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Implementing Programming Languages Using C# 4.0

, 12 Jul 2012
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
{
    public class VarBindings
    {
        public string Name;
        public object Value;
        public VarBindings Tail;
        
        public VarBindings AddBinding(string name, object value)
        {
            return new VarBindings { Name = name, Value = value, Tail = this };
        }
        
        public IEnumerable<VarBindings> Bindings
        {
            get
            {
                for (var b = this; b != null; b = b.Tail)
                    yield return b;
            }
        }

        public VarBindings FindBindingOrDefault(string name)
        {
            return Bindings.FirstOrDefault(c => c.Name == name);
        }

        public VarBindings FindBinding(string name)
        {
            var r = FindBindingOrDefault(name);
            if (r == null) throw new Exception("Name does not exist in context: " + name);
            return r; 
        }
        
        public object Find(string name)
        {
            return FindBinding(name).Value;
        }
        
        public object this[string name]
        {
            get { return Find(name); }
        }

        public dynamic Bind(string name, dynamic value)
        {
            return FindBinding(name).Value = value;
        }
    }
}

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License

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

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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Web03 | 2.8.140721.1 | Last Updated 12 Jul 2012
Article Copyright 2011 by Christopher Diggins
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