File: const-fn-not-safe-for-const.rs

package info (click to toggle)
rustc 1.87.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 925,564 kB
  • sloc: xml: 158,127; python: 36,039; javascript: 19,761; sh: 19,737; cpp: 18,981; ansic: 13,133; asm: 4,376; makefile: 710; perl: 29; lisp: 28; ruby: 19; sql: 11
file content (33 lines) | stat: -rw-r--r-- 441 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
// Test that we can't call random fns in a const fn or do other bad things.

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
}

const fn get_Y_addr() -> &'static u32 {
    &Y
}

const fn get() -> u32 {
    let x = 22;
    let y = 44;
    x + y
}

fn main() {}