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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/tools/clippy/tests/ui/match_as_ref.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/tools/clippy/tests/ui/match_as_ref.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/match_as_ref.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/match_as_ref.rs b/src/tools/clippy/tests/ui/match_as_ref.rs new file mode 100644 index 000000000..025d475ae --- /dev/null +++ b/src/tools/clippy/tests/ui/match_as_ref.rs @@ -0,0 +1,52 @@ +// run-rustfix + +#![allow(unused)] +#![warn(clippy::match_as_ref)] + +fn match_as_ref() { + let owned: Option<()> = None; + let borrowed: Option<&()> = match owned { + None => None, + Some(ref v) => Some(v), + }; + + let mut mut_owned: Option<()> = None; + let borrow_mut: Option<&mut ()> = match mut_owned { + None => None, + Some(ref mut v) => Some(v), + }; +} + +mod issue4437 { + use std::{error::Error, fmt, num::ParseIntError}; + + #[derive(Debug)] + struct E { + source: Option<ParseIntError>, + } + + impl Error for E { + fn source(&self) -> Option<&(dyn Error + 'static)> { + match self.source { + Some(ref s) => Some(s), + None => None, + } + } + } + + impl fmt::Display for E { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + unimplemented!() + } + } +} + +fn main() { + // Don't lint + let _ = match Some(0) { + #[cfg(feature = "foo")] + Some(ref x) if *x > 50 => None, + Some(ref x) => Some(x), + None => None, + }; +} |