Method find

tests/framework/src/doctest.cpp:676–683

}

String::size_type String::find(char ch, size_type pos) const {
    const char* begin = c_str();
    const char* end = begin + size();
    const char* it = begin + pos;
    for (; it < end && *it != ch; it++);
    if (it < end) { return static_cast<size_type>(it - begin); }
    else { return npos; }
}

String::size_type String::rfind(char ch, size_type pos) const {
    const char* begin = c_str();