mirror of https://github.com/rust-lang/rust
42 lines
810 B
Rust
42 lines
810 B
Rust
//@ run-pass
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#![allow(unused_variables)]
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#![allow(unused_imports)]
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// Test that we don't trigger on the blanket impl for all `&'a T` but
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// rather keep autoderefing and trigger on the underlying impl. To
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// know not to stop at the blanket, we have to recursively evaluate
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// the `T:Foo` bound.
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//@ pretty-expanded FIXME #23616
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use std::marker::Sized;
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// Note: this must be generic for the problem to show up
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trait Foo<A> { //~ WARN trait `Foo` is never used
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fn foo(&self, a: A);
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}
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impl Foo<u8> for [u8] {
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fn foo(&self, a: u8) {}
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}
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impl<'a, A, T> Foo<A> for &'a T where T: Foo<A> {
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fn foo(&self, a: A) {
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Foo::foo(*self, a)
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}
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}
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trait Bar {
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fn foo(&self);
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}
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struct MyType;
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impl Bar for MyType {
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fn foo(&self) {}
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}
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fn main() {
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let mut m = MyType;
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(&mut m).foo()
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}
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