Move assignment operator: Difference between revisions

Revision as of 00:15, 10 October 2018

Revision as of 12:01, 12 June 2019

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An implementation of the move assignment operator:<ref>{{Cite web|title = Move Constructors and Move Assignment Operators (C++)|url = https://msdn.microsoft.com/en-us/library/dd293665.aspx|website = msdn.microsoft.com|access-date = 2016-02-23}}</ref><syntaxhighlight lang="c++">

class Resource {

void* data;

public:

Resource& operator=(Resource&& other) {

if (this != &other) { // If the object isn't being called on itself...

if (this != &other) {delete this->data; // IfDelete the object isn't being calleds onoriginal itselfdata.

delete this->data; = other.data; // DeleteCopy the other object's data into this object.

this->other.data = other.datanullptr; // "Move"Finally, reset the other object's data into the current objectpointer.

other.data = nullptr; // Mark the other object as "empty"

}

return *this; // return *this

}

void* data;

};

</syntaxhighlight>A more practical example:<syntaxhighlight lang="c++">

class String {

char* text;

public:

String& operator=(String&& otherString) {

if (this != &otherString) {

delete[] text;

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return *this;

}

char* text;

};

</syntaxhighlight>