mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-12-18 09:03:18 +00:00
569 lines
18 KiB
Text
569 lines
18 KiB
Text
error: for loop over `option`, which is an `Option`. This is more readably written as an `if let` statement.
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--> $DIR/for_loop.rs:17:31
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17 | #[clippy(author)]for x in option {
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| ^^^^^^
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= note: `-D for-loop-over-option` implied by `-D warnings`
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= help: consider replacing `for x in option` with `if let Some(x) = option`
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error: for loop over `result`, which is a `Result`. This is more readably written as an `if let` statement.
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--> $DIR/for_loop.rs:22:14
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22 | for x in result {
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| ^^^^^^
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= note: `-D for-loop-over-result` implied by `-D warnings`
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= help: consider replacing `for x in result` with `if let Ok(x) = result`
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error: for loop over `option.ok_or("x not found")`, which is a `Result`. This is more readably written as an `if let` statement.
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--> $DIR/for_loop.rs:26:14
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26 | for x in option.ok_or("x not found") {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: consider replacing `for x in option.ok_or("x not found")` with `if let Ok(x) = option.ok_or("x not found")`
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error: you are iterating over `Iterator::next()` which is an Option; this will compile but is probably not what you want
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--> $DIR/for_loop.rs:32:5
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32 | / for x in v.iter().next() {
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33 | | println!("{}", x);
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34 | | }
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| |_____^
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= note: `-D iter-next-loop` implied by `-D warnings`
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error: for loop over `v.iter().next().and(Some(0))`, which is an `Option`. This is more readably written as an `if let` statement.
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--> $DIR/for_loop.rs:37:14
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37 | for x in v.iter().next().and(Some(0)) {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: consider replacing `for x in v.iter().next().and(Some(0))` with `if let Some(x) = v.iter().next().and(Some(0))`
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error: for loop over `v.iter().next().ok_or("x not found")`, which is a `Result`. This is more readably written as an `if let` statement.
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--> $DIR/for_loop.rs:41:14
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41 | for x in v.iter().next().ok_or("x not found") {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: consider replacing `for x in v.iter().next().ok_or("x not found")` with `if let Ok(x) = v.iter().next().ok_or("x not found")`
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error: this loop never actually loops
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--> $DIR/for_loop.rs:53:5
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53 | / while let Some(x) = option {
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54 | | println!("{}", x);
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55 | | break;
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56 | | }
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| |_____^
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= note: `-D never-loop` implied by `-D warnings`
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error: this loop never actually loops
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--> $DIR/for_loop.rs:59:5
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59 | / while let Ok(x) = result {
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60 | | println!("{}", x);
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61 | | break;
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62 | | }
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| |_____^
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:86:5
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86 | / for i in 0..vec.len() {
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87 | | println!("{}", vec[i]);
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88 | | }
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| |_____^
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= note: `-D needless-range-loop` implied by `-D warnings`
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help: consider using an iterator
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86 | for <item> in &vec {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:95:5
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95 | / for i in 0..vec.len() {
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96 | | let _ = vec[i];
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97 | | }
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| |_____^
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help: consider using an iterator
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95 | for <item> in &vec {
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error: the loop variable `j` is only used to index `STATIC`.
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--> $DIR/for_loop.rs:100:5
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100 | / for j in 0..4 {
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101 | | println!("{:?}", STATIC[j]);
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102 | | }
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| |_____^
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help: consider using an iterator
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100 | for <item> in STATIC.iter().take(4) {
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error: the loop variable `j` is only used to index `CONST`.
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--> $DIR/for_loop.rs:104:5
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104 | / for j in 0..4 {
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105 | | println!("{:?}", CONST[j]);
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106 | | }
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| |_____^
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help: consider using an iterator
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104 | for <item> in CONST.iter().take(4) {
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error: the loop variable `i` is used to index `vec`
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--> $DIR/for_loop.rs:108:5
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108 | / for i in 0..vec.len() {
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109 | | println!("{} {}", vec[i], i);
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110 | | }
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| |_____^
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help: consider using an iterator
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108 | for (i, <item>) in vec.iter().enumerate() {
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error: the loop variable `i` is only used to index `vec2`.
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--> $DIR/for_loop.rs:116:5
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116 | / for i in 0..vec.len() {
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117 | | println!("{}", vec2[i]);
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118 | | }
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| |_____^
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help: consider using an iterator
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116 | for <item> in vec2.iter().take(vec.len()) {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:120:5
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120 | / for i in 5..vec.len() {
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121 | | println!("{}", vec[i]);
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122 | | }
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| |_____^
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help: consider using an iterator
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120 | for <item> in vec.iter().skip(5) {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:124:5
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124 | / for i in 0..MAX_LEN {
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125 | | println!("{}", vec[i]);
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126 | | }
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| |_____^
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help: consider using an iterator
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124 | for <item> in vec.iter().take(MAX_LEN) {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:128:5
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128 | / for i in 0..=MAX_LEN {
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129 | | println!("{}", vec[i]);
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130 | | }
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| |_____^
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help: consider using an iterator
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128 | for <item> in vec.iter().take(MAX_LEN + 1) {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:132:5
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132 | / for i in 5..10 {
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133 | | println!("{}", vec[i]);
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134 | | }
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| |_____^
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help: consider using an iterator
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132 | for <item> in vec.iter().take(10).skip(5) {
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error: the loop variable `i` is only used to index `vec`.
