Ejemplo n.º 1
0
 /// <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));
 }
Ejemplo n.º 2
0
        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);
        }
Ejemplo n.º 3
0
 /// <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)
 {
 }