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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:06:37 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:06:37 +0000 |
commit | 246f239d9f40f633160f0c18f87a20922d4e77bb (patch) | |
tree | 5a88572663584b3d4d28e5a20e10abab1be40884 /src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs | |
parent | Releasing progress-linux version 1.64.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-246f239d9f40f633160f0c18f87a20922d4e77bb.tar.xz rustc-246f239d9f40f633160f0c18f87a20922d4e77bb.zip |
Merging debian version 1.65.0+dfsg1-2.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs')
-rw-r--r-- | src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs new file mode 100644 index 000000000..e83686404 --- /dev/null +++ b/src/test/ui/higher-rank-trait-bounds/hrtb-conflate-regions.rs @@ -0,0 +1,31 @@ +// Test that an impl with only one bound region `'a` cannot be used to +// satisfy a constraint where there are two bound regions. + +trait Foo<X> { + fn foo(&self, x: X) { } +} + +fn want_foo2<T>() + where T : for<'a,'b> Foo<(&'a isize, &'b isize)> +{ +} + +fn want_foo1<T>() + where T : for<'z> Foo<(&'z isize, &'z isize)> +{ +} + +// Expressed as a where clause + +struct SomeStruct; + +impl<'a> Foo<(&'a isize, &'a isize)> for SomeStruct +{ +} + +fn a() { want_foo1::<SomeStruct>(); } // OK -- foo wants just one region +fn b() { want_foo2::<SomeStruct>(); } +//~^ ERROR implementation of +//~| ERROR implementation of + +fn main() { } |