rust/src/test/run-pass/expr-alt-generic.rs

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// xfail-fast
// -*- rust -*-
#[legacy_modes];

type compare<T> = fn@(T, T) -> bool;

fn test_generic<T:Copy>(expected: T, eq: compare<T>) {
  let actual: T = match true { true => { expected }, _ => fail!(~"wat") };
    assert (eq(expected, actual));
}

fn test_bool() {
    fn compare_bool(&&b1: bool, &&b2: bool) -> bool { return b1 == b2; }
    test_generic::<bool>(true, compare_bool);
}

struct Pair { a: int, b: int }

fn test_rec() {
    fn compare_rec(t1: Pair, t2: Pair) -> bool {
        t1.a == t2.a && t1.b == t2.b
    }
    test_generic::<Pair>(Pair {a: 1, b: 2}, compare_rec);
}

pub fn main() { test_bool(); test_rec(); }