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Consider `tests/ui/const-generics/generic_const_exprs/issue-102768.stderr`, the error message where it gives additional notes about where the associated type is defined, and how the dead code lint doesn't have an article, like in `tests/ui/lint/dead-code/issue-85255.stderr`. They don't have articles, so it seems unnecessary to have one here.
37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
// Test interaction between unboxed closure sugar and region
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// parameters (should be exactly as if angle brackets were used
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// and regions omitted).
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#![feature(unboxed_closures)]
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#![allow(dead_code)]
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use std::marker;
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trait Foo<'a,T> {
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type Output;
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fn dummy(&'a self) -> &'a (T,Self::Output);
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}
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trait Eq<X: ?Sized> { fn is_of_eq_type(&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 +Eq<A>>() { }
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fn same_type<A,B:Eq<A>>(a: A, b: 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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// Here we specify 'static explicitly in angle-bracket version.
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// Parenthesized winds up getting inferred.
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eq::< dyn Foo<'static, (isize,),Output=()>, dyn Foo(isize) >();
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}
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fn test2(x: &dyn Foo<(isize,),Output=()>, y: &dyn Foo(isize)) {
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//~^ ERROR trait takes 1 lifetime argument but 0 lifetime arguments were supplied
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// Here, the omitted lifetimes are expanded to distinct things.
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same_type(x, y)
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}
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fn main() { }
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