CS202
6- ‹#›
Overloading [] Operator
nThe subscript operator should be overloaded as a member; the first operand must be an object of the
class
nTo be consistent, the
second operand should be an integer
index. Passed by value as it isn’t changed by the operator.
nSince the first operand
is not modified (i.e., the current object
is not modified), it should be specified as a constant member -- although exceptions are common.
nThe residual value should
be the data type of the “element”
of the “array” being indexed, by reference.
nThe residual value is an lvalue -- not an rvalue!