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single_match: Clarify the don't lint
test case
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2 changed files with 9 additions and 7 deletions
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@ -152,7 +152,9 @@ fn ranges() {
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}
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let x = (Some(E::V), Some(42));
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// don't lint
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// Don't lint, because the `E` enum can be extended with additional fields later. Thus, the
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// proposed replacement to `if let Some(E::V)` may hide non-exhaustive warnings that appeared
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// because of `match` construction.
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match x {
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(Some(E::V), _) => {},
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(None, _) => {},
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@ -176,19 +178,19 @@ fn ranges() {
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(..) => {},
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}
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// don't lint
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// Don't lint, see above.
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match (Some(E::V), Some(E::V), Some(E::V)) {
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(.., Some(E::V), _) => {},
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(.., None, _) => {},
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}
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// don't lint
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// Don't lint, see above.
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match (Some(E::V), Some(E::V), Some(E::V)) {
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(Some(E::V), ..) => {},
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(None, ..) => {},
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}
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// don't lint
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// Don't lint, see above.
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match (Some(E::V), Some(E::V), Some(E::V)) {
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(_, Some(E::V), ..) => {},
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(_, None, ..) => {},
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@ -120,7 +120,7 @@ LL | | };
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| |_____^ help: try this: `if let None = x { println!() }`
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error: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
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--> $DIR/single_match.rs:162:5
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--> $DIR/single_match.rs:164:5
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LL | / match x {
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LL | | (Some(_), _) => {},
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@ -129,7 +129,7 @@ LL | | }
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| |_____^ help: try this: `if let (Some(_), _) = x {}`
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error: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
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--> $DIR/single_match.rs:168:5
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--> $DIR/single_match.rs:170:5
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LL | / match x {
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LL | | (Some(E::V), _) => todo!(),
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@ -138,7 +138,7 @@ LL | | }
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| |_____^ help: try this: `if let (Some(E::V), _) = x { todo!() }`
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error: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
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--> $DIR/single_match.rs:174:5
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--> $DIR/single_match.rs:176:5
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LL | / match (Some(42), Some(E::V), Some(42)) {
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LL | | (.., Some(E::V), _) => {},
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