Antlr4.Semantics.BasicSemanticChecks.EnterTerminal C# (CSharp) Method

        protected override void EnterTerminal(GrammarAST tree)
        {
            string text = tree.Text;
            if (text.Equals("''"))
            {
                g.tool.errMgr.GrammarError(ErrorType.EMPTY_STRINGS_AND_SETS_NOT_ALLOWED, g.fileName, tree.Token);
            }
        }