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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/extern/extern-compare-with-return-type.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/extern/extern-compare-with-return-type.rs')
-rw-r--r-- | src/test/ui/extern/extern-compare-with-return-type.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/extern/extern-compare-with-return-type.rs b/src/test/ui/extern/extern-compare-with-return-type.rs new file mode 100644 index 000000000..42693d3a0 --- /dev/null +++ b/src/test/ui/extern/extern-compare-with-return-type.rs @@ -0,0 +1,27 @@ +// run-pass + +// Tests that we can compare various kinds of extern fn signatures. +#![allow(non_camel_case_types)] + +// `dbg!()` differentiates these functions to ensure they won't be merged. +extern "C" fn voidret1() { dbg!() } +extern "C" fn voidret2() { dbg!() } + +extern "C" fn uintret() -> usize { 22 } + +extern "C" fn uintvoidret(_x: usize) {} + +extern "C" fn uintuintuintuintret(x: usize, y: usize, z: usize) -> usize { x+y+z } +type uintuintuintuintret = extern "C" fn(usize,usize,usize) -> usize; + +pub fn main() { + assert!(voidret1 as extern "C" fn() == voidret1 as extern "C" fn()); + assert!(voidret1 as extern "C" fn() != voidret2 as extern "C" fn()); + + assert!(uintret as extern "C" fn() -> usize == uintret as extern "C" fn() -> usize); + + assert!(uintvoidret as extern "C" fn(usize) == uintvoidret as extern "C" fn(usize)); + + assert!(uintuintuintuintret as uintuintuintuintret == + uintuintuintuintret as uintuintuintuintret); +} |