Isis::CubeInfixToPostfix Class Reference

Converter for math equations. More...

#include <CubeInfixToPostfix.h>

Inheritance diagram for Isis::CubeInfixToPostfix:

Collaboration diagram for Isis::CubeInfixToPostfix:

Public Member Functions
	CubeInfixToPostfix ()
	Constructs a CubeInfixToPostfix converter. More...
QString	convert (const QString &infix)
	This method converts infix to postfix. More...
QString	tokenizeEquation (const QString &equation)
	This method will add spaces between all operators and numbers, making it possible to get each element of the equation one by one. More...

Protected Member Functions
bool	isKnownSymbol (QString representation)
	This method will return true if it believes the argument represents a valid function or operator. More...
InfixOperator *	findOperator (QString representation)
	This method will return a pointer to the operator represented by 'representation. More...

Protected Attributes
QList< InfixOperator * >	p_operators

Private Member Functions
void	initialize ()
	This method is used to create functions that are specific to cubes. More...

Detailed Description

Converter for math equations.

This class converts infix equations to postfix

Author

2007-08-21 Steven Lambright

History:

2010-02-23 Steven Lambright Updated to use InfixOperator class method instead of direct access to member

2012-02-02 Jeff Anderson - Added the Initialize method and camera variables (phase, incidence, etc) for a cube

2012-02-09 Jeff Anderson - Modified to conform to ISIS programming standards

Definition at line 52 of file CubeInfixToPostfix.h.

Constructor & Destructor Documentation

CubeInfixToPostfix()

Isis::CubeInfixToPostfix::CubeInfixToPostfix

(

)

Constructs a CubeInfixToPostfix converter.

Author

janderson (2/2/2012)

Definition at line 34 of file CubeInfixToPostfix.cpp.

Member Function Documentation

convert()

QString Isis::InfixToPostfix::convert ( const QString &  infix )

inherited

This method converts infix to postfix.

It uses an enhanced verion of the algorithm found on page 159 of "Data Structures & Algorithms in Java" Second Edition by Robert Lafore. First, we prep the equation with TokenizeEquation and then parse through it using the known-good algorithm.

Parameters

infix

The infix equation

Returns

IString The postfix equation

Definition at line 154 of file InfixToPostfix.cpp.

References _FILEINFO_, Isis::IString::Remove(), Isis::toDouble(), Isis::IString::Token(), and Isis::IString::ToQt().

Referenced by Isis::InlineCalculator::toPostfix().

findOperator()

InfixOperator * Isis::CubeInfixToPostfix::findOperator ( QString  representation )

protectedvirtual

This method will return a pointer to the operator represented by 'representation.

' Because in this model a function is an operator, this will return a pointer to functions as well (in a base class pointer).

Parameters

representation

The symbolic representation of the operator, such as '+'

Returns

InfixOperator* A pointer to the operator object that contains known information about the operator

Reimplemented from Isis::InfixToPostfix.

Definition at line 99 of file CubeInfixToPostfix.cpp.

References _FILEINFO_.

initialize()

void Isis::CubeInfixToPostfix::initialize ( )

private

This method is used to create functions that are specific to cubes.

Moved the cubemin and cubemax functions out of the InfixToPostfix initialization method into this method

Author

janderson (2/2/2012)

Definition at line 45 of file CubeInfixToPostfix.cpp.

isKnownSymbol()

bool Isis::CubeInfixToPostfix::isKnownSymbol ( QString  representation )

protectedvirtual

This method will return true if it believes the argument represents a valid function or operator.

Parameters

representation

The symbolic representation of the operator, such as 'sin'

Returns

bool True if it looks valid, false if it's not known

Reimplemented from Isis::InfixToPostfix.

Definition at line 79 of file CubeInfixToPostfix.cpp.

tokenizeEquation()

QString Isis::InfixToPostfix::tokenizeEquation ( const QString &  equation )

inherited

This method will add spaces between all operators and numbers, making it possible to get each element of the equation one by one.

It will also parse out the function calls, adding parenthesis where needed so the user doesn't have to. The result is an equation ready for parsing (but NOT fully parenthesized, just enough to make sure our algorithm makes no mistakes).

Parameters

equation

An unformatted infix equation

Returns

IString A tokenized equation with additional parentheses

Definition at line 384 of file InfixToPostfix.cpp.

References Isis::IString::DownCase(), and Isis::IString::ToQt().

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

• src/base/objs/CubeInfixToPostfix/CubeInfixToPostfix.h
• src/base/objs/CubeInfixToPostfix/CubeInfixToPostfix.cpp