Class StringBuilder

include/string_builder.hpp:25–54

#include <type_traits>

class StringBuilder {
    char* buffer;
    char* current;
    size_t remaining;

public:
    StringBuilder(char* buf, size_t size);

    template<size_t N>
    StringBuilder(char (&buf)[N]) : StringBuilder(buf, N) {}

    StringBuilder& operator<<(const char* str);

    template<typename T, typename = std::enable_if_t<std::is_integral_v<T>>>
    StringBuilder& operator<<(T val) {
        if (remaining > 1) {
            auto result = std::to_chars(current, current + remaining - 1, val);
            if (result.ec == std::errc()) {
                const size_t written = result.ptr - current;
                current = result.ptr;
                remaining -= written;
                *current = '\0';
            }
            // If result.ec != std::errc(), the number is too long, so don't write anything
        }
        return *this;
    }

    const char* get() const { return buffer; }
};

#endif // __STRING_BUILDER_HPP__