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random.h (discrete_distribution<>::param_type:: param_type()): Default construct the vectors.

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2010-10-13  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/random.h (discrete_distribution<>::param_type::
	param_type()): Default construct the vectors.
	(discrete_distribution<>::param_type::probabilities): Adjust.
	(discrete_distribution<>::probabilities): Likewise.
	(discrete_distribution<>::max): Likewise.
	(piecewise_constant_distribution<>::param_type::
	param_type()): Default construct the vectors.
	(piecewise_constant_distribution<>::param_type::intervals): Adjust.
	(piecewise_constant_distribution<>::param_type::densities): Likewise.
	(piecewise_constant_distribution<>::intervals): Likewise.
	(piecewise_constant_distribution<>::densities): Likewise.
	(piecewise_constant_distribution<>::min): Likewise.
	(piecewise_constant_distribution<>::max): Likewise.
	(piecewise_linear_distribution<>::param_type::
	param_type()): Default construct the vectors.
	(piecewise_linear_distribution<>::param_type::intervals): Adjust.
	(piecewise_linear_distribution<>::param_type::densities): Likewise.
	(piecewise_linear_distribution<>::intervals): Likewise.
	(piecewise_linear_distribution<>::densities): Likewise.
	(piecewise_linear_distribution<>::min): Likewise.
	(piecewise_linear_distribution<>::max): Likewise.
	* include/bits/random.tcc (discrete_distribution<>::param_type::
	_M_initialize): Deal quickly with raw _M_prob equivalent to
	a default constructed param_type, just clear the vector.
	(discrete_distribution<>::operator()): Early return 0 for a
	default constructed distribution.
	(piecewise_constant_distribution<>::param_type::_M_initialize):
	Likewise for _M_int and _M_den.
	(piecewise_constant_distribution<>::operator()): Early return
	for a default constructed distribution.
	(piecewise_linear_distribution<>::param_type::_M_initialize):
	Likewise.
	(piecewise_linear_distribution<>::operator()): Early return
	for a default constructed distribution.
	* testsuite/26_numerics/random/discrete_distribution/operators/
	call-default.cc: New.
	* testsuite/26_numerics/random/piecewise_constant_distribution/
	operators/call-default.cc: Likewise.

From-SVN: r165427
This commit is contained in:
Paolo Carlini 2010-10-13 16:31:17 +00:00 • committed by Paolo Carlini
parent 18aebb0e6f
commit 879b9073c8
5 changed files with 219 additions and 38 deletions
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41
libstdc++-v3/ChangeLog
View file

@ -1,3 +1,44 @@
2010-10-13 Paolo Carlini <paolo.carlini@oracle.com>
* include/bits/random.h (discrete_distribution<>::param_type::
param_type()): Default construct the vectors.
(discrete_distribution<>::param_type::probabilities): Adjust.
(discrete_distribution<>::probabilities): Likewise.
(discrete_distribution<>::max): Likewise.
(piecewise_constant_distribution<>::param_type::
param_type()): Default construct the vectors.
(piecewise_constant_distribution<>::param_type::intervals): Adjust.
(piecewise_constant_distribution<>::param_type::densities): Likewise.
(piecewise_constant_distribution<>::intervals): Likewise.
(piecewise_constant_distribution<>::densities): Likewise.
(piecewise_constant_distribution<>::min): Likewise.
(piecewise_constant_distribution<>::max): Likewise.
(piecewise_linear_distribution<>::param_type::
param_type()): Default construct the vectors.
(piecewise_linear_distribution<>::param_type::intervals): Adjust.
(piecewise_linear_distribution<>::param_type::densities): Likewise.
(piecewise_linear_distribution<>::intervals): Likewise.
(piecewise_linear_distribution<>::densities): Likewise.
(piecewise_linear_distribution<>::min): Likewise.
(piecewise_linear_distribution<>::max): Likewise.
* include/bits/random.tcc (discrete_distribution<>::param_type::
_M_initialize): Deal quickly with raw _M_prob equivalent to
a default constructed param_type, just clear the vector.
(discrete_distribution<>::operator()): Early return 0 for a
default constructed distribution.
(piecewise_constant_distribution<>::param_type::_M_initialize):
Likewise for _M_int and _M_den.
(piecewise_constant_distribution<>::operator()): Early return
for a default constructed distribution.
(piecewise_linear_distribution<>::param_type::_M_initialize):
Likewise.
(piecewise_linear_distribution<>::operator()): Early return
for a default constructed distribution.
* testsuite/26_numerics/random/discrete_distribution/operators/
call-default.cc: New.
* testsuite/26_numerics/random/piecewise_constant_distribution/
operators/call-default.cc: Likewise.
2010-10-12 Paolo Carlini <paolo.carlini@oracle.com>
* include/bits/random.h (discrete_distribution<>::param_type):

