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https://github.com/rust-lang/rust
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30 lines
685 B
Rust
30 lines
685 B
Rust
//@ run-pass
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#![allow(non_camel_case_types)]
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type compare<T> = extern "Rust" fn(T, T) -> bool;
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fn test_generic<T:Clone>(expected: T, eq: compare<T>) {
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let actual: T = match true { true => { expected.clone() }, _ => panic!("wat") };
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assert!((eq(expected, actual)));
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}
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fn test_bool() {
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fn compare_bool(b1: bool, b2: bool) -> bool { return b1 == b2; }
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test_generic::<bool>(true, compare_bool);
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}
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#[derive(Clone)]
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struct Pair {
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a: isize,
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b: isize,
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}
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fn test_rec() {
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fn compare_rec(t1: Pair, t2: Pair) -> bool {
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t1.a == t2.a && t1.b == t2.b
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}
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test_generic::<Pair>(Pair {a: 1, b: 2}, compare_rec);
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}
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pub fn main() { test_bool(); test_rec(); }
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