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#pragma once
#include "asl/integers.hpp"
#include "asl/string_view.hpp"
namespace asl
{
enum class status_code : uint8_t
{
ok = 0,
unknown = 1,
internal = 2,
runtime = 3,
invalid_argument = 4,
};
class status
{
void* m_payload{};
static constexpr void* status_to_payload(status_code code)
{
return code == status_code::ok ? nullptr : bit_cast<void*>(((uintptr_t)code << 1) | 1);
}
static constexpr status_code payload_to_status(void* payload)
{
return (status_code)(bit_cast<uintptr_t>(payload) >> 1);
}
status_code code_internal() const;
public:
constexpr status() = default;
explicit constexpr status(status_code code)
: m_payload{status_to_payload(code)}
{}
status(status_code code, string_view msg);
constexpr status(status&& other)
: m_payload{exchange(other.m_payload, nullptr)}
{}
constexpr status& operator=(status&& other)
{
if (&other != this)
{
swap(m_payload, other.m_payload);
}
return *this;
}
// @Todo Copy constructor & assignment
constexpr bool ok() const
{
return m_payload == nullptr || code() == status_code::ok;
}
// NOLINTNEXTLINE(*-explicit-conversions)
constexpr operator bool() const { return ok(); }
constexpr status_code code() const
{
if (m_payload == nullptr)
{
return status_code::ok;
}
if ((bit_cast<uintptr_t>(m_payload) & 1) != 0)
{
return payload_to_status(m_payload);
}
return code_internal();
}
};
} // namespace asl
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