CLSS.Constants.NoOp

Problem

How do you initialize a System.Action? If you do this:

Action OnEvent = null;

You will have to null-check this delegate on every invocation.

To avoid null-checks, you can initialize it to a lambda that does nothing (in other word, a "No-Op"):

Action OnEvent = delegate { };

But everytime you write an anonymous method, there is an allocation. So this will allocate 4 different runtime methods, all doing nothing:

Action OnEvent1 = delegate { };
Action OnEvent2 = delegate { };
Action OnEvent3 = delegate { };
Action OnEvent4 = delegate { };

Solution

CLSS.Constants.NoOp is a collection of statically-defined No-Op methods that can be used in any place you would want to use a no-op anonymous method to avoid unnecessary memory allocations.

Example:

using CLSS;

Action OnEvent1 = NoOp.Method;
Action OnEvent2 = NoOp.Method;
Action OnEvent3 = NoOp.Method;
Action OnEvent4 = NoOp.Method;

Multi-argument No-Op:

using CLSS;

Action<float, int> OnEvent = NoOp.Method<float, int>;

This package is a part of the C# Language Syntactic Sugar suite.