:130:48
[INFO] [stderr]     |
[INFO] [stderr] 130 |                 ExpressionKind::CallExpression{function: function, arguments, ..} => {
[INFO] [stderr]     |                                                ---------^^^^^^^^^
[INFO] [stderr]     |                                                |
[INFO] [stderr]     |                                                help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:134:21
[INFO] [stderr]     |
[INFO] [stderr] 134 | /                     match args.len() == 1 {
[INFO] [stderr] 135 | |                         true => {
[INFO] [stderr] 136 | |                             match args.get(0) {
[INFO] [stderr] 137 | |                                 Some(arg) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 149 | |                         _ => {}
[INFO] [stderr] 150 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 134 |                     if args.len() == 1 {
[INFO] [stderr] 135 |     match args.get(0) {
[INFO] [stderr] 136 |         Some(arg) => {
[INFO] [stderr] 137 |             let first_arg = arg.clone();
[INFO] [stderr] 138 |             match is_error(first_arg) {
[INFO] [stderr] 139 |                 true => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:136:29
[INFO] [stderr]     |
[INFO] [stderr] 136 | /                             match args.get(0) {
[INFO] [stderr] 137 | |                                 Some(arg) => {
[INFO] [stderr] 138 | |                                     let first_arg = arg.clone();
[INFO] [stderr] 139 | |                                     match is_error(first_arg) {
[INFO] [stderr] ...   |
[INFO] [stderr] 146 | |                                 _ => {}
[INFO] [stderr] 147 | |                             }
[INFO] [stderr]     | |_____________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 136 |                             if let Some(arg) = args.get(0) {
[INFO] [stderr] 137 |     let first_arg = arg.clone();
[INFO] [stderr] 138 |     match is_error(first_arg) {
[INFO] [stderr] 139 |         true => {
[INFO] [stderr] 140 |             return arg.clone();
[INFO] [stderr] 141 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:139:37
[INFO] [stderr]     |
[INFO] [stderr] 139 | /                                     match is_error(first_arg) {
[INFO] [stderr] 140 | |                                         true => {
[INFO] [stderr] 141 | |                                             return arg.clone();
[INFO] [stderr] 142 | |                                         },
[INFO] [stderr] 143 | |                                         _ => {}
[INFO] [stderr] 144 | |                                     }
[INFO] [stderr]     | |_____________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 139 |                                     if is_error(first_arg) {
[INFO] [stderr] 140 |     return arg.clone();
[INFO] [stderr] 141 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:153:47
[INFO] [stderr]     |
[INFO] [stderr] 153 |                 ExpressionKind::StringLiteral{value: value, ..} => {
[INFO] [stderr]     |                                               ------^^^^^^
[INFO] [stderr]     |                                               |
[INFO] [stderr]     |                                               help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: variable `sNode` should have a snake case name such as `s_node`
[INFO] [stderr]    --> src/evaluator.rs:174:13
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let sNode = NodeKind::StatementNode{statementKind: s};
[INFO] [stderr]     |             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:206:13
[INFO] [stderr]     |
[INFO] [stderr] 206 | /             match right {
[INFO] [stderr] 207 | |                 ObjectKind::Integer{..} => {
[INFO] [stderr] 208 | |                     return eval_integer_infix_expression(operator, left, right);
[INFO] [stderr] 209 | |                 },
[INFO] [stderr] 210 | |                 _ => {}
[INFO] [stderr] 211 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 206 |             if let ObjectKind::Integer{..} = right {
[INFO] [stderr] 207 |     return eval_integer_infix_expression(operator, left, right);
[INFO] [stderr] 208 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 | /             match right {
[INFO] [stderr] 215 | |                 ObjectKind::Boolean{value: r_value} => {
[INFO] [stderr] 216 | |                     match operator.as_ref() {
[INFO] [stderr] 217 | |                         "==" => {
[INFO] [stderr] ...   |
[INFO] [stderr] 226 | |                 _ => {}
[INFO] [stderr] 227 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 214 |             if let ObjectKind::Boolean{value: r_value} = right {
[INFO] [stderr] 215 |     match operator.as_ref() {
[INFO] [stderr] 216 |         "==" => {
[INFO] [stderr] 217 |             return native_bool_to_boolean_object(l_value == r_value);
[INFO] [stderr] 218 |         },
[INFO] [stderr] 219 |         "!=" => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:231:13
[INFO] [stderr]     |
[INFO] [stderr] 231 | /             match left_clone.variant_eq(&right) {
[INFO] [stderr] 232 | |                 true => {
[INFO] [stderr] 233 | |                     return eval_string_infix_expression(operator, left.clone(), right)
[INFO] [stderr] 234 | |                 },
