TinyLisp: A Language and Parser to See LINQ Expressions in Action

using System.Linq.Expressions;

namespace TinyLisp {

    // simple class that represents an int in an ExpressionTree
    class IntNode : CodeNode {

        // the value
        public int Value { get; set; }

        // constructor
        public IntNode(char Value) {
            char[] c = { Value };
            this.Value = int.Parse(new string(c));
        }

        // Text used for it to display in the TreeView
        public override string Text {
            get { return Value.ToString(); }
        }

        // convert to Linq Expression
        public override Expression ToExpression() {
            // easy, it's a constant with a value
            return Expression.Constant(Value);
        }
    }
}