26 lines
925 B
Rust
26 lines
925 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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fn checktrue(rs: bool) -> bool { assert!((rs)); return true; }
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pub fn main() { let k = checktrue; evenk(42, k); oddk(45, k); }
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fn evenk(n: isize, k: fn(bool) -> bool) -> bool {
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println!("evenk");
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println!("{}", n);
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if n == 0 { return k(true); } else { return oddk(n - 1, k); }
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}
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fn oddk(n: isize, k: fn(bool) -> bool) -> bool {
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println!("oddk");
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println!("{}", n);
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if n == 0 { return k(false); } else { return evenk(n - 1, k); }
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}
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