qb::nocopy Struct Reference

Base class to make derived classes non-copyable. More...

#include <nocopy.h>

Inheritance diagram for qb::nocopy:

Public Member Functions
	nocopy ()=default
	Default constructor.
	nocopy (nocopy const &)=delete
	Deleted copy constructor.
	nocopy (nocopy const &&)=delete
	Deleted move constructor.
nocopy &	operator= (nocopy const &)=delete
	Deleted copy assignment operator.
nocopy &	operator= (nocopy &&)=delete
	Deleted move assignment operator.

Detailed Description

Base class to make derived classes non-copyable.

Classes that inherit from this struct (usually via private inheritance) will have their copy constructor and copy assignment operator deleted, effectively preventing instances of the derived class from being copied. Their move constructor and move assignment operator are also deleted here to enforce non-movable semantics by default as well, unless explicitly re-enabled by the derived class.

This is useful for classes that manage unique resources (like file handles, network connections, or actor identities) where copying would be complex, semantically incorrect, or resource-intensive.

Usage example:

class MyResourceWrapper : private qb::nocopy {
public:
  MyResourceWrapper() { // acquire resource  }
  ~MyResourceWrapper() { // release resource  }
  // ... other methods ...
};
 
// MyResourceWrapper obj1;
// MyResourceWrapper obj2 = obj1; // Compile error: copy constructor is deleted
// obj1 = obj2;                 // Compile error: copy assignment is deleted

Constructor & Destructor Documentation

nocopy() [1/3]

qb::nocopy::nocopy ( )

default

Default constructor.

Allows derived classes to be default-constructed if appropriate.

nocopy() [2/3]

qb::nocopy::nocopy ( nocopy const & )

delete

Deleted copy constructor.

Prevents copying of derived class instances.

nocopy() [3/3]

qb::nocopy::nocopy ( nocopy const && )

delete

Deleted move constructor.

Prevents moving of derived class instances by default.

Member Function Documentation

operator=() [1/2]

nocopy & qb::nocopy::operator= ( nocopy const & )

delete

Deleted copy assignment operator.

Prevents copy assignment of derived class instances.

operator=() [2/2]

nocopy & qb::nocopy::operator= ( nocopy && )

delete

Deleted move assignment operator.

Prevents move assignment of derived class instances by default.