C ++指针分配运算符重载（不仅对象分配，而且指针分配） [英] c++ pointer assignment operator overload(not just object assignment but pointer assignment)

问题描述

是否有一种方法可以重载指针分配运算符？
例如当

Is there a way to overload the pointer assignment operator? e.g. overload pointer assignment operator for class A when

A *x, *y;
x = y;

推荐答案

不，这是不可能的。指针类型是标量类型，但是重载运算符需要一个非标量参数。特别是（[over.oper] p6）：

No, this is not possible. Pointer types are scalar types, but overloading operators requires a non-scalar parameter. In particular ([over.oper]p6):

运算符函数应为非静态成员函数或为非静态成员函数。具有
至少一个参数的成员函数，该参数的类型是类，对类的引用，枚举或对
枚举的引用。

An operator function shall either be a non-static member function or be a non-member function that has at least one parameter whose type is a class, a reference to a class, an enumeration, or a reference to an enumeration.

如果您有一个二进制运算符，其中一个参数是用户定义的类型，另一个参数是指针，则可以使用，但是在您要询问的情况下， 操作数是指针。

If you had a binary operator where one parameter was a user-defined type and the other a pointer, that would work, but in the situation you're asking about, both operands are pointers.

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