cet::maybe_ref< T > Class Template Reference

#include "/cvmfs/nova.opensciencegrid.org/externals/cetlib/v3_06_01/source/cetlib/maybe_ref.h"

Public Types
typedef T	value_type

Public Member Functions
	maybe_ref ()
	maybe_ref (T &t)
bool	isValid () const
	operator bool () const
void	reseat ()
void	reseat (T &p)
T &	ref ()
T const &	ref () const
void	swap (maybe_ref &other)

Private Member Functions
T &	ref_iff_valid () const

Private Attributes
T *	ptr_

Detailed Description

template<class T>
class cet::maybe_ref< T >

Definition at line 35 of file maybe_ref.h.

Member Typedef Documentation

template<class T>

typedef T cet::maybe_ref< T >::value_type

Definition at line 52 of file maybe_ref.h.

Constructor & Destructor Documentation

template<class T>

cet::maybe_ref< T >::maybe_ref ( )

inline

Definition at line 54 of file maybe_ref.h.

: ptr_(0) {}

template<class T>

cet::maybe_ref< T >::maybe_ref ( T &  t )

inlineexplicit

Definition at line 55 of file maybe_ref.h.

: ptr_(&t) {}

Member Function Documentation

template<class T>

bool cet::maybe_ref< T >::isValid ( ) const

inline

Definition at line 60 of file maybe_ref.h.

References cet::maybe_ref< T >::ptr_.

Referenced by cet::maybe_ref< T >::operator bool(), and cet::maybe_ref< T >::ref_iff_valid().

  {
    return ptr_;
  }

template<class T>

cet::maybe_ref< T >::operator bool ( ) const

inlineexplicit

Definition at line 64 of file maybe_ref.h.

References cet::maybe_ref< T >::isValid().

{ return isValid(); }

template<class T>

T& cet::maybe_ref< T >::ref ( )

inline

Definition at line 78 of file maybe_ref.h.

References cet::maybe_ref< T >::ref_iff_valid(), and T.

Referenced by cet::operator==().

  {
    return ref_iff_valid();
  }

template<class T>

T const& cet::maybe_ref< T >::ref ( ) const

inline

Definition at line 83 of file maybe_ref.h.

References cet::maybe_ref< T >::ref_iff_valid().

  {
    return ref_iff_valid();
  }

template<class T>

T& cet::maybe_ref< T >::ref_iff_valid ( ) const

inlineprivate

Definition at line 98 of file maybe_ref.h.

References cet::maybe_ref< T >::isValid(), and cet::maybe_ref< T >::ptr_.

Referenced by cet::maybe_ref< T >::ref().

  {
    if (isValid())
      return *ptr_;

    // TODO: consider throwing a cet::exception
    throw std::logic_error("cet::maybe_ref<>: referent does not exist");
  }

template<class T>

void cet::maybe_ref< T >::reseat ( )

inline

Definition at line 67 of file maybe_ref.h.

References cet::maybe_ref< T >::ptr_.

  {
    ptr_ = 0;
  }

template<class T>

void cet::maybe_ref< T >::reseat ( T &  p )

inline

Definition at line 72 of file maybe_ref.h.

References cet::maybe_ref< T >::ptr_, and T.

  {
    ptr_ = &p;
  }

template<class T>

void cet::maybe_ref< T >::swap ( maybe_ref< T > &  other )

inline

Definition at line 89 of file maybe_ref.h.

References cet::maybe_ref< T >::ptr_, and std::swap().

Referenced by cet::swap().

  {
    std::swap(ptr_, other.ptr_);
  }

Member Data Documentation

template<class T>

T* cet::maybe_ref< T >::ptr_

private

Definition at line 95 of file maybe_ref.h.

Referenced by cet::maybe_ref< T >::isValid(), cet::maybe_ref< T >::ref_iff_valid(), cet::maybe_ref< T >::reseat(), and cet::maybe_ref< T >::swap().

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

• cetlib/maybe_ref.h