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--> $DIR/for_loop.rs:136:5
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136 | / for i in 5..=10 {
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137 | | println!("{}", vec[i]);
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138 | | }
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| |_____^
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help: consider using an iterator
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136 | for <item> in vec.iter().take(10 + 1).skip(5) {
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error: the loop variable `i` is used to index `vec`
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--> $DIR/for_loop.rs:140:5
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140 | / for i in 5..vec.len() {
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141 | | println!("{} {}", vec[i], i);
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142 | | }
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| |_____^
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help: consider using an iterator
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140 | for (i, <item>) in vec.iter().enumerate().skip(5) {
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error: the loop variable `i` is used to index `vec`
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--> $DIR/for_loop.rs:144:5
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144 | / for i in 5..10 {
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145 | | println!("{} {}", vec[i], i);
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146 | | }
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| |_____^
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help: consider using an iterator
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144 | for (i, <item>) in vec.iter().enumerate().take(10).skip(5) {
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:148:5
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148 | / for i in 10..0 {
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149 | | println!("{}", i);
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150 | | }
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| |_____^
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= note: `-D reverse-range-loop` implied by `-D warnings`
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help: consider using the following if you are attempting to iterate over this range in reverse
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148 | for i in (0..10).rev() {
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| ^^^^^^^^^^^^^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:152:5
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152 | / for i in 10..=0 {
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153 | | println!("{}", i);
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154 | | }
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| |_____^
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help: consider using the following if you are attempting to iterate over this range in reverse
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152 | for i in (0...10).rev() {
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| ^^^^^^^^^^^^^^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:156:5
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156 | / for i in MAX_LEN..0 {
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157 | | println!("{}", i);
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158 | | }
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| |_____^
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help: consider using the following if you are attempting to iterate over this range in reverse
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156 | for i in (0..MAX_LEN).rev() {
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| ^^^^^^^^^^^^^^^^^^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:160:5
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160 | / for i in 5..5 {
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161 | | println!("{}", i);
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162 | | }
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| |_____^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:185:5
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185 | / for i in 10..5 + 4 {
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186 | | println!("{}", i);
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187 | | }
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| |_____^
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help: consider using the following if you are attempting to iterate over this range in reverse
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185 | for i in (5 + 4..10).rev() {
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| ^^^^^^^^^^^^^^^^^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:189:5
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189 | / for i in (5 + 2)..(3 - 1) {
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190 | | println!("{}", i);
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191 | | }
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| |_____^
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help: consider using the following if you are attempting to iterate over this range in reverse
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189 | for i in ((3 - 1)..(5 + 2)).rev() {
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: this range is empty so this for loop will never run
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--> $DIR/for_loop.rs:193:5
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193 | / for i in (5 + 2)..(8 - 1) {
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194 | | println!("{}", i);
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195 | | }
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| |_____^
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:215:15
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215 | for _v in vec.iter() {}
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| ^^^^^^^^^^ help: to write this more concisely, try: `&vec`
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= note: `-D explicit-iter-loop` implied by `-D warnings`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:217:15
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217 | for _v in vec.iter_mut() {}
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| ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut vec`
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error: it is more idiomatic to loop over containers instead of using explicit iteration methods`
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--> $DIR/for_loop.rs:220:15
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220 | for _v in out_vec.into_iter() {}
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| ^^^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `out_vec`
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= note: `-D explicit-into-iter-loop` implied by `-D warnings`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:223:15
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223 | for _v in array.into_iter() {}
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| ^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&array`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:228:15
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228 | for _v in [1, 2, 3].iter() {}
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| ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[1, 2, 3]`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:232:15
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232 | for _v in [0; 32].iter() {}
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| ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[0; 32]`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:237:15
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237 | for _v in ll.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&ll`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:240:15
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240 | for _v in vd.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&vd`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:243:15
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243 | for _v in bh.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&bh`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:246:15
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246 | for _v in hm.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&hm`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:249:15
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249 | for _v in bt.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&bt`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:252:15
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252 | for _v in hs.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&hs`
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error: it is more idiomatic to loop over references to containers instead of using explicit iteration methods
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--> $DIR/for_loop.rs:255:15
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255 | for _v in bs.iter() {}
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| ^^^^^^^^^ help: to write this more concisely, try: `&bs`
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error: you are iterating over `Iterator::next()` which is an Option; this will compile but is probably not what you want
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--> $DIR/for_loop.rs:257:5
