public static void Main(string[] args)
{
var x = Expression.Parameter(typeof(int), "x");
var two = Expression.Constant(2, typeof(int));
var multiply = Expression.Multiply(x, two);
var duplicate = Expression.Lambda <Func <int, int> >(multiply, x);
var half = DivisorVisitor.Modify(duplicate);
Console.WriteLine(duplicate.Compile()(2));
Console.WriteLine(half.Compile()(2));
}
public static Expression <Func <int, int> > Modify(Expression node)
{
var visitor = new DivisorVisitor();
return((Expression <Func <int, int> >)visitor.Visit(node));
}
