29 lines
820 B
Rust
29 lines
820 B
Rust
// Test interaction between unboxed closure sugar and default type
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// parameters (should be exactly as if angle brackets were used).
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#![feature(unboxed_closures)]
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#![allow(dead_code)]
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trait Foo<T,V=T> {
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type Output;
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fn dummy(&self, t: T, v: V);
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}
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trait Eq<X: ?Sized> { fn same_types(&self, x: &X) -> bool { true } }
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impl<X: ?Sized> Eq<X> for X { }
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fn eq<A: ?Sized,B: ?Sized>() where A : Eq<B> { }
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fn test<'a,'b>() {
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// Parens are equivalent to omitting default in angle.
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eq::<dyn Foo<(isize,), Output=()>, dyn Foo(isize)>();
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// In angle version, we supply something other than the default
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eq::<dyn Foo<(isize,), isize, Output=()>, dyn Foo(isize)>();
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//~^ ERROR E0277
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// Supply default explicitly.
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eq::<dyn Foo<(isize,), (isize,), Output=()>, dyn Foo(isize)>();
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}
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fn main() { }
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