Class SpanWriter

src/streams.h:129–157

Minimal stream for writing to an existing span of bytes. */

/** Minimal stream for writing to an existing span of bytes.
 */
class SpanWriter
{
private:
    std::span<std::byte> m_dest;

public:
    explicit SpanWriter(std::span<std::byte> dest) : m_dest{dest} {}
    template <typename... Args>
    SpanWriter(std::span<std::byte> dest, Args&&... args) : SpanWriter{dest}
    {
        ::SerializeMany(*this, std::forward<Args>(args)...);
    }

    void write(std::span<const std::byte> src)
    {
        if (src.size() > m_dest.size()) {
            throw std::ios_base::failure("SpanWriter::write(): exceeded buffer size");
        }
        memcpy(m_dest.data(), src.data(), src.size());
        m_dest = m_dest.subspan(src.size());
    }

    template<typename T>
    SpanWriter& operator<<(const T& obj)
    {
        ::Serialize(*this, obj);
        return *this;
    }
};

/** Double ended buffer combining vector and stream-like interfaces.
 *