[INFO] [stderr] 235 | |                 _ => {}
[INFO] [stderr] 236 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 231 |             if left_clone.variant_eq(&right) {
[INFO] [stderr] 232 |     return eval_string_infix_expression(operator, left.clone(), right)
[INFO] [stderr] 233 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:240:5
[INFO] [stderr]     |
[INFO] [stderr] 240 | /     match left.variant_eq(&right) {
[INFO] [stderr] 241 | |         false => {
[INFO] [stderr] 242 | |             panic!("infix operator not valid for types");
[INFO] [stderr] 243 | |         },
[INFO] [stderr] 244 | |         _ => {}
[INFO] [stderr] 245 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 240 |     if !left.variant_eq(&right) {
[INFO] [stderr] 241 |     panic!("infix operator not valid for types");
[INFO] [stderr] 242 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:270:5
[INFO] [stderr]     |
[INFO] [stderr] 270 | /     match block {
[INFO] [stderr] 271 | |         StatementKind::BlockStatement{statements: statements, ..} => {
[INFO] [stderr] 272 | |             for statement in statements {
[INFO] [stderr] 273 | |                 result = eval(NodeKind::StatementNode{statementKind:*statement}, env);
[INFO] [stderr] ...   |
[INFO] [stderr] 282 | |         _ => {}
[INFO] [stderr] 283 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 270 |     if let StatementKind::BlockStatement{statements: statements, ..} = block {
[INFO] [stderr] 271 |     for statement in statements {
[INFO] [stderr] 272 |         result = eval(NodeKind::StatementNode{statementKind:*statement}, env);
[INFO] [stderr] 273 |         match result {
[INFO] [stderr] 274 |             ObjectKind::ReturnValue{..} | ObjectKind::Error{..} => {
[INFO] [stderr] 275 |                 return result.clone();
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: the `statements:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:271:39
[INFO] [stderr]     |
[INFO] [stderr] 271 |         StatementKind::BlockStatement{statements: statements, ..} => {
[INFO] [stderr]     |                                       -----------^^^^^^^^^^^
[INFO] [stderr]     |                                       |
[INFO] [stderr]     |                                       help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:315:5
[INFO] [stderr]     |
[INFO] [stderr] 315 | /     match left {
[INFO] [stderr] 316 | |         ObjectKind::Integer{slots: lslots, value: lvalue} => {
[INFO] [stderr] 317 | |             match right {
[INFO] [stderr] 318 | |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] ...   |
[INFO] [stderr] 353 | |         _ => {}
[INFO] [stderr] 354 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 315 |     if let ObjectKind::Integer{slots: lslots, value: lvalue} = left {
[INFO] [stderr] 316 |     match right {
[INFO] [stderr] 317 |         ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] 318 |             match operator.as_ref() {
[INFO] [stderr] 319 |                 "+" => {   
[INFO] [stderr] 320 |                     return ObjectKind::Integer{slots: HashMap::new(), value: lvalue + rvalue};
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:317:13
[INFO] [stderr]     |
[INFO] [stderr] 317 | /             match right {
[INFO] [stderr] 318 | |                 ObjectKind::Integer{slots: rslots, value: rvalue} => {
[INFO] [stderr] 319 | |                     match operator.as_ref() {
[INFO] [stderr] 320 | |                         "+" => {   
[INFO] [stderr] ...   |
[INFO] [stderr] 350 | |                 _ => {}
[INFO] [stderr] 351 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 317 |             if let ObjectKind::Integer{slots: rslots, value: rvalue} = right {
[INFO] [stderr] 318 |     match operator.as_ref() {
[INFO] [stderr] 319 |         "+" => {   
[INFO] [stderr] 320 |             return ObjectKind::Integer{slots: HashMap::new(), value: lvalue + rvalue};
[INFO] [stderr] 321 |         },
[INFO] [stderr] 322 |         "-" => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     match ie {
[INFO] [stderr] 360 | |         ExpressionKind::IfExpression{token, condition, consequence, alternative} => {
[INFO] [stderr] 361 | |             match condition {
[INFO] [stderr] 362 | |                 Some(c) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 390 | |         _ => {}
[INFO] [stderr] 391 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 359 |     if let ExpressionKind::IfExpression{token, condition, consequence, alternative} = ie {
[INFO] [stderr] 360 |     match condition {
[INFO] [stderr] 361 |         Some(c) => {
[INFO] [stderr] 362 |             let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 363 |             match evaluated_condition {
[INFO] [stderr] 364 |                 ObjectKind::Error{..} => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:361:13
[INFO] [stderr]     |
[INFO] [stderr] 361 | /             match condition {
[INFO] [stderr] 362 | |                 Some(c) => {
[INFO] [stderr] 363 | |                     let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 364 | |                     match evaluated_condition {
[INFO] [stderr] ...   |
[INFO] [stderr] 387 | |                 _ => {}
[INFO] [stderr] 388 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 361 |             if let Some(c) = condition {
