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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-fnmut-as-fnonce.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-fnmut-as-fnonce.rs')
-rw-r--r-- | src/test/ui/unboxed-closures/unboxed-closures-fnmut-as-fnonce.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/unboxed-closures/unboxed-closures-fnmut-as-fnonce.rs b/src/test/ui/unboxed-closures/unboxed-closures-fnmut-as-fnonce.rs new file mode 100644 index 000000000..bd577f7c4 --- /dev/null +++ b/src/test/ui/unboxed-closures/unboxed-closures-fnmut-as-fnonce.rs @@ -0,0 +1,33 @@ +// run-pass +// Checks that the Fn trait hierarchy rules permit +// FnMut or FnOnce to be used where FnMut is implemented. + +#![feature(unboxed_closures, fn_traits)] + +struct S; + +impl FnMut<(i32,)> for S { + extern "rust-call" fn call_mut(&mut self, (x,): (i32,)) -> i32 { + x * x + } +} + +impl FnOnce<(i32,)> for S { + type Output = i32; + + extern "rust-call" fn call_once(mut self, args: (i32,)) -> i32 { self.call_mut(args) } +} + +fn call_it_mut<F:FnMut(i32)->i32>(f: &mut F, x: i32) -> i32 { + f(x) +} + +fn call_it_once<F:FnOnce(i32)->i32>(f: F, x: i32) -> i32 { + f(x) +} + +fn main() { + let y = call_it_mut(&mut S, 22); + let z = call_it_once(S, 22); + assert_eq!(y, z); +} |