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Source Code

The OverloadedOps project is located under the Chapter 12 subdirectory.

Understanding Custom Type Conversions

Let’s now examine a topic closely related to operator overloading: custom type conversions. To set

the stage for the discussion to follow, let’s quickly review the notion of explicit and implicit conver-

sions between numerical data and related class types.

Recall: Numerical Conversions

In terms of the intrinsic numerical types (sbyte, int, float, etc.), an explicit conversion is required

when you attempt to store a larger value in a smaller container, as this may result in a loss of data.

Basically, this is your way to tell the compiler, “Leave me alone, I know what I am trying to do.” Con-

versely, an 

implicit conversion happens automatically when you attempt to place a smaller type in a

destination type that will not result in a loss of data:

static void Main()

{

int a = 123;

long b = a;       // Implicit conversion from int to long

int c = (int) b;  // Explicit conversion from long to int

}