rust/tests/ui/stability-attribute/const-stability-attribute-implies-using-stable.rs

//@ aux-build:const-stability-attribute-implies.rs
#![crate_type = "lib"]
#![deny(stable_features)]
#![feature(const_foo)]
//~^ ERROR the feature `const_foo` has been partially stabilized since 1.62.0 and is succeeded by the feature `const_foobar`

// Tests that the use of `implied_by` in the `#[rustc_const_unstable]` attribute results in a
// diagnostic mentioning partial stabilization, and that given the implied unstable feature is
// unused (there is no `foobar` call), that the compiler suggests removing the flag.

extern crate const_stability_attribute_implies;
use const_stability_attribute_implies::foo;

pub const fn bar() -> u32 {
    foo();
    0
}

pub const VAR: u32 = bar();