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add suggestion for unit enum variant when matched with a patern
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,26 @@ | ||
// test for suggestion on fieldless enum variant | ||
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#[derive(PartialEq, Debug)] | ||
enum FarmAnimal { | ||
Worm, | ||
Cow, | ||
Bull, | ||
Chicken { num_eggs: usize }, | ||
Dog (String), | ||
} | ||
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fn what_does_the_animal_say(animal: &FarmAnimal) { | ||
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let noise = match animal { | ||
FarmAnimal::Cow(_) => "moo".to_string(), | ||
//~^ ERROR expected tuple struct or tuple variant, found unit variant `FarmAnimal::Cow` | ||
FarmAnimal::Chicken(_) => "cluck, cluck!".to_string(), | ||
//~^ ERROR expected tuple struct or tuple variant, found struct variant `FarmAnimal::Chicken` | ||
FarmAnimal::Dog{..} => "woof!".to_string(), | ||
_ => todo!() | ||
}; | ||
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println!("{:?} says: {:?}", animal, noise); | ||
} | ||
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fn main() {} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,21 @@ | ||
error[E0532]: expected tuple struct or tuple variant, found unit variant `FarmAnimal::Cow` | ||
--> $DIR/issue-84700.rs:15:9 | ||
| | ||
LL | Cow, | ||
| --- `FarmAnimal::Cow` defined here | ||
... | ||
LL | FarmAnimal::Cow(_) => "moo".to_string(), | ||
| ^^^^^^^^^^^^^^^^^^ help: use this syntax instead: `FarmAnimal::Cow` | ||
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error[E0532]: expected tuple struct or tuple variant, found struct variant `FarmAnimal::Chicken` | ||
--> $DIR/issue-84700.rs:17:9 | ||
| | ||
LL | Chicken { num_eggs: usize }, | ||
| --------------------------- `FarmAnimal::Chicken` defined here | ||
... | ||
LL | FarmAnimal::Chicken(_) => "cluck, cluck!".to_string(), | ||
| ^^^^^^^^^^^^^^^^^^^^^^ help: use struct pattern syntax instead: `FarmAnimal::Chicken { num_eggs }` | ||
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error: aborting due to 2 previous errors | ||
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For more information about this error, try `rustc --explain E0532`. |