mirror of https://github.com/rust-lang/rust
28 lines
443 B
Rust
28 lines
443 B
Rust
//@ run-pass
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#![feature(unsized_fn_params)]
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use std::ops;
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use std::ops::Index;
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pub struct A;
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impl ops::Index<str> for A {
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type Output = ();
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fn index(&self, _: str) -> &Self::Output {
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&()
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}
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}
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impl ops::IndexMut<str> for A {
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fn index_mut(&mut self, _: str) -> &mut Self::Output {
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panic!()
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}
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}
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fn main() {
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let a = A {};
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let s = String::new().into_boxed_str();
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assert_eq!(&(), a.index(*s));
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}
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