Math::Expression Class Reference

Parsed Math expression. More...

Public Types
enum	VarType { Variable, Constant, Recursive }

Public Member Functions
virtual double	getValue () const =0
virtual int	nrVariables () const
virtual const char *	fullVariableExpression (int) const
virtual void	setVariableValue (int, double)
int	nrUniqueVarNames () const
const char *	uniqueVarName (int idx) const
int	indexOfUnVarName (const char *nm) const
int	firstOccurVarName (const char *) const
VarType	getType (int varidx) const
int	getConstIdx (int varidx) const
bool	isRecursive () const
virtual Expression *	clone () const =0
virtual	~Expression ()
const char *	type () const
void	dump (BufferString &str) const

Protected Member Functions
	Expression (int nrinputs)
int	nrInputs () const
bool	setInput (int, Expression *)
void	copyInput (Expression *target) const
void	addIfOK (const char *)
void	doDump (BufferString &, int nrtabs) const
virtual void	dumpSpecifics (BufferString &, int nrtabs) const

Protected Attributes
ObjectSet< TypeSet< int > >	variableobj_
ObjectSet< TypeSet< int > >	variablenr_
ObjectSet< Expression >	inputs_
BufferStringSet	varnms_
bool	isrecursive_

Friends
class	ExpressionParser

Detailed Description

Parsed Math expression.

A Expression can be queried about its variables with getNrVariables(), and each variable's name can be queried with getVariableStr( int ).

When a calculations should be done, all variables must be set with setVariable( int, double ). Then, the calculation can be done with getValue().

Member Enumeration Documentation

enum Math::Expression::VarType

Enumerator
Variable
Constant
Recursive

Constructor & Destructor Documentation

virtual Math::Expression::~Expression ( )

virtual

Math::Expression::Expression ( int  nrinputs )

protected

Member Function Documentation

void Math::Expression::addIfOK ( const char *  )

protected

virtual Expression* Math::Expression::clone ( ) const

pure virtual

void Math::Expression::copyInput ( Expression *  target ) const

protected

void Math::Expression::doDump ( BufferString &  , int  nrtabs  ) const

protected

void Math::Expression::dump ( BufferString &  str ) const

inline

virtual void Math::Expression::dumpSpecifics ( BufferString &  , int  nrtabs  ) const

inlineprotectedvirtual

int Math::Expression::firstOccurVarName

(

const char *

)

const

virtual const char* Math::Expression::fullVariableExpression ( int  ) const

virtual

int Math::Expression::getConstIdx

(

int

varidx

)

const

VarType Math::Expression::getType

(

int

varidx

)

const

virtual double Math::Expression::getValue ( ) const

pure virtual

int Math::Expression::indexOfUnVarName ( const char *  nm ) const

inline

bool Math::Expression::isRecursive ( ) const

inline

int Math::Expression::nrInputs ( ) const

inlineprotected

int Math::Expression::nrUniqueVarNames ( ) const

inline

virtual int Math::Expression::nrVariables ( ) const

virtual

bool Math::Expression::setInput ( int  , Expression *    )

protected

virtual void Math::Expression::setVariableValue ( int  , double    )

virtual

const char* Math::Expression::type

(

)

const

const char* Math::Expression::uniqueVarName ( int  idx ) const

inline

Friends And Related Function Documentation

friend class ExpressionParser

friend

Member Data Documentation

ObjectSet<Expression> Math::Expression::inputs_

protected

bool Math::Expression::isrecursive_

protected

ObjectSet<TypeSet<int> > Math::Expression::variablenr_

protected

ObjectSet<TypeSet<int> > Math::Expression::variableobj_

protected

BufferStringSet Math::Expression::varnms_

protected