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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-20763-1.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-20763-1.rs b/src/test/ui/issues/issue-20763-1.rs new file mode 100644 index 000000000..858d313fc --- /dev/null +++ b/src/test/ui/issues/issue-20763-1.rs @@ -0,0 +1,29 @@ +// check-pass +#![allow(dead_code)] +// pretty-expanded FIXME #23616 + +trait T0 { + type O; + fn dummy(&self) { } +} + +struct S<A>(A); +impl<A> T0 for S<A> { type O = A; } + +trait T1: T0 { + // this looks okay but as we see below, `f` is unusable + fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool; +} + +// complains about the bounds on F here not being required by the trait +impl<A> T1 for S<A> { + fn m0<F: Fn(A) -> bool>(self, f: F) -> bool { f(self.0) } +} + +// // complains about mismatched types: <S<A> as T0>::O vs. A +// impl<A> T1 for S<A> +// { +// fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool { f(self.0) } +// } + +fn main() { } |