]>
git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/26_numerics/random/discrete_distribution/cons/num_xbound_fun.cc
1 // { dg-options "-std=c++0x" }
3 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
5 // Copyright (C) 2008, 2009 Free Software Foundation, Inc.
7 // This file is part of the GNU ISO C++ Library. This library is free
8 // software; you can redistribute it and/or modify it under the
9 // terms of the GNU General Public License as published by the
10 // Free Software Foundation; either version 3, or (at your option)
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License along
19 // with this library; see the file COPYING3. If not see
20 // <http://www.gnu.org/licenses/>.
22 // 26.4.8.5.1 Class template discrete_distribution [rand.dist.samp.discrete]
23 // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
27 #include <testsuite_hooks.h>
29 struct cosine_distribution
31 cosine_distribution(double x0
, double lambda
)
32 : _M_x0(x0
), _M_lambda(lambda
)
38 if (x
- _M_x0
< -_M_lambda
/ 4)
40 else if (x
- _M_x0
> _M_lambda
/ 4)
43 return std::cos(2 * M_PI
* (x
- _M_x0
) / _M_lambda
);
54 bool test
__attribute__((unused
)) = true;
56 cosine_distribution
cd(1.5, 3.0);
57 std::discrete_distribution
<> u(21, -10.0, 10.0, cd
);
58 std::vector
<double> probablility
= u
.probabilities();
59 VERIFY( probablility
.size() == 21 );