public override SelectionRuleNode VisitBooleanExpression(TmtParser.BooleanExpressionContext context)
{
SelectionRuleNode result;
NaryRuleNode rule = null;
switch (context.op?.GetText())
{
case "and":
rule = new AndRuleNode()
{
Name = "AND"
};
break;
case "or":
rule = new OrRuleNode()
{
Name = "OR"
};
break;
}
if (Rule == null)
{
Rule = rule;
}
var left = Visit(context.left);
var right = Visit(context.right);
if (left != null)
{
if (right != null)
{
rule?.Children.Add(left);
rule?.Children.Add(right);
result = rule;
}
else
{
result = left;
Rule = left;
}
}
else
{
result = right;
Rule = right;
}
return(result);
}
/// <summary>
/// Visit a parse tree produced by the <c>booleanExpression</c>
/// labeled alternative in <see cref="TmtParser.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 VisitBooleanExpression([NotNull] TmtParser.BooleanExpressionContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>booleanExpression</c>
/// labeled alternative in <see cref="TmtParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitBooleanExpression([NotNull] TmtParser.BooleanExpressionContext context)
{
}