public override object Visit(OrSearchExpression expr, object data)
{
bool first = true;
foreach (var e in expr.Expressions)
{
if (!first)
{
writer.Write(" oder ");
}
else
{
first = false;
}
if (e is AndSearchExpression)
{
writer.Write("(");
}
Visit(e, data);
if (e is AndSearchExpression)
{
writer.Write(")");
}
}
return(null);
}
/// ListSearchExpression ::= "(" ( AndExpressionList | OrExpressionList ) ")"
SearchExpression ListSearchExpression()
{
Expect(TokenKind.OpenParen);
var op = ListOrSearchExpression();
List <SearchExpression> expr = null;
if (la.Kind == TokenKind.And)
{
OperatorList(op, ref expr, TokenKind.And);
op = new AndSearchExpression()
{
Expressions = expr.ToArray()
};
}
else if (la.Kind == TokenKind.Or)
{
OperatorList(op, ref expr, TokenKind.Or);
op = new OrSearchExpression()
{
Expressions = expr.ToArray()
};
}
Expect(TokenKind.CloseParen);
return(op);
}
public abstract S Visit(OrSearchExpression expr, T data);
