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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/lint/unused/unused-result.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/lint/unused/unused-result.rs')
-rw-r--r-- | src/test/ui/lint/unused/unused-result.rs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/test/ui/lint/unused/unused-result.rs b/src/test/ui/lint/unused/unused-result.rs new file mode 100644 index 000000000..e283eaa88 --- /dev/null +++ b/src/test/ui/lint/unused/unused-result.rs @@ -0,0 +1,42 @@ +#![allow(dead_code)] +#![deny(unused_results, unused_must_use)] +//~^ NOTE: the lint level is defined here +//~| NOTE: the lint level is defined here + +#[must_use] +enum MustUse { Test } + +#[must_use = "some message"] +enum MustUseMsg { Test2 } + +fn foo<T>() -> T { panic!() } + +fn bar() -> isize { return foo::<isize>(); } +fn baz() -> MustUse { return foo::<MustUse>(); } +fn qux() -> MustUseMsg { return foo::<MustUseMsg>(); } + +#[allow(unused_results)] +fn test() { + foo::<isize>(); + foo::<MustUse>(); //~ ERROR: unused `MustUse` that must be used + foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` that must be used + //~^ NOTE: some message +} + +#[allow(unused_results, unused_must_use)] +fn test2() { + foo::<isize>(); + foo::<MustUse>(); + foo::<MustUseMsg>(); +} + +fn main() { + foo::<isize>(); //~ ERROR: unused result of type `isize` + foo::<MustUse>(); //~ ERROR: unused `MustUse` that must be used + foo::<MustUseMsg>(); //~ ERROR: unused `MustUseMsg` that must be used + //~^ NOTE: some message + + let _ = foo::<isize>(); + let _ = foo::<MustUse>(); + let _ = foo::<MustUseMsg>(); +} |