folly::enable_shared_from_this< T > Class Template Reference

#include <EnableSharedFromThis.h>

Inheritance diagram for folly::enable_shared_from_this< T >:

Public Member Functions
constexpr	enable_shared_from_this () noexcept=default
std::weak_ptr< T >	weak_from_this () noexcept
std::weak_ptr< T const >	weak_from_this () const noexcept

Private Member Functions
template<typename U >
auto	weak_from_this_ (std::enable_shared_from_this< U > *base_ptr) noexcept-> decltype(base_ptr->weak_from_this())
template<typename U >
auto	weak_from_this_ (std::enable_shared_from_this< U > const *base_ptr) const noexcept-> decltype(base_ptr->weak_from_this())
template<typename U >
std::weak_ptr< U >	weak_from_this_ (...) noexcept
template<typename U >
std::weak_ptr< U const >	weak_from_this_ (...) const noexcept

Detailed Description

template<typename T>
class folly::enable_shared_from_this< T >

Definition at line 55 of file EnableSharedFromThis.h.

Constructor & Destructor Documentation

template<typename T >

constexpr folly::enable_shared_from_this< T >::enable_shared_from_this ( )

defaultnoexcept

Examples:

/facebook/proxygen/proxygen/folly/folly/memory/EnableSharedFromThis.h.

Member Function Documentation

template<typename T >

std::weak_ptr<T> folly::enable_shared_from_this< T >::weak_from_this ( )

inlinenoexcept

Examples:

/facebook/proxygen/proxygen/folly/folly/memory/EnableSharedFromThis.h.

Definition at line 59 of file EnableSharedFromThis.h.

                                           {
    return weak_from_this_<T>(this);
  }

template<typename T >

std::weak_ptr<T const> folly::enable_shared_from_this< T >::weak_from_this ( ) const

inlinenoexcept

Definition at line 63 of file EnableSharedFromThis.h.

                                                       {
    return weak_from_this_<T>(this);
  }

template<typename T >

template<typename U >

auto folly::enable_shared_from_this< T >::weak_from_this_ ( std::enable_shared_from_this< U > *  base_ptr ) -> decltype(base_ptr->weak_from_this())

inlineprivatenoexcept

Examples:

/facebook/proxygen/proxygen/folly/folly/memory/EnableSharedFromThis.h.

Definition at line 72 of file EnableSharedFromThis.h.

                                              {
    return base_ptr->weak_from_this();
  }

template<typename T >

template<typename U >

auto folly::enable_shared_from_this< T >::weak_from_this_ ( std::enable_shared_from_this< U > const *  base_ptr ) const -> decltype(base_ptr->weak_from_this())

inlineprivatenoexcept

Definition at line 78 of file EnableSharedFromThis.h.

                                                       {
    return base_ptr->weak_from_this();
  }

template<typename T >

template<typename U >

std::weak_ptr<U> folly::enable_shared_from_this< T >::weak_from_this_ (   ... )

inlineprivatenoexcept

Definition at line 84 of file EnableSharedFromThis.h.

                                               {
    try {
      return this->shared_from_this();
    } catch (std::bad_weak_ptr const&) {
      // C++17 requires that weak_from_this() on an object not owned by a
      // shared_ptr returns an empty weak_ptr. Sadly, in C++14,
      // shared_from_this() on such an object is undefined behavior, and there
      // is nothing we can do to detect and handle the situation in a portable
      // manner. But in case a compiler is nice enough to implement C++17
      // semantics of shared_from_this() and throws a bad_weak_ptr, we catch it
      // and return an empty weak_ptr.
      return std::weak_ptr<U>{};
    }
  }

template<typename T >

template<typename U >

std::weak_ptr<U const> folly::enable_shared_from_this< T >::weak_from_this_ (   ... ) const

inlineprivatenoexcept

Definition at line 100 of file EnableSharedFromThis.h.

                                                           {
    try {
      return this->shared_from_this();
    } catch (std::bad_weak_ptr const&) {
      return std::weak_ptr<U const>{};
    }
  }

---

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

• proxygen/folly/folly/memory/EnableSharedFromThis.h