An expression executable as function. More...

#include <FuncExpression.h>

Public Member Functions
	FuncExpression ()
	Construct an empty executable expression. More...

	FuncExpression (const String &prog)
	Construct an executable expression from the given string. More...

	FuncExpression (const FuncExpression &other)
	Make this object a (deep) copy of other. More...

FuncExpression &	operator= (const FuncExpression &other)
	Make this object a (deep) copy of other. More...

	~FuncExpression ()
	Destructor. More...

Bool	create (const String &prog)
	Create an executable program. More...

const String &	errorMessage ()
	Get the current error message. More...

const vector < FuncExprData::ExprOperator > &	getCode () const
	Get the executable program. More...

uInt	getNpar () const
	Get the number of parameters in executable program. More...

uInt	getNdim () const
	Get the number of dimensions of executable program. More...

const vector < FuncExprData::ExprOperator > &	getCode ()
	Get reference to the compiled program. More...

const vector< Double > &	getConst ()
	Get reference to compiled constants. More...

Bool	exec (Double &res) const
	Execute the program. More...

void	print (ostream &os) const
	Print the stack information (mainly for debugging) More...

Private Member Functions
Bool	compStmt (MUString &prg)
	Compile a statement (in prg, which will be adjusted) More...

Bool	compExpr (MUString &prg)
	Compile an expression (in prg, which will be adjusted) More...

Bool	compTerm (MUString &prg)
	Compile a term (in prg, which will be adjusted) More...

Bool	setOp (FuncExprData::ExprOperator &oper)
	Save an operation on compilation RP stack. More...

Bool	setVal (const Double &val)
	Save a value on constant stack. More...

Bool	setCode (const FuncExprData::ExprOperator &oper)
	Save an executable code. More...

void	initState ()
	Initialise the state. More...

Private Attributes
FuncExprData	exd
	The expression data /// later into a singleton. More...

String	error_p
	The latest error message. More...

vector < FuncExprData::ExprOperator >	code_p
	The executable code stack (a vector, since it is a re-usable stack) More...

vector < FuncExprData::ExprOperator >	rps_p
	The reverse Polish work stack (a vector, since deque did not work on gcc) More...

FuncExprData::ExprCompState	state_p
	The current state of the compilation. More...

vector< Double >	const_p
	The current constant stack. More...

uInt	npar_p
	The number of parameters in code. More...

uInt	ndim_p
	The number of dimensions of expression. More...

vector< Double >	exec_p
	Executing stack. More...

Detailed Description

An expression executable as function.

Intended use:

Public interface

Review Status

Date Reviewed:: yyyy/mm/dd

Prerequisite

Function class

Synopsis

This class acts as an interface between a program given as a string (e.g. from a command line interface) and a Function class. The grammar of the language use to express the function is given below. The FuncEXpression can be used in all places where Functions can be used (like in the linear and non-linear Fitting classes.

An expression is created by either supplying a String to a constructor, or be setting a String.

Example

Motivation

To tie the Glish language to non-linear fitting procedures

Thrown Exceptions

AipsError if an illegal program passed in constructor

To Do

nothing directly

Definition at line 84 of file FuncExpression.h.

Constructor & Destructor Documentation

casacore::FuncExpression::FuncExpression ( )

Construct an empty executable expression.

casacore::FuncExpression::FuncExpression ( const String & prog )

explicit

Construct an executable expression from the given string.

casacore::FuncExpression::FuncExpression ( const FuncExpression & other )

Make this object a (deep) copy of other.

casacore::FuncExpression::~FuncExpression ( )

inline

Destructor.

Definition at line 99 of file FuncExpression.h.

Member Function Documentation

Bool casacore::FuncExpression::compExpr ( MUString & prg )

private

Compile an expression (in prg, which will be adjusted)

Bool casacore::FuncExpression::compStmt ( MUString & prg )

private

Compile a statement (in prg, which will be adjusted)

Bool casacore::FuncExpression::compTerm ( MUString & prg )

private

Compile a term (in prg, which will be adjusted)

Bool casacore::FuncExpression::create ( const String & prog )

Create an executable program.

const String& casacore::FuncExpression::errorMessage ( )

inline

Get the current error message.

Definition at line 105 of file FuncExpression.h.

References error_p.

Bool casacore::FuncExpression::exec ( Double & res ) const

Execute the program.

const vector<FuncExprData::ExprOperator>& casacore::FuncExpression::getCode ( ) const

Get the executable program.

const vector<FuncExprData::ExprOperator>& casacore::FuncExpression::getCode ( )

inline

Get reference to the compiled program.

Definition at line 113 of file FuncExpression.h.

References code_p.

const vector<Double>& casacore::FuncExpression::getConst ( )

inline

Get reference to compiled constants.

Definition at line 115 of file FuncExpression.h.

References const_p.

uInt casacore::FuncExpression::getNdim ( ) const

inline

Get the number of dimensions of executable program.

Definition at line 111 of file FuncExpression.h.

References ndim_p.

uInt casacore::FuncExpression::getNpar ( ) const

inline

Get the number of parameters in executable program.

Definition at line 109 of file FuncExpression.h.

References npar_p.

void casacore::FuncExpression::initState ( )

private

Initialise the state.

FuncExpression& casacore::FuncExpression::operator= ( const FuncExpression & other )

Make this object a (deep) copy of other.

void casacore::FuncExpression::print ( ostream & os ) const

Print the stack information (mainly for debugging)

Bool casacore::FuncExpression::setCode ( const FuncExprData::ExprOperator & oper )

private

Save an executable code.

Bool casacore::FuncExpression::setOp ( FuncExprData::ExprOperator & oper )

private

Save an operation on compilation RP stack.

Bool casacore::FuncExpression::setVal ( const Double & val )

private

Save a value on constant stack.

Member Data Documentation

vector<FuncExprData::ExprOperator> casacore::FuncExpression::code_p

private

The executable code stack (a vector, since it is a re-usable stack)

Definition at line 128 of file FuncExpression.h.

Referenced by getCode().

vector<Double> casacore::FuncExpression::const_p

private

The current constant stack.

Definition at line 134 of file FuncExpression.h.

Referenced by getConst().

String casacore::FuncExpression::error_p

mutableprivate

The latest error message.

Definition at line 126 of file FuncExpression.h.

Referenced by errorMessage().

FuncExprData casacore::FuncExpression::exd

private

The expression data /// later into a singleton.

Definition at line 124 of file FuncExpression.h.

vector<Double> casacore::FuncExpression::exec_p

mutableprivate

Executing stack.

Definition at line 140 of file FuncExpression.h.

uInt casacore::FuncExpression::ndim_p

private

The number of dimensions of expression.

Definition at line 138 of file FuncExpression.h.

Referenced by getNdim().

uInt casacore::FuncExpression::npar_p

private

The number of parameters in code.

Definition at line 136 of file FuncExpression.h.

Referenced by getNpar().

vector<FuncExprData::ExprOperator> casacore::FuncExpression::rps_p

private

The reverse Polish work stack (a vector, since deque did not work on gcc)

Definition at line 130 of file FuncExpression.h.

FuncExprData::ExprCompState casacore::FuncExpression::state_p

private

The current state of the compilation.

Definition at line 132 of file FuncExpression.h.

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

casa/casacore/scimath/Functionals/FuncExpression.h

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Intended use:

Review Status

Prerequisite

Synopsis

Example

Motivation

Thrown Exceptions

To Do

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation