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Reveal opaque types in exhaustiveness checking

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This commit is contained in:
Nadrieril 2023-11-16 04:28:22 +01:00
parent 7e4924b55d
commit 2a87bae48d
7 changed files with 76 additions and 42 deletions
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10
tests/ui/pattern/usefulness/impl-trait.rs
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@ -14,7 +14,7 @@ enum Void {}
fn return_never_rpit(x: Void) -> impl Copy {
if false {
match return_never_rpit(x) {
_ => {}
_ => {} //~ ERROR unreachable
}
}
x
@ -28,7 +28,7 @@ type T = impl Copy;
fn return_never_tait(x: Void) -> T {
if false {
match return_never_tait(x) {
_ => {}
_ => {} //~ ERROR unreachable
}
}
x
@ -42,7 +42,7 @@ fn option_never(x: Void) -> Option<impl Copy> {
if false {
match option_never(x) {
None => {}
Some(_) => {}
Some(_) => {} //~ ERROR unreachable
}
match option_never(x) {
None => {}
@ -75,7 +75,7 @@ fn inner_never(x: Void) {
type T = impl Copy;
let y: T = x;
match y {
_ => {}
_ => {} //~ ERROR unreachable
}
}
@ -93,7 +93,7 @@ type U = impl Copy;
fn unify_never(x: Void, u: U) -> U {
if false {
match u {
_ => {}
_ => {} //~ ERROR unreachable
}
}
x