[INFO] updating cached repository veekxt/xt_lang
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/veekxt/xt_lang
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/veekxt/xt_lang" "work/ex/clippy-test-run/sources/stable/gh/veekxt/xt_lang"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/veekxt/xt_lang'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/veekxt/xt_lang" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/veekxt/xt_lang"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/veekxt/xt_lang'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0dcfb70820a5a3c2e4c31d95c89184ae0af1395d
[INFO] sha for GitHub repo veekxt/xt_lang: 0dcfb70820a5a3c2e4c31d95c89184ae0af1395d
[INFO] validating manifest of veekxt/xt_lang 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 veekxt/xt_lang 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 veekxt/xt_lang
[INFO] finished frobbing veekxt/xt_lang
[INFO] frobbed toml for veekxt/xt_lang written to work/ex/clippy-test-run/sources/stable/gh/veekxt/xt_lang/Cargo.toml
[INFO] started frobbing veekxt/xt_lang
[INFO] finished frobbing veekxt/xt_lang
[INFO] frobbed toml for veekxt/xt_lang written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/veekxt/xt_lang/Cargo.toml
[INFO] crate veekxt/xt_lang 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 veekxt/xt_lang against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/veekxt/xt_lang:/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 -Dclippy::into_iter_on_array" "-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] 777e98646d0e5468f7c4d58fc5f862f671380f901df789a23f3c15c3388302bf
[INFO] running `"docker" "start" "-a" "777e98646d0e5468f7c4d58fc5f862f671380f901df789a23f3c15c3388302bf"`
[INFO] [stderr]     Checking xt_lang v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/lexer.rs:89:26
[INFO] [stderr]    |
[INFO] [stderr] 89 |             Token::LF => write!(f, "\\n"),
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:270:25
[INFO] [stderr]     |
[INFO] [stderr] 270 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::print_with_newline)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:274:25
[INFO] [stderr]     |
[INFO] [stderr] 274 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:276:25
[INFO] [stderr]     |
[INFO] [stderr] 276 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/lexer.rs:89:26
[INFO] [stderr]    |
[INFO] [stderr] 89 |             Token::LF => write!(f, "\\n"),
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:270:25
[INFO] [stderr]     |
[INFO] [stderr] 270 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::print_with_newline)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:274:25
[INFO] [stderr]     |
[INFO] [stderr] 274 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `print!()` with a format string that ends in a single newline, consider using `println!()` instead
[INFO] [stderr]    --> src/parser.rs:276:25
[INFO] [stderr]     |
[INFO] [stderr] 276 |                         print!("\n");
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/parser.rs:294:1
[INFO] [stderr]     |
[INFO] [stderr] 294 | / macro_rules! err_return2 {
[INFO] [stderr] 295 | |     ($fn_exp:expr) => (
[INFO] [stderr] 296 | |         match $fn_exp {
[INFO] [stderr] 297 | |             AST::ERR(s,line) => { return AST::ERR(s,line); },
[INFO] [stderr] ...   |
[INFO] [stderr] 300 | |     )
[INFO] [stderr] 301 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:574:21
[INFO] [stderr]     |
[INFO] [stderr] 574 |                     return AST::ERR("stmt-block has some error".to_string(), 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `AST::ERR("stmt-block has some error".to_string(), 0)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashSet`
[INFO] [stderr]  --> src/xt_type.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::collections::HashSet;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/parser.rs:294:1
[INFO] [stderr]     |
[INFO] [stderr] 294 | / macro_rules! err_return2 {
[INFO] [stderr] 295 | |     ($fn_exp:expr) => (
[INFO] [stderr] 296 | |         match $fn_exp {
[INFO] [stderr] 297 | |             AST::ERR(s,line) => { return AST::ERR(s,line); },
[INFO] [stderr] ...   |
[INFO] [stderr] 300 | |     )
[INFO] [stderr] 301 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/parser.rs:574:21
[INFO] [stderr]     |
[INFO] [stderr] 574 |                     return AST::ERR("stmt-block has some error".to_string(), 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `AST::ERR("stmt-block has some error".to_string(), 0)`
[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: unused import: `std::collections::HashSet`
[INFO] [stderr]  --> src/xt_type.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::collections::HashSet;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/parser.rs:573:21
[INFO] [stderr]     |
[INFO] [stderr] 573 |                 Err(err) => {
[INFO] [stderr]     |                     ^^^ help: consider using `_err` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/xt_type.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn new_int(i: i64) -> Box<XtValue> {
[INFO] [stderr]    |                ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/xt_type.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn new_bool(i: bool) -> Box<XtValue> {
