public override PredicateNode VisitPredicate(PredicateParser.PredicateContext context)
{
// OpenParen predicate CloseParen
if (context.OpenParen() != null)
{
return(Visit(context.predicate().First()));
}
// predicate booleanOperator predicate
if (context.booleanOperator() != null)
{
var booleanOperator = Visit(context.booleanOperator());
booleanOperator.Children.Add(Visit(context.predicate()[0]));
booleanOperator.Children.Add(Visit(context.predicate()[1]));
return(booleanOperator);
}
// operand operator operand
if (context.@operator() != null)
{
var @operator = Visit(context.@operator());
@operator.Children.Add(Visit(context.operand()[0]));
@operator.Children.Add(Visit(context.operand()[1]));
return(@operator);
}
throw new Exception("Unhandled Predicate");
}
/// <summary>
/// Visit a parse tree produced by <see cref="PredicateParser.predicate"/>.
/// <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 VisitPredicate([NotNull] PredicateParser.PredicateContext context)
{
return(VisitChildren(context));
}
