// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 2019-2022  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#ifndef _NONSTD_SPAN_H_
#define _NONSTD_SPAN_H_

// Remove this and use std::span when available (c++20)

template<class ElementType> class span
{
public:
	constexpr span() noexcept
	{
		data_ = NULL; size_ = 0;
	}
	constexpr span(ElementType* first, size_t count) noexcept
	{
		data_ = first; size_ = count;
	}
	constexpr span(ElementType* first, ElementType* end) noexcept
	{
		data_ = first; size_ = end - first;
	}
	template<size_t N> constexpr span(ElementType(&arr)[N]) noexcept
	{
		data_ = arr; size_ = N;
	}

	size_t size() const { return size_; }
	size_t size_bytes() const { return size_ * sizeof(ElementType); }
	ElementType& operator[](size_t idx) const { return data_[idx]; }

	ElementType* begin() const { return data_; }
	ElementType* end() const { return data_ + size_; }

protected:
	ElementType* data_;
	size_t size_;
};

#endif