mirror of https://github.com/rust-lang/rust
32 lines
692 B
Rust
32 lines
692 B
Rust
//@ run-pass
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//@ pretty-expanded FIXME #23616
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#![feature(fn_traits, unboxed_closures)]
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trait Foo { fn dummy(&self) { }} //~ WARN method `dummy` is never used
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struct Bar;
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impl<'a> std::ops::Fn<(&'a (dyn Foo+'a),)> for Bar {
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extern "rust-call" fn call(&self, _: (&'a dyn Foo,)) {}
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}
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impl<'a> std::ops::FnMut<(&'a (dyn Foo+'a),)> for Bar {
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extern "rust-call" fn call_mut(&mut self, a: (&'a dyn Foo,)) { self.call(a) }
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}
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impl<'a> std::ops::FnOnce<(&'a (dyn Foo+'a),)> for Bar {
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type Output = ();
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extern "rust-call" fn call_once(self, a: (&'a dyn Foo,)) { self.call(a) }
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}
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struct Baz;
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impl Foo for Baz {}
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fn main() {
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let bar = Bar;
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let baz = &Baz;
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bar(baz);
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}
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