random: Add __gnu_cxx::beta_distribution<> class.
* libstdc++-v3/include/ext/random: Add __gnu_cxx::beta_distribution<> class. * libstdc++-v3/include/ext/random.tcc: Add out-of-line functions for __gnu_cxx::beta_distribution<>. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ operators/equal.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ operators/serialize.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ operators/inequal.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ cons/parms.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ cons/default.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ requirements/typedefs.cc: New file. * libstdc++-v3/testsuite/26_numerics/random/beta_distribution/ requirements/explicit_instantiation/1.cc: New file. From-SVN: r190954
This commit is contained in:
parent
abd16fb112
commit
d4d348a9fe
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@ -1,3 +1,24 @@
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2012-09-04 Ulrich Drepper <drepper@gmail.com>
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* libstdc++-v3/include/ext/random: Add __gnu_cxx::beta_distribution<>
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class.
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* libstdc++-v3/include/ext/random.tcc: Add out-of-line functions for
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__gnu_cxx::beta_distribution<>.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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operators/equal.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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operators/serialize.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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operators/inequal.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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cons/parms.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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cons/default.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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requirements/typedefs.cc: New file.
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* libstdc++-v3/testsuite/26_numerics/random/beta_distribution/
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requirements/explicit_instantiation/1.cc: New file.
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2012-09-04 Steven Bosscher <steven@gcc.gnu.org>
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PR bootstrap/54453
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@ -374,6 +374,223 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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0x3bd2b64bU, 0x0c64b1e4U>
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sfmt216091_64;
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/**
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* @brief A beta continuous distribution for random numbers.
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*
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* The formula for the beta probability density function is:
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* @f[
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* p(x|\alpha,\beta) = \frac{1}{B(\alpha,\beta)}
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* x^{\alpha - 1} (1 - x)^{\beta - 1}
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* @f]
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*/
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template<typename _RealType = double>
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class beta_distribution
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{
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static_assert(std::is_floating_point<_RealType>::value,
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"template argument not a floating point type");
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public:
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/** The type of the range of the distribution. */
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typedef _RealType result_type;
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/** Parameter type. */
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struct param_type
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{
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typedef beta_distribution<_RealType> distribution_type;
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friend class beta_distribution<_RealType>;
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explicit
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param_type(_RealType __alpha_val = _RealType(1),
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_RealType __beta_val = _RealType(1))
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: _M_alpha(__alpha_val), _M_beta(__beta_val)
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{
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_GLIBCXX_DEBUG_ASSERT(_M_alpha > _RealType(0));
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_GLIBCXX_DEBUG_ASSERT(_M_beta > _RealType(0));
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}
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_RealType
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alpha() const
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{ return _M_alpha; }
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_RealType
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beta() const
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{ return _M_beta; }
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friend bool
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operator==(const param_type& __p1, const param_type& __p2)
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{ return (__p1._M_alpha == __p2._M_alpha
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&& __p1._M_beta == __p2._M_beta); }
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private:
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void
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_M_initialize();
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_RealType _M_alpha;
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_RealType _M_beta;
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};
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public:
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/**
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* @brief Constructs a beta distribution with parameters
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* @f$\alpha@f$ and @f$\beta@f$.
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*/
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explicit
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beta_distribution(_RealType __alpha_val = _RealType(1),
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_RealType __beta_val = _RealType(1))
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: _M_param(__alpha_val, __beta_val)
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{ }
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explicit
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beta_distribution(const param_type& __p)
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: _M_param(__p)
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{ }
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/**
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* @brief Resets the distribution state.
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*/
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void
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reset()
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{ }
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/**
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* @brief Returns the @f$\alpha@f$ of the distribution.
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*/
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_RealType
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alpha() const
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{ return _M_param.alpha(); }
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/**
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* @brief Returns the @f$\beta@f$ of the distribution.
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*/
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_RealType
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beta() const
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{ return _M_param.beta(); }
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/**
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* @brief Returns the parameter set of the distribution.
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*/
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param_type
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param() const
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{ return _M_param; }
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/**
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* @brief Sets the parameter set of the distribution.
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* @param __param The new parameter set of the distribution.
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*/
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void
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param(const param_type& __param)
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{ _M_param = __param; }
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/**
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* @brief Returns the greatest lower bound value of the distribution.
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*/
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result_type
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min() const
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{ return result_type(0); }
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/**
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* @brief Returns the least upper bound value of the distribution.
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*/
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result_type
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max() const
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{ return result_type(1); }
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/**
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* @brief Generating functions.
