This question was closed Jun 12, 2018 at 12:30 PM by GregoryFenn for the following reason:

Question is off-topic or not relevant

Question by GregoryFenn · Jun 12, 2018 at 12:27 PM · c#functions parameters methods

Optional parameter, editor raises error "Unexpected symbol `=' "

I have a very simple maths function with an optional parameter, used in Unity 2018.2.0b5

 bool IsApproxEqual(float x, float y, scaler = 1.5f){   // line 15
         // float params to handle ints and floats (but not doubles like 3.4, use 3.4f instead)
         return (Mathf.Abs(x - y) < scaler*Mathf.Epsilon);
     }

and this syntax fits that given in reference [1]. Further, Microsoft offer the following example [2]:

 public void ExampleMethod(int required, string optionalstr = "default string",  int optionalint = 10)

and yet, the compiler insists on raising the error: Assets/_MyAssets/Scripts/EnemyBehaviour.cs(15,48): error CS1525: Unexpected symbol `='

Does anyone know what I'm doing wrong?

[1] https://www.dotnetperls.com/optional-parameters

[2] https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/named-and-optional-arguments

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