xref: /llvm-project-15.0.7/libcxx/include/initializer_list (revision 412dbebe)

// -*- C++ -*-
//===----------------------- initializer_list -----------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#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();

    size_t   size()  const;
    const E* begin() const;
    const E* end()   const;
};

template<class E> const E* begin(initializer_list<E> il);
template<class E> const E* end(initializer_list<E> il);

}  // std

*/

#include <__config>
#include <cstddef>

#pragma GCC system_header

namespace std  // purposefully not versioned
{

template<class _E>
class _LIBCPP_VISIBLE initializer_list
{
    const _E* __begin_;
    size_t    __size_;

    _LIBCPP_ALWAYS_INLINE
    initializer_list(const _E* __b, size_t __s)
        : __begin_(__b),
          __size_(__s)
        {}
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;

    _LIBCPP_ALWAYS_INLINE initializer_list() : __begin_(nullptr), __size_(0) {}

    _LIBCPP_ALWAYS_INLINE size_t    size()  const {return __size_;}
    _LIBCPP_ALWAYS_INLINE const _E* begin() const {return __begin_;}
    _LIBCPP_ALWAYS_INLINE const _E* end()   const {return __begin_ + __size_;}
};

template<class _E>
inline _LIBCPP_INLINE_VISIBILITY
const _E*
begin(initializer_list<_E> __il)
{
    return __il.begin();
}

template<class _E>
inline _LIBCPP_INLINE_VISIBILITY
const _E*
end(initializer_list<_E> __il)
{
    return __il.end();
}

}  // std

#endif  // _LIBCPP_INITIALIZER_LIST