def __init__ (self):
global my_grammar
self.handlers = trampoline.pgen_grammar_to_handlers(my_grammar, {})
self.handlers['start'] = self.parse_start
self.handlers['qsuite'] = self.parse_qsuite
qsuite_index = [dfa[0] for dfa in my_grammar[0]
if dfa[1] == 'qsuite'][0]
self.handlers[qsuite_index] = self.parse_qsuite
def __init__(self, start_symbol=None):
self.handlers = trampoline.pgen_grammar_to_handlers(
self.my_grammar, {})
nonterminal_override_names = 'mysuite', 'myexpr0', 'myexpr1'
nonterminal_overrides = ((dfa[1], dfa[0])
for dfa in self.my_grammar[0]
if dfa[1] in nonterminal_override_names)
for nonterminal_name, nonterminal_index in nonterminal_overrides:
handler = getattr(self, 'parse_%s' % nonterminal_name)
self.handlers[nonterminal_name] = handler
self.handlers[nonterminal_index] = handler
self.start_symbol = (start_symbol if start_symbol is not None
else 'file_input')
self.handlers['start'] = self.parse_start
def setUp (self):
# Parse the MyFront grammar, create a set of automata for it (like
# pgen does), and then convert the automata to generators for the
# treepoline.
grammar_st = PgenParser.parseFile(basil.lang.python.__path__[0] +
"/python26/Grammar")
grammar_obj = PyPgen.buildParser(grammar_st)
grammar_obj.setStart(grammar_obj.stringToSymbolMap()['file_input'])
self.parser1 = grammar_obj
gram_tup0 = grammar_obj.toTuple()
gram_tup1 = DFAParser.addAccelerators(gram_tup0)
handlers = trampoline.pgen_grammar_to_handlers(gram_tup1, {})
# Override the start special nonterminal to just do what it is
# supposed to:
def parse_start (instream, outtree):
yield 'file_input'
handlers['start'] = parse_start
self.handlers = handlers
