55 lines
1.1 KiB
Rust
55 lines
1.1 KiB
Rust
// Copyright 2012-2014 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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// aux-build:cond_plugin.rs
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// ignore-stage1
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#![feature(plugin)]
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#![feature(rustc_private)]
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#![plugin(cond_plugin)]
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fn fact(n : i64) -> i64 {
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if n == 0 {
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1
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} else {
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n * fact(n - 1)
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}
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}
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fn fact_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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(else (n * fact_cond(n-1)))
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)
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}
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fn fib(n : i64) -> i64 {
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if n == 0 || n == 1 {
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1
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} else {
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fib(n-1) + fib(n-2)
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}
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}
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fn fib_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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((n == 1) 1)
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(else (fib_cond(n-1) + fib_cond(n-2)))
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)
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}
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fn main() {
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assert_eq!(fact(3), fact_cond(3));
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assert_eq!(fact(5), fact_cond(5));
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assert_eq!(fib(5), fib_cond(5));
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assert_eq!(fib(8), fib_cond(8));
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}
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