Problems with a custom struct ("does not contain a constructor that takes x arguments")

Questions & Answers
1

I have created a custom struct that definitely has 3 and only 3 arguments, but when I try to declare variables of that custom type, Unity tells me that my custom struct “does not contain a constructor that takes `3’ arguments.”

Here are the details. I am creating an in-game user feedback system that uses, among other things, a text console that will (hopefully) work something like the console in the Unity editor. (But for messages relevant to the player like “Fuel tanks expected to last only another 2 minutes at this speed” or “No torpedoes remaining, you must find new torpedoes” etc.)

To help me out, I have created two enums and a custom struct as a container for the sorts of messages that will be sent:

public enum FeedbackLevel {
	Normal,
	Warning,
	Error,
}

public enum FeedbackForm {
	AudioOnly,
	Speech,
	SpeechAndText,
	Text,
}

public struct UserFeedback {
	public FeedbackForm feedbackForm;
	public FeedbackLevel feedbackLevel;
	public string feedbackMessage;
}

Then I use a global game event system to transmit UserFeedback messages to a class that’s designed to handle them.

Here’s my problem. When I am assembling the UserFeedback object, I want to be able to do it straightforwardly, like I would most any Unity struct (e.g., Vector3). So, like this:

UserFeedback uF = new UserFeedback (FeedbackForm.Text, FeedbackLevel.Normal, "Refueling complete!");

But this triggers the error that

the type 'UserFeedback' does not contain a constructor that takes '3' arguments

Now, it does work if I declare the UserFeedback object the long way:

UserFeedback uF;
uF.feedbackForm = FeedbackForm.Text;
uF.feedbackLevel = FeedbackLevel.Normal;
uF.feedbackMessage = "Refueling complete!";

This works just fine. But it’s clunky. Why won’t C# allow me to construct it on one line with the “new” keyword, like I would a Vector3 or any other struct?

Thanks in advance.

2

You have to define the constructor.

 public struct UserFeedback {
     public FeedbackForm feedbackForm;
     public FeedbackLevel feedbackLevel;
     public string feedbackMessage;

     public UserFeedback(FeedbackForm ff, FeedbackLevel fl, string fm) {
     feedbackForm = ff;
     feedbackLevel = fl;
     feedbackMessage = fm;
}
 }