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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/unboxed-closures/unboxed-closures-extern-fn.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/unboxed-closures/unboxed-closures-extern-fn.rs')
-rw-r--r-- | src/test/ui/unboxed-closures/unboxed-closures-extern-fn.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-extern-fn.rs b/src/test/ui/unboxed-closures/unboxed-closures-extern-fn.rs new file mode 100644 index 000000000..677cd259a --- /dev/null +++ b/src/test/ui/unboxed-closures/unboxed-closures-extern-fn.rs @@ -0,0 +1,27 @@ +// run-pass +// Checks that extern fn pointers implement the full range of Fn traits. + +use std::ops::{Fn,FnMut,FnOnce}; + +fn square(x: isize) -> isize { x * x } + +fn call_it<F:Fn(isize)->isize>(f: &F, x: isize) -> isize { + f(x) +} + +fn call_it_mut<F:FnMut(isize)->isize>(f: &mut F, x: isize) -> isize { + f(x) +} + +fn call_it_once<F:FnOnce(isize)->isize>(f: F, x: isize) -> isize { + f(x) +} + +fn main() { + let x = call_it(&square, 22); + let y = call_it_mut(&mut square, 22); + let z = call_it_once(square, 22); + assert_eq!(x, square(22)); + assert_eq!(y, square(22)); + assert_eq!(z, square(22)); +} |