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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-f7f0cc2a5d72e2c61c1f6900e70eec992bea4273.tar.xz rustc-f7f0cc2a5d72e2c61c1f6900e70eec992bea4273.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs')
-rw-r--r-- | src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs new file mode 100644 index 000000000..8fb4218f8 --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/hrtb-just-for-static.rs @@ -0,0 +1,35 @@ +// Test a case where you have an impl of `Foo<X>` for all `X` that +// is being applied to `for<'a> Foo<&'a mut X>`. Issue #19730. + +trait Foo<X> { + fn foo(&self, x: X) { } +} + +fn want_hrtb<T>() + where T : for<'a> Foo<&'a isize> +{ +} + +// AnyInt implements Foo<&'a isize> for any 'a, so it is a match. +struct AnyInt; +impl<'a> Foo<&'a isize> for AnyInt { } +fn give_any() { + want_hrtb::<AnyInt>() +} + +// StaticInt only implements Foo<&'static isize>, so it is an error. +struct StaticInt; +impl Foo<&'static isize> for StaticInt { } +fn give_static() { + want_hrtb::<StaticInt>() //~ ERROR +} + +// &'a u32 only implements Foo<&'a isize> for specific 'a, so it is an error. +impl<'a> Foo<&'a isize> for &'a u32 { } +fn give_some<'a>() { + want_hrtb::<&'a u32>() + //~^ ERROR lifetime may not live long enough + //~| ERROR implementation of `Foo` is not general enough +} + +fn main() { } |