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Add negation to len_zero lint to show more explicit message. #4314

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merged 2 commits into from
Aug 1, 2019
Merged

Add negation to len_zero lint to show more explicit message. #4314

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2d467dc
Add required negation in non_zero lint
Jul 29, 2019
ccc3257
Update `stderr` file
Aug 1, 2019
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2 changes: 1 addition & 1 deletion clippy_lints/src/len_zero.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -244,7 +244,7 @@ fn check_len(
LEN_ZERO,
span,
&format!("length comparison to {}", if compare_to == 0 { "zero" } else { "one" }),
"using `is_empty` is clearer and more explicit",
&format!("using `{}is_empty` is clearer and more explicit", op),
format!(
"{}{}.is_empty()",
op,
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14 changes: 7 additions & 7 deletions tests/ui/len_zero.stderr
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Original file line number Diff line number Diff line change
Expand Up @@ -22,13 +22,13 @@ error: length comparison to zero
--> $DIR/len_zero.rs:83:8
|
LL | if has_is_empty.len() != 0 {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:86:8
|
LL | if has_is_empty.len() > 0 {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:89:8
Expand All @@ -40,7 +40,7 @@ error: length comparison to one
--> $DIR/len_zero.rs:92:8
|
LL | if has_is_empty.len() >= 1 {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:103:8
Expand All @@ -52,19 +52,19 @@ error: length comparison to zero
--> $DIR/len_zero.rs:106:8
|
LL | if 0 != has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:109:8
|
LL | if 0 < has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:112:8
|
LL | if 1 <= has_is_empty.len() {
| ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!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:115:8
Expand All @@ -82,7 +82,7 @@ error: length comparison to zero
--> $DIR/len_zero.rs:142:8
|
LL | if b.len() != 0 {}
| ^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!b.is_empty()`
| ^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!b.is_empty()`

error: aborting due to 14 previous errors