Function parse_points

tests/test_phase6.cpp:27–53

};

static std::vector<sam3_point> parse_points(const std::string & field) {
    std::vector<sam3_point> pts;
    if (field.empty()) {
        return pts;
    }

    size_t start = 0;
    while (start < field.size()) {
        size_t end = field.find('|', start);
        if (end == std::string::npos) {
            end = field.size();
        }

        const std::string part = field.substr(start, end - start);
        size_t colon = part.find(':');
        if (colon != std::string::npos) {
            sam3_point pt;
            pt.x = std::stof(part.substr(0, colon));
            pt.y = std::stof(part.substr(colon + 1));
            pts.push_back(pt);
        }

        start = end + 1;
    }

    return pts;
}

static bool parse_box(const std::string & field, sam3_box & box) {
    if (field.empty()) {