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...

Macros
#define	DECLARE_BUILTIN_VARIABLE(x)

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 }
	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...

Macro Definition Documentation

#define DECLARE_BUILTIN_VARIABLE

(

x

)

Value:

class x : public DynamicVariable { \
                                          private: \
                                                void calculate() const; \
                                          public: \
                                                x(); \
                                                x(const x *variable) {set(variable);} \
                                                ExpressionItem *copy() const {return new x(this);} \
                                        };

Enumeration Type Documentation

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

enum AssumptionType

Type assumption.

Each type is a subset of the type above.

Enumerator
ASSUMPTION_TYPE_NONMATRIX	Multiplication is NOT commutative.
ASSUMPTION_TYPE_COMPLEX	im(x) != 0

enum VariableSubtype

Type of variable.

Enumerator
SUBTYPE_VARIABLE	class Variable
SUBTYPE_UNKNOWN_VARIABLE	class UnknownVariable
SUBTYPE_KNOWN_VARIABLE	class KnownVariable