rust/src/test/run-pass/expr-if-generic.rs
2011-09-26 22:00:15 -07:00

29 lines
690 B
Rust

// -*- rust -*-
// Tests for if as expressions with dynamic type sizes
type compare<T> = fn(T, T) -> bool;
fn test_generic<@T>(expected: T, not_expected: T, eq: compare<T>) {
let actual: T = if true { expected } else { not_expected };
assert (eq(expected, actual));
}
fn test_bool() {
fn compare_bool(b1: bool, b2: bool) -> bool { ret b1 == b2; }
let eq = bind compare_bool(_, _);
test_generic::<bool>(true, false, eq);
}
fn test_rec() {
type t = {a: int, b: int};
fn compare_rec(t1: t, t2: t) -> bool { ret t1 == t2; }
let eq = bind compare_rec(_, _);
test_generic::<t>({a: 1, b: 2}, {a: 2, b: 3}, eq);
}
fn main() { test_bool(); test_rec(); }