Record< VAL > Class Template Reference

#include "lib/diff/record.hpp"

Description

template<typename VAL>
class lib::diff::Record< VAL >

object-like record of data.

For symbolic representation of "objects". A Record holds both attributes (key-value data) plus a list of enclosed children, which are conceived to be within the "scope" of this Record. Optionally, a typeID (metadata) may be defined. Otherwise, this typeID defaults to "NIL". The representation of attributes depends on the actual value type, which somehow need the ability to encode the keys within the value data. By default, a specialisation is given for string, using the "key = val" syntax. Yet the most relevant use case is Record<GenNode> – using the embedded name-ID of the GenNode elements as key for attributes.

Record elements are meant to be immutable; they can be created from a defining collection. However, we provide a #Mutator mechanism to allow for rebuilding and mutating symbolic data structures based on Records and GenNode. Essentially, Lumiera's diff framework relies on this.

Definition at line 150 of file record.hpp.

Public Types
using	iterator = IterAdapter< ElmIter, const Record * >
using	keyIter = TransformIter< scopeIter, string >
using	scopeIter = typename iter_stl::_SeqT< const Storage >::Range
using	valIter = TransformIter< scopeIter, Access >

Public Member Functions
template<typename A , typename C >
	Record (Symbol typeID, A &&att, C &&chi)
template<typename A , typename C >
	Record (Symbol typeID, std::initializer_list< A > const &&att, std::initializer_list< C > const &&chi)
template<typename SEQ >
	Record (SEQ const &con)
	Record (std::initializer_list< VAL > const &&ili)
	Record (Mutator const &mut)
	copy-initialise (or convert) from the given Mutator instance. More...
	Record (Mutator &&mut)
scopeIter	attribs () const
size_t	attribSize () const
iterator	begin () const
	default iteration exposes all data within this "object", starting with the attributes
Access	child (size_t idx) const
size_t	childSize () const
bool	contains (VAL const &val) const
bool	empty () const
iterator	end () const
Access	get (string key) const
string	getType () const
bool	hasAttribute (string key) const
keyIter	keys () const
	operator std::string () const
	for diagnostic purpose
scopeIter	scope () const
valIter	vals () const

Static Public Attributes
static const string	TYPE_NIL = string(TYPE_NIL_SYM)
static const Symbol	TYPE_NIL_SYM = "NIL"

Classes
class	Mutator

Friends
bool	checkPoint (const Record *src, ElmIter &pos)
	Implementation of Iteration-logic: detect iteration end. More...
void	iterNext (const Record *, ElmIter &pos)
	Implementation of Iteration-logic: pull next element. More...
class	Mutator
bool	operator!= (Record const &r1, Record const &r2)
bool	operator== (Record const &r1, Record const &r2)

Private Types
using	Access = typename RecordSetup< VAL >::Access
using	ElmIter = typename RecordSetup< VAL >::ElmIter
using	Storage = typename RecordSetup< VAL >::Storage

Private Member Functions
template<>
string	buildAttribute (string const &key, X &&payload)
template<>
string	extractKey (string const &v)
template<>
string	extractTypeID (string const &v)
template<>
string	extractVal (string const &v)
ElmIter	findKey (string key) const
template<>
bool	isAttribute (string const &v)
template<>
bool	isTypeID (string const &v)
template<>
string	renderAttribute (string const &attrib)

Static Private Member Functions
template<typename X >
static VAL	buildAttribute (string const &key, X &&payload)
static string	extractKey (VAL const &v)
static string	extractTypeID (VAL const &v)
static Access	extractVal (VAL const &v)
static bool	isAttribute (VAL const &v)
static bool	isTypeID (VAL const &v)
static string	renderAttribute (VAL const &a)

Private Attributes
Storage	attribs_
Storage	children_
string	type_

Constructor & Destructor Documentation

Record()

Record ( Mutator const &  mut )

inline

copy-initialise (or convert) from the given Mutator instance.

Remarks

need to code this explicitly, otherwise Record's build-from sequence templated ctor would kick in.

Warning

beware of initialiser lists. Record has a dedicated ctor to accept an initialiser list of GenNode elements, and GenNode's ctor is deliberately not explicit, to ease building argument lists wrapped in GenNodes. When writing initialisation expressions inline, the compiler might pick the conversion path through initialiser list, which means the contents of the Mutator end up wrapped into a GenNode, which in turn becomes the only child of the new Record.

Definition at line 298 of file record.hpp.

Friends And Related Function Documentation

iterNext

void iterNext ( const Record< VAL > *  , ElmIter &  pos  )

friend

Implementation of Iteration-logic: pull next element.

Definition at line 331 of file record.hpp.

checkPoint

bool checkPoint ( const Record< VAL > *  src, ElmIter &  pos  )

friend

Implementation of Iteration-logic: detect iteration end.

Remarks

seamless continuation of the iteration when reaching the end of the attribute collection. In this implementation, we use the default constructed ITER() to mark iteration end.

Definition at line 342 of file record.hpp.

Collaboration diagram for Record< VAL >:

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

• record.hpp