initialize boost shared_ptr to null

template class shared_ptr { public: explicit shared_ptr(T * p s_obj now hol...

template class shared_ptr { public: explicit shared_ptr(T * p s_obj now holds a null pointer and evaluates to boolean false when.

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The default construction does this for you: template class shared_ptr { pub...

The default construction does this for you: template class shared_ptr { public: explicit shared_ptr(T * p = 0): px(p) { //Snip } // private: T.

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Your suggestion (calling the shared_ptr constructor with no argument) is co...

Your suggestion (calling the shared_ptr constructor with no argument) is correct. (Calling the constructor with the value 0 is equivalent.).

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There is no need to use that hack to get a null (empty) shared_ptr. Simply ...

There is no need to use that hack to get a null (empty) shared_ptr. Simply use the default constructor: std::shared_ptr pInv; // starts.

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Dear C++'ers. I am experimenting with boost shared_pointers. My Classe...

Dear C++'ers. I am experimenting with boost shared_pointers. My Classes class A { private: typedef boost::shared_ptr.

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I'm quite new to boost::smartPtr's and i wonder: If I declare a b...

I'm quite new to boost::smartPtr's and i wonder: If I declare a boost::shared_ptr in a header file, how should I initialize it properly in the source file? void foo(int p1, shared_ptr p2 = shared_ptr(), int *p3 = NULL) { }.

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to the boost docs, it's always best to initialize a shared_ptr at crea...

to the boost docs, it's always best to initialize a shared_ptr at creation also specifies that the post-conditions of the nullary constructor (the.

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shared_ptr deletes the exact pointer that has been passed at construction t...

shared_ptr deletes the exact pointer that has been passed at construction time, complete with its original type, regardless of the template parameter. In the.

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The shared_ptr class template stores a pointer to a dynamically allocated o...

The shared_ptr class template stores a pointer to a dynamically allocated object, typically with a C++ new-expression. The object pointed to is guaranteed to be.

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A shared_ptr may also own no objects, in which case it is called empty (an ...

A shared_ptr may also own no objects, in which case it is called empty (an empty shared_ptr may have a non-null stored pointer if the aliasing.

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boost::weak_ptr must be initialized with a boost::shared_ptr. Its most impo...

boost::weak_ptr must be initialized with a boost::shared_ptr. Its most important member If not, the shared pointer is set to 0 and is equivalent to a null pointer.

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The Boost library is a set of peer-reviewed C++ libraries that play well wi...

The Boost library is a set of peer-reviewed C++ libraries that play well with STL, and some of them are If you mainly need to use shared_ptr to put smart pointers in containers (since That's because the temporary fptr is initialized with a reference count of 1. This is equivalent to NULL for raw pointers.

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I've seen some people simply use a static shared_ptr but I don't ...

I've seen some people simply use a static shared_ptr but I don't see how boost/dwn.220.v.ua> class Singleton: boost::noncopyable { public: static std::shared_ptr Get(); ~Singleton() {singleton_ = NULL;} private . one access point, for lazy initialization, and for pooling-like optimization.

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After you initialize a shared_ptr you can copy it, pass it by value in func...

After you initialize a shared_ptr you can copy it, pass it by value in function e.g. class members, // initialize with nullptr to make your programming intent.

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is the aliasing constructor (also available in boost::shared_ptr since ). T...

is the aliasing constructor (also available in boost::shared_ptr since ). This constructor allows us to create a shared_ptr that shares ownership If, for example, we initialize a shared pointer with nullptr, then both the.

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