Antlr4.Semantics.BasicSemanticChecks.ExitMode C# (CSharp) Метод

        protected override void ExitMode(GrammarAST tree)
        {
            if (nonFragmentRuleCount == 0)
            {
                IToken token = tree.Token;
                string name = "?";
                if (tree.ChildCount > 0)
                {
                    name = tree.GetChild(0).Text;
                    if (string.IsNullOrEmpty(name))
                    {
                        name = "?";
                    }

                    token = ((GrammarAST)tree.GetChild(0)).Token;
                }

                g.tool.errMgr.GrammarError(ErrorType.MODE_WITHOUT_RULES, g.fileName, token, name, g);
            }
        }