public static IEnumerable <MemberExpression> ExtractMembers(Expression expr)
{
var visitor = new MemberExtractor();
visitor.Visit(expr);
return(visitor._members);
}
public static MemberExpression ExtractSingleMember(Expression expr)
{
var visitor = new MemberExtractor();
visitor.Visit(expr);
if (visitor._members.Count == 0)
{
throw new ArgumentNullException(nameof(expr), "No MemberExpression nodes found");
}
if (visitor._members.Count > 1)
{
throw new InvalidOperationException("More than 1 MemberExpression nodes found");
}
return(visitor._members.First());
}