mirror of https://github.com/rust-lang/rust
22 lines
384 B
Rust
22 lines
384 B
Rust
//@ run-pass
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#![allow(non_camel_case_types)]
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struct closure_box<'a> {
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cl: Box<dyn FnMut() + 'a>,
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}
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fn box_it<'a>(x: Box<dyn FnMut() + 'a>) -> closure_box<'a> {
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closure_box {cl: x}
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}
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pub fn main() {
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let mut i = 3;
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assert_eq!(i, 3);
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{
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let cl = || i += 1;
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let mut cl_box = box_it(Box::new(cl));
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(cl_box.cl)();
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}
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assert_eq!(i, 4);
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}
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