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// This issue tests fn_traits overloading on arity.
//@ run-pass
#![feature(fn_traits)]
#![feature(unboxed_closures)]
struct Foo;
impl Fn<(isize, isize)> for Foo {
extern "rust-call" fn call(&self, args: (isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 1, args.1 + 1)
}
}
impl FnMut<(isize, isize)> for Foo {
extern "rust-call" fn call_mut(&mut self, args: (isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 1, args.1 + 1)
}
}
impl FnOnce<(isize, isize)> for Foo {
type Output = (isize, isize);
extern "rust-call" fn call_once(self, args: (isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 1, args.1 + 1)
}
}
impl Fn<(isize, isize, isize)> for Foo {
extern "rust-call" fn call(&self, args: (isize, isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 3, args.1 + 3, args.2 + 3)
}
}
impl FnMut<(isize, isize, isize)> for Foo {
extern "rust-call" fn call_mut(&mut self, args: (isize, isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 3, args.1 + 3, args.2 + 3)
}
}
impl FnOnce<(isize, isize, isize)> for Foo {
type Output = (isize, isize, isize);
extern "rust-call" fn call_once(self, args: (isize, isize, isize)) -> Self::Output {
println!("{:?}", args);
(args.0 + 3, args.1 + 3, args.2 + 3)
}
}
fn main() {
let foo = Foo;
assert_eq!(foo(1, 1), (2, 2));
assert_eq!(foo(1, 1, 1), (4, 4, 4));
}
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