mirror of https://github.com/rust-lang/rust
28 lines
420 B
Rust
28 lines
420 B
Rust
//@ run-pass
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#![allow(unused_variables)]
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// Test that you can supply `&F` where `F: FnMut()`.
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#![feature(lang_items)]
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fn a<F:FnMut() -> i32>(mut f: F) -> i32 {
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f()
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}
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fn b(f: &mut dyn FnMut() -> i32) -> i32 {
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a(f)
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}
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fn c<F:FnMut() -> i32>(f: &mut F) -> i32 {
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a(f)
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}
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fn main() {
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let z: isize = 7;
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let x = b(&mut || 22);
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assert_eq!(x, 22);
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let x = c(&mut || 22);
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assert_eq!(x, 22);
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}
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