[INFO] [stderr] 362 |     let evaluated_condition = eval(NodeKind::ExpressionNode{expressionKind:*c}, env);
[INFO] [stderr] 363 |     match evaluated_condition {
[INFO] [stderr] 364 |         ObjectKind::Error{..} => {
[INFO] [stderr] 365 |             return evaluated_condition;
[INFO] [stderr] 366 |         },
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:370:33
[INFO] [stderr]     |
[INFO] [stderr] 370 | /                                 match consequence {
[INFO] [stderr] 371 | |                                     Some(con) => {
[INFO] [stderr] 372 | |                                         return eval(NodeKind::StatementNode{statementKind:*con}, env);
[INFO] [stderr] 373 | |                                     },
[INFO] [stderr] 374 | |                                     _ => {}
[INFO] [stderr] 375 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 370 |                                 if let Some(con) = consequence {
[INFO] [stderr] 371 |     return eval(NodeKind::StatementNode{statementKind:*con}, env);
[INFO] [stderr] 372 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:377:33
[INFO] [stderr]     |
[INFO] [stderr] 377 | /                                 match alternative {
[INFO] [stderr] 378 | |                                     Some(alt) => {
[INFO] [stderr] 379 | |                                         return eval(NodeKind::StatementNode{statementKind:*alt}, env);
[INFO] [stderr] 380 | |                                     },
[INFO] [stderr] 381 | |                                     _ => {}
[INFO] [stderr] 382 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 377 |                                 if let Some(alt) = alternative {
[INFO] [stderr] 378 |     return eval(NodeKind::StatementNode{statementKind:*alt}, env);
[INFO] [stderr] 379 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `expressioNode` should have a snake case name such as `expressio_node`
[INFO] [stderr]    --> src/evaluator.rs:417:13
[INFO] [stderr]     |
[INFO] [stderr] 417 |         let expressioNode = NodeKind::ExpressionNode{expressionKind: *e};
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:419:3
[INFO] [stderr]     |
[INFO] [stderr] 419 |           match evaluated {
[INFO] [stderr]     |  _________^
[INFO] [stderr] 420 | |             ObjectKind::Error{..} => {
[INFO] [stderr] 421 | |                 panic!("not implmented");
[INFO] [stderr] 422 | |             },
[INFO] [stderr] 423 | |             _ => {}
[INFO] [stderr] 424 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 419 |         if let ObjectKind::Error{..} = evaluated {
[INFO] [stderr] 420 |     panic!("not implmented");
[INFO] [stderr] 421 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the `parameters:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                              -----------^^^^^^^^^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `body:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:54
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                                                      -----^^^^^
[INFO] [stderr]     |                                                      |
[INFO] [stderr]     |                                                      help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `env:` in this pattern is redundant
[INFO] [stderr]    --> src/evaluator.rs:432:66
[INFO] [stderr]     |
[INFO] [stderr] 432 |         ObjectKind::Function{parameters: parameters, body: body, env: env, ..} => {
[INFO] [stderr]     |                                                                  ----^^^^
[INFO] [stderr]     |                                                                  |
[INFO] [stderr]     |                                                                  help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:448:9
[INFO] [stderr]     |
[INFO] [stderr] 448 | /         match param {
[INFO] [stderr] 449 | |             ExpressionKind::Identifier{token, value} => {
[INFO] [stderr] 450 | |                 match args.get(param_index) {
[INFO] [stderr] 451 | |                     Some(arg) => {
[INFO] [stderr] ...   |
[INFO] [stderr] 457 | |             _ => {}
[INFO] [stderr] 458 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 448 |         if let ExpressionKind::Identifier{token, value} = param {
[INFO] [stderr] 449 |     match args.get(param_index) {
[INFO] [stderr] 450 |         Some(arg) => {
[INFO] [stderr] 451 |             closure.insert(value, arg.clone());
[INFO] [stderr] 452 |         },
[INFO] [stderr] 453 |         _ => {}
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/evaluator.rs:450:17
[INFO] [stderr]     |
[INFO] [stderr] 450 | /                 match args.get(param_index) {
[INFO] [stderr] 451 | |                     Some(arg) => {
[INFO] [stderr] 452 | |                         closure.insert(value, arg.clone());
[INFO] [stderr] 453 | |                     },
[INFO] [stderr] 454 | |                     _ => {}
[INFO] [stderr] 455 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 450 |                 if let Some(arg) = args.get(param_index) {
[INFO] [stderr] 451 |     closure.insert(value, arg.clone());
[INFO] [stderr] 452 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/evaluator.rs:459:9
[INFO] [stderr]     |
