rust-clippy/tests/ui/for_loop.stderr

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:41:14
   |
LL |     for i in 0..vec.len() {
   |              ^^^^^^^^^^^^
   |
   = note: `-D clippy::needless-range-loop` implied by `-D warnings`
help: consider using an iterator
   |
LL |     for <item> in &vec {
   |         ^^^^^^    ^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:50:14
   |
LL |     for i in 0..vec.len() {
   |              ^^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for <item> in &vec {
   |         ^^^^^^    ^^^^

error: the loop variable `j` is only used to index `STATIC`.
  --> $DIR/for_loop.rs:55:14
   |
LL |     for j in 0..4 {
   |              ^^^^
help: consider using an iterator
   |
LL |     for <item> in &STATIC {
   |         ^^^^^^    ^^^^^^^

error: the loop variable `j` is only used to index `CONST`.
  --> $DIR/for_loop.rs:59:14
   |
LL |     for j in 0..4 {
   |              ^^^^
help: consider using an iterator
   |
LL |     for <item> in &CONST {
   |         ^^^^^^    ^^^^^^

error: the loop variable `i` is used to index `vec`
  --> $DIR/for_loop.rs:63:14
   |
LL |     for i in 0..vec.len() {
   |              ^^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for (i, <item>) in vec.iter().enumerate() {
   |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec2`.
  --> $DIR/for_loop.rs:71:14
   |
LL |     for i in 0..vec.len() {
   |              ^^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec2.iter().take(vec.len()) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:75:14
   |
LL |     for i in 5..vec.len() {
   |              ^^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec.iter().skip(5) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:79:14
   |
LL |     for i in 0..MAX_LEN {
   |              ^^^^^^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec.iter().take(MAX_LEN) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:83:14
   |
LL |     for i in 0..=MAX_LEN {
   |              ^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec.iter().take(MAX_LEN + 1) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:87:14
   |
LL |     for i in 5..10 {
   |              ^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec.iter().take(10).skip(5) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is only used to index `vec`.
  --> $DIR/for_loop.rs:91:14
   |
LL |     for i in 5..=10 {
   |              ^^^^^^
help: consider using an iterator
   |
LL |     for <item> in vec.iter().take(10 + 1).skip(5) {
   |         ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is used to index `vec`
  --> $DIR/for_loop.rs:95:14
   |
LL |     for i in 5..vec.len() {
   |              ^^^^^^^^^^^^
help: consider using an iterator
   |
LL |     for (i, <item>) in vec.iter().enumerate().skip(5) {
   |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the loop variable `i` is used to index `vec`
  --> $DIR/for_loop.rs:99:14
   |
LL |     for i in 5..10 {
   |              ^^^^^
help: consider using an iterator
   |
LL |     for (i, <item>) in vec.iter().enumerate().take(10).skip(5) {
   |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:103:14
   |
LL |     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
   |
LL |     for i in (0..10).rev() {
   |              ^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:107:14
   |
LL |     for i in 10..=0 {
   |              ^^^^^^
help: consider using the following if you are attempting to iterate over this range in reverse
   |
LL |     for i in (0...10).rev() {
   |              ^^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:111:14
   |
LL |     for i in MAX_LEN..0 {
   |              ^^^^^^^^^^
help: consider using the following if you are attempting to iterate over this range in reverse
   |
LL |     for i in (0..MAX_LEN).rev() {
   |              ^^^^^^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:115:14
   |
LL |     for i in 5..5 {
   |              ^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:140:14
   |
LL |     for i in 10..5 + 4 {
   |              ^^^^^^^^^
help: consider using the following if you are attempting to iterate over this range in reverse
   |
LL |     for i in (5 + 4..10).rev() {
   |              ^^^^^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:144:14
   |
LL |     for i in (5 + 2)..(3 - 1) {
   |              ^^^^^^^^^^^^^^^^
help: consider using the following if you are attempting to iterate over this range in reverse
   |
LL |     for i in ((3 - 1)..(5 + 2)).rev() {
   |              ^^^^^^^^^^^^^^^^^^^^^^^^

error: this range is empty so this for loop will never run
  --> $DIR/for_loop.rs:148:14
   |
LL |     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:170:15
   |
LL |     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:172:15
   |
LL |     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:175:15
   |
LL |     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:178:15
   |
LL |     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:183:15
   |
LL |     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:187:15
   |
LL |     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:192:15
   |
LL |     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:195:15
   |
LL |     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:198:15
   |
LL |     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:201:15
   |
LL |     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:204:15
   |
LL |     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:207:15
   |
LL |     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:210:15
   |
LL |     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:212:15
   |
LL |     for _v in vec.iter().next() {}
   |               ^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::iter-next-loop` implied by `-D warnings`

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:219:5
   |
LL |     vec.iter().cloned().map(|x| out.push(x)).collect::<Vec<_>>();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::unused-collect` implied by `-D warnings`

error: aborting due to 35 previous errors