Examples: throw an exception when no stream could be resolved instead of passing results[0] to the stream_inlet constructor

Author: tstenner

examples/ReceiveData.cpp

@@ -39,6 +39,7 @@ int main(int argc, char* argv[]) {
 	// resolve the stream of interet
 	std::cout << "Now resolving streams..." << std::endl;
 	std::vector<lsl::stream_info> results = lsl::resolve_stream(field, value);
+	if(results.empty()) throw std::runtime_error("No stream found");
 
 	std::cout << "Here is what was resolved: " << std::endl;
 	std::cout << results[0].as_xml() << std::endl;

examples/ReceiveDataC.c

@@ -16,7 +16,7 @@ int main(int argc, char* argv[]) {
 
 	/* resolve the stream of interest (result array: info, array capacity: 1 element, type shall be EEG, resolve at least 1 stream, wait forever if necessary) */
 	printf("Now waiting for an EEG stream...\n");
-	lsl_resolve_byprop(&info,1, "type","EEG", 1, LSL_FOREVER);
+	lsl_resolve_byprop(&info, 1, "type","EEG", 1, LSL_FOREVER);
 
 	/* make an inlet to read data from the stream (buffer max. 300 seconds of data, no preference regarding chunking, automatic recovery enabled) */
 	inlet = lsl_create_inlet(info, 300, LSL_NO_PREFERENCE, 1);

examples/ReceiveDataInChunks.cpp

@@ -13,7 +13,7 @@ int main(int, char* []) {
 	try {
 
 		// resolve the stream of interest & make an inlet
-		lsl::stream_inlet inlet(lsl::resolve_stream("name", "MyAudioStream")[0]);
+		lsl::stream_inlet inlet(lsl::resolve_stream("name", "MyAudioStream").at(0));
 
 		// and retrieve the chunks (note: this can of course also be done with pure std::vectors
 		// instead of stereo_samples)

examples/ReceiveDataSimple.cpp

@@ -11,7 +11,7 @@ int main(int argc, char** argv) {
 
 	// resolve the stream of interest & make an inlet to get data from the first result
 	std::vector<stream_info> results = resolve_stream("name", argc > 1 ? argv[1] : "SimpleStream");
-	stream_inlet inlet(results[0]);
+	stream_inlet inlet(results.at(0));
 
 	// receive data & time stamps forever (not displaying them here)
 	std::vector<float> sample;