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https://github.com/rust-lang/rust-clippy
synced 2024-11-10 15:14:29 +00:00
Add #[must_use] to len and is_empty
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parent
5cf4984872
commit
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3 changed files with 39 additions and 37 deletions
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@ -33,6 +33,7 @@ impl HasIter {
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}
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}
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#[allow(unused_must_use)]
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fn main() {
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let mut vec = vec![0, 1, 2, 3];
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let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
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@ -50,7 +51,7 @@ fn main() {
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linked_list.push_back(1);
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binary_heap.push(1);
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let _ = &vec[..].len();
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&vec[..].len();
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vec.len();
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boxed_slice.len();
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vec_deque.len();
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@ -62,13 +63,13 @@ fn main() {
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binary_heap.len();
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vec.len();
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let _ = &vec[..].len();
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&vec[..].len();
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vec_deque.len();
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hash_map.len();
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b_tree_map.len();
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linked_list.len();
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let _ = &vec[..].len();
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&vec[..].len();
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vec.len();
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vec_deque.len();
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hash_set.len();
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@ -33,6 +33,7 @@ impl HasIter {
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}
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}
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#[allow(unused_must_use)]
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fn main() {
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let mut vec = vec![0, 1, 2, 3];
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let mut boxed_slice: Box<[u8]> = Box::new([0, 1, 2, 3]);
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@ -50,7 +51,7 @@ fn main() {
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linked_list.push_back(1);
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binary_heap.push(1);
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let _ = &vec[..].iter().count();
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&vec[..].iter().count();
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vec.iter().count();
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boxed_slice.iter().count();
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vec_deque.iter().count();
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@ -62,13 +63,13 @@ fn main() {
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binary_heap.iter().count();
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vec.iter_mut().count();
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let _ = &vec[..].iter_mut().count();
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&vec[..].iter_mut().count();
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vec_deque.iter_mut().count();
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hash_map.iter_mut().count();
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b_tree_map.iter_mut().count();
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linked_list.iter_mut().count();
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let _ = &vec[..].into_iter().count();
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&vec[..].into_iter().count();
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vec.into_iter().count();
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vec_deque.into_iter().count();
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hash_set.into_iter().count();
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@ -1,151 +1,151 @@
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error: called `.iter().count()` on a `slice`
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--> $DIR/iter_count.rs:53:14
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--> $DIR/iter_count.rs:54:6
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LL | let _ = &vec[..].iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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LL | &vec[..].iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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= note: `-D clippy::iter-count` implied by `-D warnings`
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error: called `.iter().count()` on a `Vec`
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--> $DIR/iter_count.rs:54:5
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--> $DIR/iter_count.rs:55:5
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LL | vec.iter().count();
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| ^^^^^^^^^^^^^^^^^^ help: try: `vec.len()`
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error: called `.iter().count()` on a `slice`
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--> $DIR/iter_count.rs:55:5
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--> $DIR/iter_count.rs:56:5
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LL | boxed_slice.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `boxed_slice.len()`
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error: called `.iter().count()` on a `VecDeque`
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--> $DIR/iter_count.rs:56:5
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--> $DIR/iter_count.rs:57:5
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LL | vec_deque.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec_deque.len()`
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error: called `.iter().count()` on a `HashSet`
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--> $DIR/iter_count.rs:57:5
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--> $DIR/iter_count.rs:58:5
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LL | hash_set.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `hash_set.len()`
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error: called `.iter().count()` on a `HashMap`
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--> $DIR/iter_count.rs:58:5
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--> $DIR/iter_count.rs:59:5
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LL | hash_map.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `hash_map.len()`
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error: called `.iter().count()` on a `BTreeMap`
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--> $DIR/iter_count.rs:59:5
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--> $DIR/iter_count.rs:60:5
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LL | b_tree_map.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b_tree_map.len()`
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error: called `.iter().count()` on a `BTreeSet`
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--> $DIR/iter_count.rs:60:5
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--> $DIR/iter_count.rs:61:5
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LL | b_tree_set.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b_tree_set.len()`
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error: called `.iter().count()` on a `LinkedList`
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--> $DIR/iter_count.rs:61:5
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--> $DIR/iter_count.rs:62:5
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LL | linked_list.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `linked_list.len()`
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error: called `.iter().count()` on a `BinaryHeap`
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--> $DIR/iter_count.rs:62:5
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--> $DIR/iter_count.rs:63:5
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LL | binary_heap.iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `binary_heap.len()`
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error: called `.iter_mut().count()` on a `Vec`
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--> $DIR/iter_count.rs:64:5
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--> $DIR/iter_count.rs:65:5
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LL | vec.iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.len()`
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error: called `.iter_mut().count()` on a `slice`
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--> $DIR/iter_count.rs:65:14
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--> $DIR/iter_count.rs:66:6
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LL | let _ = &vec[..].iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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LL | &vec[..].iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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error: called `.iter_mut().count()` on a `VecDeque`
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--> $DIR/iter_count.rs:66:5
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--> $DIR/iter_count.rs:67:5
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LL | vec_deque.iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec_deque.len()`
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error: called `.iter_mut().count()` on a `HashMap`
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--> $DIR/iter_count.rs:67:5
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--> $DIR/iter_count.rs:68:5
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LL | hash_map.iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `hash_map.len()`
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error: called `.iter_mut().count()` on a `BTreeMap`
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--> $DIR/iter_count.rs:68:5
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--> $DIR/iter_count.rs:69:5
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LL | b_tree_map.iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b_tree_map.len()`
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error: called `.iter_mut().count()` on a `LinkedList`
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--> $DIR/iter_count.rs:69:5
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--> $DIR/iter_count.rs:70:5
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LL | linked_list.iter_mut().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `linked_list.len()`
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error: called `.into_iter().count()` on a `slice`
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--> $DIR/iter_count.rs:71:14
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--> $DIR/iter_count.rs:72:6
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LL | let _ = &vec[..].into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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LL | &vec[..].into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec[..].len()`
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error: called `.into_iter().count()` on a `Vec`
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--> $DIR/iter_count.rs:72:5
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--> $DIR/iter_count.rs:73:5
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LL | vec.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.len()`
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error: called `.into_iter().count()` on a `VecDeque`
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--> $DIR/iter_count.rs:73:5
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--> $DIR/iter_count.rs:74:5
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LL | vec_deque.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec_deque.len()`
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error: called `.into_iter().count()` on a `HashSet`
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--> $DIR/iter_count.rs:74:5
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--> $DIR/iter_count.rs:75:5
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LL | hash_set.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `hash_set.len()`
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error: called `.into_iter().count()` on a `HashMap`
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--> $DIR/iter_count.rs:75:5
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--> $DIR/iter_count.rs:76:5
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LL | hash_map.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `hash_map.len()`
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error: called `.into_iter().count()` on a `BTreeMap`
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--> $DIR/iter_count.rs:76:5
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--> $DIR/iter_count.rs:77:5
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LL | b_tree_map.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b_tree_map.len()`
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error: called `.into_iter().count()` on a `BTreeSet`
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--> $DIR/iter_count.rs:77:5
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--> $DIR/iter_count.rs:78:5
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LL | b_tree_set.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b_tree_set.len()`
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error: called `.into_iter().count()` on a `LinkedList`
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--> $DIR/iter_count.rs:78:5
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--> $DIR/iter_count.rs:79:5
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LL | linked_list.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `linked_list.len()`
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error: called `.into_iter().count()` on a `BinaryHeap`
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--> $DIR/iter_count.rs:79:5
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--> $DIR/iter_count.rs:80:5
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LL | binary_heap.into_iter().count();
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `binary_heap.len()`
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