Variable.h File Reference

#include <libqalculate/ExpressionItem.h>
#include <libqalculate/includes.h>

Classes
class	Assumptions
	An assumption about an unknown mathematical value. More...
class	Variable
	Abstract base class for variables. More...
class	UnknownVariable
	A variable with unknown value. More...
class	KnownVariable
	A variable with a known value. More...
class	DynamicVariable
	Abstract base class for variables with a value which is recalculated when the precision has changed. More...
class	PrecisionVariable
	Dynamic variable for Pi. More...
class	TodayVariable
class	TomorrowVariable
class	YesterdayVariable
class	NowVariable
class	UptimeVariable

Macros
#define	DECLARE_BUILTIN_VARIABLE(x, i)

Enumerations
enum	AssumptionType {   ASSUMPTION_TYPE_NONE = 0 , ASSUMPTION_TYPE_NONMATRIX = 1 , ASSUMPTION_TYPE_NUMBER = 2 , ASSUMPTION_TYPE_COMPLEX = 3 ,   ASSUMPTION_TYPE_REAL = 4 , ASSUMPTION_TYPE_RATIONAL = 5 , ASSUMPTION_TYPE_INTEGER = 6 , ASSUMPTION_TYPE_BOOLEAN = 7 }
	Type assumption. More...
enum	AssumptionSign {   ASSUMPTION_SIGN_UNKNOWN , ASSUMPTION_SIGN_POSITIVE , ASSUMPTION_SIGN_NONNEGATIVE , ASSUMPTION_SIGN_NEGATIVE ,   ASSUMPTION_SIGN_NONPOSITIVE , ASSUMPTION_SIGN_NONZERO }
	Signedness assumption. More...
enum	VariableSubtype { SUBTYPE_VARIABLE , SUBTYPE_UNKNOWN_VARIABLE , SUBTYPE_KNOWN_VARIABLE }
	Type of variable. More...
enum	{   VARIABLE_ID_E = 100 , VARIABLE_ID_PI = 101 , VARIABLE_ID_EULER = 102 , VARIABLE_ID_CATALAN = 103 ,   VARIABLE_ID_PRECISION = 140 , VARIABLE_ID_TODAY = 161 , VARIABLE_ID_TOMORROW = 162 , VARIABLE_ID_YESTERDAY = 163 ,   VARIABLE_ID_NOW = 164 , VARIABLE_ID_UPTIME = 201 }

Macro Definition Documentation

DECLARE_BUILTIN_VARIABLE

#define DECLARE_BUILTIN_VARIABLE	(		x,
			i
	)

Value:

                                          class x : public DynamicVariable { \
                                          private: \
                                                void calculate(MathStructure &m) const; \
                                          public: \
                                                x(); \
                                                x(const x *variable) {set(variable);} \
                                                ExpressionItem *copy() const {return new x(this);} \
                                                int id() const {return i;} \
                                        };

Enumeration Type Documentation

AssumptionSign

enum AssumptionSign

Signedness assumption.

Enumerator
ASSUMPTION_SIGN_UNKNOWN	x = ?
ASSUMPTION_SIGN_POSITIVE	x > 0
ASSUMPTION_SIGN_NONNEGATIVE	x >= 0
ASSUMPTION_SIGN_NEGATIVE	x < 0
ASSUMPTION_SIGN_NONPOSITIVE	x <= 0
ASSUMPTION_SIGN_NONZERO	x != 0

AssumptionType

enum AssumptionType

Type assumption.

Each type is a subset of the type above.

Enumerator
ASSUMPTION_TYPE_NONE	Multiplication is NOT commutative; do not use.
ASSUMPTION_TYPE_COMPLEX	im(x) != 0

VariableSubtype

enum VariableSubtype

Type of variable.

Enumerator
SUBTYPE_VARIABLE	class Variable
SUBTYPE_UNKNOWN_VARIABLE	class UnknownVariable
SUBTYPE_KNOWN_VARIABLE	class KnownVariable