Class buffer

include/boost/json/detail/buffer.hpp:23–140

// A simple string-like temporary static buffer
template<std::size_t N>
class buffer
{
public:
    using size_type = std::size_t;

    buffer() = default;

    bool
    empty() const noexcept
    {
        return size_ == 0;
    }

    string_view
    get() const noexcept
    {
        return {buf_, size_};
    }

    operator string_view() const noexcept
    {
        return get();
    }

    char const*
    data() const noexcept
    {
        return buf_;
    }

    size_type
    size() const noexcept
    {
        return size_;
    }

    size_type
    capacity() const noexcept
    {
        return N - size_;
    }

    size_type
    max_size() const noexcept
    {
        return N;
    }

    void
    clear() noexcept
    {
        size_ = 0;
    }

    void
    push_back(char ch) noexcept
    {
        BOOST_ASSERT(capacity() > 0);