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//@ check-pass
use std::ptr;
// see https://github.com/rust-lang/rust/issues/125833
// notionally, taking the address of an extern static is a safe operation,
// as we only point at it instead of generating a true reference to it
// it may potentially induce linker errors, but the safety of that is not about taking addresses!
// any safety obligation of the extern static's correctness in declaration is on the extern itself,
// see RFC 3484 for more on that: https://rust-lang.github.io/rfcs/3484-unsafe-extern-blocks.html
extern "C" {
static THERE: u8;
static mut SOMEWHERE: u8;
}
fn main() {
let ptr2there = ptr::addr_of!(THERE);
let ptr2somewhere = ptr::addr_of!(SOMEWHERE);
let ptr2somewhere = ptr::addr_of_mut!(SOMEWHERE);
// testing both addr_of and the expression it directly expands to
let raw2there = &raw const THERE;
let raw2somewhere = &raw const SOMEWHERE;
let raw2somewhere = &raw mut SOMEWHERE;
}
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