File: const-fn-error.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb12u2
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,517,048 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (19 lines) | stat: -rw-r--r-- 441 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
const X : usize = 2;

const fn f(x: usize) -> usize {
    let mut sum = 0;
    for i in 0..x {
        //~^ ERROR cannot convert
        //~| ERROR `for` is not allowed in a `const fn`
        //~| ERROR mutable references are not allowed in constant functions
        //~| ERROR cannot call non-const fn
        //~| ERROR the trait bound
        sum += i;
    }
    sum
}

#[allow(unused_variables)]
fn main() {
    let a : [i32; f(X)];
}