Abstract base class for variables with a value which is recalculated when the precision has changed. More...

#include <Variable.h>

Inheritance diagram for DynamicVariable:

Public Member Functions
	DynamicVariable (std::string cat_, std::string name_, std::string title_="", bool is_local=false, bool is_builtin=true, bool is_active=true)

	DynamicVariable (const DynamicVariable *variable)

ExpressionItem *	copy () const =0

void	set (const ExpressionItem *item)

const MathStructure &	get ()

void	set (const MathStructure &o)

void	set (std::string expression_)

int	calculatedPrecision () const

virtual bool	representsPositive (bool=false)

virtual bool	representsNegative (bool=false)

virtual bool	representsNonNegative (bool=false)

virtual bool	representsNonPositive (bool=false)

virtual bool	representsInteger (bool=false)

virtual bool	representsNonInteger (bool=false)

virtual bool	representsNumber (bool=false)

virtual bool	representsRational (bool=false)

virtual bool	representsReal (bool=false)

virtual bool	representsComplex (bool=false)

virtual bool	representsNonZero (bool=false)

virtual bool	representsEven (bool=false)

virtual bool	representsOdd (bool=false)

virtual bool	representsUndefined (bool=false, bool=false, bool=false)

virtual bool	representsBoolean ()

virtual bool	representsNonMatrix ()

virtual bool	representsScalar ()

Public Member Functions inherited from KnownVariable
	KnownVariable (std::string cat_, std::string name_, const MathStructure &o, std::string title_="", bool is_local=true, bool is_builtin=false, bool is_active=true)

	KnownVariable (std::string cat_, std::string name_, std::string expression_, std::string title_="", bool is_local=true, bool is_builtin=false, bool is_active=true)

	KnownVariable ()

	KnownVariable (const KnownVariable *variable)

bool	isKnown () const

virtual bool	isExpression () const

virtual std::string	expression () const

virtual std::string	uncertainty (bool *is_relative=NULL) const

virtual std::string	unit () const

int	subtype () const

virtual void	setUncertainty (std::string standard_uncertainty, bool is_relative=false)

virtual void	setUnit (std::string unit_expression)

virtual bool	representsFraction (bool=false)

virtual bool	representsNonComplex (bool=false)

virtual int	id () const

Public Member Functions inherited from Variable
	Variable (std::string cat_, std::string name_, std::string title_="", bool is_local=true, bool is_builtin=false, bool is_active=true)

	Variable (const Variable *variable)

virtual int	type () const

Public Member Functions inherited from ExpressionItem
	ExpressionItem (std::string cat_, std::string name_, std::string title_="", std::string descr_="", bool is_local=true, bool is_builtin=false, bool is_active=true)

virtual bool	destroy ()

bool	isRegistered () const

void	setRegistered (bool is_registered)
	For internal use.

virtual const std::string &	name (bool use_unicode=false, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual const std::string &	referenceName () const

virtual const ExpressionName &	preferredName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual const ExpressionName &	preferredInputName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual const ExpressionName &	preferredDisplayName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual const ExpressionName &	getName (size_t index) const

virtual void	setName (const ExpressionName &ename, size_t index=1, bool force=true)

virtual void	setName (std::string sname, size_t index, bool force=true)

virtual void	addName (const ExpressionName &ename, size_t index=0, bool force=true)

virtual void	addName (std::string sname, size_t index=0, bool force=true)

virtual size_t	countNames () const

virtual void	clearNames ()

virtual void	clearNonReferenceNames ()

virtual void	removeName (size_t index)

virtual size_t	hasName (const std::string &sname, bool case_sensitive=true) const

virtual size_t	hasNameCaseSensitive (const std::string &sname) const

virtual const ExpressionName &	findName (int abbreviation=-1, int use_unicode=-1, int plural=-1, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual const std::string &	title (bool return_name_if_no_title=true, bool use_unicode=false, bool(can_display_unicode_string_function)(const char , void )=NULL, void can_display_unicode_string_arg=NULL) const

virtual void	setTitle (std::string title_)

virtual const std::string &	description () const

virtual void	setDescription (std::string descr_)

virtual const std::string &	category () const

virtual void	setCategory (std::string cat_)

virtual bool	hasChanged () const

virtual void	setChanged (bool has_changed)

virtual bool	isLocal () const

virtual bool	setLocal (bool is_local=true, int will_be_active=-1)

virtual bool	isBuiltin () const

virtual bool	isApproximate () const

virtual void	setApproximate (bool is_approx=true)

virtual int	precision () const

virtual void	setPrecision (int prec)

virtual bool	isActive () const

virtual void	setActive (bool is_active)

virtual bool	isHidden () const

virtual void	setHidden (bool is_hidden)

virtual int	refcount () const

virtual void	ref ()

virtual void	unref ()

virtual void	ref (ExpressionItem *o)

virtual void	unref (ExpressionItem *o)

virtual ExpressionItem *	getReferencer (size_t index=1) const

virtual bool	changeReference (ExpressionItem o_from, ExpressionItem o_to)

