/// does the std::string represent an unsigned integer value ?
bool isStrUnsignedInt(std::string const & str);
-///
-int strToInt(std::string const & str);
-
-/// convert string to an unsigned integer
-unsigned int strToUnsignedInt(std::string const & str);
-
///
bool isStrDbl(std::string const & str);
-///
-double strToDbl(std::string const & str);
-
///
char lowercase(char c);