Class DiffComplex

tools/ktx/command_compare.cpp:389–429

template <typename T>
struct DiffComplex {
    DiffComplex(const std::string_view textHeaderIn, const std::string_view jsonPathIn,
        const std::optional<T>& value1, const std::optional<T>& value2)
        : textHeader(textHeaderIn), jsonPath(jsonPathIn), values(),
          different((value1.has_value() && value2.has_value())
            ? value1->isDifferent(*value2)
            : (!value1.has_value() || !value2.has_value()) ? true : false) {
        values[0] = value1;
        values[1] = value2;
    }

    DiffComplex(const std::string_view textHeaderIn, const std::string_view jsonPathIn,
        const T& value1, const T& value2)
        : textHeader(textHeaderIn), jsonPath(jsonPathIn), values(), different(value1.different(value2)) {
        values[0] = value1;
        values[1] = value2;
    }

    const std::string_view textHeader;
    const std::string_view jsonPath;

    bool isDifferent() const {
        return different;
    }

    bool hasValue(std::size_t index) const {
        return values[index].has_value();
    }

    void printText(std::size_t index, PrintIndent& out, const char* prefix) const {
        values[index]->printText(out, prefix);
    }

    void printJson(std::size_t index, PrintIndent& out, int indent, const char* space, const char* nl) const {
        values[index]->printJson(out, indent, space, nl);
    }

private:
    std::optional<T> values[2];
    const bool different;
};


struct DiffTextCustom {