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257 | for _v in vec.iter().next() {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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error: you are collect()ing an iterator and throwing away the result. Consider using an explicit for loop to exhaust the iterator
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--> $DIR/for_loop.rs:264:5
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264 | vec.iter().cloned().map(|x| out.push(x)).collect::<Vec<_>>();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: `-D unused-collect` implied by `-D warnings`
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error: the variable `_index` is used as a loop counter. Consider using `for (_index, item) in &vec.enumerate()` or similar iterators
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--> $DIR/for_loop.rs:269:5
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269 | / for _v in &vec {
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270 | | _index += 1
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271 | | }
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| |_____^
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= note: `-D explicit-counter-loop` implied by `-D warnings`
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error: the variable `_index` is used as a loop counter. Consider using `for (_index, item) in &vec.enumerate()` or similar iterators
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--> $DIR/for_loop.rs:275:5
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275 | / for _v in &vec {
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276 | | _index += 1
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277 | | }
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| |_____^
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error: you seem to want to iterate on a map's values
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--> $DIR/for_loop.rs:385:5
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385 | / for (_, v) in &m {
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386 | | let _v = v;
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387 | | }
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| |_____^
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= note: `-D for-kv-map` implied by `-D warnings`
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help: use the corresponding method
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385 | for v in m.values() {
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error: you seem to want to iterate on a map's values
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--> $DIR/for_loop.rs:390:5
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390 | / for (_, v) in &*m {
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391 | | let _v = v;
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392 | | // Here the `*` is not actually necesarry, but the test tests that we don't
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393 | | // suggest
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394 | | // `in *m.values()` as we used to
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395 | | }
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| |_____^
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help: use the corresponding method
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390 | for v in (*m).values() {
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error: you seem to want to iterate on a map's values
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--> $DIR/for_loop.rs:398:5
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398 | / for (_, v) in &mut m {
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399 | | let _v = v;
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400 | | }
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| |_____^
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help: use the corresponding method
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398 | for v in m.values_mut() {
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error: you seem to want to iterate on a map's values
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--> $DIR/for_loop.rs:403:5
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403 | / for (_, v) in &mut *m {
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404 | | let _v = v;
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405 | | }
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| |_____^
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help: use the corresponding method
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403 | for v in (*m).values_mut() {
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error: you seem to want to iterate on a map's keys
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--> $DIR/for_loop.rs:409:5
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409 | / for (k, _value) in rm {
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410 | | let _k = k;
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411 | | }
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| |_____^
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help: use the corresponding method
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409 | for k in rm.keys() {
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:462:5
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462 | / for i in 0..src.len() {
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463 | | dst[i] = src[i];
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464 | | }
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| |_____^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..])`
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= note: `-D manual-memcpy` implied by `-D warnings`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:467:5
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467 | / for i in 0..src.len() {
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468 | | dst[i + 10] = src[i];
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469 | | }
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| |_____^ help: try replacing the loop by: `dst[10..(src.len() + 10)].clone_from_slice(&src[..])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:472:5
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472 | / for i in 0..src.len() {
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473 | | dst[i] = src[i + 10];
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474 | | }
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| |_____^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[10..])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:477:5
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477 | / for i in 11..src.len() {
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478 | | dst[i] = src[i - 10];
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479 | | }
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| |_____^ help: try replacing the loop by: `dst[11..src.len()].clone_from_slice(&src[(11 - 10)..(src.len() - 10)])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:482:5
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482 | / for i in 0..dst.len() {
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483 | | dst[i] = src[i];
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484 | | }
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| |_____^ help: try replacing the loop by: `dst.clone_from_slice(&src[..dst.len()])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:495:5
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495 | / for i in 10..256 {
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496 | | dst[i] = src[i - 5];
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497 | | dst2[i + 500] = src[i]
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498 | | }
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| |_____^
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help: try replacing the loop by
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495 | dst[10..256].clone_from_slice(&src[(10 - 5)..(256 - 5)])
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496 | dst2[(10 + 500)..(256 + 500)].clone_from_slice(&src[10..256])
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:507:5
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507 | / for i in 10..LOOP_OFFSET {
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508 | | dst[i + LOOP_OFFSET] = src[i - some_var];
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509 | | }
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| |_____^ help: try replacing the loop by: `dst[(10 + LOOP_OFFSET)..(LOOP_OFFSET + LOOP_OFFSET)].clone_from_slice(&src[(10 - some_var)..(LOOP_OFFSET - some_var)])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:520:5
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520 | / for i in 0..src_vec.len() {
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521 | | dst_vec[i] = src_vec[i];
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522 | | }
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| |_____^ help: try replacing the loop by: `dst_vec[..src_vec.len()].clone_from_slice(&src_vec[..])`
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error: it looks like you're manually copying between slices
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--> $DIR/for_loop.rs:547:5
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547 | / for i in 0..src.len() {
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548 | | dst[i] = src[i].clone();
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549 | | }
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| |_____^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..])`
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error: aborting due to 59 previous errors
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