BlueSky.SyntaxEditorWindow.isVariable C# (CSharp) Метод

        private void isVariable(ref string stmt) // checks if user want to print a variable. Or function call results.
        {
            int frstopenbrkt = -2, secopenbrkt = -2, closingbrkt = -2, arowassignidx = -2, eqassignidx, assignidx = -2;
            bool beginswithprint = stmt.StartsWith("print(") || stmt.StartsWith("(");
            if (beginswithprint)
            {
                frstopenbrkt = stmt.IndexOf("(");
                secopenbrkt = stmt.IndexOf("(", frstopenbrkt + 1);

            }
            else
            {
                secopenbrkt = stmt.IndexOf("(");
            }

            closingbrkt = stmt.IndexOf(")", secopenbrkt + 1);

            bool hasassignmentoperator = (stmt.Contains("=") || stmt.Contains("<-"));
            if (hasassignmentoperator && secopenbrkt > 0)
            {
                eqassignidx = stmt.IndexOf("=");
                arowassignidx = stmt.IndexOf("<-");
                if (eqassignidx > 0 && arowassignidx > 0) // both assignment oprator exists. say: a<-func(q=TRUE)
                {
                    assignidx = eqassignidx < arowassignidx ? eqassignidx : arowassignidx; // whichever has less idx
                }
                else if (eqassignidx > 0) // only '=' exists
                {
                    assignidx = eqassignidx;
                }
                else if (arowassignidx > 0)//only "<-" exists
                {
                    assignidx = arowassignidx;
                }

                //its not assignment of type 'aa = something'. Rather its assignment in parameters like 'somfunc(isgood=TRUE)'
                if (assignidx > secopenbrkt && closingbrkt > assignidx)//if closing to secopenbrkt closes after assignment'='
                    hasassignmentoperator = false;
            }

            bool beginswithcat = stmt.StartsWith("cat(");

            if (beginswithprint && hasassignmentoperator) // for print(a<-c('msg')
            {
                int indexofopeningprintparenthesis = stmt.IndexOf('(');// first (
                int indexofclosingprintparenthesis = stmt.LastIndexOf(')');// last )
                int indexofassignmentopr = stmt.IndexOf("<-") > 0 ? stmt.IndexOf("<-") : stmt.IndexOf('=');
                string varname = stmt.Substring(indexofopeningprintparenthesis + 1, (indexofassignmentopr - indexofopeningprintparenthesis - 1));// a
                stmt = stmt.Remove(indexofclosingprintparenthesis).Replace("print(", "") + "; print(" + varname + ");";// a<-c('msg'); print(a);
            }
            if (!beginswithprint && !hasassignmentoperator && !beginswithcat)// for a & a+ a+a+a*2 & help(...) & ?...
            {
                stmt = "print(" + stmt + ")";
            }


        }