[INFO] [stderr]    |                 ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]   --> src/main.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |                 Err(err) => {}
[INFO] [stderr]    |                     ^^^ help: consider using `_err` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]    --> src/parser.rs:573:21
[INFO] [stderr]     |
[INFO] [stderr] 573 |                 Err(err) => {
[INFO] [stderr]     |                     ^^^ help: consider using `_err` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/xt_type.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn new_int(i: i64) -> Box<XtValue> {
[INFO] [stderr]    |                ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/xt_type.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn new_bool(i: bool) -> Box<XtValue> {
[INFO] [stderr]    |                 ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `err`
[INFO] [stderr]   --> src/main.rs:31:21
[INFO] [stderr]    |
[INFO] [stderr] 31 |                 Err(err) => {}
[INFO] [stderr]    |                     ^^^ help: consider using `_err` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/xt_type.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut val = XtValue {
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/xt_type.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let mut val = XtValue {
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `in_if`
[INFO] [stderr]    --> src/parser.rs:483:5
[INFO] [stderr]     |
[INFO] [stderr] 483 |     in_if: isize,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `err`
[INFO] [stderr]    --> src/parser.rs:487:5
[INFO] [stderr]     |
[INFO] [stderr] 487 |     err: bool,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RETURN`
[INFO] [stderr]   --> src/run.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     RETURN(XtValue),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BREAK`
[INFO] [stderr]   --> src/run.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     BREAK,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CONTINUE`
[INFO] [stderr]   --> src/run.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     CONTINUE,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]  --> src/xt_type.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     name: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SysFunction`
[INFO] [stderr]   --> src/xt_type.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     SysFunction(fn(&XtValue) -> ()),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DefFunction`
[INFO] [stderr]   --> src/xt_type.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     DefFunction(Box<AST>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_bool`
[INFO] [stderr]   --> src/xt_type.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn new_bool(i: bool) -> Box<XtValue> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:189:9
[INFO] [stderr]     |
[INFO] [stderr] 189 | /         loop {
[INFO] [stderr] 190 | |             if let Some(now) = self.now_char() {
[INFO] [stderr] 191 | |                 if now == '\r'
[INFO] [stderr] 192 | |                     || now == ' '
[INFO] [stderr] ...   |
[INFO] [stderr] 211 | |             }
[INFO] [stderr] 212 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(now) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 33
[INFO] [stderr]    --> src/lexer.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 | /     fn next(&mut self) -> (Option<Token>, usize) {
[INFO] [stderr] 216 | |         let rs: Option<Token>;
[INFO] [stderr] 217 | |         self.goto_useful();
[INFO] [stderr] 218 | |         let mut tmp_str = String::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 394 | |         (rs, self.line)
[INFO] [stderr] 395 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:225:21
[INFO] [stderr]     |
[INFO] [stderr] 225 | /                     loop {
[INFO] [stderr] 226 | |                         match self.now_char() {
[INFO] [stderr] 227 | |                             Some(c2) => {
[INFO] [stderr] 228 | |                                 if is_iden(c2) {
[INFO] [stderr] ...   |
[INFO] [stderr] 234 | |                         }
[INFO] [stderr] 235 | |                     }
[INFO] [stderr]     | |_____________________^ help: try: `while let Some(c2) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:249:21
[INFO] [stderr]     |
[INFO] [stderr] 249 | /                     loop {
[INFO] [stderr] 250 | |                         match self.now_char() {
[INFO] [stderr] 251 | |                             Some(c2) => {
[INFO] [stderr] 252 | |                                 if is_num(c2) {
[INFO] [stderr] ...   |
[INFO] [stderr] 272 | |                         }
[INFO] [stderr] 273 | |                     }
[INFO] [stderr]     | |_____________________^ help: try: `while let Some(c2) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/lexer.rs:255:56
[INFO] [stderr]     |
[INFO] [stderr] 255 |                                 } else if c2 == '.' && is_float == false {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!is_float`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against true are unnecessary
[INFO] [stderr]    --> src/lexer.rs:274:29
[INFO] [stderr]     |
