error: for loop over `option`, which is an `Option`. This is more readably written as an `if let` statement. --> $DIR/for_loop.rs:27:14 | 27 | for x in option { | ^^^^^^ | = note: `-D clippy::for-loop-over-option` implied by `-D warnings` = help: consider replacing `for x in option` with `if let Some(x) = option` error: for loop over `result`, which is a `Result`. This is more readably written as an `if let` statement. --> $DIR/for_loop.rs:32:14 | 32 | for x in result { | ^^^^^^ | = note: `-D clippy::for-loop-over-result` implied by `-D warnings` = help: consider replacing `for x in result` with `if let Ok(x) = result` error: for loop over `option.ok_or("x not found")`, which is a `Result`. This is more readably written as an `if let` statement. --> $DIR/for_loop.rs:36:14 | 36 | for x in option.ok_or("x not found") { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: consider replacing `for x in option.ok_or("x not found")` with `if let Ok(x) = option.ok_or("x not found")` error: you are iterating over `Iterator::next()` which is an Option; this will compile but is probably not what you want --> $DIR/for_loop.rs:42:14 | 42 | for x in v.iter().next() { | ^^^^^^^^^^^^^^^ | = note: `-D clippy::iter-next-loop` implied by `-D warnings` error: for loop over `v.iter().next().and(Some(0))`, which is an `Option`. This is more readably written as an `if let` statement. --> $DIR/for_loop.rs:47:14 | 47 | for x in v.iter().next().and(Some(0)) { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: consider replacing `for x in v.iter().next().and(Some(0))` with `if let Some(x) = v.iter().next().and(Some(0))` 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. --> $DIR/for_loop.rs:51:14 | 51 | for x in v.iter().next().ok_or("x not found") { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = 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")` error: this loop never actually loops --> $DIR/for_loop.rs:63:5 | 63 | / while let Some(x) = option { 64 | | println!("{}", x); 65 | | break; 66 | | } | |_____^ | = note: `-D clippy::never-loop` implied by `-D warnings` error: this loop never actually loops --> $DIR/for_loop.rs:69:5 | 69 | / while let Ok(x) = result { 70 | | println!("{}", x); 71 | | break; 72 | | } | |_____^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:96:14 | 96 | for i in 0..vec.len() { | ^^^^^^^^^^^^ | = note: `-D clippy::needless-range-loop` implied by `-D warnings` help: consider using an iterator | 96 | for in &vec { | ^^^^^^ ^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:105:14 | 105 | for i in 0..vec.len() { | ^^^^^^^^^^^^ help: consider using an iterator | 105 | for in &vec { | ^^^^^^ ^^^^ error: the loop variable `j` is only used to index `STATIC`. --> $DIR/for_loop.rs:110:14 | 110 | for j in 0..4 { | ^^^^ help: consider using an iterator | 110 | for in &STATIC { | ^^^^^^ ^^^^^^^ error: the loop variable `j` is only used to index `CONST`. --> $DIR/for_loop.rs:114:14 | 114 | for j in 0..4 { | ^^^^ help: consider using an iterator | 114 | for in &CONST { | ^^^^^^ ^^^^^^ error: the loop variable `i` is used to index `vec` --> $DIR/for_loop.rs:118:14 | 118 | for i in 0..vec.len() { | ^^^^^^^^^^^^ help: consider using an iterator | 118 | for (i, ) in vec.iter().enumerate() { | ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec2`. --> $DIR/for_loop.rs:126:14 | 126 | for i in 0..vec.len() { | ^^^^^^^^^^^^ help: consider using an iterator | 126 | for in vec2.iter().take(vec.len()) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:130:14 | 130 | for i in 5..vec.len() { | ^^^^^^^^^^^^ help: consider using an iterator | 130 | for in vec.iter().skip(5) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:134:14 | 134 | for i in 0..MAX_LEN { | ^^^^^^^^^^ help: consider using an iterator | 134 | for in vec.iter().take(MAX_LEN) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:138:14 | 138 | for i in 0..=MAX_LEN { | ^^^^^^^^^^^ help: consider using an iterator | 138 | for in vec.iter().take(MAX_LEN + 1) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:142:14 | 142 | for i in 5..10 { | ^^^^^ help: consider using an iterator | 142 | for in vec.iter().take(10).skip(5) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is only used to index `vec`. --> $DIR/for_loop.rs:146:14 | 146 | for i in 5..