File: unboxed-closures-blanket-fn.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 (27 lines) | stat: -rw-r--r-- 388 bytes parent folder | download | duplicates (16) 
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
 
//@ run-pass
#![allow(unused_variables)]
// Test that you can supply `&F` where `F: Fn()`.

#![feature(lang_items)]

fn a<F:Fn() -> i32>(f: F) -> i32 {
    f()
}

fn b(f: &dyn Fn() -> i32) -> i32 {
    a(f)
}

fn c<F:Fn() -> i32>(f: &F) -> i32 {
    a(f)
}

fn main() {
    let z: isize = 7;

    let x = b(&|| 22);
    assert_eq!(x, 22);

    let x = c(&|| 22);
    assert_eq!(x, 22);
}