diff options
Diffstat (limited to 'tests/ui/regions/regions-outlives-projection-trait-def.rs')
-rw-r--r-- | tests/ui/regions/regions-outlives-projection-trait-def.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/regions/regions-outlives-projection-trait-def.rs b/tests/ui/regions/regions-outlives-projection-trait-def.rs new file mode 100644 index 000000000..5c37a585a --- /dev/null +++ b/tests/ui/regions/regions-outlives-projection-trait-def.rs @@ -0,0 +1,21 @@ +// Test that `<F as Foo<'a>>::Type: 'b`, where `trait Foo<'a> { Type: +// 'a; }`, does not require that `F: 'b`. + +// check-pass +#![allow(dead_code)] + +trait SomeTrait<'a> { + type Type: 'a; +} + +impl<'a: 'c, 'c, T> SomeTrait<'a> for &'c T where T: SomeTrait<'a> { + type Type = <T as SomeTrait<'a>>::Type; + // ~~~~~~~~~~~~~~~~~~~~~~~~~~ + // | + // Note that this type must outlive 'a, due to the trait + // definition. If we fall back to OutlivesProjectionComponents + // here, then we would require that `T:'a`, which is too strong. +} + + +fn main() { } |