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