File: old-closure-fn-coerce.rs

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rustc 1.88.0%2Bdfsg1-1
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//@ run-pass
#![allow(unused_braces)]

fn force<F>(f: F) -> isize where F: FnOnce() -> isize { return f(); }

pub fn main() {
    fn f() -> isize { return 7; }
    assert_eq!(force(f), 7);
    let g = {||force(f)};
    assert_eq!(g(), 7);
}