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Implementing Programming Languages Using C# 4.0

, 12 Jul 2012 MIT
An introduction to creating programming language tools using C# 4.0.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Diggins.Jigsaw
{
    class ArithmeticGrammar : SharedGrammar
    {
        new public static Rule Integer = Node(SharedGrammar.Integer);
        new public static Rule Float = Node(SharedGrammar.Float);
        public static Rule RecExpr = Recursive(() => Expression);
        public static Rule ParanExpr = Node(CharToken('(') + RecExpr + WS + CharToken(')'));
        public static Rule Number = (Integer | Float) + WS;
        public static Rule PrefixOp = Node(MatchStringSet("! - ~"));
        public static Rule PrefixExpr = Node(PrefixOp + Recursive(() => SimpleExpr));
        public static Rule SimpleExpr = PrefixExpr | Number | ParanExpr;
        public static Rule BinaryOp = Node(MatchStringSet("<= >= == != << >> && || < > & | + - * % / ^"));
        public static Rule Expression = Node(SimpleExpr + ZeroOrMore(BinaryOp + WS + SimpleExpr));
        static ArithmeticGrammar() { InitGrammar(typeof(ArithmeticGrammar)); }
    }
}

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This article, along with any associated source code and files, is licensed under The MIT License

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About the Author

Christopher Diggins
Software Developer Autodesk
Canada Canada
This article was written by Christopher Diggins, a computer science nerd who currently works at Autodesk as an SDK specialist.

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