// 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.

extern mod std;

pub fn main() {
  let nan = float::NaN;
  assert(float::is_NaN(nan));

  let inf = float::infinity;
  assert(-inf == float::neg_infinity);

  assert( nan !=  nan);
  assert( nan != -nan);
  assert(-nan != -nan);
  assert(-nan !=  nan);

  assert( nan !=   1.);
  assert( nan !=   0.);
  assert( nan !=  inf);
  assert( nan != -inf);

  assert(  1. !=  nan);
  assert(  0. !=  nan);
  assert( inf !=  nan);
  assert(-inf !=  nan);

  assert(!( nan ==  nan));
  assert(!( nan == -nan));
  assert(!( nan ==   1.));
  assert(!( nan ==   0.));
  assert(!( nan ==  inf));
  assert(!( nan == -inf));
  assert(!(  1. ==  nan));
  assert(!(  0. ==  nan));
  assert(!( inf ==  nan));
  assert(!(-inf ==  nan));
  assert(!(-nan ==  nan));
  assert(!(-nan == -nan));

  assert(!( nan >  nan));
  assert(!( nan > -nan));
  assert(!( nan >   0.));
  assert(!( nan >  inf));
  assert(!( nan > -inf));
  assert(!(  0. >  nan));
  assert(!( inf >  nan));
  assert(!(-inf >  nan));
  assert(!(-nan >  nan));

  assert(!(nan <   0.));
  assert(!(nan <   1.));
  assert(!(nan <  -1.));
  assert(!(nan <  inf));
  assert(!(nan < -inf));
  assert(!(nan <  nan));
  assert(!(nan < -nan));

  assert(!(  0. < nan));
  assert(!(  1. < nan));
  assert(!( -1. < nan));
  assert(!( inf < nan));
  assert(!(-inf < nan));
  assert(!(-nan < nan));

  assert(float::is_NaN(nan + inf));
  assert(float::is_NaN(nan + -inf));
  assert(float::is_NaN(nan + 0.));
  assert(float::is_NaN(nan + 1.));
  assert(float::is_NaN(nan * 1.));
  assert(float::is_NaN(nan / 1.));
  assert(float::is_NaN(nan / 0.));
  assert(float::is_NaN(0. / 0.));
  assert(float::is_NaN(-inf + inf));
  assert(float::is_NaN(inf - inf));

  assert(!float::is_NaN(-1.));
  assert(!float::is_NaN(0.));
  assert(!float::is_NaN(0.1));
  assert(!float::is_NaN(1.));
  assert(!float::is_NaN(inf));
  assert(!float::is_NaN(-inf));
  assert(!float::is_NaN(1./-inf));
}