An::Formula Class Reference

#include <Formula.h>

List of all members.

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Detailed Description

A Formula.

Public Types
typedef std::stack< double >	ResultStack
	Result stack.
typedef double(*	UnaryFunctionPtr )(double)
	pointer to a unary function
typedef std::vector< BytecodeToken * >	Bytecode
	The Bytecode is a vector of tokens.
typedef std::map< std::string, const double * >	VariableMap
	The VariableMap is a map of string to pointers to double.
typedef std::map< std::string, UnaryFunctionPtr >	FunctionMap
	The FunctionMap is a map of string to pointers to function.
Public Member Functions
	Formula (const std::string &formula, bool useStandardFunctions=true)
	Constructor, take a text in input.
virtual	~Formula ()
	Destructor, free tokens.
void	setVariable (const std::string &name, const double &value)
	Set a variable from the formula to an external value.
void	addUnaryFunction (const std::string &name, UnaryFunctionPtr funcPtr)
	Add an unary function.
ParseResult	parse (void)
	Parse, return a ParseResult struct indicating if the parsing was successfull, and if not, the error. All formula variables must be bound to C++ ones by calls to setVariable before this calling this method.
double	eval (void)
	Evaluate the formula.
Static Protected Member Functions
static double	sqr (double v)
	f(x) = x*x
static double	sgn (double v)
	f(x) = 1 if x > 0; -1 if x < 0; 0 otherwise
Protected Attributes
std::string	formulaText
	text of formula
VariableMap	variableMap
	map of variable name to variable values
FunctionMap	functionMap
	map of function name to functions
Bytecode	bytecode
	bytecode of the formula
bool	parsed
	has the formula been parsed?
Classes
struct	BytecodeToken
	An token from the bytecode, can be a variable or an operation. More...
struct	ParseResult
	Result returned by Formula::parse, including error description. More...

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

• an/Formula.h
• an/Formula.cpp

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