diff --git a/src/test/ui/const-generics/generic_const_exprs/const_eval_resolve_canonical.rs b/src/test/ui/const-generics/generic_const_exprs/const_eval_resolve_canonical.rs new file mode 100644 index 0000000000000..b79bc262d2bac --- /dev/null +++ b/src/test/ui/const-generics/generic_const_exprs/const_eval_resolve_canonical.rs @@ -0,0 +1,29 @@ +// run-pass +#![feature(generic_const_exprs)] +#![allow(incomplete_features)] + +trait Foo { + type Assoc: Default; +} + +impl Foo<0> for () { + type Assoc = u32; +} + +impl Foo<3> for () { + type Assoc = i64; +} + +fn foo(_: T) -> <() as Foo<{ N + 1 }>>::Assoc +where + (): Foo<{ N + 1 }>, +{ + Default::default() +} + +fn main() { + // Test that we can correctly infer `T` which requires evaluating + // `{ N + 1 }` which has substs containing an inference var + let mut _q = Default::default(); + _q = foo::<_, 2>(_q); +}