rust/tests/ui/consts/const-vec-of-fns.rs
2024-02-16 20:02:50 +00:00

26 lines
736 B
Rust

//@ run-pass
//@ pretty-expanded FIXME #23616
#![allow(non_upper_case_globals)]
/*!
* Try to double-check that static fns have the right size (with or
* without dummy env ptr, as appropriate) by iterating a size-2 array.
* If the static size differs from the runtime size, the second element
* should be read as a null or otherwise wrong pointer and crash.
*/
fn f() { }
static bare_fns: &'static [fn()] = &[f, f];
struct S<F: FnOnce()>(F);
static mut closures: &'static mut [S<fn()>] = &mut [S(f as fn()), S(f as fn())];
pub fn main() {
unsafe {
for &bare_fn in bare_fns { bare_fn() }
for closure in &mut *closures {
let S(ref mut closure) = *closure;
(*closure)()
}
}
}