| libqalculate-5.6.0
    | 
Abstract base class for variables. More...
#include <Variable.h>
 
  
| Public Member Functions | |
| 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 ExpressionItem * | copy () const =0 | 
| virtual void | set (const ExpressionItem *item) | 
| virtual int | type () const | 
| virtual int | subtype () const | 
| virtual bool | isKnown () const =0 | 
| 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 | representsFraction (bool=false) | 
| virtual bool | representsNumber (bool=false) | 
| virtual bool | representsRational (bool=false) | 
| virtual bool | representsReal (bool=false) | 
| virtual bool | representsNonComplex (bool b=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 () | 
| virtual int | id () 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) | 
| Additional Inherited Members | |
| 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 | 
Abstract base class for variables.
A variable is an alpha-numerical representation of a known or unknown value.
| 
 | pure virtual | 
Implements ExpressionItem.
| 
 | inlinevirtual | 
Reimplemented from ExpressionItem.
| 
 | pure virtual | 
Returns if the variable has a known value (as opposed to assumptions).
Implemented in KnownVariable, and UnknownVariable.
| 
 | inlinevirtual | 
Returns if the variable represents a positive value.
Reimplemented in DynamicVariable, KnownVariable, NowVariable, TodayVariable, TomorrowVariable, UnknownVariable, and YesterdayVariable.
| 
 | virtual | 
Reimplemented from ExpressionItem.
| 
 | inlinevirtual | 
Returns the subtype of the variable, corresponding to which subsubclass the object belongs to.
Implements ExpressionItem.
Reimplemented in KnownVariable, and UnknownVariable.
References SUBTYPE_VARIABLE.
| 
 | inlinevirtual | 
Returns the type of the expression item, corresponding to which subclass the object belongs to.
Implements ExpressionItem.
References TYPE_VARIABLE.