diff options
Diffstat (limited to 'src/test/ui/associated-types/associated-types-binding-to-type-defined-in-supertrait.rs')
-rw-r--r-- | src/test/ui/associated-types/associated-types-binding-to-type-defined-in-supertrait.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-binding-to-type-defined-in-supertrait.rs b/src/test/ui/associated-types/associated-types-binding-to-type-defined-in-supertrait.rs new file mode 100644 index 000000000..6b2bbbe2e --- /dev/null +++ b/src/test/ui/associated-types/associated-types-binding-to-type-defined-in-supertrait.rs @@ -0,0 +1,35 @@ +// Test equality constraints in a where clause where the type being +// equated appears in a supertrait. + +pub trait Vehicle { + type Color; + + fn go(&self) { } +} + +pub trait Car : Vehicle { + fn honk(&self) { } +} + +struct Black; +struct ModelT; +impl Vehicle for ModelT { type Color = Black; } +impl Car for ModelT { } + +struct Blue; +struct ModelU; +impl Vehicle for ModelU { type Color = Blue; } +impl Car for ModelU { } + +fn black_car<C:Car<Color=Black>>(c: C) { +} + +fn blue_car<C:Car<Color=Blue>>(c: C) { +} + +fn a() { black_car(ModelT); } +fn b() { blue_car(ModelT); } //~ ERROR type mismatch +fn c() { black_car(ModelU); } //~ ERROR type mismatch +fn d() { blue_car(ModelU); } + +pub fn main() { } |