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

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// -*- rust -*-
type compare<T> = fn(&T, &T) -> bool;
fn test_generic<T>(expected: &T, eq: &compare<T>) {
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let actual: T = alt true { true { expected } };
assert (eq(expected, actual));
}
fn test_bool() {
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fn compare_bool(b1: &bool, b2: &bool) -> bool { ret b1 == b2; }
let eq = bind compare_bool(_, _);
test_generic::<bool>(true, eq);
}
fn test_rec() {
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type t = {a: int, b: int};
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fn compare_rec(t1: &t, t2: &t) -> bool { ret t1 == t2; }
let eq = bind compare_rec(_, _);
test_generic::<t>({a: 1, b: 2}, eq);
}
fn main() { test_bool(); test_rec(); }