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PR libstdc++/37986 (cont)

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2008-11-12  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/37986 (cont)
	* include/tr1_impl/random (struct _Adaptor): Use only remove_reference
	on _Engine.
	(struct _Adaptor<_Engine*, _Distribution>): Add.
	* testsuite/tr1/5_numerical_facilities/random/variate_generator/
	37986.cc: Extend.

From-SVN: r141784
This commit is contained in:
Paolo Carlini 2008-11-12 09:59:27 +00:00 committed by Paolo Carlini
parent 66e6819110
commit 085b55410d
3 changed files with 79 additions and 5 deletions
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9
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,12 @@
2008-11-12 Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/37986 (cont)
* include/tr1_impl/random (struct _Adaptor): Use only remove_reference
on _Engine.
(struct _Adaptor<_Engine*, _Distribution>): Add.
* testsuite/tr1/5_numerical_facilities/random/variate_generator/
37986.cc: Extend.
2008-11-11 Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/37986

71
libstdc++-v3/include/tr1_impl/random
View File

@ -79,11 +79,9 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
template<typename _Engine, typename _Distribution>
struct _Adaptor
{
typedef typename remove_reference<
typename remove_pointer<_Engine>::type>::type _BEngine;
typedef typename _BEngine::result_type _Engine_result_type;
typedef typename _Distribution::input_type result_type;
typedef typename remove_reference<_Engine>::type _BEngine;
typedef typename _BEngine::result_type _Engine_result_type;
typedef typename _Distribution::input_type result_type;
public:
_Adaptor(const _Engine& __g)
@ -149,6 +147,69 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
private:
_Engine _M_g;
};
// Specialization for _Engine*.
template<typename _Engine, typename _Distribution>
struct _Adaptor<_Engine*, _Distribution>
{
typedef typename _Engine::result_type _Engine_result_type;
typedef typename _Distribution::input_type result_type;
public:
_Adaptor(_Engine* __g)
: _M_g(__g) { }
result_type
min() const
{
result_type __return_value;
if (is_integral<_Engine_result_type>::value
&& is_integral<result_type>::value)
__return_value = _M_g->min();
else
__return_value = result_type(0);
return __return_value;
}
result_type
max() const
{
result_type __return_value;
if (is_integral<_Engine_result_type>::value
&& is_integral<result_type>::value)
__return_value = _M_g->max();
else if (!is_integral<result_type>::value)
__return_value = result_type(1);
else
__return_value = std::numeric_limits<result_type>::max() - 1;
return __return_value;
}
result_type
operator()()
{
result_type __return_value;
if (is_integral<_Engine_result_type>::value
&& is_integral<result_type>::value)
__return_value = (*_M_g)();
else if (!is_integral<_Engine_result_type>::value
&& !is_integral<result_type>::value)
__return_value = result_type((*_M_g)() - _M_g->min())
/ result_type(_M_g->max() - _M_g->min());
else if (is_integral<_Engine_result_type>::value
&& !is_integral<result_type>::value)
__return_value = result_type((*_M_g)() - _M_g->min())
/ result_type(_M_g->max() - _M_g->min() + result_type(1));
else
__return_value = ((((*_M_g)() - _M_g->min())
/ (_M_g->max() - _M_g->min()))
* std::numeric_limits<result_type>::max());
return __return_value;
}
private:
_Engine* _M_g;
};
} // namespace __detail
/**

4
libstdc++-v3/testsuite/tr1/5_numerical_facilities/random/variate_generator/37986.cc
View File

@ -42,4 +42,8 @@ void test01()
std::tr1::mt19937*,
std::tr1::uniform_real<double>
> g3(&mt, dist);
g1();
g2();
g3();
}