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Fix issue rust-lang#3322: reword help message for len_zero
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Giorgio Gambino authored and lukasstevens committed Oct 18, 2018
1 parent 6816f77 commit c4d6f93
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Showing 2 changed files with 15 additions and 15 deletions.
2 changes: 1 addition & 1 deletion clippy_lints/src/len_zero.rs
Original file line number Diff line number Diff line change
Expand Up @@ -240,7 +240,7 @@ fn check_len(cx: &LateContext<'_, '_>, span: Span, method_name: Name, args: &[Ex
LEN_ZERO,
span,
&format!("length comparison to {}", if compare_to == 0 { "zero" } else { "one" }),
"using `is_empty` is more concise",
"using `is_empty` is clearer and more explicit",
format!("{}{}.is_empty()", op, snippet(cx, args[0].span, "_")),
);
}
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28 changes: 14 additions & 14 deletions tests/ui/len_zero.stderr
Original file line number Diff line number Diff line change
Expand Up @@ -46,87 +46,87 @@ error: length comparison to zero
--> $DIR/len_zero.rs:151:8
|
151 | if x.len() == 0 {
| ^^^^^^^^^^^^ help: using `is_empty` is more concise: `x.is_empty()`
| ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `x.is_empty()`
|
= note: `-D clippy::len-zero` implied by `-D warnings`

error: length comparison to zero
--> $DIR/len_zero.rs:155:8
|
155 | if "".len() == 0 {}
| ^^^^^^^^^^^^^ help: using `is_empty` is more concise: `"".is_empty()`
| ^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `"".is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:170:8
|
170 | if has_is_empty.len() == 0 {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:173:8
|
173 | if has_is_empty.len() != 0 {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:176:8
|
176 | if has_is_empty.len() > 0 {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to one
--> $DIR/len_zero.rs:179:8
|
179 | if has_is_empty.len() < 1 {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `has_is_empty.is_empty()`

error: length comparison to one
--> $DIR/len_zero.rs:182:8
|
182 | if has_is_empty.len() >= 1 {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:193:8
|
193 | if 0 == has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:196:8
|
196 | if 0 != has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:199:8
|
199 | if 0 < has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to one
--> $DIR/len_zero.rs:202:8
|
202 | if 1 <= has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `!has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!has_is_empty.is_empty()`

error: length comparison to one
--> $DIR/len_zero.rs:205:8
|
205 | if 1 > has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `has_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `has_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:219:8
|
219 | if with_is_empty.len() == 0 {
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is more concise: `with_is_empty.is_empty()`
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `with_is_empty.is_empty()`

error: length comparison to zero
--> $DIR/len_zero.rs:232:8
|
232 | if b.len() != 0 {}
| ^^^^^^^^^^^^ help: using `is_empty` is more concise: `!b.is_empty()`
| ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!b.is_empty()`

error: trait `DependsOnFoo` has a `len` method but no (possibly inherited) `is_empty` method
--> $DIR/len_zero.rs:238:1
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