private SqlListNode <TNode> ParseList <TNode>(ITokenizer t, Func <ITokenizer, TNode> getItem)
where TNode : class, ISqlNode
{
if (t.Peek().IsType(SqlTokenType.EndOfInput))
{
return(null);
}
// <Item> ("," <Item>)*
var list = new SqlListNode <TNode>();
while (true)
{
var item = getItem(t);
if (item == null)
{
break;
}
list.Children.Add(item);
if (t.NextIs(SqlTokenType.Symbol, ",", true))
{
continue;
}
break;
}
if (list.Children.Count == 0)
{
return(null);
}
list.Location = list.Children[0].Location;
return(list);
}
public virtual ISqlNode VisitList <TNode>(SqlListNode <TNode> n)
where TNode : class, ISqlNode
{
var list = VisitTypedNodeList(n.Children);
return(n.Update(list));
}
public bool AssertIsNotNullOrEmpty <TNode>(ISqlNode parent, string name, SqlListNode <TNode> list)
where TNode : class, ISqlNode
{
if (list == null || list.Count == 0)
{
return(AddError(parent, name, "List node may not be null or empty"));
}
return(true);
}
public bool AssertIsNotEmpty <TNode>(ISqlNode parent, string name, SqlListNode <TNode> list)
where TNode : class, ISqlNode
{
if (list.Count == 0)
{
return(AddError(parent, name, "List is empty"));
}
return(true);
}
private ISqlNode VisitList <TNode>(SqlListNode <TNode> n, Action between)
where TNode : class, ISqlNode
{
if (n.Children.Count == 0)
{
return(n);
}
Visit(n.Children[0]);
for (int i = 1; i < n.Children.Count; i++)
{
between?.Invoke();
Visit(n.Children[i]);
}
return(n);
}
public ISqlNode VisitList <TNode>(SqlListNode <TNode> n)
where TNode : class, ISqlNode
=> VisitList(n, () => Append(", "));
public override ISqlNode VisitList <TNode>(SqlListNode <TNode> n)
{
return(base.VisitList(n));
}