tests/ui/stability-attribute/missing-const-stability.rs

//@ compile-flags: -Znext-solver
#![feature(staged_api)]
#![feature(const_trait_impl, rustc_attrs, intrinsics)]
#![stable(feature = "stable", since = "1.0.0")]

#[stable(feature = "stable", since = "1.0.0")]
pub const fn foo() {} //~ ERROR function has missing const stability attribute

#[unstable(feature = "unstable", issue = "none")]
pub const fn bar() {} // ok because function is unstable

#[stable(feature = "stable", since = "1.0.0")]
pub struct Foo;
impl Foo {
    #[stable(feature = "stable", since = "1.0.0")]
    pub const fn foo() {} //~ ERROR associated function has missing const stability attribute

    #[unstable(feature = "unstable", issue = "none")]
    pub const fn bar() {} // ok because function is unstable
}

#[stable(feature = "stable", since = "1.0.0")]
pub const trait Bar {
//~^ ERROR trait has missing const stability attribute
    #[stable(feature = "stable", since = "1.0.0")]
    fn fun();
}
#[stable(feature = "stable", since = "1.0.0")]
impl const Bar for Foo {
    // ok because all users must enable `const_trait_impl`
    fn fun() {}
}

#[stable(feature = "stable", since = "1.0.0")]
#[rustc_intrinsic]
pub const unsafe fn size_of_val<T>(x: *const T) -> usize { 42 }
//~^ ERROR function has missing const stability attribute

fn main() {}