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
def main (*args):
"""main() - Unit test routine for the PushdownAutomaton module."""
from basil.lang.python import DFAParser
from basil.parsing import PgenParser, PyPgen
import sys, getopt
# ____________________________________________________________
opts, args = getopt.getopt(args, "o:")
outFile = sys.stdout
for optFlag, optArg in opts:
if optFlag == "-o":
outFile = open(optArg, "w")
argc = len(args)
if argc > 1:
print "Usage:\n\tPushdownAutomaton.py [opts] <file.pgen>\n"
sys.exit(-1)
elif argc == 1:
srcFile = args[0]
else:
srcFile = "./tests/test.pgen"
grammarST = PgenParser.parseFile(srcFile)
parser = PyPgen.buildParser(grammarST)
grammarTup = parser.grammarObj
# ____________________________________________________________
# Round trip test
myGrammarObj = PushdownGrammar(grammarTup)
myGrammarObj.compareToTuple(grammarTup)
grammarTup2 = myGrammarObj.toTuple()
myGrammarObj.compareToTuple(grammarTup2)
# Now with accelerators...
grammarTup3 = DFAParser.addAccelerators(grammarTup)
myGrammarObj2 = PushdownGrammar(grammarTup3)
myGrammarObj2.compareToTuple(grammarTup3)
grammarTup4 = myGrammarObj2.toTuple()
myGrammarObj2.compareToTuple(grammarTup4)
# ____________________________________________________________
# Output tests.
outFile.write("%s\n" % myGrammarObj2.toString("graphviz"))
if outFile != sys.stdout:
outFile.close()
(321, None),
(27, None),
(25, None),
(328, None),
(326, None),
(1, 'lambda'),
(323, None),
(315, None),
(316, None),
(317, None),
(320, None),
(1, 'class'),
(324, None),
(325, None),
(327, None)],
256,
0)
# ______________________________________________________________________
def getParser (tokenizerFactory = None):
return PyPgen.PyPgenParser(grammarObj, tokenizerFactory)
# ______________________________________________________________________
if __name__ == '__main__':
PyPgen.parserMain(grammarObj)
# ______________________________________________________________________
# End of lang/pypat/PyPatParser.py
