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#pragma once
#include "asl/meta.hpp"
#include "asl/annotations.hpp"
#include "asl/layout.hpp"
namespace asl
{
static constexpr int64_t dynamic_size = -1;
template<is_object T, int64_t kSize = dynamic_size>
class span
{
static constexpr bool kIsDynamic = kSize < 0;
using SizeType = select_t<kIsDynamic, int64_t, empty>;
T* m_data{};
ASL_NO_UNIQUE_ADDRESS SizeType m_size{};
public:
constexpr span() = default;
constexpr span(const span&) = default;
constexpr span(span&&) = default;
constexpr span& operator=(const span&) = default;
constexpr span& operator=(span&&) = default;
~span() = default;
constexpr int64_t size() const
{
if constexpr (kIsDynamic) { return m_size; }
else { return kSize; }
}
constexpr int64_t size_bytes() const { return size() * size_of<T>; }
constexpr bool is_empty() const { return size() == 0; }
};
} // namespace asl
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