[INFO] [stderr] 274 |                     rs = if is_float == true { Some(Token::FLOAT(f64::from_str(tmp_str.as_ref()).unwrap())) } else { Some(Token::INT(isize::from_str(tmp_str.as_ref()).unwrap())) }
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `is_float`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/xt_type.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut val = XtValue {
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/xt_type.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let mut val = XtValue {
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `in_if`
[INFO] [stderr]    --> src/parser.rs:483:5
[INFO] [stderr]     |
[INFO] [stderr] 483 |     in_if: isize,
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `err`
[INFO] [stderr]    --> src/parser.rs:487:5
[INFO] [stderr]     |
[INFO] [stderr] 487 |     err: bool,
[INFO] [stderr]     |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RETURN`
[INFO] [stderr]   --> src/run.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     RETURN(XtValue),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `BREAK`
[INFO] [stderr]   --> src/run.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     BREAK,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CONTINUE`
[INFO] [stderr]   --> src/run.rs:62:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     CONTINUE,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `name`
[INFO] [stderr]  --> src/xt_type.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     name: String,
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SysFunction`
[INFO] [stderr]   --> src/xt_type.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     SysFunction(fn(&XtValue) -> ()),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DefFunction`
[INFO] [stderr]   --> src/xt_type.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     DefFunction(Box<AST>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_bool`
[INFO] [stderr]   --> src/xt_type.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn new_bool(i: bool) -> Box<XtValue> {
[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/lexer.rs:444:17
[INFO] [stderr]     |
[INFO] [stderr] 444 | /                 match to {
[INFO] [stderr] 445 | |                     Token::ERR(ref s) => {
[INFO] [stderr] 446 | |                         err = true;
[INFO] [stderr] 447 | |                         println!("line {}:lexer error:{}", line, s);
[INFO] [stderr] 448 | |                     }
[INFO] [stderr] 449 | |                     _ => {}
[INFO] [stderr] 450 | |                 }
[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] 444 |                 if let Token::ERR(ref s) = to {
[INFO] [stderr] 445 |     err = true;
[INFO] [stderr] 446 |     println!("line {}:lexer error:{}", line, s);
[INFO] [stderr] 447 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:189:9
[INFO] [stderr]     |
[INFO] [stderr] 189 | /         loop {
[INFO] [stderr] 190 | |             if let Some(now) = self.now_char() {
[INFO] [stderr] 191 | |                 if now == '\r'
[INFO] [stderr] 192 | |                     || now == ' '
[INFO] [stderr] ...   |
[INFO] [stderr] 211 | |             }
[INFO] [stderr] 212 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(now) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 33
[INFO] [stderr]    --> src/lexer.rs:215:5
[INFO] [stderr]     |
[INFO] [stderr] 215 | /     fn next(&mut self) -> (Option<Token>, usize) {
[INFO] [stderr] 216 | |         let rs: Option<Token>;
[INFO] [stderr] 217 | |         self.goto_useful();
[INFO] [stderr] 218 | |         let mut tmp_str = String::new();
[INFO] [stderr] ...   |
[INFO] [stderr] 394 | |         (rs, self.line)
[INFO] [stderr] 395 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:225:21
[INFO] [stderr]     |
[INFO] [stderr] 225 | /                     loop {
[INFO] [stderr] 226 | |                         match self.now_char() {
[INFO] [stderr] 227 | |                             Some(c2) => {
[INFO] [stderr] 228 | |                                 if is_iden(c2) {
[INFO] [stderr] ...   |
[INFO] [stderr] 234 | |                         }
[INFO] [stderr] 235 | |                     }
[INFO] [stderr]     | |_____________________^ help: try: `while let Some(c2) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lexer.rs:249:21
[INFO] [stderr]     |
[INFO] [stderr] 249 | /                     loop {
[INFO] [stderr] 250 | |                         match self.now_char() {
[INFO] [stderr] 251 | |                             Some(c2) => {
[INFO] [stderr] 252 | |                                 if is_num(c2) {
[INFO] [stderr] ...   |
[INFO] [stderr] 272 | |                         }
[INFO] [stderr] 273 | |                     }
[INFO] [stderr]     | |_____________________^ help: try: `while let Some(c2) = self.now_char() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/lexer.rs:255:56
[INFO] [stderr]     |
[INFO] [stderr] 255 |                                 } else if c2 == '.' && is_float == false {
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!is_float`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: equality checks against true are unnecessary
[INFO] [stderr]    --> src/lexer.rs:274:29
[INFO] [stderr]     |