100
libstdc++-v3/include/bits/random.h
View file

@ -4697,7 +4697,7 @@ namespace std
friend class discrete_distribution<_IntType>;
param_type()
: _M_prob(1, 1.0), _M_cp()
: _M_prob(), _M_cp()
{ }
template<typename _InputIterator>
@ -4720,7 +4720,7 @@ namespace std
std::vector<double>
probabilities() const
{ return _M_prob; }
{ return _M_prob.empty() ? std::vector<double>(1, 1.0) : _M_prob; }
friend bool
operator==(const param_type& __p1, const param_type& __p2)
@ -4771,7 +4771,10 @@ namespace std
*/
std::vector<double>
probabilities() const
{ return _M_param.probabilities(); }
{
return _M_param._M_prob.empty()
? std::vector<double>(1, 1.0) : _M_param._M_prob;
}
/**
* @brief Returns the parameter set of the distribution.
@ -4800,7 +4803,10 @@ namespace std
*/
result_type
max() const
{ return this->_M_param._M_prob.size() - 1; }
{
return _M_param._M_prob.empty()
? result_type(0) : result_type(_M_param._M_prob.size() - 1);
}
/**
* @brief Generating functions.
@ -4893,8 +4899,8 @@ namespace std
friend class piecewise_constant_distribution<_RealType>;
param_type()
: _M_int(2), _M_den(1, 1.0), _M_cp()
{ _M_int[1] = _RealType(1); }
: _M_int(), _M_den(), _M_cp()
{ }
template<typename _InputIteratorB, typename _InputIteratorW>
param_type(_InputIteratorB __bfirst,
@ -4914,11 +4920,20 @@ namespace std
std::vector<_RealType>
intervals() const
{ return _M_int; }
{
if (_M_int.empty())
{
std::vector<_RealType> __tmp(2);
__tmp[1] = _RealType(1);
return __tmp;
}
else
return _M_int;
}
std::vector<double>
densities() const
{ return _M_den; }
{ return _M_den.empty() ? std::vector<double>(1, 1.0) : _M_den; }
friend bool
operator==(const param_type& __p1, const param_type& __p2)
@ -4975,14 +4990,26 @@ namespace std
*/
std::vector<_RealType>
intervals() const
{ return _M_param.intervals(); }
{
if (_M_param._M_int.empty())
{
std::vector<_RealType> __tmp(2);
__tmp[1] = _RealType(1);
return __tmp;
}
else
return _M_param._M_int;
}
/**
* @brief Returns a vector of the probability densities.
*/
std::vector<double>
densities() const
{ return _M_param.densities(); }
{
return _M_param._M_den.empty()
? std::vector<double>(1, 1.0) : _M_param._M_den;
}
/**
* @brief Returns the parameter set of the distribution.
@ -5004,14 +5031,20 @@ namespace std
*/
result_type
min() const
{ return this->_M_param._M_int.front(); }
{
return _M_param._M_int.empty()
? result_type(0) : _M_param._M_int.front();
}
/**
* @brief Returns the least upper bound value of the distribution.
*/
result_type
max() const
{ return this->_M_param._M_int.back(); }
{
return _M_param._M_int.empty()
? result_type(1) : _M_param._M_int.back();
}
/**
* @brief Generating functions.
@ -5105,8 +5138,8 @@ namespace std
friend class piecewise_linear_distribution<_RealType>;
param_type()
: _M_int(2), _M_den(2, 1.0), _M_cp(), _M_m()
{ _M_int[1] = _RealType(1); }
: _M_int(), _M_den(), _M_cp(), _M_m()
{ }
template<typename _InputIteratorB, typename _InputIteratorW>
param_type(_InputIteratorB __bfirst,
@ -5126,11 +5159,20 @@ namespace std
std::vector<_RealType>
intervals() const
{ return _M_int; }
{
if (_M_int.empty())
{
std::vector<_RealType> __tmp(2);
__tmp[1] = _RealType(1);
return __tmp;
}
else
return _M_int;
}
std::vector<double>
densities() const
{ return _M_den; }
{ return _M_den.empty() ? std::vector<double>(2, 1.0) : _M_den; }
friend bool
operator==(const param_type& __p1, const param_type& __p2)
@ -5189,7 +5231,16 @@ namespace std
*/
std::vector<_RealType>
intervals() const
{ return _M_param.intervals(); }
{
if (_M_param._M_int.empty())
{
std::vector<_RealType> __tmp(2);
__tmp[1] = _RealType(1);
return __tmp;
}
else
return _M_param._M_int;
}
/**
* @brief Return a vector of the probability densities of the
@ -5197,7 +5248,10 @@ namespace std
*/
std::vector<double>
densities() const
{ return _M_param.densities(); }
{
return _M_param._M_den.empty()
? std::vector<double>(2, 1.0) : _M_param._M_den;
}
/**
* @brief Returns the parameter set of the distribution.
@ -5219,14 +5273,20 @@ namespace std
*/
result_type
min() const
{ return this->_M_param._M_int.front(); }
{
return _M_param._M_int.empty()
? result_type(0) : _M_param._M_int.front();
}
/**
* @brief Returns the least upper bound value of the distribution.
*/
result_type
max() const
{ return this->_M_param._M_int.back(); }
{
return _M_param._M_int.empty()
? result_type(1) : _M_param._M_int.back();
}
/**
* @brief Generating functions.

