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C++ copy move constructor assignment examples

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José Roberto Miranda answered on October 21, 2022 Popularity 2/10 Helpfulness 1/10

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C++ copy move constructor assignment examples

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MyClass (MyClass&&);             // move-constructor
MyClass& operator= (MyClass&&);  // move-assignment

Popularity 2/10 Helpfulness 1/10 Language matlab

Source: cplusplus.com

Tags: c++ copy matlab move-constructor

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Contributed on Oct 21 2022

José Roberto Miranda

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C++ copy move constructor assignment examples

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MyClass fn();            // function returning a MyClass object
MyClass foo;             // default constructor
MyClass bar = foo;       // copy constructor
MyClass baz = fn();      // move constructor
foo = bar;               // copy assignment
baz = MyClass();         // move assignment

Popularity 2/10 Helpfulness 1/10 Language matlab

Source: cplusplus.com

Tags: copy c++ matlab move-constructor

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Contributed on Oct 21 2022

José Roberto Miranda

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C++ move constructor assignment example

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// move constructor/assignment
#include <iostream>
#include <string>
using namespace std;

class Example6 {
    string* ptr;
  public:
    Example6 (const string& str) : ptr(new string(str)) {}
    ~Example6 () {delete ptr;}
    // move constructor
    Example6 (Example6&& x) : ptr(x.ptr) {x.ptr=nullptr;}
    // move assignment
    Example6& operator= (Example6&& x) {
      delete ptr; 
      ptr = x.ptr;
      x.ptr=nullptr;
      return *this;
    }
    // access content:
    const string& content() const {return *ptr;}
    // addition:
    Example6 operator+(const Example6& rhs) {
      return Example6(content()+rhs.content());
    }
};


int main () {
  Example6 foo ("Exam");
  Example6 bar = Example6("ple");   // move-construction
  
  foo = foo + bar;                  // move-assignment

  cout << "foo's content: " << foo.content() << '\n';
  return 0;
}

Popularity 4/10 Helpfulness 1/10 Language matlab

Source: cplusplus.com

Tags: move-constructor c++ matlab

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Contributed on Oct 21 2022

José Roberto Miranda

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