mirror of https://github.com/rust-lang/rust
34 lines
550 B
Rust
34 lines
550 B
Rust
pub trait Element<S> {
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type Array;
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}
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impl<T> Element<()> for T {
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type Array = T;
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}
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impl<T: Element<S>, S> Element<[S; 3]> for T {
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type Array = [T::Array; 3];
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}
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trait Foo<I>
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where
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u8: Element<I>,
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{
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fn foo(self, x: <u8 as Element<I>>::Array);
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}
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impl<I> Foo<I> for u16
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where
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u8: Element<I>,
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{
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fn foo(self, _: <u8 as Element<I>>::Array) {}
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}
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fn main() {
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let b: [u8; 3] = [0u8; 3];
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0u16.foo(b); //~ ERROR type annotations needed
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//~^ ERROR type annotations needed
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//<u16 as Foo<[(); 3]>>::foo(0u16, b);
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}
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