32 lines
738 B
Rust
32 lines
738 B
Rust
//@ run-pass
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// Tests that nested vtables work with overloaded calls.
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//@ pretty-expanded FIXME #23616
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#![feature(unboxed_closures, fn_traits)]
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use std::marker::PhantomData;
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use std::ops::Add;
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struct G<A>(PhantomData<A>);
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impl<'a, A: Add<i32, Output=i32>> Fn<(A,)> for G<A> {
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extern "rust-call" fn call(&self, (arg,): (A,)) -> i32 {
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arg.add(1)
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}
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}
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impl<'a, A: Add<i32, Output=i32>> FnMut<(A,)> for G<A> {
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extern "rust-call" fn call_mut(&mut self, args: (A,)) -> i32 { self.call(args) }
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}
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impl<'a, A: Add<i32, Output=i32>> FnOnce<(A,)> for G<A> {
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type Output = i32;
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extern "rust-call" fn call_once(self, args: (A,)) -> i32 { self.call(args) }
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}
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fn main() {
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// ICE trigger
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(G(PhantomData))(1);
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}
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