Object Oriented Programming with C++, Second Edition

SUMMARY

• “operator” is a C++ keyword. It is used in operator functions. It defines a new (overloaded) action for the operator.

  Syntax:operator <operator> ( <parameters>){  lt;statements>}

• “Operator overloading” is a principle where a given operator can perform various actions depending on the nature of operands.
• The following operators cannot be overloaded:
  • Direct component selector (.),
  • C++ dereference (.*),
  • Scope resolution operator (::) ,
  • Conditional operator (?:)
• The pre-processor symbols # and ## cannot be overloaded.
• We cannot write friend functions to overload following operators:
  • Function call ()
  • Array subscript []
  • C++ indirect component selector ->
  • Simple assignment =
• We cannot change the arity (i.e. number of operands associated ...