C + + Operator overloading

I. Overloading rules

I. Operators that can be overloaded

+	-	*	/	%
^	&	|	~	!
=	>	<	+=	-=
*=	/=	%=	^=	&=
|=	>>	<<	>>=	<<=
==	!=	>=	<=	&&
||	++	--	->*	,
-	[]	()	operator NEW	Operator New[]
operator delete	operator delete []

Ii. operators that cannot be overloaded

::	.	.*	? :
sizeof	typeID	New	Delete
Static_cast	dynamic_cast	Const_cast	Reinterpret_cast

III. Basic Rules

1. The unary operator can be a member function without parameters [1] or a non-member function with one parameter [1].
2. The two-dollar operator can be a member function with one parameter [1] or a non-member function with two arguments [1].
3.operator=, operator[], operator (), operator-> can only be defined as member functions [1].
The return value of the 4.operator-> must be a pointer or an object that can be used.
5. Overloads operator++ and operator--with an int parameter representing the suffix, prefixed with no parameters.
6. In addition to operator new AND operator Delete, there must be at least one non-built-in data type in the overloaded operator parameter.
[email protected] The search scope is: X member function---Global function/x function in the namespace function/y The friend of the/x in the name space
The friend function of number/y.
8. Overloaded operators should try to simulate the behavior of the operator's built-in type.

C + + Operator overloading