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*/
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template<typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformRandomNumberGenerator& __urng)
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{ return this->operator()(__urng, this->param()); }
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template<typename _UniformRandomNumberGenerator>
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result_type
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operator()(_UniformRandomNumberGenerator& __urng,
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const param_type& __p);
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng)
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{ this->__generate(__f, __t, __urng, this->param()); }
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p)
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{ this->__generate_impl(__f, __t, __urng, __p); }
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template<typename _UniformRandomNumberGenerator>
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void
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__generate(result_type* __f, result_type* __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p)
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{ this->__generate_impl(__f, __t, __urng, __p); }
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/**
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* @brief Return true if two beta distributions have the same
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* parameters and the sequences that would be generated
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* are equal.
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*/
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friend bool
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operator==(const beta_distribution& __d1,
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const beta_distribution& __d2)
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{ return __d1.param() == __d2.param(); }
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/**
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* @brief Inserts a %beta_distribution random number distribution
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* @p __x into the output stream @p __os.
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*
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* @param __os An output stream.
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* @param __x A %beta_distribution random number distribution.
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*
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* @returns The output stream with the state of @p __x inserted or in
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* an error state.
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*/
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template<typename _RealType1, typename _CharT, typename _Traits>
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friend std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const __gnu_cxx::beta_distribution<_RealType1>& __x);
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/**
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* @brief Extracts a %beta_distribution random number distribution
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* @p __x from the input stream @p __is.
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*
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* @param __is An input stream.
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* @param __x A %beta_distribution random number generator engine.
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*
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* @returns The input stream with @p __x extracted or in an error state.
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*/
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template<typename _RealType1, typename _CharT, typename _Traits>
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friend std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>& __is,
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__gnu_cxx::beta_distribution<_RealType1>& __x);
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private:
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template<typename _ForwardIterator,
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typename _UniformRandomNumberGenerator>
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void
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__generate_impl(_ForwardIterator __f, _ForwardIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __p);
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param_type _M_param;
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};
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/**
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* @brief Return true if two beta distributions are different.
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*/
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template<typename _RealType>
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inline bool
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operator!=(const __gnu_cxx::beta_distribution<_RealType>& __d1,
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const __gnu_cxx::beta_distribution<_RealType>& __d2)
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{ return !(__d1 == __d2); }
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace std
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@ -438,6 +438,106 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
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return __is;
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}
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/**
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* Iteration method due to M.D. J<o:>hnk.
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*
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* M.D. J<o:>hnk, Erzeugung von betaverteilten und gammaverteilten
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* Zufallszahlen, Metrika, Volume 8, 1964
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*/
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template<typename _RealType>
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template<typename _UniformRandomNumberGenerator>
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typename beta_distribution<_RealType>::result_type
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beta_distribution<_RealType>::
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operator()(_UniformRandomNumberGenerator& __urng,
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const param_type& __param)
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{
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std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
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__aurng(__urng);
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result_type __x, __y;
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do
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{
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__x = std::exp(std::log(__aurng()) / __param.alpha());
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__y = std::exp(std::log(__aurng()) / __param.beta());
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}
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while (__x + __y > result_type(1));
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return __x / (__x + __y);
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}
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template<typename _RealType>
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template<typename _OutputIterator,
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typename _UniformRandomNumberGenerator>
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void
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beta_distribution<_RealType>::
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__generate_impl(_OutputIterator __f, _OutputIterator __t,
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_UniformRandomNumberGenerator& __urng,