34
libstdc++-v3/include/bits/random.tcc
View file

@ -2217,7 +2217,6 @@ namespace std
if (_M_prob.size() < 2)
{
_M_prob.clear();
_M_prob.push_back(1.0);
return;
}
@ -2257,6 +2256,9 @@ namespace std
operator()(_UniformRandomNumberGenerator& __urng,
const param_type& __param)
{
if (__param._M_cp.empty())
return result_type(0);
__detail::_Adaptor<_UniformRandomNumberGenerator, double>
__aurng(__urng);
@ -2330,16 +2332,13 @@ namespace std
piecewise_constant_distribution<_RealType>::param_type::
_M_initialize()
{
if (_M_int.size() < 2)
if (_M_int.size() < 2
|| (_M_int.size() == 2
&& _M_int[0] == _RealType(0)
&& _M_int[1] == _RealType(1)))
{
_M_int.clear();
_M_int.reserve(2);
_M_int.push_back(_RealType(0));
_M_int.push_back(_RealType(1));
_M_den.clear();
_M_den.push_back(1.0);
return;
}
@ -2433,6 +2432,9 @@ namespace std
__aurng(__urng);
const double __p = __aurng();
if (__param._M_cp.empty())
return __p;
auto __pos = std::lower_bound(__param._M_cp.begin(),
__param._M_cp.end(), __p);
const size_t __i = __pos - __param._M_cp.begin();
@ -2519,18 +2521,14 @@ namespace std
piecewise_linear_distribution<_RealType>::param_type::
_M_initialize()
{
if (_M_int.size() < 2)
if (_M_int.size() < 2
|| (_M_int.size() == 2
&& _M_int[0] == _RealType(0)
&& _M_int[1] == _RealType(1)
&& _M_den[0] == _M_den[1]))
{
_M_int.clear();
_M_int.reserve(2);
_M_int.push_back(_RealType(0));
_M_int.push_back(_RealType(1));
_M_den.clear();
_M_den.reserve(2);
_M_den.push_back(1.0);
_M_den.push_back(1.0);
return;
}
@ -2623,7 +2621,7 @@ namespace std
__aurng(__urng);
const double __p = __aurng();
if (__param._M_m.empty())
if (__param._M_cp.empty())
return __p;
auto __pos = std::lower_bound(__param._M_cp.begin(),

41
libstdc++-v3/testsuite/26_numerics/random/discrete_distribution/operators/call-default.cc Normal file
View file

@ -0,0 +1,41 @@
// { dg-options "-std=c++0x" }
// { dg-require-cstdint "" }
//
// 2010-10-13 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2010 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/>.
// 26.5.8.5.1 Class template discrete_distribution
// [rand.dist.samp.discrete]
#include <random>
void
test01()
{
std::discrete_distribution<> u;
std::minstd_rand0 rng;
u(rng);
}
int main()
{
test01();
return 0;
}

41
libstdc++-v3/testsuite/26_numerics/random/piecewise_constant_distribution/operators/call-default.cc Normal file
View file

@ -0,0 +1,41 @@
// { dg-options "-std=c++0x" }
// { dg-require-cstdint "" }
//
// 2010-10-13 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2010 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/>.
// 26.5.8.5.2 Class template piecewise_constant_distribution
// [rand.dist.samp.pconst]
#include <random>
void
test01()
{
std::piecewise_constant_distribution<> u;
std::minstd_rand0 rng;
u(rng);
}
int main()
{
test01();
return 0;
}