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How to use makeState0 method in avocado

Best Python code snippet using avocado_python

spark.py

Source:spark.py

...72            self.new2old = {}73            self.makeNewRules()74            self.ruleschanged = 075            self.edges, self.cores = {}, {}76            self.states = { 0: self.makeState0() }77            self.makeState(0, self._BOF)78        #79        #  XXX - should find a better way to do this..80        #81        changes = 182        while changes:83            changes = 084            for k, v in self.edges.items():85                if v is None:86                    state, sym = k87                    if self.states.has_key(state):88                        self.goto(state, sym)89                        changes = 190        rv = self.__dict__.copy()91        for s in self.states.values():92            del s.items93        del rv['rule2func']94        del rv['nullable']95        del rv['cores']96        return rv97    def __setstate__(self, D):98        self.rules = {}99        self.rule2func = {}100        self.rule2name = {}101        self.collectRules()102        start = D['rules'][self._START][0][1][1]	# Blech.103        self.augment(start)104        D['rule2func'] = self.rule2func105        D['makeSet'] = self.makeSet_fast106        self.__dict__ = D107    #108    #  A hook for GenericASTBuilder and GenericASTMatcher.  Mess109    #  thee not with this; nor shall thee toucheth the _preprocess110    #  argument to addRule.111    #112    def preprocess(self, rule, func):	return rule, func113    def addRule(self, doc, func, _preprocess=1):114        fn = func115        rules = doc.split()116        index = []117        for i in xrange(len(rules)):118            if rules[i] == '::=':119                index.append(i-1)120        index.append(len(rules))121        for i in xrange(len(index)-1):122            lhs = rules[index[i]]123            rhs = rules[index[i]+2:index[i+1]]124            rule = (lhs, tuple(rhs))125            if _preprocess:126                rule, fn = self.preprocess(rule, func)127            if self.rules.has_key(lhs):128                self.rules[lhs].append(rule)129            else:130                self.rules[lhs] = [ rule ]131            self.rule2func[rule] = fn132            self.rule2name[rule] = func.__name__[2:]133        self.ruleschanged = 1134    def collectRules(self):135        for name in _namelist(self):136            if name[:2] == 'p_':137                func = getattr(self, name)138                doc = func.__doc__139                self.addRule(doc, func)140    def augment(self, start):141        rule = '%s ::= %s %s' % (self._START, self._BOF, start)142        self.addRule(rule, lambda args: args[1], 0)143    def computeNull(self):144        self.nullable = {}145        tbd = []146        for rulelist in self.rules.values():147            lhs = rulelist[0][0]148            self.nullable[lhs] = 0149            for rule in rulelist:150                rhs = rule[1]151                if len(rhs) == 0:152                    self.nullable[lhs] = 1153                    continue154                #155                #  We only need to consider rules which156                #  consist entirely of nonterminal symbols.157                #  This should be a savings on typical158                #  grammars.159                #160                for sym in rhs:161                    if not self.rules.has_key(sym):162                        break163                else:164                    tbd.append(rule)165        changes = 1166        while changes:167            changes = 0168            for lhs, rhs in tbd:169                if self.nullable[lhs]:170                    continue171                for sym in rhs:172                    if not self.nullable[sym]:173                        break174                else:175                    self.nullable[lhs] = 1176                    changes = 1177    def makeState0(self):178        s0 = _State(0, [])179        for rule in self.newrules[self._START]:180            s0.items.append((rule, 0))181        return s0182    def finalState(self, tokens):183        #184        #  Yuck.185        #186        if len(self.newrules[self._START]) == 2 and len(tokens) == 0:187            return 1188        start = self.rules[self._START][0][1][1]189        return self.goto(1, start)190    def makeNewRules(self):191        worklist = []192        for rulelist in self.rules.values():193            for rule in rulelist:194                worklist.append((rule, 0, 1, rule))195        for rule, i, candidate, oldrule in worklist:196            lhs, rhs = rule197            n = len(rhs)198            while i < n:199                sym = rhs[i]200                if not self.rules.has_key(sym) or \201                    not self.nullable[sym]:202                        candidate = 0203                        i = i + 1204                        continue205                newrhs = list(rhs)206                newrhs[i] = self._NULLABLE+sym207                newrule = (lhs, tuple(newrhs))208                worklist.append((newrule, i+1,209                                 candidate, oldrule))210                candidate = 0211                i = i + 1212            else:213                if candidate:214                    lhs = self._NULLABLE+lhs215                    rule = (lhs, rhs)216                if self.newrules.has_key(lhs):217                    self.newrules[lhs].append(rule)218                else:219                    self.newrules[lhs] = [ rule ]220                self.new2old[rule] = oldrule221    def typestring(self, token):222        return None223    def error(self, token):224        print "Syntax error at or near `%s' token" % token225        raise SystemExit226    def parse(self, tokens):227        sets = [ [(1,0), (2,0)] ]228        self.links = {}229        if self.ruleschanged:230            self.computeNull()231            self.newrules = {}232            self.new2old = {}233            self.makeNewRules()234            self.ruleschanged = 0235            self.edges, self.cores = {}, {}236            self.states = { 0: self.makeState0() }237            self.makeState(0, self._BOF)238        for i in xrange(len(tokens)):239            sets.append([])240            if sets[i] == []:241                break				242            self.makeSet(tokens[i], sets, i)243        else:244            sets.append([])245            self.makeSet(None, sets, len(tokens))246        finalitem = (self.finalState(tokens), 0)247        if finalitem not in sets[-2]:248            if len(tokens) > 0:249                self.error(tokens[i-1])250            else:...

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