/// <summary>
/// Visit a parse tree produced by <see cref="OALParser.expr"/>.
/// <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 VisitExpr([NotNull] OALParser.ExprContext context)
{
return(VisitChildren(context));
}
public override object VisitExpr([NotNull] OALParser.ExprContext context)
{
//Console.WriteLine("Expr: " + context.ChildCount);
//Console.WriteLine(context.GetChild(0).GetType().Name);
if (context.ChildCount == 1)
{
if (context.GetChild(0).GetType().Name.Contains("TerminalNode") && stackEXEASTNode.Count() == 0)
{
EXEASTNodeLeaf ast = new EXEASTNodeLeaf(ParseUtil.StripWhiteSpace(context.GetChild(0).GetText()));
stackEXEASTNode.Push(ast);
//stackEXEASTNode.Peek().AddOperand(new EXEASTNodeComposite(ParseUtil.StripWhiteSpace(context.GetChild(0).GetText())));
}
else
{
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(new EXEASTNodeLeaf(ParseUtil.StripWhiteSpace(context.GetChild(0).GetText())));
}
}
else if (context.ChildCount == 2)
{
EXEASTNodeComposite ast = new EXEASTNodeComposite(ParseUtil.StripWhiteSpace(context.GetChild(0).GetText()));
stackEXEASTNode.Push(ast);
base.VisitExpr(context);
if (context.GetChild(0).GetType().Name.Contains("TerminalNode") && !context.GetChild(0).GetText().Equals("not "))
{
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(new EXEASTNodeLeaf(ParseUtil.StripWhiteSpace(context.GetChild(1).GetText())));
EXEASTNode temp = stackEXEASTNode.Pop();
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(temp);
}
else if (context.GetChild(0).GetText().Equals("not "))
{
if (stackEXEASTNode.Count() > 1)
{
EXEASTNode temp = stackEXEASTNode.Pop();
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(temp);
}
}
}
else if (context.ChildCount == 3)
{
if (!context.GetChild(0).GetText().Equals("("))
{
EXEASTNodeComposite ast = new EXEASTNodeComposite(ParseUtil.StripWhiteSpace(context.GetChild(1).GetText()));
stackEXEASTNode.Push(ast);
}
base.VisitExpr(context);
if (context.GetChild(0).GetType().Name.Contains("TerminalNode") && !context.GetChild(0).GetText().Equals("("))
{
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(new EXEASTNodeLeaf(ParseUtil.StripWhiteSpace(context.GetChild(0).GetText())));
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(new EXEASTNodeLeaf(ParseUtil.StripWhiteSpace(context.GetChild(2).GetText())));
EXEASTNode temp = stackEXEASTNode.Pop();
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(temp);
}
else if (stackEXEASTNode.Count > 1 && !context.GetChild(0).GetText().Equals("("))
{
EXEASTNode temp = stackEXEASTNode.Pop();
((EXEASTNodeComposite)stackEXEASTNode.Peek()).AddOperand(temp);
}
}
return(null);
//return base.VisitExpr(context);
}
/// <summary>
/// Exit a parse tree produced by <see cref="OALParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitExpr([NotNull] OALParser.ExprContext context)
{
}
