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Auto merge of #8462 - ken-matsui:use-precise-namespace-for-reverse, r=llogiq

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Use the precise namespace for `Reverse`

Closes: https://github.com/rust-lang/rust-clippy/issues/8461

changelog: [`unnecessary_sort_by`](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_sort_by): Use the precise namespace for `Reverse`
This commit is contained in:
bors 2022-02-26 14:49:39 +00:00
commit d1ca1c1d0c
4 changed files with 21 additions and 25 deletions
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2
clippy_lints/src/unnecessary_sort_by.rs
View File

@ -239,7 +239,7 @@ impl LateLintPass<'_> for UnnecessarySortBy {
if trigger.unstable { "_unstable" } else { "" },
trigger.closure_arg,
if trigger.reverse {
format!("Reverse({})", trigger.closure_body)
format!("std::cmp::Reverse({})", trigger.closure_body)
} else {
trigger.closure_body.to_string()
},

10
tests/ui/unnecessary_sort_by.fixed
View File

@ -3,7 +3,6 @@
#![allow(clippy::stable_sort_primitive)]
use std::cell::Ref;
use std::cmp::Reverse;
fn unnecessary_sort_by() {
fn id(x: isize) -> isize {
@ -18,8 +17,8 @@ fn unnecessary_sort_by() {
vec.sort_unstable_by_key(|a| id(-a));
// Reverse examples
vec.sort_by(|a, b| b.cmp(a)); // not linted to avoid suggesting `Reverse(b)` which would borrow
vec.sort_by_key(|b| Reverse((b + 5).abs()));
vec.sort_unstable_by_key(|b| Reverse(id(-b)));
vec.sort_by_key(|b| std::cmp::Reverse((b + 5).abs()));
vec.sort_unstable_by_key(|b| std::cmp::Reverse(id(-b)));
// Negative examples (shouldn't be changed)
let c = &7;
vec.sort_by(|a, b| (b - a).cmp(&(a - b)));
@ -76,7 +75,6 @@ mod issue_5754 {
// The closure parameter is not dereferenced anymore, so non-Copy types can be linted
mod issue_6001 {
use super::*;
struct Test(String);
impl Test {
@ -93,8 +91,8 @@ mod issue_6001 {
args.sort_by_key(|a| a.name());
args.sort_unstable_by_key(|a| a.name());
// Reverse
args.sort_by_key(|b| Reverse(b.name()));
args.sort_unstable_by_key(|b| Reverse(b.name()));
args.sort_by_key(|b| std::cmp::Reverse(b.name()));
args.sort_unstable_by_key(|b| std::cmp::Reverse(b.name()));
}
}

2
tests/ui/unnecessary_sort_by.rs
View File

@ -3,7 +3,6 @@
#![allow(clippy::stable_sort_primitive)]
use std::cell::Ref;
use std::cmp::Reverse;
fn unnecessary_sort_by() {
fn id(x: isize) -> isize {
@ -76,7 +75,6 @@ mod issue_5754 {
// The closure parameter is not dereferenced anymore, so non-Copy types can be linted
mod issue_6001 {
use super::*;
struct Test(String);
impl Test {

32
tests/ui/unnecessary_sort_by.stderr
View File

@ -1,5 +1,5 @@
error: use Vec::sort here instead
--> $DIR/unnecessary_sort_by.rs:15:5
--> $DIR/unnecessary_sort_by.rs:14:5
|
LL | vec.sort_by(|a, b| a.cmp(b));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort()`
@ -7,70 +7,70 @@ LL | vec.sort_by(|a, b| a.cmp(b));
= note: `-D clippy::unnecessary-sort-by` implied by `-D warnings`
error: use Vec::sort here instead
--> $DIR/unnecessary_sort_by.rs:16:5
--> $DIR/unnecessary_sort_by.rs:15:5
|
LL | vec.sort_unstable_by(|a, b| a.cmp(b));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_unstable()`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:17:5
--> $DIR/unnecessary_sort_by.rs:16:5
|
LL | vec.sort_by(|a, b| (a + 5).abs().cmp(&(b + 5).abs()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_by_key(|a| (a + 5).abs())`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:18:5
--> $DIR/unnecessary_sort_by.rs:17:5
|
LL | vec.sort_unstable_by(|a, b| id(-a).cmp(&id(-b)));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_unstable_by_key(|a| id(-a))`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:21:5
--> $DIR/unnecessary_sort_by.rs:20:5
|
LL | vec.sort_by(|a, b| (b + 5).abs().cmp(&(a + 5).abs()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_by_key(|b| Reverse((b + 5).abs()))`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_by_key(|b| std::cmp::Reverse((b + 5).abs()))`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:22:5
--> $DIR/unnecessary_sort_by.rs:21:5
|
LL | vec.sort_unstable_by(|a, b| id(-b).cmp(&id(-a)));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_unstable_by_key(|b| Reverse(id(-b)))`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_unstable_by_key(|b| std::cmp::Reverse(id(-b)))`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:32:5
--> $DIR/unnecessary_sort_by.rs:31:5
|
LL | vec.sort_by(|a, b| (***a).abs().cmp(&(***b).abs()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_by_key(|a| (***a).abs())`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:33:5
--> $DIR/unnecessary_sort_by.rs:32:5
|
LL | vec.sort_unstable_by(|a, b| (***a).abs().cmp(&(***b).abs()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `vec.sort_unstable_by_key(|a| (***a).abs())`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:93:9
--> $DIR/unnecessary_sort_by.rs:91:9
|
LL | args.sort_by(|a, b| a.name().cmp(&b.name()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_by_key(|a| a.name())`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:94:9
--> $DIR/unnecessary_sort_by.rs:92:9
|
LL | args.sort_unstable_by(|a, b| a.name().cmp(&b.name()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_unstable_by_key(|a| a.name())`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:96:9
--> $DIR/unnecessary_sort_by.rs:94:9
|
LL | args.sort_by(|a, b| b.name().cmp(&a.name()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_by_key(|b| Reverse(b.name()))`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_by_key(|b| std::cmp::Reverse(b.name()))`
error: use Vec::sort_by_key here instead
--> $DIR/unnecessary_sort_by.rs:97:9
--> $DIR/unnecessary_sort_by.rs:95:9
|
LL | args.sort_unstable_by(|a, b| b.name().cmp(&a.name()));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_unstable_by_key(|b| Reverse(b.name()))`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `args.sort_unstable_by_key(|b| std::cmp::Reverse(b.name()))`
error: aborting due to 12 previous errors