mirror of https://github.com/rust-lang/rust
24 lines
531 B
Rust
24 lines
531 B
Rust
//@ run-pass
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//@ pretty-expanded FIXME #23616
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pub trait OpInt { fn call(&mut self, _: isize, _: isize) -> isize; }
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impl<F> OpInt for F where F: FnMut(isize, isize) -> isize {
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fn call(&mut self, a:isize, b:isize) -> isize {
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(*self)(a, b)
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}
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}
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fn squarei<'a>(x: isize, op: &'a mut dyn OpInt) -> isize { op.call(x, x) }
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fn muli(x:isize, y:isize) -> isize { x * y }
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pub fn main() {
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let mut f = |x, y| muli(x, y);
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{
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let g = &mut f;
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let h = g as &mut dyn OpInt;
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squarei(3, h);
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}
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}
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