using System;
using System.Linq.Expressions;
using System.Reflection;

namespace jive
{
  static public class ExpressionExtensions
  {
    static public PropertyInfo pick_property<T>(this Expression<Func<T, object>> expression)
    {
      return (PropertyInfo) member_expression(expression).Member;
    }

    static MemberExpression member_expression<T>(Expression<Func<T, object>> expression)
    {
      if (expression.Body.NodeType == ExpressionType.Convert)
        return ((UnaryExpression) expression.Body).Operand as MemberExpression;
      if (expression.Body.NodeType == ExpressionType.MemberAccess)
        return expression.Body as MemberExpression;
      throw new NotImplementedException();
    }
  }
}