mirror of https://github.com/rust-lang/rust
47 lines
704 B
Rust
47 lines
704 B
Rust
//@ run-pass
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//@ aux-build:cond_plugin.rs
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#![allow(unused_parens)]
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extern crate cond_plugin;
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use cond_plugin::cond;
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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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