public override FilterTerm VisitFilter_expression(V1QueryParser.Filter_expressionContext context)
{
var firstGroup = context.grouped_filter_term(0);
var firstSimple = context.simple_filter_term(0);
FilterTerm leftTerm = firstGroup != null?Visit(firstGroup) : Visit(firstSimple);
int index = 0;
while (true)
{
FilterTermType groupOp;
if (context.and_operator(index) != null)
{
groupOp = FilterTermType.And;
}
else if (context.or_operator(index) != null)
{
groupOp = FilterTermType.Or;
}
else
{
break;
}
index++;
var nextGroup = context.grouped_filter_term(index);
var nextSimple = context.simple_filter_term(index);
FilterTerm rightTerm = nextGroup != null?Visit(nextGroup) : Visit(nextSimple);
if (leftTerm.Type == groupOp)
{
((GroupFilterTerm)leftTerm).Add(rightTerm);
}
else
{
var groupTerm = groupOp == FilterTermType.And ? (GroupFilterTerm) new AndFilterTerm() : new OrFilterTerm();
groupTerm.Add(leftTerm);
groupTerm.Add(rightTerm);
leftTerm = groupTerm;
}
}
return(leftTerm);
}
/// <summary>
/// Exit a parse tree produced by <see cref="V1QueryParser.filter_expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitFilter_expression([NotNull] V1QueryParser.Filter_expressionContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="V1QueryParser.filter_expression"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitFilter_expression([NotNull] V1QueryParser.Filter_expressionContext context)
{
return(VisitChildren(context));
}
