Math::ExpressionParser Class Reference

Parses a string with a mathematical expression. More...

Public Member Functions
	ExpressionParser (const char *str=0, bool inputsareseries=true)
const char *	errMsg () const
bool	foundOldAbs () const
Expression *	parse () const
void	setInput (const char *s)

Static Public Member Functions
static int	constIdxOf (const char *)
static BufferString	varNameOf (const char *fullvarnm, int *shift=0)
static Expression::VarType	varTypeOf (const char *)

Protected Member Functions
bool	findAndOrOr (char *, int, Expression *&) const
bool	findInequality (char *, int, Expression *&) const
bool	findMathFunction (BufferString &, int, Expression *&) const
bool	findOtherOper (BufferString &, int, Expression *&) const
bool	findOuterAbs (char *, int, Expression *&) const
bool	findOuterParens (char *, int, Expression *&) const
bool	findPlusAndMinus (char *, int, Expression *&) const
bool	findQMarkOper (char *, int, Expression *&) const
bool	findStatsFunction (BufferString &, int, Expression *&) const
bool	findVariable (char *, int, Expression *&) const
Expression *	parse (const char *) const

Protected Attributes
bool	abswarn_
BufferString	errmsg_
BufferString	inp_
const bool	inputsareseries_

Detailed Description

Parses a string with a mathematical expression.

The expression can consist of constants, variables, operators and standard mathematical functions. A constant can be any number like 3, -5, 3e-5, or pi. Everything that does not start with a digit and is not an operator is treated as a variable. An operator can be either:

+, -, *, /, ^, >, <, <=, >=, ==, !=, &&, ||, cond ? true stat : false stat, or |abs|

A mathematical function can be either:

sin(), cos(), tan(), ln(), log(), exp() or sqrt ().

If the parser returns null, it couldn't parse the expression. Then, errmsg_ should contain info.

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Constructor & Destructor Documentation

ExpressionParser()

Math::ExpressionParser::ExpressionParser ( const char *  str = 0, bool  inputsareseries = true  )

inline

Member Function Documentation

constIdxOf()

static int Math::ExpressionParser::constIdxOf ( const char *  )

static

errMsg()

const char* Math::ExpressionParser::errMsg ( ) const

inline

findAndOrOr()

bool Math::ExpressionParser::findAndOrOr ( char *  , int  , Expression *&    ) const

protected

findInequality()

bool Math::ExpressionParser::findInequality ( char *  , int  , Expression *&    ) const

protected

findMathFunction()

bool Math::ExpressionParser::findMathFunction ( BufferString &  , int  , Expression *&    ) const

protected

findOtherOper()

bool Math::ExpressionParser::findOtherOper ( BufferString &  , int  , Expression *&    ) const

protected

findOuterAbs()

bool Math::ExpressionParser::findOuterAbs ( char *  , int  , Expression *&    ) const

protected

findOuterParens()

bool Math::ExpressionParser::findOuterParens ( char *  , int  , Expression *&    ) const

protected

findPlusAndMinus()

bool Math::ExpressionParser::findPlusAndMinus ( char *  , int  , Expression *&    ) const

protected

findQMarkOper()

bool Math::ExpressionParser::findQMarkOper ( char *  , int  , Expression *&    ) const

protected

findStatsFunction()

bool Math::ExpressionParser::findStatsFunction ( BufferString &  , int  , Expression *&    ) const

protected

findVariable()

bool Math::ExpressionParser::findVariable ( char *  , int  , Expression *&    ) const

protected

foundOldAbs()

bool Math::ExpressionParser::foundOldAbs ( ) const

inline

parse() [1/2]

Expression* Math::ExpressionParser::parse

(

)

const

parse() [2/2]

Expression* Math::ExpressionParser::parse ( const char *  ) const

protected

setInput()

void Math::ExpressionParser::setInput ( const char *  s )

inline

varNameOf()

static BufferString Math::ExpressionParser::varNameOf ( const char *  fullvarnm, int *  shift = 0  )

static

varTypeOf()

static Expression::VarType Math::ExpressionParser::varTypeOf ( const char *  )

static

Member Data Documentation

abswarn_

bool Math::ExpressionParser::abswarn_

mutableprotected

errmsg_

BufferString Math::ExpressionParser::errmsg_

mutableprotected

inp_

BufferString Math::ExpressionParser::inp_

protected

inputsareseries_

const bool Math::ExpressionParser::inputsareseries_

protected