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https://github.com/rust-lang/rust
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35 lines
681 B
Rust
35 lines
681 B
Rust
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#![feature(associated_type_defaults)]
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// Tests that a trait with one defaulted and one non-defaulted assoc. type behaves properly.
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trait Trait {
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type Foo = u8;
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type Bar;
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}
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// `Bar` must be specified
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impl Trait for () {}
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//~^ error: not all trait items implemented, missing: `Bar`
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impl Trait for bool {
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//~^ error: not all trait items implemented, missing: `Bar`
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type Foo = ();
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}
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impl Trait for u8 {
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type Bar = ();
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}
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impl Trait for u16 {
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type Foo = String;
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type Bar = bool;
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}
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fn main() {
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let _: <u8 as Trait>::Foo = 0u8;
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let _: <u8 as Trait>::Bar = ();
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let _: <u16 as Trait>::Foo = String::new();
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let _: <u16 as Trait>::Bar = true;
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}
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