=10 { | ^^^^^^ help: consider using an iterator | 146 | for in vec.iter().take(10 + 1).skip(5) { | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is used to index `vec` --> $DIR/for_loop.rs:150:14 | 150 | for i in 5..vec.len() { | ^^^^^^^^^^^^ help: consider using an iterator | 150 | for (i, ) in vec.iter().enumerate().skip(5) { | ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: the loop variable `i` is used to index `vec` --> $DIR/for_loop.rs:154:14 | 154 | for i in 5..10 { | ^^^^^ help: consider using an iterator | 154 | for (i, ) in vec.iter().enumerate().take(10).skip(5) { | ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:158:14 | 158 | for i in 10..0 { | ^^^^^ | = note: `-D clippy::reverse-range-loop` implied by `-D warnings` help: consider using the following if you are attempting to iterate over this range in reverse | 158 | for i in (0..10).rev() { | ^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:162:14 | 162 | for i in 10..=0 { | ^^^^^^ help: consider using the following if you are attempting to iterate over this range in reverse | 162 | for i in (0...10).rev() { | ^^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:166:14 | 166 | for i in MAX_LEN..0 { | ^^^^^^^^^^ help: consider using the following if you are attempting to iterate over this range in reverse | 166 | for i in (0..MAX_LEN).rev() { | ^^^^^^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:170:14 | 170 | for i in 5..5 { | ^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:195:14 | 195 | for i in 10..5 + 4 { | ^^^^^^^^^ help: consider using the following if you are attempting to iterate over this range in reverse | 195 | for i in (5 + 4..10).rev() { | ^^^^^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:199:14 | 199 | for i in (5 + 2)..(3 - 1) { | ^^^^^^^^^^^^^^^^ help: consider using the following if you are attempting to iterate over this range in reverse | 199 | for i in ((3 - 1)..(5 + 2)).rev() { | ^^^^^^^^^^^^^^^^^^^^^^^^ error: this range is empty so this for loop will never run --> $DIR/for_loop.rs:203:14 | 203 | for i in (5 + 2)..(8 - 1) { | ^^^^^^^^^^^^^^^^ error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:225:15 | 225 | for _v in vec.iter() {} | ^^^^^^^^^^ help: to write this more concisely, try: `&vec` | = note: `-D clippy::explicit-iter-loop` implied by `-D warnings` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:227:15 | 227 | for _v in vec.iter_mut() {} | ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&mut vec` error: it is more concise to loop over containers instead of using explicit iteration methods` --> $DIR/for_loop.rs:230:15 | 230 | for _v in out_vec.into_iter() {} | ^^^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `out_vec` | = note: `-D clippy::explicit-into-iter-loop` implied by `-D warnings` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:233:15 | 233 | for _v in array.into_iter() {} | ^^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&array` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:238:15 | 238 | for _v in [1, 2, 3].iter() {} | ^^^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[1, 2, 3]` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:242:15 | 242 | for _v in [0; 32].iter() {} | ^^^^^^^^^^^^^^ help: to write this more concisely, try: `&[0; 32]` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:247:15 | 247 | for _v in ll.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&ll` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:250:15 | 250 | for _v in vd.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&vd` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:253:15 | 253 | for _v in bh.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&bh` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:256:15 | 256 | for _v in hm.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&hm` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:259:15 | 259 | for _v in bt.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&bt` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:262:15 | 262 | for _v in hs.