question: public TeXParser ( boolean isPartial , String parseString , TeXFormula formula , boolean firstpass ) { this . formula = formula ; this . isPartial = isPartial ; if ( parseString != null ) { this . parseString = new StringBuffer ( parseString ) ; this . len = parseString . length ( ) ; this . pos = 0 ; if ( firstpass ) { firstpass ( ) ; } } else { this . parseString = null ; this . pos = 0 ; this . len = 0 ; } }
target:  Create a new TeXParser with or without a first pass