src/etc/test-float-parse/rand-f64.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![feature(rand)]
  12
  13 extern crate rand;
  14
  15 mod _common;
  16
  17 use _common::{validate, SEED};
  18 use rand::{IsaacRng, Rng, SeedableRng};
  19 use std::mem::transmute;
  20
  21 fn main() {
  22     let mut rnd = IsaacRng::from_seed(&SEED);
  23     let mut i = 0;
  24     while i < 10_000_000 {
  25         let bits = rnd.next_u64();
  26         let x: f64 = unsafe { transmute(bits) };
  27         if x.is_finite() {
  28             validate(&format!("{:e}", x));
  29             i += 1;
  30         }
  31     }
  32 }