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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the BastionOS freestanding C++ standard library.
//
// The compiler generates calls to std::initializer_list's private constructor.
// The memory layout MUST match what Clang expects.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBBASTION_INITIALIZER_LIST
#define _LIBBASTION_INITIALIZER_LIST

#include <__config>
#include <cstddef>

_LIBBASTION_BEGIN_NAMESPACE_STD

template<class _Ep>
class initializer_list {
public:
    using value_type      = _Ep;
    using reference       = const _Ep&;
    using const_reference = const _Ep&;
    using size_type       = size_t;
    using iterator        = const _Ep*;
    using const_iterator  = const _Ep*;

    _LIBBASTION_NODISCARD constexpr size_type    size()  const noexcept { return __size_; }
    _LIBBASTION_NODISCARD constexpr const_iterator begin() const noexcept { return __begin_; }
    _LIBBASTION_NODISCARD constexpr const_iterator end()   const noexcept { return __begin_ + __size_; }

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

private:
    // Clang constructs initializer_list with (pointer, size).
    // This constructor and the field order MUST match the compiler's ABI.
    constexpr initializer_list(const _Ep* __b, size_t __s) noexcept
        : __begin_(__b), __size_(__s) {}

    const _Ep* __begin_;
    size_t     __size_;
};

template<class _Ep>
_LIBBASTION_NODISCARD inline constexpr const _Ep* begin(initializer_list<_Ep> __il) noexcept {
    return __il.begin();
}

template<class _Ep>
_LIBBASTION_NODISCARD inline constexpr const _Ep* end(initializer_list<_Ep> __il) noexcept {
    return __il.end();
}

_LIBBASTION_END_NAMESPACE_STD

#endif // _LIBBASTION_INITIALIZER_LIST