Operator_SubtractRight Method

Used to overload the - operator, providing custom functionality. Operator_SubtractRight is the same as Operator_Subtract but the implicit Self instance is on the right instead of the left in the subtraction.

Syntax

# Notes

Create an Operator_SubtractRight function in a class to specify the functionality of the + operator for that class.

The ordinary methods are always preferred; REALbasic uses the Right versions only if there is no legal left version.

# Example

Suppose you have a class, Vector, that can store a vector. To define the - operator for this class, create a method of the Vector class called Operator_SubtractRight.

The Vector class has two Integer properties, x and y.

Operator_SubtractRight is defined as:

Function Operator_SubtractRight (lhs as Vector) as Vector
//lhs stands for left-hand-side, the vector to be added to Self
Dim ret as New Vector //the difference between the two vectors
ret.x=lhs.x + Self.x
ret.y=lhs.y + Self.y
Return ret

# See Also

- operator, Operator_Subtract function.