revert objective-cpp to older cpp version

Author: jeff-hykin

objective-cpp/examples.mm

@@ -0,0 +1,21 @@
+- (nonnull NSArray<NSString *> *)getCameras {
+    // get list of regular cameras
+    AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession 
+        discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera]
+        mediaType:AVMediaTypeVideo 
+        position:AVCaptureDevicePositionUnspecified];
+
+    // create json object for each camera
+    NSMutableArray<NSString *> *lst = [[NSMutableArray alloc] init];
+    for (AVCaptureDevice *device in session.devices) {
+        NSString *s = @"{ ";
+        s = [s stringByAppendingFormat:@"\"id\": %@, ", device.uniqueID];
+        s = [s stringByAppendingFormat:@"\"facing\": %@, ", device.position == AVCaptureDevicePositionFront ? @"front" : @"back"];
+        s = [s stringByAppendingFormat:@"\"orientation\": 0, "];
+        s = [s stringByAppendingFormat:@"\"forcedShutterSound\": false"];
+        s = [s stringByAppendingString:@" }"];
+        [lst addObject:s];
+    }
+
+    return lst;
+}