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https://github.com/rust-lang/rust
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32 lines
748 B
Rust
32 lines
748 B
Rust
// Test overloaded resolution of fn_traits.
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// run-pass
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#![feature(fn_traits)]
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#![feature(unboxed_closures)]
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#[derive(Debug, PartialEq, Eq)]
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struct Ishmael;
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#[derive(Debug, PartialEq, Eq)]
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struct Maybe;
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struct CallMe;
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impl FnOnce<(Ishmael,)> for CallMe {
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type Output = Ishmael;
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extern "rust-call" fn call_once(self, _args: (Ishmael,)) -> Ishmael {
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println!("Split your lungs with blood and thunder!");
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Ishmael
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}
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}
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impl FnOnce<(Maybe,)> for CallMe {
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type Output = Maybe;
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extern "rust-call" fn call_once(self, _args: (Maybe,)) -> Maybe {
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println!("So we just met, and this is crazy");
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Maybe
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}
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}
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fn main() {
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assert_eq!(CallMe(Ishmael), Ishmael);
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assert_eq!(CallMe(Maybe), Maybe);
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}
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