cloe::MetaInformation Class Reference

#include <data_broker.hpp>

Classes
struct	Tag

Public Member Functions
template<typename T >
void	remove ()
template<typename T >
void	add_any (std::any metainformation_any)
template<typename T >
const std::any *	get_any () const
template<typename T >
std::enable_if_t<!std::is_void_v< typename T::tag_type >, const typename T::tag_type > *	get () const
template<typename T >
std::enable_if_t< std::is_void_v< typename T::tag_type >, bool >	get () const
template<typename T >
std::enable_if_t< !std::is_void_v< typename T::tag_type > &&!std::is_base_of_v< Tag< T >, T > &&std::is_move_constructible_v< typename T::tag_type > >	add (typename T::tag_type metainformation)
template<typename T >
std::enable_if_t< !std::is_void_v< typename T::tag_type > &&!std::is_base_of_v< Tag< T >, T > &&std::is_copy_constructible_v< typename T::tag_type > &&!std::is_move_constructible_v< typename T::tag_type > >	add (const typename T::tag_type &metainformation)
template<typename T >
std::enable_if_t< std::is_void_v< typename T::tag_type > >	add ()
template<typename T >
std::enable_if_t< std::is_base_of_v< Tag< T >, T > &&std::is_same_v< T, typename T::tag_type > >	add (T metainformation)
template<typename T , typename... TArgs>
std::enable_if_t< std::is_base_of_v< Tag< T >, T > &&std::is_same_v< T, typename T::tag_type > >	add (TArgs... args)

Detailed Description

MetaInformation collects abstract metainformation

Note

: Design-Goals:

• Design-#1: Key-Value (cardinality: 0-1:1). The key defines the value-type.
• Design-#2: Type-erasing techniques shall not eradicate type-safety nor put additional validation steps onto the users.

: Implementation-Notes:

• Implementation-#1: Implementations like "all-is-byte-arrays" or "JSON" were considered and disregarded. E.g. JSON is a serialization format. Using JSON-Schema Design-#2 would be covered. This would imply a) a dependency on multiple levels & b) significant runtime efforts. Shooting sparrows with canons. Pure C++ can do the job in <50 LOC + some for porcellain.

Member Function Documentation

add() [1/5]

template<typename T >

std::enable_if_t< std::is_void_v<typename T::tag_type> > cloe::MetaInformation::add ( )

inline

Adds a metainformation

Template Parameters

T	Type of the metainformation-tag

Note

This overload is enabled only when the effective tag_type is void

add() [2/5]

template<typename T >

std::enable_if_t< !std::is_void_v<typename T::tag_type> && !std::is_base_of_v< Tag< T >, T > && std::is_copy_constructible_v<typename T::tag_type> && !std::is_move_constructible_v<typename T::tag_type> > cloe::MetaInformation::add ( const typename T::tag_type &  metainformation )

inline

Adds a metainformation

Template Parameters

T	Type of the metainformation-tag

Parameters

metainformation

Actual metainformation to be added

Note

This overload is enabled only when the effective tag_type is copy constructible

add() [3/5]

template<typename T >

std::enable_if_t< std::is_base_of_v< Tag< T >, T > && std::is_same_v<T, typename T::tag_type> > cloe::MetaInformation::add ( T  metainformation )

inline

Adds a metainformation

Template Parameters

T	Type of the metainformation-tag

Parameters

metainformation

Actual metainformation to be added

Note

This overload is enabled only when the tag inherits Tag<> and is the effective tag_type

Usage Note:

struct my_tag : cloe::MetaInformation::Tag<my_tag> {
 ...
};
...
my_tag tag;
...
add(std::move(tag));

add() [4/5]

template<typename T , typename... TArgs>

std::enable_if_t< std::is_base_of_v< Tag< T >, T > && std::is_same_v<T, typename T::tag_type> > cloe::MetaInformation::add ( TArgs...  args )

inline

Adds a metainformation constructed from the supplied parameters

Template Parameters

T	Type of the metainformation-tag
TArgs...	Type of the metainformation c'tor arguments

Parameters

args	Arguments for the c'tor of the metainformation

Note

This overload is enabled only when the tag inherits Tag<> and is the effective tag_type

Usage Note:

add<TagType>(arg1, arg2, ...);
 ...
};

add() [5/5]

template<typename T >

std::enable_if_t< !std::is_void_v<typename T::tag_type> && !std::is_base_of_v< Tag< T >, T > && std::is_move_constructible_v<typename T::tag_type> > cloe::MetaInformation::add ( typename T::tag_type  metainformation )

inline

Adds a metainformation

Template Parameters

T	Type of the metainformation-tag

Parameters

metainformation

Actual metainformation to be added

Note

This overload is enabled only when the effective tag_type is move constructible

add_any()

template<typename T >

void cloe::MetaInformation::add_any ( std::any  metainformation_any )

inline

Adds a metainformation

Template Parameters

T	Type of the metainformation-tag

Parameters

metainformation_any

Actual metainformation to be added

get() [1/2]

template<typename T >

std::enable_if_t<!std::is_void_v<typename T::tag_type>, const typename T::tag_type>* cloe::MetaInformation::get ( ) const

inline

Returns a metainformation

Template Parameters

T	Type of the metainformation-tag

Returns

Annotation of type T::tag_type* if the metainformation is present, nullptr otherwise

get() [2/2]

template<typename T >

std::enable_if_t<std::is_void_v<typename T::tag_type>, bool> cloe::MetaInformation::get ( ) const

inline

Returns a metainformation

Template Parameters

T	Type of the metainformation-tag

Returns

true if the metainformation is present, false otherwise

get_any()

template<typename T >

const std::any* cloe::MetaInformation::get_any ( ) const

inline

Returns a metainformation

Template Parameters

T	Type of the metainformation-tag

Returns

std:any* if the metainformation is present, nullptr otherwise

remove()

template<typename T >

void cloe::MetaInformation::remove ( )

inline

Removes an metainformation

Template Parameters

Tag	of the metainformation to be removed

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

• /home/docs/checkouts/readthedocs.org/user_builds/cloe/checkouts/latest/runtime/include/cloe/data_broker.hpp