Dune::null_deleter< T > Struct Template Reference

implements the Deleter concept of shared_ptr without deleting anything More...

#include <dune/common/shared_ptr.hh>

Related Functions
(Note that these are not member functions.)
template<typename T >
shared_ptr< T >	stackobject_to_shared_ptr (T &t)
	Create a shared_ptr for a stack-allocated object. More...
template<typename T , typename T2 >
std::enable_if_t< not std::is_same< T, T2 >::value, shared_ptr< T > >	stackobject_to_shared_ptr (T2 &t)
	Create a shared_ptr to a base class for a stack-allocated object. More...

Detailed Description

template<class T>
struct Dune::null_deleter< T >

implements the Deleter concept of shared_ptr without deleting anything

If you allocate an object on the stack, but want to pass it to a class or function as a shared_ptr, you can use this deleter to avoid accidental deletion of the stack-allocated object.

For convenience we provide two free functions to create a shared_ptr from a stack-allocated object (

See also

stackobject_to_shared_ptr):

1) Convert a stack-allocated object to a shared_ptr:

int i = 10;
shared_ptr<int> pi = stackobject_to_shared_ptr(i);

2) Convert a stack-allocated object to a shared_ptr of a base class

class A {};
class B : public A {};
 
...
 
B b;
shared_ptr<A> pa = stackobject_to_shared_ptr<A>(b);

Template Parameters

T	type of the stack-allocated object

Friends And Related Function Documentation

stackobject_to_shared_ptr() [1/2]

template<typename T >

shared_ptr< T > stackobject_to_shared_ptr ( T &  t )

related

Create a shared_ptr for a stack-allocated object.

#include <dune/common/shared_ptr.hh>

Usage:

int i = 10;
shared_ptr<int> pi = stackobject_to_shared_ptr(i);

The shared_ptr points to the object on the stack, but its deleter is set to an instance of null_deleter so that nothing happens when the shared_ptr is destroyed.

See also

shared_ptr, null_deleter

stackobject_to_shared_ptr() [2/2]

template<typename T , typename T2 >

std::enable_if_t< not std::is_same< T, T2 >::value, shared_ptr< T > > stackobject_to_shared_ptr ( T2 &  t )

related

Create a shared_ptr to a base class for a stack-allocated object.

#include <dune/common/shared_ptr.hh>

Usage:

class A {};
class B : public A {};
 
...
 
B b;
shared_ptr<A> pa = stackobject_to_shared_ptr<A>(b);

The shared_ptr points to the object on the stack, but its deleter is set to an instance of null_deleter so that nothing happens when the shared_ptr is destroyed.

See also

shared_ptr, null_deleter

Deprecated:

"Do not use the explicit casting version of stackobject_to_shared_ptr, just assign the result to a shared_ptr to the base class"

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The documentation for this struct was generated from the following file:

• dune/common/shared_ptr.hh