OpenDDS::XTypes::Optional< T > Class Template Reference

#include <TypeObject.h>

Collaboration diagram for OpenDDS::XTypes::Optional< T >:

Public Member Functions
	Optional ()
	Optional (const T &v)
	~Optional ()
	Optional (const Optional &rhs)
Optional &	operator= (const Optional &rhs)
bool	operator== (const Optional &other) const
bool	operator!= (const Optional &other) const
	operator bool () const
bool	has_value () const
T &	value ()
const T &	value () const

Private Attributes
bool	present_
union {
ACE_CDR::LongDouble   max_alignment
unsigned char   value_ [sizeof(T)]
};

Detailed Description

template<typename T>
class OpenDDS::XTypes::Optional< T >

Definition at line 67 of file TypeObject.h.

Constructor & Destructor Documentation

Optional() [1/3]

template<typename T>

OpenDDS::XTypes::Optional< T >::Optional ( )

inline

Definition at line 69 of file TypeObject.h.

      : present_(false)
      , value_()
    {}

Optional() [2/3]

template<typename T>

OpenDDS::XTypes::Optional< T >::Optional ( const T &  v )

inline

Definition at line 74 of file TypeObject.h.

      : present_(true)
    {
      new(value_) T(v);
    }

~Optional()

template<typename T>

OpenDDS::XTypes::Optional< T >::~Optional ( )

inline

Definition at line 80 of file TypeObject.h.

                {
      if (present_) {
        value().~T();
      }
    }

Optional() [3/3]

template<typename T>

OpenDDS::XTypes::Optional< T >::Optional ( const Optional< T > &  rhs )

inline

Definition at line 86 of file TypeObject.h.

      : present_(false)
      , value_()
    {
      *this = rhs;
    }

Member Function Documentation

has_value()

template<typename T>

bool OpenDDS::XTypes::Optional< T >::has_value ( ) const

inline

Definition at line 129 of file TypeObject.h.

                           {
      return present_;
    }

operator bool()

template<typename T>

OpenDDS::XTypes::Optional< T >::operator bool ( ) const

inline

Definition at line 125 of file TypeObject.h.

                          {
      return present_;
    }

operator!=()

template<typename T>

bool OpenDDS::XTypes::Optional< T >::operator!= ( const Optional< T > &  other ) const

inline

Definition at line 120 of file TypeObject.h.

    {
      return !(*this == other);
    }

operator=()

template<typename T>

Optional& OpenDDS::XTypes::Optional< T >::operator= ( const Optional< T > &  rhs )

inline

Definition at line 93 of file TypeObject.h.

                                             {
      if (this != &rhs) {
        if (present_) {
          if (rhs.present_) {
            value() = rhs.value();
          } else {
            value().~T();
          }
        } else {
          if (rhs.present_) {
            new(value_) T(rhs.value());
          }
        }
        present_ = rhs.present_;
      }
      return *this;
    }

operator==()

template<typename T>

bool OpenDDS::XTypes::Optional< T >::operator== ( const Optional< T > &  other ) const

inline

Definition at line 111 of file TypeObject.h.

    {
      if (present_) {
        return present_ == other.present_ && value() == other.value();
      }

      return present_ == other.present_;
    }

value() [1/2]

template<typename T>

T& OpenDDS::XTypes::Optional< T >::value ( void  )

inline

Definition at line 133 of file TypeObject.h.

Referenced by OpenDDS::XTypes::has_type_object(), OpenDDS::XTypes::Optional< OpenDDS::XTypes::AppliedBuiltinMemberAnnotations >::operator=(), OpenDDS::XTypes::Optional< OpenDDS::XTypes::AppliedBuiltinMemberAnnotations >::operator==(), OpenDDS::DCPS::serialized_size(), and typeobject_generator::set_builtin_member_annotations().

               {
      return reinterpret_cast<T&>(value_);
    }

value() [2/2]

template<typename T>

const T& OpenDDS::XTypes::Optional< T >::value ( void  ) const

inline

Definition at line 137 of file TypeObject.h.

                           {
      return reinterpret_cast<const T&>(value_);
    }

Member Data Documentation

@23

union { ... }

max_alignment

template<typename T>

ACE_CDR::LongDouble OpenDDS::XTypes::Optional< T >::max_alignment

Definition at line 144 of file TypeObject.h.

present_

template<typename T>

bool OpenDDS::XTypes::Optional< T >::present_

private

Definition at line 142 of file TypeObject.h.

Referenced by OpenDDS::XTypes::Optional< OpenDDS::XTypes::AppliedBuiltinMemberAnnotations >::operator=(), and OpenDDS::XTypes::Optional< OpenDDS::XTypes::AppliedBuiltinMemberAnnotations >::operator==().

value_

template<typename T>

unsigned char OpenDDS::XTypes::Optional< T >::value_[sizeof(T)]

Definition at line 145 of file TypeObject.h.

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

• TypeObject.h