* @throws InvalidStartRule
*/
private static DefaultTranslationMapper createMapper() throws StateConflict, InvalidStartRule, StrandedSymbol {
DefaultTranslationMapper mapper = new DefaultTranslationMapper() ;
mapper.addTranslation(new Rule("E'","E"),new OneTrans()) ;
mapper.addTranslation(new Rule("E","E","+","F"),new OpTrans()) ;
mapper.addTranslation(new Rule("E","F"),new OneTrans()) ;
mapper.addTranslation(new Rule("F","F","*","T"),new OpTrans()) ;
mapper.addTranslation(new Rule("F","T"),new OneTrans()) ;
mapper.addTranslation(new Rule("T","id"),new OneTrans()) ;
mapper.addTranslation(new Rule("T","(","E",")"),new Paren()) ;