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//@ revisions: spec min_spec
#![feature(const_trait_impl)]
#![cfg_attr(spec, feature(specialization))]
//[spec]~^ WARN the feature `specialization` is incomplete
#![cfg_attr(min_spec, feature(min_specialization))]
#[const_trait]
trait Bar {}
impl<T> const Bar for T {}
#[const_trait]
trait Foo {
fn method(&self);
}
impl<T> const Foo for T
where
T: ~const Bar,
{
default fn method(&self) {}
}
// specializing impl:
impl<T> Foo for (T,) {
//~^ ERROR conflicting implementations
fn method(&self) {
println!("hi");
}
}
const fn dispatch<T: ~const Bar + Copy>(t: T) {
t.method();
}
fn main() {
const {
dispatch(((),));
}
}
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