File: feature-gate-const_extern_fn.rs

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// Check that `const extern fn` and `const unsafe extern fn` are feature-gated
// for certain ABIs.

const extern fn foo1() {}
const extern "C" fn foo2() {}
const extern "Rust" fn foo3() {}
const extern "cdecl" fn foo4() {} //~ ERROR `cdecl` as a `const fn` ABI is unstable
const unsafe extern fn bar1() {}
const unsafe extern "C" fn bar2() {}
const unsafe extern "Rust" fn bar3() {}
const unsafe extern "cdecl" fn bar4() {} //~ ERROR `cdecl` as a `const fn` ABI is unstable

fn main() {}