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const param_type& __param)
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{
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__glibcxx_function_requires(_OutputIteratorConcept<_OutputIterator>)
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std::__detail::_Adaptor<_UniformRandomNumberGenerator, result_type>
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__aurng(__urng);
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while (__f != __t)
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{
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result_type __x, __y;
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do
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{
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__x = std::exp(std::log(__aurng()) / __param.alpha());
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__y = std::exp(std::log(__aurng()) / __param.beta());
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}
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while (__x + __y > result_type(1));
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*__f++ = __x / (__x + __y);
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}
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}
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template<typename _RealType, typename _CharT, typename _Traits>
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std::basic_ostream<_CharT, _Traits>&
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operator<<(std::basic_ostream<_CharT, _Traits>& __os,
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const __gnu_cxx::beta_distribution<_RealType>& __x)
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{
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typedef std::basic_ostream<_CharT, _Traits> __ostream_type;
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typedef typename __ostream_type::ios_base __ios_base;
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const typename __ios_base::fmtflags __flags = __os.flags();
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const _CharT __fill = __os.fill();
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const std::streamsize __precision = __os.precision();
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const _CharT __space = __os.widen(' ');
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__os.flags(__ios_base::scientific | __ios_base::left);
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__os.fill(__space);
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__os.precision(std::numeric_limits<_RealType>::max_digits10);
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__os << __x.alpha() << __space << __x.beta();
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__os.flags(__flags);
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__os.fill(__fill);
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__os.precision(__precision);
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return __os;
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}
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template<typename _RealType, typename _CharT, typename _Traits>
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std::basic_istream<_CharT, _Traits>&
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operator>>(std::basic_istream<_CharT, _Traits>& __is,
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__gnu_cxx::beta_distribution<_RealType>& __x)
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{
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typedef std::basic_istream<_CharT, _Traits> __istream_type;
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typedef typename __istream_type::ios_base __ios_base;
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const typename __ios_base::fmtflags __flags = __is.flags();
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__is.flags(__ios_base::dec | __ios_base::skipws);
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_RealType __alpha_val, __beta_val;
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__is >> __alpha_val >> __beta_val;
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__x.param(typename __gnu_cxx::beta_distribution<_RealType>::
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param_type(__alpha_val, __beta_val));
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__is.flags(__flags);
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return __is;
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}
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace
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|
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@ -0,0 +1,43 @@
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// { dg-options "-std=c++0x" }
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// { dg-require-cstdint "" }
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//
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// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
|
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// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
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//
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||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test __attribute__((unused)) = true;
|
||||
|
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__gnu_cxx::beta_distribution<> u;
|
||||
VERIFY( u.alpha() == 1.0 );
|
||||
VERIFY( u.beta() == 1.0 );
|
||||
VERIFY( u.min() == 0.0 );
|
||||
VERIFY( u.max() == 1.0 );
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,43 @@
|
|||
// { dg-options "-std=c++0x" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
|
||||
// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test __attribute__((unused)) = true;
|
||||
|
||||
__gnu_cxx::beta_distribution<> u(1.5, 3.0);
|
||||
VERIFY( u.alpha() == 1.5 );
|
||||
VERIFY( u.beta() == 3.0 );
|
||||
VERIFY( u.min() == 0.0 );
|
||||
VERIFY( u.max() == 1.0 );
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,42 @@
|
|||
// { dg-options "-std=c++0x" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// 2010-03-16 Paolo Carlini <paolo.carlini@oracle.com>
|
||||
// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test __attribute__((unused)) = true;
|
||||
|
||||
__gnu_cxx::beta_distribution<double> u(1.5, 3.0), v, w;
|
||||
|
||||
VERIFY( v == w );
|
||||
VERIFY( !(u == v) );
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,42 @@
|
|||
// { dg-options "-std=c++0x" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// 2010-03-16 Paolo Carlini <paolo.carlini@oracle.com>
|
||||
// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
bool test __attribute__((unused)) = true;
|
||||
|
||||
__gnu_cxx::beta_distribution<double> u(1.5, 3.0), v, w;
|
||||
|
||||
VERIFY( u != v );
|
||||
VERIFY( !(v != w) );
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,44 @@
|
|||
// { dg-options "-std=c++0x" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// 2009-08-14 Edward M. Smith-Rowland <3dw4rd@verizon.net>
|
||||
// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
#include <sstream>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
std::stringstream str;
|
||||
__gnu_cxx::beta_distribution<double> u(1.5, 3.0), v;
|
||||
std::minstd_rand0 rng;
|
||||
|
||||
u(rng); // advance
|
||||
str << u;
|
||||
|
||||
str >> v;
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,26 @@
|
|||
// { dg-do compile }
|
||||
// { dg-options "-std=c++11" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
|
||||
template class __gnu_cxx::beta_distribution<float>;
|
||||
template class __gnu_cxx::beta_distribution<double>;
|
||||
template class __gnu_cxx::beta_distribution<long double>;
|
|
@ -0,0 +1,34 @@
|
|||
// { dg-do compile }
|
||||
// { dg-options "-std=c++0x" }
|
||||
// { dg-require-cstdint "" }
|
||||
//
|
||||
// 2008-11-24 Edward M. Smith-Rowland <3dw4rd@verizon.net>
|
||||
// 2012-09-04 Ulrich Drepper <drepper@gmail.com>
|
||||
//
|
||||
// Copyright (C) 2012 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/>.
|
||||
|
||||
#include <ext/random>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
typedef __gnu_cxx::beta_distribution<double> test_type;
|
||||
|
||||
typedef test_type::result_type result_type;
|
||||
typedef test_type::param_type param_type;
|
||||
}
|
Loading…
Reference in New Issue