Implemented Instance::getResult() with optional string result

cameo-api-cpp/ChangeLog

@@ -4,6 +4,7 @@
 * Removed Option enum and defined OUTPUSTREAM as const int.
 * Added Instance::waitFor() and Instance::waitFor(int) for python binding.
 * Implemented subscriber and requester with optional string result in receive() function.
+* Implemented Instance::getResult() with optional string result.
 
 1.0.2
 -----

cameo-api-cpp/include/Application.h

@@ -291,8 +291,8 @@ public:
 	 */
 	int getExitCode() const;
 
-	bool getBinaryResult(std::string& result);
-	bool getResult(std::string& result);
+	std::optional<std::string> getBinaryResult();
+	std::optional<std::string> getResult();
 
 	std::shared_ptr<OutputStreamSocket> getOutputStreamSocket();
 

cameo-api-cpp/src/Application.cpp

@@ -748,21 +748,19 @@ int Instance::getExitCode() const {
 	return m_exitCode;
 }
 
-bool Instance::getBinaryResult(std::string& result) {
+std::optional<std::string> Instance::getBinaryResult() {
 
 	waitFor();
-	result = m_resultData;
 
-	return m_hasResult;
-}
-
-bool Instance::getResult(std::string& result) {
+	if (m_hasResult) {
+		return m_resultData;
+	}
 
-	string bytes;
-	getBinaryResult(bytes);
-	parse(bytes, result);
+	return {};
+}
 
-	return m_hasResult;
+std::optional<std::string> Instance::getResult() {
+	return getBinaryResult();
 }
 
 std::shared_ptr<OutputStreamSocket> Instance::getOutputStreamSocket() {