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- int ParseInt(const std::string & value, int * val);
- int ParseUnsigned(const std::string & value, unsigned * val);
- int ParseIntInRange(const std::string & value, int min, int max, int * val);
- int ParseUnsignedInRange(const std::string & value, unsigned min, unsigned max, unsigned * val);
- int ParseYesNo(const std::string & value, bool * val);