why does the following throw this error:
为什么会出现以下错误:
IntelliSense: qualifiers dropped in binding reference of type "string &" to initializer of type "const string"
智能感知:限定符在类型“字符串&”的绑定引用中下降，用于类型“const字符串”的初始化器。
.h
. h
class A
{
public:
wstring& GetTitle() const;
private:
wstring title;
};
.cpp
. cpp
wstring& GetTitle() const
{
return this->title;
}
If i remove the const word, it stops complaining, and yet i have never made any changes to the variable?
如果我删除了const单词，它就停止了抱怨，但是我从来没有对变量做过任何更改?
1 个解决方案
#1
5
By returning a non-const reference to a member of your class, you are giving the caller access to the object as if it's non const. But GetTitle, being a const function, does not have the right to grant that access.
通过将非const引用返回给类中的成员，您就可以让调用者访问该对象，就像它是非const一样。但是GetTitle，作为一个const函数，没有授予访问权限的权利。
For example:
例如:
A a;
string& b = a.GetTitle(); // Allows control over original variable
#1
5
By returning a non-const reference to a member of your class, you are giving the caller access to the object as if it's non const. But GetTitle, being a const function, does not have the right to grant that access.
通过将非const引用返回给类中的成员，您就可以让调用者访问该对象，就像它是非const一样。但是GetTitle，作为一个const函数，没有授予访问权限的权利。
For example:
例如:
A a;
string& b = a.GetTitle(); // Allows control over original variable