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Diffstat (limited to 'src/test/ui/variance/variance-associated-types.rs')
-rw-r--r-- | src/test/ui/variance/variance-associated-types.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/variance/variance-associated-types.rs b/src/test/ui/variance/variance-associated-types.rs new file mode 100644 index 000000000..1165fb53c --- /dev/null +++ b/src/test/ui/variance/variance-associated-types.rs @@ -0,0 +1,22 @@ +// Test that the variance computation considers types/regions that +// appear in projections to be invariant. + +#![feature(rustc_attrs)] + +trait Trait<'a> { + type Type; + + fn method(&'a self) { } +} + +#[rustc_variance] +struct Foo<'a, T : Trait<'a>> { //~ ERROR [-, +] + field: (T, &'a ()) +} + +#[rustc_variance] +struct Bar<'a, T : Trait<'a>> { //~ ERROR [o, o] + field: <T as Trait<'a>>::Type +} + +fn main() { } |