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Fix suggestion span in explicit_counter_loop

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HMPerson1 2019-10-18 01:15:54 -04:00
parent 72f3439346
commit 4578e5e15e
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2 changed files with 24 additions and 15 deletions
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11
clippy_lints/src/loops.rs
View file

@ -1461,10 +1461,19 @@ fn check_for_loop_explicit_counter<'a, 'tcx>(
if visitor2.state == VarState::Warn {
if let Some(name) = visitor2.name {
let mut applicability = Applicability::MachineApplicable;
// for some reason this is the only way to get the `Span`
// of the entire `for` loop
let for_span = if let ExprKind::Match(_, arms, _) = &expr.kind {
arms[0].body.span
} else {
unreachable!()
};
span_lint_and_sugg(
cx,
EXPLICIT_COUNTER_LOOP,
expr.span,
for_span.with_hi(arg.span.hi()),
&format!("the variable `{}` is used as a loop counter.", name),
"consider using",
format!(

28
tests/ui/explicit_counter_loop.stderr
View file

@ -1,46 +1,46 @@
error: the variable `_index` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:6:15
--> $DIR/explicit_counter_loop.rs:6:5
|
LL | for _v in &vec {
| ^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
| ^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
|
= note: `-D clippy::explicit-counter-loop` implied by `-D warnings`
error: the variable `_index` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:12:15
--> $DIR/explicit_counter_loop.rs:12:5
|
LL | for _v in &vec {
| ^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
| ^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter().enumerate()`
error: the variable `_index` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:17:15
--> $DIR/explicit_counter_loop.rs:17:5
|
LL | for _v in &mut vec {
| ^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter_mut().enumerate()`
| ^^^^^^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.iter_mut().enumerate()`
error: the variable `_index` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:22:15
--> $DIR/explicit_counter_loop.rs:22:5
|
LL | for _v in vec {
| ^^^ help: consider using: `for (_index, _v) in vec.into_iter().enumerate()`
| ^^^^^^^^^^^^^ help: consider using: `for (_index, _v) in vec.into_iter().enumerate()`
error: the variable `count` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:61:19
--> $DIR/explicit_counter_loop.rs:61:9
|
LL | for ch in text.chars() {
| ^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
error: the variable `count` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:72:19
--> $DIR/explicit_counter_loop.rs:72:9
|
LL | for ch in text.chars() {
| ^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `for (count, ch) in text.chars().enumerate()`
error: the variable `count` is used as a loop counter.
--> $DIR/explicit_counter_loop.rs:130:19
--> $DIR/explicit_counter_loop.rs:130:9
|
LL | for _i in 3..10 {
| ^^^^^ help: consider using: `for (count, _i) in 3..10.enumerate()`
| ^^^^^^^^^^^^^^^ help: consider using: `for (count, _i) in 3..10.enumerate()`
error: aborting due to 7 previous errors