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#![feature(associated_type_defaults)] | ||
#![feature(generic_associated_types)] | ||
#![allow(incomplete_features)] | ||
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trait Trait1 { | ||
fn foo(); | ||
} | ||
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trait Trait2 { | ||
type Associated: Trait1 = Self; | ||
//~^ ERROR: the trait bound `Self: Trait1` is not satisfied | ||
//~| the size for values of type `Self` cannot be known | ||
} | ||
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impl Trait2 for () {} | ||
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fn call_foo<T: Trait2>() { | ||
T::Associated::foo() | ||
} | ||
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fn main() { | ||
call_foo::<()>() | ||
} |
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error[E0277]: the trait bound `Self: Trait1` is not satisfied | ||
--> $DIR/issue-74816.rs:10:5 | ||
| | ||
LL | type Associated: Trait1 = Self; | ||
| ^^^^^^^^^^^^^^^^^------^^^^^^^^ | ||
| | | | ||
| | required by this bound in `Trait2::Associated` | ||
| the trait `Trait1` is not implemented for `Self` | ||
| | ||
help: consider further restricting `Self` | ||
| | ||
LL | trait Trait2: Trait1 { | ||
| ^^^^^^^^ | ||
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error[E0277]: the size for values of type `Self` cannot be known at compilation time | ||
--> $DIR/issue-74816.rs:10:5 | ||
| | ||
LL | type Associated: Trait1 = Self; | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
| | | ||
| doesn't have a size known at compile-time | ||
| required by this bound in `Trait2::Associated` | ||
| | ||
help: consider further restricting `Self` | ||
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LL | trait Trait2: Sized { | ||
| ^^^^^^^ | ||
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error: aborting due to 2 previous errors | ||
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For more information about this error, try `rustc --explain E0277`. |