14 lines
261 B
Rust
14 lines
261 B
Rust
// run-pass
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use std::ops::FnMut;
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fn make_adder(x: isize) -> Box<dyn FnMut(isize)->isize + 'static> {
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Box::new(move |y| { x + y })
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}
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pub fn main() {
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let mut adder = make_adder(3);
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let z = (*adder)(2);
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println!("{}", z);
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assert_eq!(z, 5);
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}
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