[rustc.git] / src / test / ui / specialization / min_specialization / specialize_on_trait.rs

// Test that specializing on a trait is not allowed in general.

#![feature(min_specialization)]

trait SpecMarker {}

trait X {
    fn f();
}

impl<T> X for T {
    default fn f() {}
}

impl<T: SpecMarker> X for T {
    //~^ ERROR cannot specialize on trait `SpecMarker`
    fn f() {}
}

fn main() {}
Commit	Line	Data
ba9703b0 XL	1	// Test that specializing on a trait is not allowed in general.
	2
	3	#![feature(min_specialization)]
	4
	5	trait SpecMarker {}
	6
	7	trait X {
	8	fn f();
	9	}
	10
	11	impl<T> X for T {
	12	default fn f() {}
	13	}
	14
	15	impl<T: SpecMarker> X for T {
	16	//~^ ERROR cannot specialize on trait `SpecMarker`
	17	fn f() {}
	18	}
	19
	20	fn main() {}