20 lines
454 B
Rust
20 lines
454 B
Rust
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// -*- rust -*-
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fn checktrue(rs: bool) -> bool { assert (rs); ret true; }
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fn main() { let k = checktrue; evenk(42, k); oddk(45, k); }
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fn evenk(n: int, k: native fn(bool) -> bool) -> bool {
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#debug("evenk");
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log(debug, n);
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if n == 0 { ret k(true); } else { ret oddk(n - 1, k); }
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}
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fn oddk(n: int, k: native fn(bool) -> bool) -> bool {
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#debug("oddk");
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log(debug, n);
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if n == 0 { ret k(false); } else { ret evenk(n - 1, k); }
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}
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