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15 lines
328 B
Rust
15 lines
328 B
Rust
#![feature(unboxed_closures, tuple_trait)]
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fn to_fn_once<A:std::marker::Tuple,F:FnOnce<A>>(f: F) -> F { f }
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fn do_it(x: &isize) { }
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fn main() {
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let x: Box<_> = Box::new(22);
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let f = to_fn_once(move|| do_it(&*x));
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to_fn_once(move|| {
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f();
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f();
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//~^ ERROR: use of moved value: `f`
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})()
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}
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