diff options
Diffstat (limited to 'tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs')
-rw-r--r-- | tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs b/tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs new file mode 100644 index 000000000..f67b073c5 --- /dev/null +++ b/tests/ui/traits/next-solver/param-candidate-doesnt-shadow-project.rs @@ -0,0 +1,25 @@ +// compile-flags: -Znext-solver +// check-pass + +trait Foo { + type Assoc; +} + +trait Bar {} + +impl<T> Foo for T { + type Assoc = i32; +} + +impl<T> Bar for T where T: Foo<Assoc = i32> {} + +fn require_bar<T: Bar>() {} + +fn foo<T: Foo>() { + // Unlike the classic solver, `<T as Foo>::Assoc = _` will still project + // down to `i32` even though there's a param-env candidate here, since we + // don't assemble any param-env projection candidates for `T: Foo` alone. + require_bar::<T>(); +} + +fn main() {} |