BasicParser

Basic parser for evaluating mathematical functions in string form

Uses the railroad shunt algortithm to convert the expression to RPN which is then evaluated

Usage

var parser = new SimpleParser();
var result = parser.Parse("1+3");

Output: 4

Using the symbolic evaluator

var parser = new SimpleParser();
var result = parser.Parse("1+3+5*x","x","5");

Output: 29

Features

• Very modular, operators are added at runtime by instanciating any IOperator class
• Use any converter or parser you want, as long as it extends the interfaces.
• Symbolic evaluator for any amount of symbols

Adding new operators:

To add new operators all that is needed is to instanciate any derived type of the IOperator<T> interface

var addition = new Operator<double>("+", 1, Assosiativity.B, (a, b) => a + b, true, (a) => +a);
or for functions
var sin = new Function<double>("sin", 3, Math.Sin);

symbol : the symbol that you want your operator to be represented by can be any char except: , . ( ) or any digit

precendense : operator precedense, the higher the number the higher the precedense

associativity : If it is left, right assosiative or both.

function : What will the operator return when .Evaluate() is called

specialUnary : Does the operator have a special behaviour when called as a unary operator (like '-') (doesn't need to be set for purely unary operators)

unaryFunc : if specialUnary is true, what will the operator return when .Evaluate() as a unary operator