operator keyword

operator keyword

Function call syntax for operators

---

  operator-function-id  ::= operator  op-symbol  operator  op-symbol  < [  template-arg-list  ] >  conversion-function-id  ::= operator  conversion-type-id   conversion-type-id  ::=  type-specifier-seq  [  conversion-declarator  ]  conversion-declarator  ::=  ptr-operator  [  conversion-declarator  ]  ptr-operator  ::= * [  cv-qualifier-seq  ]  &  [::]  nested-name  :: * [  cv-qualifier-seq  ] 

The operator keyword converts an operator symbol into function notation. You can use the operator keyword when invoking an operator or when overloading an operator.

Example

 int x =  operator  +(10, 32); complex<double> c, d; c.  operator  +=(d); operator+=(c, d); // Same as above bigint  operator  *(const bigint& a, const bigint* b); 

Table 12-1 lists the operator symbols ( op-symbol ) that can be overloaded. Alternative tokens (shown in parentheses) are interchangeable with their symbolic equivalents.

Table 12-1. Operator symbols that can be overloaded

delete	/	=	%=	<<=	++
delete [ ]	%	<	^= ( xor_eq )	==	--
new	^ ( xor )	>	&= ( and_eq )	!= ( not_eq )	,
new [ ]	& ( bitand )	+=	= ( or_eq )	<=	->*
+	( bitor )	-=	<<	>=	->
-	~ ( compl )	*=	>>	&& ( and )	( )
*	! ( not )	/=	>>=	( or )	[ ]

See Also

expression , identifier , template , type , Chapter 5