rust/src/test/run-pass/fact.rs

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// -*- rust -*-
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fn f(x: int) -> int {
// #debug("in f:");
log(debug, x);
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if x == 1 {
// #debug("bottoming out");
ret 1;
} else {
// #debug("recurring");
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let y: int = x * f(x - 1);
// #debug("returned");
log(debug, y);
ret y;
}
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}
fn main() {
assert (f(5) == 120);
// #debug("all done");
}