C# Class xFunc.Maths.Lexer

The lexer for mathematical expressions.

Inheritance: ILexer

显示文件 Open project: sys27/xFunc Class Usage Examples

Public Methods

Method	Description
Lexer ( ) : System	Initializes a new instance of the Lexer class.
Tokenize ( string function ) : IEnumerable	Converts the string into a sequence of tokens.

Private Methods

Method	Description
CountParams ( List tokens ) : IEnumerable	Calculates the number of parametes of functions.
CreateConst ( string match, IList tokens ) : void	Creates the constant token from matched string.
CreateFunction ( string match, IList tokens ) : void	Creates the function token from matched string.
CreateOperations ( string match, IList tokens ) : void	Creates the operation token from matched string.
CreateSymbol ( string match, IList tokens ) : void	Creates the symbol token from matched string.
IsBalanced ( string str ) : bool	Determines whether brackets in the specified string is balanced.
_CountParams ( List tokens, int index ) : int

Method Details

Lexer() public method

Initializes a new instance of the Lexer class.

public Lexer ( ) : System
return	System

Tokenize() public method

Converts the string into a sequence of tokens.

Throws when the parameter is null or empty. Throws when has the not supported symbol.

public Tokenize ( string function ) : IEnumerable
function	string	The string that contains the functions and operators.
return	IEnumerable