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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs')
-rw-r--r-- | tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs b/tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs new file mode 100644 index 000000000..4ac07123d --- /dev/null +++ b/tests/ui/functions-closures/implied-bounds-closure-arg-outlives.rs @@ -0,0 +1,35 @@ +// run-pass +// Test that we are able to handle the relationships between free +// regions bound in a closure callback. + +#[derive(Copy, Clone)] +struct MyCx<'short, 'long: 'short> { + short: &'short u32, + long: &'long u32, +} + +impl<'short, 'long> MyCx<'short, 'long> { + fn short(self) -> &'short u32 { self.short } + fn long(self) -> &'long u32 { self.long } + fn set_short(&mut self, v: &'short u32) { self.short = v; } +} + +fn with<F, R>(op: F) -> R +where + F: for<'short, 'long> FnOnce(MyCx<'short, 'long>) -> R, +{ + op(MyCx { + short: &22, + long: &22, + }) +} + +fn main() { + with(|mut cx| { + // For this to type-check, we need to be able to deduce that + // the lifetime of `l` can be `'short`, even though it has + // input from `'long`. + let l = if true { cx.long() } else { cx.short() }; + cx.set_short(l); + }); +} |