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&hs` error: it is more concise to loop over references to containers instead of using explicit iteration methods --> $DIR/for_loop.rs:265:15 | 265 | for _v in bs.iter() {} | ^^^^^^^^^ help: to write this more concisely, try: `&bs` error: you are iterating over `Iterator::next()` which is an Option; this will compile but is probably not what you want --> $DIR/for_loop.rs:267:15 | 267 | for _v in vec.iter().next() {} | ^^^^^^^^^^^^^^^^^ error: you are collect()ing an iterator and throwing away the result. Consider using an explicit for loop to exhaust the iterator --> $DIR/for_loop.rs:274:5 | 274 | vec.iter().cloned().map(|x| out.push(x)).collect::>(); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::unused-collect` implied by `-D warnings` error: the variable `_index` is used as a loop counter. Consider using `for (_index, item) in &vec.enumerate()` or similar iterators --> $DIR/for_loop.rs:279:15 | 279 | for _v in &vec { | ^^^^ | = note: `-D clippy::explicit-counter-loop` implied by `-D warnings` error: the variable `_index` is used as a loop counter. Consider using `for (_index, item) in &vec.enumerate()` or similar iterators --> $DIR/for_loop.rs:285:15 | 285 | for _v in &vec { | ^^^^ error: you seem to want to iterate on a map's values --> $DIR/for_loop.rs:395:19 | 395 | for (_, v) in &m { | ^^ | = note: `-D clippy::for-kv-map` implied by `-D warnings` help: use the corresponding method | 395 | for v in m.values() { | ^ ^^^^^^^^^^ error: you seem to want to iterate on a map's values --> $DIR/for_loop.rs:400:19 | 400 | for (_, v) in &*m { | ^^^ help: use the corresponding method | 400 | for v in (*m).values() { | ^ ^^^^^^^^^^^^^ error: you seem to want to iterate on a map's values --> $DIR/for_loop.rs:408:19 | 408 | for (_, v) in &mut m { | ^^^^^^ help: use the corresponding method | 408 | for v in m.values_mut() { | ^ ^^^^^^^^^^^^^^ error: you seem to want to iterate on a map's values --> $DIR/for_loop.rs:413:19 | 413 | for (_, v) in &mut *m { | ^^^^^^^ help: use the corresponding method | 413 | for v in (*m).values_mut() { | ^ ^^^^^^^^^^^^^^^^^ error: you seem to want to iterate on a map's keys --> $DIR/for_loop.rs:419:24 | 419 | for (k, _value) in rm { | ^^ help: use the corresponding method | 419 | for k in rm.keys() { | ^ ^^^^^^^^^ error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:472:14 | 472 | for i in 0..src.len() { | ^^^^^^^^^^^^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..])` | = note: `-D clippy::manual-memcpy` implied by `-D warnings` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:477:14 | 477 | for i in 0..src.len() { | ^^^^^^^^^^^^ help: try replacing the loop by: `dst[10..(src.len() + 10)].clone_from_slice(&src[..])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:482:14 | 482 | for i in 0..src.len() { | ^^^^^^^^^^^^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[10..])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:487:14 | 487 | for i in 11..src.len() { | ^^^^^^^^^^^^^ help: try replacing the loop by: `dst[11..src.len()].clone_from_slice(&src[(11 - 10)..(src.len() - 10)])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:492:14 | 492 | for i in 0..dst.len() { | ^^^^^^^^^^^^ help: try replacing the loop by: `dst.clone_from_slice(&src[..dst.len()])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:505:14 | 505 | for i in 10..256 { | ^^^^^^^ help: try replacing the loop by | 505 | for i in dst[10..256].clone_from_slice(&src[(10 - 5)..(256 - 5)]) 506 | dst2[(10 + 500)..(256 + 500)].clone_from_slice(&src[10..256]) { | error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:517:14 | 517 | for i in 10..LOOP_OFFSET { | ^^^^^^^^^^^^^^^ 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)])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:530:14 | 530 | for i in 0..src_vec.len() { | ^^^^^^^^^^^^^^^^ help: try replacing the loop by: `dst_vec[..src_vec.len()].clone_from_slice(&src_vec[..])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:559:14 | 559 | for i in from..from + src.len() { | ^^^^^^^^^^^^^^^^^^^^^^ help: try replacing the loop by: `dst[from..from + src.len()].clone_from_slice(&src[0..(from + src.len() - from)])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:563:14 | 563 | for i in from..from + 3 { | ^^^^^^^^^^^^^^ help: try replacing the loop by: `dst[from..from + 3].clone_from_slice(&src[0..(from + 3 - from)])` error: it looks like you're manually copying between slices --> $DIR/for_loop.rs:570:14 | 570 | for i in 0..src.len() { | ^^^^^^^^^^^^ help: try replacing the loop by: `dst[..src.len()].clone_from_slice(&src[..])` error: the variable `count` is used as a loop counter. Consider using `for (count, item) in text.chars().enumerate()` or similar iterators --> $DIR/for_loop.rs:631:19 | 631 | for ch in text.chars() { | ^^^^^^^^^^^^ error: the variable `count` is used as a loop counter. Consider using `for (count, item) in text.chars().enumerate()` or similar iterators --> $DIR/for_loop.rs:642:19 | 642 | for ch in text.chars() { | ^^^^^^^^^^^^ error: aborting due to 63 previous errors