26 lines
726 B
Rust
26 lines
726 B
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
pure fn even(x: uint) -> bool {
|
|
if x < 2u {
|
|
return false;
|
|
} else if x == 2u { return true; } else { return even(x - 2u); }
|
|
}
|
|
|
|
fn foo(x: uint) {
|
|
if even(x) {
|
|
log(debug, x);
|
|
} else {
|
|
fail;
|
|
}
|
|
}
|
|
|
|
fn main() { foo(2u); }
|