rustc/tests/ui/feature-gates/feature-gate-rust_cold_cc.rs

#![crate_type = "lib"]

extern "rust-cold" fn fu() {} //~ ERROR rust-cold is experimental

trait T {
    extern "rust-cold" fn mu(); //~ ERROR rust-cold is experimental
    extern "rust-cold" fn dmu() {} //~ ERROR rust-cold is experimental
}

struct S;
impl T for S {
    extern "rust-cold" fn mu() {} //~ ERROR rust-cold is experimental
}

impl S {
    extern "rust-cold" fn imu() {} //~ ERROR rust-cold is experimental
}

type TAU = extern "rust-cold" fn(); //~ ERROR rust-cold is experimental

extern "rust-cold" {} //~ ERROR rust-cold is experimental