anch::Optional< T > Class Template Reference

std::optional usefull methods. More...

#include <optional.hpp>

Inheritance diagram for anch::Optional< T >:

Collaboration diagram for anch::Optional< T >:

Public Member Functions
constexpr	Optional () noexcept
constexpr	Optional (std::nullopt_t null) noexcept
constexpr	Optional (const std::optional< T > &other)
constexpr	Optional (std::optional< T > &&other) noexcept
template<typename U>
	Optional (const std::optional< U > &other)
template<typename U>
	Optional (std::optional< U > &&other)
template<typename... Args>
constexpr	Optional (std::in_place_t inplace, Args &&... args)
template<typename U, typename... Args>
constexpr	Optional (std::in_place_t inplace, std::initializer_list< U > ilist, Args &&... args)
template<typename U = T>
constexpr	Optional (U &&value)
virtual	~Optional ()
void	ifValue (std::function< void(const T &)> func)
void	ifValueOrElse (std::function< void(const T &)> func, std::function< void()> fallback)
template<typename U>
Optional< U >	map (std::function< U(const T &)> mapper) const

Detailed Description

template<typename T>
class anch::Optional< T >

std::optional usefull methods.

Provides some missing (from my point of view) features to std::optional .

Since

0.1

Author

Vincent Lachenal

Constructor & Destructor Documentation

Optional() [1/9]

template<typename T>

anch::Optional< T >::Optional ( )

constexprnoexcept

Optional default constructor

Optional() [2/9]

template<typename T>

anch::Optional< T >::Optional ( std::nullopt_t null )

constexprnoexcept

Optional constructor

Parameters

null	the NULL value

Optional() [3/9]

template<typename T>

anch::Optional< T >::Optional ( const std::optional< T > & other )

constexpr

Optional 'copy' construtor

Parameters

other

the std::optional to copy

Optional() [4/9]

template<typename T>

anch::Optional< T >::Optional ( std::optional< T > && other )

constexprnoexcept

Optional 'move' constructor

Parameters

other

the std::optional to move

Optional() [5/9]

template<typename T>

template<typename U>

anch::Optional< T >::Optional

(

const std::optional< U > &

other

)

Optional converting 'copy' construtor

Parameters

other

the std::optional to copy

Optional() [6/9]

template<typename T>

template<typename U>

anch::Optional< T >::Optional

(

std::optional< U > &&

other

)

Optional converting 'move' constructor

Parameters

other

the std::optional to move

Optional() [7/9]

template<typename T>

template<typename... Args>

anch::Optional< T >::Optional ( std::in_place_t inplace, Args &&... args )

explicitconstexpr

Optional constructor.
This constructor will initialize containing object with args.

Parameters

inplace	parameters to force T construction
args	the T type constructor arguments

Optional() [8/9]

template<typename T>

template<typename U, typename... Args>

anch::Optional< T >::Optional ( std::in_place_t inplace, std::initializer_list< U > ilist, Args &&... args )

explicitconstexpr

Optional constructor.
This constructor will initialize containing object with args.

Parameters

inplace	parameters to force T construction
ilist	the std::list initializer
args	the T type constructor arguments

Optional() [9/9]

template<typename T>

template<typename U>

anch::Optional< T >::Optional ( U && value )

constexpr

Optional constructor.

Parameters

value

the value to convert

~Optional()

template<typename T>

anch::Optional< T >::~Optional ( )

virtual

Optional destructor

Member Function Documentation

ifValue()

template<typename T>

void anch::Optional< T >::ifValue ( std::function< void(const T &)> func )

inline

Apply treatment if optional has value

Parameters

func	the treatment to apply when optional has value

ifValueOrElse()

template<typename T>

void anch::Optional< T >::ifValueOrElse ( std::function< void(const T &)> func, std::function< void()> fallback )

inline

Apply treatment if optional has value or apply fallback treatment

Parameters

func	the treatment to apply when optional has value
fallback	the treatment to apply when optional has no value

map()

template<typename T>

template<typename U>

Optional< U > anch::Optional< T >::map ( std::function< U(const T &)> mapper ) const

inline

Transform optional type to another.
It value is not set, return an empty optional.

Parameters

mapper

the mapping function

Returns

the new optional

Here is the call graph for this function:

---

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

• anch-utils/inc/optional.hpp