keywords-operator

• Overview
• Overriding a unary operator
  • Overriding the unary ++ and -- operators
• Overriding a binary operator
• Overriding a trinary operator

Overview

Used to override a default operator with a custom one for the class. Not all operators can be overridden. You aren't allowed to declare new operators. For more on operators in general and which operators can be overridden, see [Operators]. For more on how to declare a custom operator, see [Custom operators].

All custom operators must be a static member of a class that the operator will take as a parameter. You are allowed to overload your custom operators.

Overriding a unary operator

(\public\|\protected\|\private\) override operator operator_id /type/ identifier
    returns /type/
  'code
  return SomeValue

Note: For what the "/type/" means, see Type descriptors.

Overriding the unary ++ and -- operators

These operators are a little different as they can be prefixed (placed before their operand) or postfixed (placed after the operand). For this reason, each also has two keywords that might be referenced. The code below shows the prototypes you'll need.

public override operator ++ YourType (\prefix\ | \postfix\) identifier
  returns YourType

public override operator -- YourType (\prefix\ | \postfix\) identifier
  returns YourType

Overriding a binary operator

This only change here is the addition of an extra parameter. The comma is required.

(\public\|\protected\|\private\) override operator operator_id /type/ identifier1, /type/ identifier2
    returns /type/
  'code
  return SomeValue

Overriding a trinary operator

ASIL doesn't yet define any operators of this type. But if it ever does, simply extend the above syntax to pass a third parameter.