A C++17 compatible optional implementation. More...

#include <optional.hpp>

Public Types
using	type = T
	Typdef for `T`.

Public Member Functions
	optional (const none_t &=none)
	Creates an instance without value.

template<class U , class E = typename std::enable_if< std::is_convertible<U, T>::value >::type>
	optional (U x)
	Creates an valid instance from `value`.

	optional (const optional &other)

	optional (optional &&other) noexcept(std::is_nothrow_move_constructible< T >::value)

optional &	operator= (const optional &other)

optional &	operator= (optional &&other) noexcept(std::is_nothrow_destructible< T >::value &&std::is_nothrow_move_assignable< T >::value)

	operator bool () const
	Checks whether this object contains a value.

bool	operator! () const
	Checks whether this object does not contain a value.

T &	operator* ()
	Returns the value.

const T &	operator* () const
	Returns the value.

const T *	operator-> () const
	Returns the value.

T *	operator-> ()
	Returns the value.

T &	value ()
	Returns the value.

const T &	value () const
	Returns the value.

const T &	value_or (const T &default_value) const
	Returns the value if `m_valid`, otherwise returns `default_value`.

Related Functions
(Note that these are not member functions.)
template<class T >
std::string	to_string (const optional< T > &x)

template<class T >
T &&	move_if_optional (optional< T > &x)
	Returns an rvalue to the value managed by `x`.

template<class T >
T &	move_if_optional (T *x)
	Returns `*x`.

template<class T >
bool	operator== (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator!= (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator< (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator<= (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator>= (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator> (const optional< T > &lhs, const optional< T > &rhs)

template<class T >
bool	operator== (const optional< T > &lhs, none_t)

template<class T >
bool	operator== (none_t, const optional< T > &rhs)

template<class T >
bool	operator!= (const optional< T > &lhs, none_t)

template<class T >
bool	operator!= (none_t, const optional< T > &rhs)

template<class T >
bool	operator< (const optional< T > &, none_t)

template<class T >
bool	operator< (none_t, const optional< T > &rhs)

template<class T >
bool	operator<= (const optional< T > &lhs, none_t)

template<class T >
bool	operator<= (none_t, const optional< T > &)

template<class T >
bool	operator> (const optional< T > &lhs, none_t)

template<class T >
bool	operator> (none_t, const optional< T > &)

template<class T >
bool	operator>= (const optional< T > &, none_t)

template<class T >
bool	operator>= (none_t, const optional< T > &)

template<class T >
bool	operator== (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator== (const T &lhs, const optional< T > &rhs)

template<class T >
bool	operator!= (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator!= (const T &lhs, const optional< T > &rhs)

template<class T >
bool	operator< (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator< (const T &lhs, const optional< T > &rhs)

template<class T >
bool	operator<= (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator<= (const T &lhs, const optional< T > &rhs)

template<class T >
bool	operator> (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator> (const T &lhs, const optional< T > &rhs)

template<class T >
bool	operator>= (const optional< T > &lhs, const T &rhs)

template<class T >
bool	operator>= (const T &lhs, const optional< T > &rhs)

Detailed Description

template<class T>
class caf::optional< T >

A C++17 compatible optional implementation.

Friends And Related Function Documentation

◆ operator!=() [1/5]

template<class T >

bool operator!=	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator!=	(	const optional< T > &	lhs,
		none_t
	)

template<class T >

bool operator!=	(	none_t	,
		const optional< T > &	rhs
	)

template<class T >

bool operator!=	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator!=	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator<	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator<	(	const optional< T > &	,
		none_t
	)

template<class T >

bool operator<	(	none_t	,
		const optional< T > &	rhs
	)

template<class T >

bool operator<	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator<	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator<=	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator<=	(	const optional< T > &	lhs,
		none_t
	)

template<class T >

bool operator<=	(	none_t	,
		const optional< T > &
	)

template<class T >

bool operator<=	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator<=	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator==	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator==	(	const optional< T > &	lhs,
		none_t
	)

template<class T >

bool operator==	(	none_t	,
		const optional< T > &	rhs
	)

template<class T >

bool operator==	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator==	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator>	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator>	(	const optional< T > &	lhs,
		none_t
	)

template<class T >

bool operator>	(	none_t	,
		const optional< T > &
	)

template<class T >

bool operator>	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator>	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator>=	(	const optional< T > &	lhs,
		const optional< T > &	rhs
	)

template<class T >

bool operator>=	(	const optional< T > &	,
		none_t
	)

template<class T >

bool operator>=	(	none_t	,
		const optional< T > &
	)

template<class T >

bool operator>=	(	const optional< T > &	lhs,
		const T &	rhs
	)

template<class T >

bool operator>=	(	const T &	lhs,
		const optional< T > &	rhs
	)

template<class T >

std::string to_string ( const optional< T > & x )

/build/actor-framework-0.17.6/libcaf_core/caf/fwd.hpp
/build/actor-framework-0.17.6/libcaf_core/caf/optional.hpp

Public Types

Public Member Functions

Related Functions

Detailed Description

template<class T>
class caf::optional< T >

Friends And Related Function Documentation

◆ operator!=() [1/5]

◆ operator!=() [2/5]

◆ operator!=() [3/5]

◆ operator!=() [4/5]

◆ operator!=() [5/5]

◆ operator<() [1/5]

◆ operator<() [2/5]

◆ operator<() [3/5]

◆ operator<() [4/5]

◆ operator<() [5/5]

◆ operator<=() [1/5]

◆ operator<=() [2/5]

◆ operator<=() [3/5]

◆ operator<=() [4/5]

◆ operator<=() [5/5]

◆ operator==() [1/5]

◆ operator==() [2/5]

◆ operator==() [3/5]

◆ operator==() [4/5]

◆ operator==() [5/5]

◆ operator>() [1/5]

◆ operator>() [2/5]

◆ operator>() [3/5]

◆ operator>() [4/5]

◆ operator>() [5/5]

◆ operator>=() [1/5]

◆ operator>=() [2/5]

◆ operator>=() [3/5]

◆ operator>=() [4/5]

◆ operator>=() [5/5]

◆ to_string()

Public Types

Public Member Functions

Related Functions

Detailed Description

template<class T> class caf::optional< T >

Friends And Related Function Documentation

◆ operator!=() [1/5]

◆ operator!=() [2/5]

◆ operator!=() [3/5]

◆ operator!=() [4/5]

◆ operator!=() [5/5]

◆ operator<() [1/5]

◆ operator<() [2/5]

◆ operator<() [3/5]

◆ operator<() [4/5]

◆ operator<() [5/5]

◆ operator<=() [1/5]

◆ operator<=() [2/5]

◆ operator<=() [3/5]

◆ operator<=() [4/5]

◆ operator<=() [5/5]

◆ operator==() [1/5]

◆ operator==() [2/5]

◆ operator==() [3/5]

◆ operator==() [4/5]

◆ operator==() [5/5]

◆ operator>() [1/5]

◆ operator>() [2/5]

◆ operator>() [3/5]

◆ operator>() [4/5]

◆ operator>() [5/5]

◆ operator>=() [1/5]

◆ operator>=() [2/5]

◆ operator>=() [3/5]

◆ operator>=() [4/5]

◆ operator>=() [5/5]

◆ to_string()

template<class T>
class caf::optional< T >