QL code and tests for C#/C++/JavaScript.

cpp/ql/test/library-tests/string_analysis/string_analysis.cpp

@@ -0,0 +1,44 @@
+int main(int argc, char *argv[])
+{
+	char *str1, *str2, *str3, *result;
+	int cond1, cond2, cond3, cond4;
+
+	str1 = "1";
+	str2 = "22";
+	str3 = "333";
+
+	result = str1; // max length 1
+	if (cond1)
+	{
+		result = (cond2 ? str2 : str3); // max length 3
+	}
+	result = (cond3 ? str1 : result); // max length 3
+	result = (cond4 ? str1 : argv[0]); // max unknown
+
+	return 0;
+}
+
+namespace std
+{
+	class string
+	{
+	public:
+		string(char *_str) : str(_str) {};
+		~string() {};
+
+		string &operator=(string &other) {
+			str = other.str;
+		};
+
+	private:
+		char *str;
+	};
+}
+
+void more_cases()
+{
+	wchar_t *wstr1 = L"4444";
+	wchar_t *wstr2 = wstr1;
+	std::string str1 = "666666";
+	std::string str2 = str1;
+}