Optional< T > Class Template Reference

#include <genesis/utils/containers/optional.hpp>

Detailed Description

template<typename T>
class genesis::utils::Optional< T >

Simplistic optional: requires T to be default constructible, copyable.

The implementation is based on https://github.com/martinmoene/optional-bare, which is published under the Boost Software License - Version 1.0, see our Acknowledgements for further details.

Definition at line 178 of file optional.hpp.

Public Member Functions
	Optional ()
	Optional (nullopt_t)
template<class U >
	Optional (Optional< U > &&other)
template<class U >
	Optional (Optional< U > const &other)
	Optional (T &&arg)
	Optional (T const &arg)
bool	has_value () const
	operator bool () const
value_type &	operator* ()
const value_type &	operator* () const
value_type *	operator-> ()
const value_type *	operator-> () const
Optional &	operator= (nullopt_t)
template<class U >
Optional &	operator= (Optional< U > &&other)
template<class U >
Optional &	operator= (Optional< U > const &other)
Optional &	operator= (T &&other)
Optional &	operator= (T const &other)
void	reset ()
void	swap (Optional &rhs)
value_type &	value ()
const value_type &	value () const
template<class U >
value_type	value_or (U const &v) const

Public Types
typedef T	value_type

Constructor & Destructor Documentation

Optional() [1/6]

Optional ( )

inline

Definition at line 192 of file optional.hpp.

Optional() [2/6]

Optional ( nullopt_t  )

inline

Definition at line 196 of file optional.hpp.

Optional() [3/6]

Optional ( T const &  arg )

inline

Definition at line 200 of file optional.hpp.

Optional() [4/6]

Optional ( T &&  arg )

inline

Definition at line 205 of file optional.hpp.

Optional() [5/6]

Optional ( Optional< U > const &  other )

inline

Definition at line 211 of file optional.hpp.

Optional() [6/6]

Optional ( Optional< U > &&  other )

inline

Definition at line 220 of file optional.hpp.

Member Function Documentation

has_value()

bool has_value ( ) const

inline

Definition at line 310 of file optional.hpp.

operator bool()

operator bool ( ) const

inlineexplicit

Definition at line 305 of file optional.hpp.

operator*() [1/2]

value_type& operator* ( )

inline

Definition at line 299 of file optional.hpp.

operator*() [2/2]

const value_type& operator* ( ) const

inline

Definition at line 293 of file optional.hpp.

operator->() [1/2]

value_type* operator-> ( )

inline

Definition at line 287 of file optional.hpp.

operator->() [2/2]

const value_type* operator-> ( ) const

inline

Definition at line 281 of file optional.hpp.

operator=() [1/5]

Optional& operator= ( nullopt_t  )

inline

Definition at line 228 of file optional.hpp.

operator=() [2/5]

Optional& operator= ( Optional< U > &&  other )

inline

Definition at line 259 of file optional.hpp.

operator=() [3/5]

Optional& operator= ( Optional< U > const &  other )

inline

Definition at line 249 of file optional.hpp.

operator=() [4/5]

Optional& operator= ( T &&  other )

inline

Definition at line 241 of file optional.hpp.

operator=() [5/5]

Optional& operator= ( T const &  other )

inline

Definition at line 234 of file optional.hpp.

reset()

void reset ( )

inline

Definition at line 343 of file optional.hpp.

swap()

void swap ( Optional< T > &  rhs )

inline

Definition at line 268 of file optional.hpp.

value() [1/2]

value_type& value ( )

inline

Definition at line 324 of file optional.hpp.

value() [2/2]

const value_type& value ( ) const

inline

Definition at line 315 of file optional.hpp.

value_or()

value_type value_or ( U const &  v ) const

inline

Definition at line 334 of file optional.hpp.

Member Typedef Documentation

value_type

typedef T value_type

Definition at line 186 of file optional.hpp.

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

• optional.hpp