libcxx/include/initializer_list

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_INITIALIZER_LIST
#define _LIBCPP_INITIALIZER_LIST

/*
    initializer_list synopsis

namespace std
{

template<class E>
class initializer_list
{
public:
    typedef E        value_type;
    typedef const E& reference;
    typedef const E& const_reference;
    typedef size_t   size_type;

    typedef const E* iterator;
    typedef const E* const_iterator;

    initializer_list() noexcept; // constexpr in C++14

    const E* data()  const noexcept; // constexpr in C++14
    size_t   size()  const noexcept; // constexpr in C++14
    bool     empty() const noexcept; // constexpr in C++14
    const E* begin() const noexcept; // constexpr in C++14
    const E* end()   const noexcept; // constexpr in C++14
};

}  // std

*/

#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
#  include <__cxx03/__config>
#else
#  include <__config>
#  include <__cstddef/size_t.h>
#  include <version>

#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#    pragma GCC system_header
#  endif

#  ifndef _LIBCPP_CXX03_LANG

namespace std // purposefully not versioned
{

template <class _Ep>
class _LIBCPP_NO_SPECIALIZATIONS initializer_list {
  const _Ep* __begin_;
  size_t __size_;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 initializer_list(const _Ep* __b, size_t __s) noexcept
      : __begin_(__b), __size_(__s) {}

public:
  typedef _Ep value_type;
  typedef const _Ep& reference;
  typedef const _Ep& const_reference;
  typedef size_t size_type;

  typedef const _Ep* iterator;
  typedef const _Ep* const_iterator;

  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 initializer_list() noexcept : __begin_(nullptr), __size_(0) {}

  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Ep* data() const noexcept {
    return __begin_;
  }

  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 size_t size() const noexcept { return __size_; }

  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool empty() const noexcept {
    return __size_ == 0;
  }

  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Ep* begin() const noexcept {
    return __begin_;
  }

  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Ep* end() const noexcept {
    return __begin_ + __size_;
  }
};

} // namespace std

#  endif // _LIBCPP_CXX03_LANG

#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)

#endif // _LIBCPP_INITIALIZER_LIST