mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-11 08:05:12 +00:00
16 lines
590 B
Rust
16 lines
590 B
Rust
#![feature(generic_const_items)]
|
|
#![allow(incomplete_features)]
|
|
|
|
// Check that we emit a *hard* error (not just a lint warning or error for example) for generic
|
|
// parameter defaults on free const items since we are not limited by backward compatibility.
|
|
#![allow(invalid_type_param_default)] // Should have no effect here.
|
|
|
|
// FIXME(default_type_parameter_fallback): Consider reallowing them once they work properly.
|
|
|
|
const NONE<T = ()>: Option<T> = None::<T>; //~ ERROR defaults for type parameters are only allowed
|
|
|
|
fn main() {
|
|
let _ = NONE;
|
|
//~^ ERROR type annotations needed
|
|
}
|