// run-pass #![allow(unused_braces)] fn test_generic(expected: T, eq: F) where F: FnOnce(T, T) -> bool { let actual: T = { expected.clone() }; assert!(eq(expected, actual)); } fn test_bool() { fn compare_bool(b1: bool, b2: bool) -> bool { return b1 == b2; } test_generic::(true, compare_bool); } #[derive(Clone)] struct Pair { a: isize, b: isize, } fn test_rec() { fn compare_rec(t1: Pair, t2: Pair) -> bool { t1.a == t2.a && t1.b == t2.b } test_generic::(Pair {a: 1, b: 2}, compare_rec); } pub fn main() { test_bool(); test_rec(); }