[INFO] [stderr] 274 |                     rs = if is_float == true { Some(Token::FLOAT(f64::from_str(tmp_str.as_ref()).unwrap())) } else { Some(Token::INT(isize::from_str(tmp_str.as_ref()).unwrap())) }
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `is_float`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[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/lexer.rs:444:17
[INFO] [stderr]     |
[INFO] [stderr] 444 | /                 match to {
[INFO] [stderr] 445 | |                     Token::ERR(ref s) => {
[INFO] [stderr] 446 | |                         err = true;
[INFO] [stderr] 447 | |                         println!("line {}:lexer error:{}", line, s);
[INFO] [stderr] 448 | |                     }
[INFO] [stderr] 449 | |                     _ => {}
[INFO] [stderr] 450 | |                 }
[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] 444 |                 if let Token::ERR(ref s) = to {
[INFO] [stderr] 445 |     err = true;
[INFO] [stderr] 446 |     println!("line {}:lexer error:{}", line, s);
[INFO] [stderr] 447 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 508 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 510 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[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:519:5
[INFO] [stderr]     |
[INFO] [stderr] 519 | /     match tokens.get(0, 0) {
[INFO] [stderr] 520 | |         Token::IDEN(_) => {
[INFO] [stderr] 521 | |             attrs.push(err_return!(a_iden(tokens)));
[INFO] [stderr] 522 | |             loop {
[INFO] [stderr] ...   |
[INFO] [stderr] 539 | |         _ => {}
[INFO] [stderr] 540 | |     }
[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] 519 |     if let Token::IDEN(_) = tokens.get(0, 0) {
[INFO] [stderr] 520 |     attrs.push(err_return!(a_iden(tokens)));
[INFO] [stderr] 521 |     loop {
[INFO] [stderr] 522 |         option!(tokens,Token::LF);
[INFO] [stderr] 523 |         match tokens.get(0, 0) {
[INFO] [stderr] 524 |             Token::COMMA => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 523 |                   option!(tokens,Token::LF);
[INFO] [stderr]     |                   -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 527 |                           option!(tokens,Token::LF);
[INFO] [stderr]     |                           -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[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:546:5
[INFO] [stderr]     |
[INFO] [stderr] 546 | /     match tokens.get(0, 0) {
[INFO] [stderr] 547 | |         Token::DEF => {
[INFO] [stderr] 548 | |             funs.push(err_return!(fn_def(tokens,&mut Status::new(false,0,0,0,0))));
[INFO] [stderr] 549 | |             loop {
[INFO] [stderr] ...   |
[INFO] [stderr] 559 | |         _ => {}
[INFO] [stderr] 560 | |     }
[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] 546 |     if let Token::DEF = tokens.get(0, 0) {
[INFO] [stderr] 547 |     funs.push(err_return!(fn_def(tokens,&mut Status::new(false,0,0,0,0))));
[INFO] [stderr] 548 |     loop {
[INFO] [stderr] 549 |         option!(tokens,Token::LF);
[INFO] [stderr] 550 |         match tokens.get(0, 0) {
[INFO] [stderr] 551 |             Token::DEF => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 550 |                   option!(tokens,Token::LF);
[INFO] [stderr]     |                   -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 565 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 570 |               option!(tokens,Token::LF);
[INFO] [stderr]     |               -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 578 |                       option!(tokens,Token::LF);
[INFO] [stderr]     |                       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 671 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 705 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 709 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 713 |               option!(tokens,Token::LF);
[INFO] [stderr]     |               -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 748 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:796:13
[INFO] [stderr]     |
[INFO] [stderr] 796 | /             loop {
[INFO] [stderr] 797 | |                 match tokens.get(0, 0) {
[INFO] [stderr] 798 | |                     Token::COMMA => {
[INFO] [stderr] 799 | |                         tokens.i += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 811 | |                 }
[INFO] [stderr] 812 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Token::COMMA = tokens.get(0, 0) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:852:13
[INFO] [stderr]     |
[INFO] [stderr] 852 | /             loop {
[INFO] [stderr] 853 | |                 match tokens.get(0, 0) {
[INFO] [stderr] 854 | |                     Token::COMMA => {
[INFO] [stderr] 855 | |                         tokens.i += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 867 | |                 }
[INFO] [stderr] 868 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Token::COMMA = tokens.get(0, 0) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 508 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 510 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[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:519:5
[INFO] [stderr]     |
[INFO] [stderr] 519 | /     match tokens.get(0, 0) {
[INFO] [stderr] 520 | |         Token::IDEN(_) => {
