rust/src/test/ui/consts/const-fn-not-safe-for-const.rs

// Test that we can't call random fns in a const fn or do other bad things.

#![feature(const_fn, const_transmute)]

use std::mem::transmute;

fn random() -> u32 { 0 }

const fn sub(x: &u32) -> usize {
    unsafe { transmute(x) }
}

const fn sub1() -> u32 {
    random() //~ ERROR E0015
}

static Y: u32 = 0;

const fn get_Y() -> u32 {
    Y
        //~^ ERROR E0013
}

const fn get_Y_addr() -> &'static u32 {
    &Y
        //~^ ERROR E0013
}

const fn get() -> u32 {
    let x = 22; //~ ERROR let bindings in constant functions are unstable
//~^ ERROR statements in constant functions
    let y = 44; //~ ERROR let bindings in constant functions are unstable
//~^ ERROR statements in constant functions
    x + y
//~^ ERROR let bindings in constant functions are unstable
//~| ERROR let bindings in constant functions are unstable
}

fn main() {}