yappy_parser.py 文件源码

def __init__(self, tokenize, grammar, table='YappyTab', no_table=1,
                 tabletype=LALRtable, noconflicts=1, expect=0, **args):
        """@param tokenize: same as for L{Lexer}
        @param grammar: if a string C{parse_grammar} is called

        @param table: and no_table, tabletype same as for L{LRparser}

        @param args: dictionary where:
         - key C{tmpdir} is the directory where the parse table used by the Yappy Grammar is stored;
         -  key  C{usrdir} is the directory where the user tables are stored
         -  key  C{nosemrules} if 1 semantic actions are not applied"""
        self.lex = Lexer(tokenize)
        operators = None
        if self.lex.__dict__.has_key("operators"):
            operators = self.lex.operators
        if type(grammar) is StringType:
            grammar = self.parse_grammar(grammar, {'locals': locals()}, args)
        if args.has_key('usrdir') and os.path.isdir(args['usrdir']):
            table = string.rstrip(args['usrdir']) + '/' + table
        if   os.path.dirname(table) == "" or os.path.exists(os.path.dirname(table)):
            LRparser.__init__(self, grammar,table, no_table, tabletype, operators, noconflicts, expect, **args)
        else:
            sys.stderr.write("Directory %s do not exist\n" % table)
            sys.exit()
        if (self.Log.noconflicts):
            if ((self.Log.conflicts.has_key('sr') and len(self.Log.conflicts['sr']) !=
                self.Log.expect)):
                print "LR conflicts: number %s value %s" % (len(self.Log.conflicts['sr']), self.Log.conflicts)
                print """If it is Ok, set expect to the number of conflicts and build table again"""
            elif self.Log.conflicts.has_key('rr'):
                print "LR conflicts rr : number %s value %s" % (len(self.Log.conflicts['rr']), self.Log.conflicts['rr'])