mirror of https://github.com/rust-lang/rust
43 lines
895 B
Rust
43 lines
895 B
Rust
#![feature(fn_traits, unboxed_closures)]
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use std::ops::FnMut;
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struct S {
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x: isize,
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y: isize,
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}
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impl FnMut<(isize,)> for S {
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extern "rust-call" fn call_mut(&mut self, (z,): (isize,)) -> isize {
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self.x * self.y * z
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}
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}
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impl FnOnce<(isize,)> for S {
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type Output = isize;
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extern "rust-call" fn call_once(mut self, (z,): (isize,)) -> isize {
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self.call_mut((z,))
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}
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}
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struct F;
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impl FnOnce<(i32,)> for F {
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type Output = ();
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extern "rust-call" fn call_once(self, args: (i32,)) -> Self::Output {}
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}
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fn main() {
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let mut s = S { x: 3, y: 3 };
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let ans = s("what");
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//~^ ERROR mismatched types
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let ans = s();
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//~^ ERROR function takes 1 argument but 0 arguments were supplied
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let ans = s("burma", "shave");
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//~^ ERROR function takes 1 argument but 2 arguments were supplied
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F("");
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//~^ ERROR mismatched types
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}
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