FunctionParserBase Class Reference

Base class for function parsers. More...

#include <function_parser.hpp>

Inheritance diagram for FunctionParserBase:

Collaboration diagram for FunctionParserBase:

Public Member Functions
virtual	~FunctionParserBase ()=default
virtual std::function< double(double)>	parse ()=0
	Pure virtual method to parse the function string.
	FunctionParserBase (std::string function_str)
	Constructor for FunctionParserBase.

Static Public Member Functions
static std::function< double(double)>	parseFunction (const std::string &function_str)
	Static method to parse a function string and return a callable function.
static bool	isPolynomial (const std::string &expression)
	Static method to check if the expression is a polynomial.
static bool	isTrigonometric (const std::string &expression)
	Static method to check if the expression is a trigonometric function.

Static Protected Member Functions
static bool	icontains (const std::string &hay, const std::string &needle)
	Helper static method to check if a string contains a substring (case-insensitive).
static std::string	removeSpaces (const std::string &function_str)
	Helper static method to remove all whitespace from a string.
static std::vector< std::string >	splitSignTokens (const std::string &expr_no_ws)
	Helper static method to split an expression into tokens based on sign characters.
static std::pair< double, std::string >	parseOptionalCoefficient (const std::string &token)
	Helper static method to parse an optional coefficient from a token.

Protected Attributes
std::string	function_str
	The function string to be parsed.

Friends
class	FunctionParserBaseTester
	Friend test fixture class for unit testing.

Detailed Description

Base class for function parsers.

This abstract class defines the interface for parsing mathematical functions from strings. It includes static methods for dispatching to specific parser subclasses based on the type of function (e.g., polynomial, trigonometric).

Constructor & Destructor Documentation

~FunctionParserBase()

virtual FunctionParserBase::~FunctionParserBase ( )

virtualdefault

FunctionParserBase()

FunctionParserBase::FunctionParserBase

(

std::string

function_str

)

Constructor for FunctionParserBase.

Parameters

function_str

The string representation of the function to be parsed.

Member Function Documentation

icontains()

bool FunctionParserBase::icontains ( const std::string &  hay, const std::string &  needle  )

staticprotected

Helper static method to check if a string contains a substring (case-insensitive).

Parameters

hay	The string to search within.
needle	The substring to search for.

Returns

true if hay contains needle, false otherwise.

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isPolynomial()

bool FunctionParserBase::isPolynomial ( const std::string &  expression )

inlinestatic

Static method to check if the expression is a polynomial.

Parameters

expression

The expression string to check.

Returns

true if the expression is a polynomial, false otherwise.

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isTrigonometric()

bool FunctionParserBase::isTrigonometric ( const std::string &  expression )

inlinestatic

Static method to check if the expression is a trigonometric function.

Parameters

expression

The expression string to check.

Returns

true if the expression is trigonometric, false otherwise.

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parse()

virtual std::function< double(double)> FunctionParserBase::parse ( )

pure virtual

Pure virtual method to parse the function string.

Returns

A std::function<double(double)> representing the parsed function.

Implemented in PolynomialParser, and TrigonometricParser.

parseFunction()

std::function< double(double)> FunctionParserBase::parseFunction ( const std::string &  function_str )

static

Static method to parse a function string and return a callable function.

This method determines the type of function represented by the input string and delegates parsing to the appropriate subclass parser.

Parameters

function_str

The string representation of the function to be parsed.

Returns

A std::function<double(double)> representing the parsed function.

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parseOptionalCoefficient()

std::pair< double, std::string > FunctionParserBase::parseOptionalCoefficient ( const std::string &  token )

staticprotected

Helper static method to parse an optional coefficient from a token.

Parameters

token

The token string to parse.

Returns

A pair containing the coefficient and the remaining string.

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removeSpaces()

std::string FunctionParserBase::removeSpaces ( const std::string &  function_str )

staticprotected

Helper static method to remove all whitespace from a string.

Parameters

function_str

The input string.

Returns

A new string with all whitespace removed.

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splitSignTokens()

std::vector< std::string > FunctionParserBase::splitSignTokens ( const std::string &  expr_no_ws )

staticprotected

Helper static method to split an expression into tokens based on sign characters.

Parameters

expr_no_ws

The expression string with no whitespace.

Returns

A vector of tokens split by sign characters.

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Friends And Related Symbol Documentation

FunctionParserBaseTester

friend class FunctionParserBaseTester

friend

Friend test fixture class for unit testing.

Member Data Documentation

function_str

std::string FunctionParserBase::function_str

protected

The function string to be parsed.

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

• ROOT/ROOT/function_parser.hpp
• ROOT/ROOT/function_parser.cpp