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PATH: usr / include / c++ / 11 / experimental

// <experimental/random> -*- C++ -*-

// Copyright (C) 2015-2021 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file experimental/random
 *  This is a TS C++ Library header.
 *  @ingroup libfund-ts
 */

#ifndef _GLIBCXX_EXPERIMENTAL_RANDOM
#define _GLIBCXX_EXPERIMENTAL_RANDOM 1

#if __cplusplus >= 201402L
#include <random>
#include <experimental/bits/lfts_config.h>

namespace std {
_GLIBCXX_BEGIN_NAMESPACE_VERSION

namespace experimental {
inline namespace fundamentals_v2 {
#define __cpp_lib_experimental_randint 201511

inline std::default_random_engine&
  _S_randint_engine()
  {
    static thread_local default_random_engine __eng{random_device{}()};
    return __eng;
  }

// 13.2.2.1, Function template randint
  template<typename _IntType>
    inline _IntType
    randint(_IntType __a, _IntType __b)
    {
      static_assert(is_integral<_IntType>::value && sizeof(_IntType) > 1,
		    "argument must be an integer type");
      using _Dist = std::uniform_int_distribution<_IntType>;
      // This relies on the fact our uniform_int_distribution is stateless,
      // otherwise we'd need a static thread_local _Dist and pass it
      // _Dist::param_type{__a, __b}.
      return _Dist(__a, __b)(_S_randint_engine());
    }

inline void
  reseed()
  {
    _S_randint_engine().seed(random_device{}());
  }

inline void
  reseed(default_random_engine::result_type __value)
  {
    _S_randint_engine().seed(__value);
  }
} // namespace fundamentals_v2
} // namespace experimental

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++14
#endif // _GLIBCXX_EXPERIMENTAL_RANDOM

[-] numeric [edit]
[-] random [edit]
[-] deque [edit]
[-] netfwd [edit]
[-] io_context [edit]
[-] string_view [edit]
[-] type_traits [edit]
[-] functional [edit]
[+] bits
[-] net [edit]
[-] memory [edit]
[-] list [edit]
[-] map [edit]
[-] filesystem [edit]
[-] ratio [edit]
[-] memory_resource [edit]
[-] timer [edit]
[-] buffer [edit]
[-] optional [edit]
[-] executor [edit]
[-] set [edit]
[-] unordered_set [edit]
[+] ..
[-] string [edit]
[-] tuple [edit]
[-] chrono [edit]
[-] algorithm [edit]
[-] vector [edit]
[-] utility [edit]
[-] internet [edit]
[-] unordered_map [edit]
[-] forward_list [edit]
[-] array [edit]
[-] iterator [edit]
[-] source_location [edit]
[-] socket [edit]
[-] simd [edit]
[-] regex [edit]
[-] system_error [edit]
[-] propagate_const [edit]
[-] any [edit]