Method to_string

compiler/test/kernel/common/src/checker.cpp:68–79

}

std::string Index::to_string() const {
    std::string res = "";
    res.append("{");
    res.append("array=");
    res.append(m_array.to_string());
    res.append(",linear=");
    res.append(std::to_string(m_linear));
    res.append(",offset=");
    res.append(std::to_string(m_offset));
    res.append("}");
    return res;
}
static inline float diff(float x, float y) {
    return x - y;
}