Meta data object. More...

#include <meta.hpp>

Public Member Functions
	data () noexcept
	Default constructor.

meta::type	parent () const noexcept
	Returns the meta type to which a meta data belongs. More...

bool	is_const () const noexcept
	Indicates whether a given meta data is constant or not. More...

bool	is_static () const noexcept
	Indicates whether a given meta data is static or not. More...

meta::type	type () const noexcept
	Returns the meta type of a given meta data. More...

template<typename Type >
bool	set (handle handle, Type &&value) const
	Sets the value of the variable enclosed by a given meta type. More...

template<typename Type >
bool	set (handle handle, std::size_t index, Type &&value) const
	Sets the i-th element of an array enclosed by a given meta type. More...

any	get (handle handle) const noexcept
	Gets the value of the variable enclosed by a given meta type. More...

any	get (handle handle, std::size_t index) const noexcept
	Gets the i-th element of an array enclosed by a given meta type. More...

template<typename Op >
std::enable_if_t< std::is_invocable_v< Op, meta::prop >, void >	prop (Op op) const noexcept
	Iterates all the properties assigned to a meta data. More...

template<typename Key >
std::enable_if_t<!std::is_invocable_v< Key, meta::prop >, meta::prop >	prop (Key &&key) const noexcept
	Returns the property associated with a given key. More...

	operator bool () const noexcept
	Returns true if a meta object is valid, false otherwise. More...

bool	operator== (const data &other) const noexcept
	Checks if two meta objects refer to the same node. More...

Friends
template<typename >
class	factory
	A meta factory is allowed to create meta objects.

Detailed Description

Meta data object.

A meta data is an opaque container for a data member associated with a given type.

Definition at line 1180 of file meta.hpp.

Member Function Documentation

◆ get() [1/2]

any meta::data::get ( handle handle ) const

inlinenoexcept

Gets the value of the variable enclosed by a given meta type.

It must be possible to cast the instance to the parent type of the meta data. Otherwise, invoking the getter results in an undefined behavior.

Parameters

handle An opaque pointer to an instance of the underlying type.

Returns: A meta any containing the value of the underlying variable.

Definition at line 1275 of file meta.hpp.

◆ get() [2/2]

any meta::data::get	(	handle	handle,
		std::size_t	index
	)		const

inlinenoexcept

Gets the i-th element of an array enclosed by a given meta type.

It must be possible to cast the instance to the parent type of the meta data. Otherwise, invoking the getter results in an undefined behavior.

Parameters

handle	An opaque pointer to an instance of the underlying type.
index	Position of the underlying element to get.

Returns: A meta any containing the value of the underlying element.

Definition at line 1289 of file meta.hpp.

◆ is_const()

bool meta::data::is_const ( ) const

inlinenoexcept

Indicates whether a given meta data is constant or not.

Returns: True if the meta data is constant, false otherwise.

Definition at line 1204 of file meta.hpp.

◆ is_static()

bool meta::data::is_static ( ) const

inlinenoexcept

Indicates whether a given meta data is static or not.

A static meta data is such that it can be accessed using a null pointer as an instance.

Returns: True if the meta data is static, false otherwise.

Definition at line 1216 of file meta.hpp.

◆ operator bool()

meta::data::operator bool ( ) const

inlineexplicitnoexcept

Returns true if a meta object is valid, false otherwise.

Returns: True if the meta object is valid, false otherwise.

Definition at line 1327 of file meta.hpp.

◆ operator==()

bool meta::data::operator== ( const data & other ) const

inlinenoexcept

Checks if two meta objects refer to the same node.

Parameters

other The meta object with which to compare.

Returns: True if the two meta objects refer to the same node, false otherwise.

Definition at line 1337 of file meta.hpp.

◆ parent()

meta::type meta::data::parent ( ) const

inlinenoexcept

Returns the meta type to which a meta data belongs.

Returns: The meta type to which the meta data belongs.

Definition at line 1995 of file meta.hpp.

◆ prop() [1/2]

template<typename Op >

std::enable_if_t<std::is_invocable_v<Op, meta::prop>, void> meta::data::prop ( Op op ) const

inlinenoexcept

Iterates all the properties assigned to a meta data.

Template Parameters

Op	Type of the function object to invoke.

Parameters

op	A valid function object.

Definition at line 1301 of file meta.hpp.

◆ prop() [2/2]

template<typename Key >

std::enable_if_t<!std::is_invocable_v<Key, meta::prop>, meta::prop> meta::data::prop ( Key && key ) const

inlinenoexcept

Returns the property associated with a given key.

Template Parameters

Key	Type of key to use to search for a property.

Parameters

key	The key to use to search for a property.

Returns: The property associated with the given key, if any.

Definition at line 1315 of file meta.hpp.

◆ set() [1/2]

template<typename Type >

bool meta::data::set	(	handle	handle,
		Type &&	value
	)		const

inline

Sets the value of the variable enclosed by a given meta type.

It must be possible to cast the instance to the parent type of the meta data. Otherwise, invoking the setter results in an undefined behavior.
The type of the value must coincide exactly with that of the variable enclosed by the meta data. Otherwise, invoking the setter does nothing.

Template Parameters

Type	Type of value to assign.

Parameters

handle	An opaque pointer to an instance of the underlying type.
value	Parameter to use to set the underlying variable.

Returns: True in case of success, false otherwise.

Definition at line 1241 of file meta.hpp.

◆ set() [2/2]

template<typename Type >

bool meta::data::set	(	handle	handle,
		std::size_t	index,
		Type &&	value
	)		const

inline

Sets the i-th element of an array enclosed by a given meta type.

It must be possible to cast the instance to the parent type of the meta data. Otherwise, invoking the setter results in an undefined behavior.
The type of the value must coincide exactly with that of the array type enclosed by the meta data. Otherwise, invoking the setter does nothing.

Template Parameters

Type	Type of value to assign.

Parameters

handle	An opaque pointer to an instance of the underlying type.
index	Position of the underlying element to set.
value	Parameter to use to set the underlying element.

Returns: True in case of success, false otherwise.

Definition at line 1261 of file meta.hpp.

◆ type()

meta::type meta::data::type ( ) const

inlinenoexcept

Returns the meta type of a given meta data.

Returns: The meta type of the meta data.

Definition at line 2000 of file meta.hpp.

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

src/meta/meta.hpp

Public Member Functions

Friends

Detailed Description

Member Function Documentation

◆ get() [1/2]

◆ get() [2/2]

◆ is_const()

◆ is_static()

◆ operator bool()

◆ operator==()

◆ parent()

◆ prop() [1/2]

◆ prop() [2/2]

◆ set() [1/2]

◆ set() [2/2]

◆ type()