mirror of https://github.com/rust-lang/rust
40 lines
1.2 KiB
Rust
40 lines
1.2 KiB
Rust
// Check projection of an associated type out of a higher-ranked trait-bound
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// in the context of a struct definition.
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pub trait Foo<T> {
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type A;
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fn get(&self, t: T) -> Self::A;
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}
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struct SomeStruct<I: for<'x> Foo<&'x isize>> {
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field: I::A
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//~^ ERROR cannot use the associated type of a trait with uninferred generic parameters
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}
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enum SomeEnum<'b, I: for<'a> Foo<&'a isize>> {
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TupleVariant(I::A),
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//~^ ERROR cannot use the associated type of a trait with uninferred generic parameters
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StructVariant { field: I::A },
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//~^ ERROR cannot use the associated type of a trait with uninferred generic parameters
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OkVariant(&'b usize),
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}
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// FIXME(eddyb) This one doesn't even compile because of the unsupported syntax.
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// struct AnotherStruct<I : for<'x> Foo<&'x isize>> {
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// field: <I as for<'y> Foo<&'y isize>>::A
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// }
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struct YetAnotherStruct<'a, I: for<'x> Foo<&'x isize>> {
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field: <I as Foo<&'a isize>>::A,
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}
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struct Why<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, 'i, 'j, 'k, 'n, 'o, 'p, 'q, 'r, 's, 't, 'u, 'v, 'w, 'x,
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'y, 'z, 'aa, I: for<'l, 'm> Foo<&'l &'m isize>> {
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field: I::A,
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//~^ ERROR cannot use the associated type of a trait with uninferred generic parameters
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}
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pub fn main() {}
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