[INFO] [stderr] 521 | |             attrs.push(err_return!(a_iden(tokens)));
[INFO] [stderr] 522 | |             loop {
[INFO] [stderr] ...   |
[INFO] [stderr] 539 | |         _ => {}
[INFO] [stderr] 540 | |     }
[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] 519 |     if let Token::IDEN(_) = tokens.get(0, 0) {
[INFO] [stderr] 520 |     attrs.push(err_return!(a_iden(tokens)));
[INFO] [stderr] 521 |     loop {
[INFO] [stderr] 522 |         option!(tokens,Token::LF);
[INFO] [stderr] 523 |         match tokens.get(0, 0) {
[INFO] [stderr] 524 |             Token::COMMA => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 523 |                   option!(tokens,Token::LF);
[INFO] [stderr]     |                   -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 527 |                           option!(tokens,Token::LF);
[INFO] [stderr]     |                           -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[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:546:5
[INFO] [stderr]     |
[INFO] [stderr] 546 | /     match tokens.get(0, 0) {
[INFO] [stderr] 547 | |         Token::DEF => {
[INFO] [stderr] 548 | |             funs.push(err_return!(fn_def(tokens,&mut Status::new(false,0,0,0,0))));
[INFO] [stderr] 549 | |             loop {
[INFO] [stderr] ...   |
[INFO] [stderr] 559 | |         _ => {}
[INFO] [stderr] 560 | |     }
[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] 546 |     if let Token::DEF = tokens.get(0, 0) {
[INFO] [stderr] 547 |     funs.push(err_return!(fn_def(tokens,&mut Status::new(false,0,0,0,0))));
[INFO] [stderr] 548 |     loop {
[INFO] [stderr] 549 |         option!(tokens,Token::LF);
[INFO] [stderr] 550 |         match tokens.get(0, 0) {
[INFO] [stderr] 551 |             Token::DEF => {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 550 |                   option!(tokens,Token::LF);
[INFO] [stderr]     |                   -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:12:17
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn run_exp(ast: &Box<AST>) -> Box<XtValue> {
[INFO] [stderr]    |                 ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:66:41
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn run_var(context: &mut Context, iden: &Box<AST>, exp: &Box<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                         ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:66:57
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn run_var(context: &mut Context, iden: &Box<AST>, exp: &Box<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                                         ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/run.rs:88:46
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn run_stmt(context: &mut Context, ast_list: &Vec<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                              ^^^^^^^^^ help: change this to: `&[AST]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/run.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 | /         match ast {
[INFO] [stderr] 91 | |             &AST::VAR { ref iden, ref exp } => {
[INFO] [stderr] 92 | |                 run_var(context, iden, exp);
[INFO] [stderr] 93 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 97 | |             _ => {}
[INFO] [stderr] 98 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 90 |         match *ast {
[INFO] [stderr] 91 |             AST::VAR { ref iden, ref exp } => {
[INFO] [stderr] 92 |                 run_var(context, iden, exp);
[INFO] [stderr] 93 |             }
[INFO] [stderr] 94 |             AST::STMT(ref stmt) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/run.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 run_var(context, iden, exp);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/run.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 run_stmt(context,stmt);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/run.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |         run_stmt(&mut context, &ast_vec);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 565 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 570 |               option!(tokens,Token::LF);
[INFO] [stderr]     |               -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 578 |                       option!(tokens,Token::LF);
[INFO] [stderr]     |                       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 671 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:29:21
[INFO] [stderr]    |
[INFO] [stderr] 29 |                     run(ast);
[INFO] [stderr]    |                     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 705 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 709 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 713 |               option!(tokens,Token::LF);
[INFO] [stderr]     |               -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:314:9
[INFO] [stderr]     |
[INFO] [stderr] 314 | /         loop {
[INFO] [stderr] 315 | |             match $tokens.get(0,0) {
[INFO] [stderr] 316 | |                 $token => { $tokens.i+=1; },
[INFO] [stderr] 317 | |                 _ =>{break;},
[INFO] [stderr] 318 | |             }
[INFO] [stderr] 319 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Token::LF = $tokens.get(0,0) { .. }`
[INFO] [stderr] ...