[INFO] [stderr] 459 |         param_index = param_index + 1;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `param_index += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to match on a boolean expression
[INFO] [stderr]    --> src/evaluator.rs:476:5
[INFO] [stderr]     |
[INFO] [stderr] 476 | /     match operator != "+" {
[INFO] [stderr] 477 | |         true => {
[INFO] [stderr] 478 | |             return ObjectKind::Error{message: String::from("not a valid operator.")};
[INFO] [stderr] 479 | |         },
[INFO] [stderr] 480 | |         _ => {}
[INFO] [stderr] 481 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_bool
[INFO] [stderr] help: consider using an if/else expression
[INFO] [stderr]     |
[INFO] [stderr] 476 |     if operator != "+" {
[INFO] [stderr] 477 |     return ObjectKind::Error{message: String::from("not a valid operator.")};
[INFO] [stderr] 478 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:179:13
[INFO] [stderr]     |
[INFO] [stderr] 179 | /             match stmt {
[INFO] [stderr] 180 | |                 Some(x) => {
[INFO] [stderr] 181 | |                     stmt_vec.push(*x);
[INFO] [stderr] 182 | |                 },
[INFO] [stderr] 183 | |                 None => {}
[INFO] [stderr] 184 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 179 |             if let Some(x) = stmt {
[INFO] [stderr] 180 |     stmt_vec.push(*x);
[INFO] [stderr] 181 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/parser.rs:214:19
[INFO] [stderr]     |
[INFO] [stderr] 214 |           let msg = String::from(format!("expected next token to be {}, got {} instead",
[INFO] [stderr]     |  ___________________^
[INFO] [stderr] 215 | |         t.name, token.t_type.name));
[INFO] [stderr]     | |___________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] help: consider removing `String::from()`
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let msg = format!("expected next token to be {}, got {} instead",
[INFO] [stderr] 215 |         t.name, token.t_type.name);
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/parser.rs:394:9
[INFO] [stderr]     |
[INFO] [stderr] 394 | /         let mut alternative = None;
[INFO] [stderr] 395 | |         if self.peek_token_is(token::ELSE) {
[INFO] [stderr] 396 | |             self.next_token();
[INFO] [stderr] 397 | |             if !self.expect_peek(token::LBRACE) {
[INFO] [stderr] ...   |
[INFO] [stderr] 400 | |             alternative = self.parse_block_statement();
[INFO] [stderr] 401 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let <mut> alternative = if self.peek_token_is(token::ELSE) { ..; self.parse_block_statement() } else { None };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = note: you might not need `mut` at all
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/parser.rs:411:13
[INFO] [stderr]     |
[INFO] [stderr] 411 | /             match stmt {
[INFO] [stderr] 412 | |                 Some(x) => {
[INFO] [stderr] 413 | |                     statements.push(x);
[INFO] [stderr] 414 | |                 },
[INFO] [stderr] 415 | |                 None => {}
[INFO] [stderr] 416 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 411 |             if let Some(x) = stmt {
[INFO] [stderr] 412 |     statements.push(x);
[INFO] [stderr] 413 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: variable `argsUnwrapped` should have a snake case name such as `args_unwrapped`
[INFO] [stderr]    --> src/parser.rs:471:26
[INFO] [stderr]     |
[INFO] [stderr] 471 |                     Some(argsUnwrapped) => {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/object.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Function{slots: HashMap<String, ObjectKind>, parameters: Vec<ExpressionKind>, body: StatementKind, env: Environment},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/object.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Function{slots: HashMap<String, ObjectKind>, parameters: Vec<ExpressionKind>, body: StatementKind, env: Environment},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:75:33
[INFO] [stderr]    |
[INFO] [stderr] 75 |             ObjectKind::Integer{value: value, ..} => {
[INFO] [stderr]    |                                 ------^^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `message:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:78:31
[INFO] [stderr]    |
[INFO] [stderr] 78 |             ObjectKind::Error{message: message, ..} => {
[INFO] [stderr]    |                               --------^^^^^^^^
[INFO] [stderr]    |                               |
[INFO] [stderr]    |                               help: remove this
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]   --> src/object.rs:84:35
[INFO] [stderr]    |
[INFO] [stderr] 84 |             ObjectKind::StringObj{value: value, ..} => {
[INFO] [stderr]    |                                   ------^^^^^^
[INFO] [stderr]    |                                   |
[INFO] [stderr]    |                                   help: remove this
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `"docker" "inspect" "0485833c0715d4f57c76c0ffd0c84fd0cc20ffba31838656172296024f015060"`
[INFO] running `"docker" "rm" "-f" "0485833c0715d4f57c76c0ffd0c84fd0cc20ffba31838656172296024f015060"`
[INFO] [stdout] 0485833c0715d4f57c76c0ffd0c84fd0cc20ffba31838656172296024f015060