FrameId.h

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#ifndef FRAMEID_H_INCLUDED
#define FRAMEID_H_INCLUDED
 
#include <cstddef>
#include <cstdint>
#include <exception>
#include <limits>
 
struct FrameId {
    static constexpr uint32_t Invalid = std::numeric_limits<uint32_t>::max();
    constexpr FrameId() :
        m_id(Invalid) {}
    constexpr FrameId(uint32_t new_id) :
        m_id(new_id) {}
 
    constexpr operator bool() const { return m_id != Invalid; }
    constexpr operator size_t() const { return m_id; }
 
    constexpr bool operator==(FrameId rhs) const { return m_id == rhs.m_id; }
    constexpr bool operator!=(FrameId rhs) const { return m_id != rhs.m_id; }
 
    constexpr bool valid() const { return m_id != Invalid; }
    constexpr size_t id() const { return m_id; }
 
private:
    uint32_t m_id;
};
 
static_assert(sizeof(FrameId) == sizeof(uint32_t) && alignof(FrameId) == alignof(uint32_t),
    "Error: FrameId sized differently than the underlying type on this platform!");
 
#endif // FRAMEID_H_INCLUDED