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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/reachable/unreachable-try-pattern.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/reachable/unreachable-try-pattern.rs')
-rw-r--r-- | src/test/ui/reachable/unreachable-try-pattern.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/reachable/unreachable-try-pattern.rs b/src/test/ui/reachable/unreachable-try-pattern.rs new file mode 100644 index 000000000..23360e73f --- /dev/null +++ b/src/test/ui/reachable/unreachable-try-pattern.rs @@ -0,0 +1,41 @@ +// check-pass +#![feature(never_type, exhaustive_patterns)] +#![warn(unreachable_code)] +#![warn(unreachable_patterns)] + +enum Void {} + +impl From<Void> for i32 { + fn from(v: Void) -> i32 { + match v {} + } +} + +fn bar(x: Result<!, i32>) -> Result<u32, i32> { + x? +} + +fn foo(x: Result<!, i32>) -> Result<u32, i32> { + let y = (match x { Ok(n) => Ok(n as u32), Err(e) => Err(e) })?; + //~^ WARN unreachable pattern + //~| WARN unreachable expression + Ok(y) +} + +fn qux(x: Result<u32, Void>) -> Result<u32, i32> { + Ok(x?) +} + +fn vom(x: Result<u32, Void>) -> Result<u32, i32> { + let y = (match x { Ok(n) => Ok(n), Err(e) => Err(e) })?; + //~^ WARN unreachable pattern + Ok(y) +} + + +fn main() { + let _ = bar(Err(123)); + let _ = foo(Err(123)); + let _ = qux(Ok(123)); + let _ = vom(Ok(123)); +} |