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Improve lint message for match-same-arms lint

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Simplify error message producing & remove extra example
This commit is contained in:
Igor Aleksanov 2021-06-22 15:34:46 +03:00
parent 48fa1dc8bb
commit 39856b17ec
3 changed files with 16 additions and 1 deletions
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3
clippy_lints/src/matches.rs
View file

@ -2266,7 +2266,8 @@ fn lint_match_arms<'tcx>(cx: &LateContext<'tcx>, expr: &Expr<'_>) {
),
);
} else {
diag.span_help(i.pat.span, &format!("consider refactoring into `{} | {}`", lhs, rhs));
diag.span_help(i.pat.span, &format!("consider refactoring into `{} | {}`", lhs, rhs,))
.help("...or consider changing the match arm bodies");
}
},
);

7
tests/ui/match_same_arms.stderr
View file

@ -32,6 +32,7 @@ help: consider refactoring into `(1, .., 3) | (.., 3)`
|
LL | (1, .., 3) => 42,
| ^^^^^^^^^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:24:15
@ -49,6 +50,7 @@ help: consider refactoring into `42 | 51`
|
LL | 42 => 1,
| ^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:26:15
@ -66,6 +68,7 @@ help: consider refactoring into `41 | 52`
|
LL | 41 => 2,
| ^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:32:14
@ -83,6 +86,7 @@ help: consider refactoring into `1 | 2`
|
LL | 1 => 2,
| ^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:33:14
@ -100,6 +104,7 @@ help: consider refactoring into `1 | 3`
|
LL | 1 => 2,
| ^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:33:14
@ -117,6 +122,7 @@ help: consider refactoring into `2 | 3`
|
LL | 2 => 2, //~ ERROR 2nd matched arms have same body
| ^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms.rs:50:55
@ -134,6 +140,7 @@ help: consider refactoring into `CommandInfo::BuiltIn { name, .. } | CommandInfo
|
LL | CommandInfo::BuiltIn { name, .. } => name.to_string(),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= help: ...or consider changing the match arm bodies
error: aborting due to 8 previous errors

7
tests/ui/match_same_arms2.stderr
View file

@ -53,6 +53,7 @@ help: consider refactoring into `42 | 51`
|
LL | 42 => foo(),
| ^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms2.rs:40:17
@ -70,6 +71,7 @@ help: consider refactoring into `Some(_) | None`
|
LL | Some(_) => 24,
| ^^^^^^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms2.rs:62:28
@ -87,6 +89,7 @@ help: consider refactoring into `(Some(a), None) | (None, Some(a))`
|
LL | (Some(a), None) => bar(a),
| ^^^^^^^^^^^^^^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms2.rs:68:26
@ -104,6 +107,7 @@ help: consider refactoring into `(Some(a), ..) | (.., Some(a))`
|
LL | (Some(a), ..) => bar(a),
| ^^^^^^^^^^^^^
= help: ...or consider changing the match arm bodies
error: this `match` has identical arm bodies
--> $DIR/match_same_arms2.rs:102:29
@ -121,6 +125,7 @@ help: consider refactoring into `(Ok(x), Some(_)) | (Ok(_), Some(x))`
|
LL | (Ok(x), Some(_)) => println!("ok {}", x),
| ^^^^^^^^^^^^^^^^
= help: ...or consider changing the match arm bodies
= note: this error originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
error: this `match` has identical arm bodies
@ -139,6 +144,7 @@ help: consider refactoring into `Ok(3) | Ok(_)`
|
LL | Ok(3) => println!("ok"),
| ^^^^^
= help: ...or consider changing the match arm bodies
= note: this error originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
error: this `match` has identical arm bodies
@ -163,6 +169,7 @@ help: consider refactoring into `0 | 1`
|
LL | 0 => {
| ^
= help: ...or consider changing the match arm bodies
error: match expression looks like `matches!` macro
--> $DIR/match_same_arms2.rs:162:16