New upstream version 1.56.0~beta.4+dfsg1

[rustc.git] / src / test / ui / type-alias-impl-trait / generic_nondefining_use.rs

#![feature(type_alias_impl_trait)]

use std::fmt::Debug;

fn main() {}

type OneTy<T> = impl Debug;
type OneLifetime<'a> = impl Debug;
type OneConst<const X: usize> = impl Debug;

// Not defining uses, because they doesn't define *all* possible generics.

fn concrete_ty() -> OneTy<u32> {
    //~^ ERROR non-defining opaque type use in defining scope
    5u32
}

fn concrete_lifetime() -> OneLifetime<'static> {
    //~^ ERROR non-defining opaque type use in defining scope
    6u32
}

fn concrete_const() -> OneConst<{ 123 }> {
    //~^ ERROR non-defining opaque type use in defining scope
    7u32
}