Function is_identifier_numeric

src/StubExecutable/Semver200_parser.cpp:101–103

		}

		inline bool is_identifier_numeric(const string& id) {
			return id.find_first_not_of("0123456789") == string::npos;
		}

		inline bool check_for_leading_0(const string& str) {
			return str.length() > 1 && str[0] == '0';