File: borrowck-unboxed-closures.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (17 lines) | stat: -rw-r--r-- 428 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
fn a<F:Fn(isize, isize) -> isize>(mut f: F) {
    let g = &mut f;
    f(1, 2);    //~ ERROR cannot borrow `f` as immutable
    use_mut(g);
}
fn b<F:FnMut(isize, isize) -> isize>(f: F) {
    f(1, 2);    //~ ERROR cannot borrow `f` as mutable, as it is not declared as mutable
}

fn c<F:FnOnce(isize, isize) -> isize>(f: F) {
    f(1, 2);
    f(1, 2);    //~ ERROR use of moved value
}

fn main() {}

fn use_mut<T>(_: &mut T) { }