copy-constructor

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Does such an optimization exist in g++?

Consider the following code snippet: list<someClass>& method(); .... list<someClass> test = method();[详细]

2023-01-06 12:50 分类：问答
C++ auto_ptr and copy construction

If I have a class template <typename T> struct C { ... private: auto_ptr<T> ptr; 开发者_如何学运维};[详细]

2023-01-04 10:35 分类：问答
Preventing copy construction and assignment of a return value reference

If I have a function that returns a reference to an instance of a class that I don\'t have control over its source, say list<int>:[详细]

2023-01-04 08:29 分类：问答
Can reflection be used to instantiate an objects base class properties?

Like this: public class remoteStatusCounts : RemoteStatus { public int statusCount; public remoteStatusCounts(RemoteStatus r)[详细]

2023-01-04 04:08 分类：问答
Can I pass a pointer to a superclass, but create a copy of the child?

I have a function that takes a pointer to a superclass and performs operations on it. However, at some point, the f开发者_JAVA技巧unction must make a deep copy of the inputted object. Is there any way[详细]

2023-01-03 16:07 分类：问答
Is there a good way to copy a Gtk widget?

Is there a way, using the Gtk library in C, to clone a Gtk button (for instance), and pack it somewhere else in the app. I know you can\'t pack the same widget twice. And that this code obviously woul[详细]

2023-01-03 07:08 分类：问答
destructor and copy-constructor calling..(why does it get called at these times)

I have the following code #include <iostream> using namespace std; class Object { public: Object(int id){[详细]

2023-01-02 16:41 分类：问答
Copy constructor demo (crashing... case 2)

Please have a glance at this program: class CopyCon { public: char *name; CopyCon() { name = new char[20]; name = \"Hai\";//_tc开发者_开发技巧scpy(name,\"Hai\");[详细]

2023-01-02 07:34 分类：问答
c++ STL vector is not acccepting the copy constructor

I wrote a code ( c++,visual studio 2010) which is having a vector, even I though copy const is declared, but is still showing that copy const is not declared[详细]

2023-01-02 00:07 分类：问答
In C++, what happens when you return a variable?

What happens, step by step, when a variable is returned. I know that if it\'s a built-in and fits, it\'s thrown into rax/eax/ax. What happens when it doesn\'t fit, and开发者_如何学运维/or isn\'t built[详细]

2023-01-01 18:09 分类：问答