[INFO] [stderr] 748 |       option!(tokens,Token::LF);
[INFO] [stderr]     |       -------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:796:13
[INFO] [stderr]     |
[INFO] [stderr] 796 | /             loop {
[INFO] [stderr] 797 | |                 match tokens.get(0, 0) {
[INFO] [stderr] 798 | |                     Token::COMMA => {
[INFO] [stderr] 799 | |                         tokens.i += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 811 | |                 }
[INFO] [stderr] 812 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Token::COMMA = tokens.get(0, 0) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/parser.rs:852:13
[INFO] [stderr]     |
[INFO] [stderr] 852 | /             loop {
[INFO] [stderr] 853 | |                 match tokens.get(0, 0) {
[INFO] [stderr] 854 | |                     Token::COMMA => {
[INFO] [stderr] 855 | |                         tokens.i += 1;
[INFO] [stderr] ...   |
[INFO] [stderr] 867 | |                 }
[INFO] [stderr] 868 | |             }
[INFO] [stderr]     | |_____________^ help: try: `while let Token::COMMA = tokens.get(0, 0) { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:12:17
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn run_exp(ast: &Box<AST>) -> Box<XtValue> {
[INFO] [stderr]    |                 ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:66:41
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn run_var(context: &mut Context, iden: &Box<AST>, exp: &Box<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                         ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/run.rs:66:57
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn run_var(context: &mut Context, iden: &Box<AST>, exp: &Box<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                                         ^^^^^^^^^ help: try: `&AST`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/run.rs:88:46
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn run_stmt(context: &mut Context, ast_list: &Vec<AST>) -> Result<StmtInfo, String> {
[INFO] [stderr]    |                                              ^^^^^^^^^ help: change this to: `&[AST]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/run.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 | /         match ast {
[INFO] [stderr] 91 | |             &AST::VAR { ref iden, ref exp } => {
[INFO] [stderr] 92 | |                 run_var(context, iden, exp);
[INFO] [stderr] 93 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 97 | |             _ => {}
[INFO] [stderr] 98 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 90 |         match *ast {
[INFO] [stderr] 91 |             AST::VAR { ref iden, ref exp } => {
[INFO] [stderr] 92 |                 run_var(context, iden, exp);
[INFO] [stderr] 93 |             }
[INFO] [stderr] 94 |             AST::STMT(ref stmt) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/run.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 run_var(context, iden, exp);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/run.rs:95:17
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 run_stmt(context,stmt);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/run.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |         run_stmt(&mut context, &ast_vec);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:29:21
[INFO] [stderr]    |
[INFO] [stderr] 29 |                     run(ast);
[INFO] [stderr]    |                     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `"docker" "inspect" "777e98646d0e5468f7c4d58fc5f862f671380f901df789a23f3c15c3388302bf"`
[INFO] running `"docker" "rm" "-f" "777e98646d0e5468f7c4d58fc5f862f671380f901df789a23f3c15c3388302bf"`
[INFO] [stdout] 777e98646d0e5468f7c4d58fc5f862f671380f901df789a23f3c15c3388302bf