UnknownVariable Class Reference

A variable with unknown value. More...

#include <Variable.h>

Inheritance diagram for UnknownVariable:

Public Member Functions
	UnknownVariable (string cat_, string name_, string title_="", bool is_local=true, bool is_builtin=false, bool is_active=true)
	UnknownVariable ()
	UnknownVariable (const UnknownVariable *variable)
virtual ExpressionItem *	copy () const
virtual void	set (const ExpressionItem *item)
bool	isKnown () const
void	setAssumptions (Assumptions *ass)
Assumptions *	assumptions ()
int	subtype () 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	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	representsNonMatrix ()
Public Member Functions inherited from Variable
	Variable (string cat_, string name_, string title_="", bool is_local=true, bool is_builtin=false, bool is_active=true)
	Variable (const Variable *variable)
virtual int	type () const
virtual bool	representsEven (bool=false)
virtual bool	representsOdd (bool=false)
virtual bool	representsUndefined (bool=false, bool=false, bool=false)
virtual bool	representsBoolean ()
Public Member Functions inherited from ExpressionItem
	ExpressionItem (string cat_, string name_, string title_="", 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 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 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 (string sname, size_t index, bool force=true)
virtual void	addName (const ExpressionName &ename, size_t index=0, bool force=true)
virtual void	addName (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 string &sname, bool case_sensitive=true) const
virtual size_t	hasNameCaseSensitive (const 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 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 (string title_)
virtual const string &	description () const
virtual void	setDescription (string descr_)
virtual const string &	category () const
virtual void	setCategory (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 Attributes
Assumptions *	o_assumption
Protected Attributes inherited from ExpressionItem
string	scat
string	stitle
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
vector< ExpressionItem * >	v_refs
vector< ExpressionName >	names

Detailed Description

A variable with unknown value.

Unknown variables have an associated assumption object.

Constructor & Destructor Documentation

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

Create an unknown.

Parameters

cat_	Category that the variable belongs to.
name_	Initial name of the variable.
title_	Descriptive name.
is_local	If the variable is local/user-defined or global.
is_builtin	If the variable is builtin and not modifiable.
is_active	If the variable is active and can be used in expressions.

UnknownVariable::UnknownVariable

(

)

Create an empty unknown variable.

UnknownVariable::UnknownVariable

(

const UnknownVariable *

variable

)

Create a copy of an unknown variable.

Parameters

variable

Unknown variable to copy.

Member Function Documentation

Assumptions* UnknownVariable::assumptions

(

)

Returns the assumptions of the unknown variable.

Returns

Assumptions of the unknown variable.

bool UnknownVariable::isKnown ( ) const

inlinevirtual

Returns if the variable has a known value (as oppossed to assumptions).

Returns

true if the variable is of class KnownVariable, false if UnknownVariable.

Implements Variable.

virtual bool UnknownVariable::representsPositive ( bool  = false )

virtual

Returns if the variable represents a positive value.

Reimplemented from Variable.

void UnknownVariable::setAssumptions

(

Assumptions *

ass

)

Sets the assumptions of the unknown variable.

Parameters

ass	Assumptions.

int UnknownVariable::subtype ( ) const

inlinevirtual

Returns the subtype of the variable, corresponding to which subsubclass the object belongs to.

Returns

VariableSubtype.

Reimplemented from Variable.

References SUBTYPE_UNKNOWN_VARIABLE.

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

• libqalculate/Variable.h