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| author | Jonathan Wakely <jwakely@redhat.com> | 2018-01-15 19:58:22 +0000 |
|---|---|---|
| committer | Jonathan Wakely <redi@gcc.gnu.org> | 2018-01-15 19:58:22 +0000 |
| commit | 8b3085e7e87f2acb7c0e3689e357ffd368c20cde (patch) | |
| tree | 16990dfafd49aa55de94ff0b026c10e2de389f07 /libstdc++-v3 | |
| parent | 97a78e3396d4b901800f43f1075058f876a86058 (diff) | |
| download | gcc-8b3085e7e87f2acb7c0e3689e357ffd368c20cde.zip gcc-8b3085e7e87f2acb7c0e3689e357ffd368c20cde.tar.gz gcc-8b3085e7e87f2acb7c0e3689e357ffd368c20cde.tar.bz2 | |
PR libstdc++/83833 fix chi_squared_distribution::param(const param&)
PR libstdc++/83833
* include/bits/random.h (chi_squared_distribution::param): Update
gamma distribution parameter.
* testsuite/26_numerics/random/chi_squared_distribution/83833.cc: New
test.
From-SVN: r256708
Diffstat (limited to 'libstdc++-v3')
| -rw-r--r-- | libstdc++-v3/ChangeLog | 6 | ||||
| -rw-r--r-- | libstdc++-v3/include/bits/random.h | 7 | ||||
| -rw-r--r-- | libstdc++-v3/testsuite/26_numerics/random/chi_squared_distribution/83833.cc | 39 |
3 files changed, 51 insertions, 1 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 572fbc6..2f4df71 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,5 +1,11 @@ 2018-01-15 Jonathan Wakely <jwakely@redhat.com> + PR libstdc++/83833 + * include/bits/random.h (chi_squared_distribution::param): Update + gamma distribution parameter. + * testsuite/26_numerics/random/chi_squared_distribution/83833.cc: New + test. + PR libstdc++/83830 * include/std/type_traits (has_unique_object_representations_v): Add variable template. diff --git a/libstdc++-v3/include/bits/random.h b/libstdc++-v3/include/bits/random.h index 655ee1d..f812bbf 100644 --- a/libstdc++-v3/include/bits/random.h +++ b/libstdc++-v3/include/bits/random.h @@ -2643,7 +2643,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION */ void param(const param_type& __param) - { _M_param = __param; } + { + _M_param = __param; + typedef typename std::gamma_distribution<result_type>::param_type + param_type; + _M_gd.param(param_type{__param.n() / 2}); + } /** * @brief Returns the greatest lower bound value of the distribution. diff --git a/libstdc++-v3/testsuite/26_numerics/random/chi_squared_distribution/83833.cc b/libstdc++-v3/testsuite/26_numerics/random/chi_squared_distribution/83833.cc new file mode 100644 index 0000000..0166763 --- /dev/null +++ b/libstdc++-v3/testsuite/26_numerics/random/chi_squared_distribution/83833.cc @@ -0,0 +1,39 @@ +// Copyright (C) 2018 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// <http://www.gnu.org/licenses/>. + +// { dg-do run { target c++11 } } + +#include <random> +#include <testsuite_hooks.h> + +void +test01() +{ + std::default_random_engine r1, r2; + using chi = std::chi_squared_distribution<double>; + chi::param_type p(5); + chi d1(p); + chi d2; + d2.param(p); + VERIFY( d1(r1) == d2(r2) ); // PR libstdc++/83833 +} + +int +main() +{ + test01(); +} |