Protected Member Functions
virtual void	calculate (MathStructure &m) const =0

Protected Attributes
bool	always_recalculate

Protected Attributes inherited from KnownVariable
MathStructure *	mstruct

MathStructure *	mstruct_alt

bool	b_expression

int	calculated_precision

std::string	sexpression

std::string	suncertainty

std::string	sunit

bool	b_relative_uncertainty

Protected Attributes inherited from ExpressionItem
std::string	scat

std::string	stitle

std::string	sdescr

bool	b_local

bool	b_changed

bool	b_builtin

bool	b_approx

bool	b_active

bool	b_registered

bool	b_hidden

bool	b_destroyed

int	i_ref

int	i_precision

std::vector< ExpressionItem * >	v_refs

std::vector< ExpressionName >	names

Detailed Description

Abstract base class for variables with a value which is recalculated when the precision has changed.

Member Function Documentation

◆ calculatedPrecision()

int DynamicVariable::calculatedPrecision ( ) const

Returns the precision of the calculated value.

Returns: Precision of the calculated value or zero if the value has not yet been calculated.

◆ copy()

ExpressionItem * DynamicVariable::copy ( ) const

pure virtual

Reimplemented from KnownVariable.

◆ get()

const MathStructure & DynamicVariable::get ( )

virtual

Returns the value of the variable. If no value is set or parsed and an expression is set, the expression is parsed and resulting value returned.

Returns: The value of the variable..

Reimplemented from KnownVariable.

◆ representsBoolean()

virtual bool DynamicVariable::representsBoolean ( )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsComplex()

virtual bool DynamicVariable::representsComplex ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsEven()

virtual bool DynamicVariable::representsEven ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsInteger()

virtual bool DynamicVariable::representsInteger ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNegative()

virtual bool DynamicVariable::representsNegative ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNonInteger()

virtual bool DynamicVariable::representsNonInteger ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNonMatrix()

virtual bool DynamicVariable::representsNonMatrix ( )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNonNegative()

virtual bool DynamicVariable::representsNonNegative ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNonPositive()

virtual bool DynamicVariable::representsNonPositive ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNonZero()

virtual bool DynamicVariable::representsNonZero ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsNumber()

virtual bool DynamicVariable::representsNumber ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsOdd()

virtual bool DynamicVariable::representsOdd ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsPositive()

virtual bool DynamicVariable::representsPositive ( bool = false )

inlinevirtual

Returns if the variable represents a positive value.

Reimplemented from KnownVariable.

Reimplemented in NowVariable, TodayVariable, TomorrowVariable, and YesterdayVariable.

◆ representsRational()

virtual bool DynamicVariable::representsRational ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsReal()

virtual bool DynamicVariable::representsReal ( bool = false )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsScalar()

virtual bool DynamicVariable::representsScalar ( )

inlinevirtual

Reimplemented from KnownVariable.

◆ representsUndefined()

virtual bool DynamicVariable::representsUndefined	(	bool	= false,
		bool	= false,
		bool	= false )

inlinevirtual

Reimplemented from KnownVariable.

◆ set() [1/3]

void DynamicVariable::set ( const ExpressionItem * item )

virtual

Reimplemented from KnownVariable.

◆ set() [2/3]

void DynamicVariable::set ( const MathStructure & o )

virtual

Sets the value of the variable. If expression is set, it is cleared.

Parameters

o Value.

Reimplemented from KnownVariable.

◆ set() [3/3]

void DynamicVariable::set ( std::string expression_ )

virtual

Sets the text string expression of the variable. The value is cleared.

Parameters

expression_ Expression.

Reimplemented from KnownVariable.

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

/home/hanna/Utveckling/libqalculate/libqalculate/Variable.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

◆ calculatedPrecision()

◆ copy()

◆ get()

◆ representsBoolean()

◆ representsComplex()

◆ representsEven()

◆ representsInteger()

◆ representsNegative()

◆ representsNonInteger()

◆ representsNonMatrix()

◆ representsNonNegative()

◆ representsNonPositive()

◆ representsNonZero()

◆ representsNumber()

◆ representsOdd()

◆ representsPositive()

◆ representsRational()

◆ representsReal()

◆ representsScalar()

◆ representsUndefined()

◆ set() [1/3]

◆ set() [2/3]

◆ set() [3/3]