1 // { dg-options "-std=c++0x" }
3 // 2008-12-03 Edward M. Smith-Rowland <3dw4rd@verizon.net>
5 // Copyright (C) 2008 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 2, 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 COPYING. If not, write to the Free
20 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
23 // 26.4.8.5.3 Class template piecewise_linear_distribution [rand.dist.samp.plinear]
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)
44 return std::cos(2 * M_PI
* (x
- _M_x0
) / _M_lambda
);
55 bool test
__attribute__((unused
)) = true;
57 cosine_distribution
cd(1.5, 3.0);
58 std::piecewise_linear_distribution
<> u(21, -10.0, 10.0, cd
);
59 std::vector
<double> interval
= u
.intervals();
60 std::vector
<double> density
= u
.densities();
61 VERIFY( interval
.size() == 22 );
62 VERIFY( density
.size() == 22 );