]>
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" }
2 // { dg-require-cstdint "" }
4 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
6 // Copyright (C) 2008-2013 Free Software Foundation, Inc.
8 // This file is part of the GNU ISO C++ Library. This library is free
9 // software; you can redistribute it and/or modify it under the
10 // terms of the GNU General Public License as published by the
11 // Free Software Foundation; either version 3, or (at your option)
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License along
20 // with this library; see the file COPYING3. If not see
21 // <http://www.gnu.org/licenses/>.
23 // 26.4.8.5.1 Class template discrete_distribution [rand.dist.samp.discrete]
24 // 26.4.2.4 Concept RandomNumberDistribution [rand.concept.dist]
28 #include <testsuite_hooks.h>
30 struct cosine_distribution
32 cosine_distribution(double x0
, double lambda
)
33 : _M_x0(x0
), _M_lambda(lambda
)
39 if (x
- _M_x0
< -_M_lambda
/ 4)
41 else if (x
- _M_x0
> _M_lambda
/ 4)
45 const double pi
= 3.14159265358979323846;
46 return std::cos(2 * pi
* (x
- _M_x0
) / _M_lambda
);
58 bool test
__attribute__((unused
)) = true;
60 cosine_distribution
cd(1.5, 3.0);
61 std::discrete_distribution
<> u(21, -10.0, 10.0, cd
);
62 std::vector
<double> probablility
= u
.probabilities();
63 VERIFY( probablility
.size() == 21 );