def main():
import sys, PgenParser, pprint, DFAParser
# ____________________________________________________________
# Generate a test parser
grammarST = PgenParser.parseFile("Grammar")
pgenObj = PyPgen()
grammarObj = pgenObj(grammarST)
if "-py" in sys.argv:
print "# %s" % ("_" * 70)
print "# This was automatically generated by PyPgen."
print "# Hack at your own risk."
print
print "grammarObj =",
pprint.pprint(grammarObj)
if "-i" in sys.argv:
# __________________________________________________
# Parse some input
if len(sys.argv) > 1:
inputFile = sys.argv[1]
fileObj = open(inputFile)
else:
inputFile = "<stdin>"
fileObj = sys.stdin
tokenizer = StdTokenizer.StdTokenizer().tokenize(fileObj)
parseTree = DFAParser.parsetok(tokenizer, grammarObj, 257)
fileObj.close()
# __________________________________________________
# Show the result
if __BASIL__:
from basil.visuals.TreeBox import showTree
showTree(parseTree).mainloop()
else:
pprint.pprint(parseTree)
def main():
graphical = False
if "-g" in sys.argv:
from basil.visuals.TreeBox import showTree
graphical = True
# ____________________________________________________________
grammarST0 = PgenParser.parseFile("test.pgen")
grammarST1Obj = pgen.metaParser.parseFile("test.pgen")
grammarST1 = grammarST1Obj.toTuple()
print "Preliminaries:", grammarST0 == grammarST1
if graphical:
tk = showTree(grammarST0)
showTree(grammarST1, tk)
pgenObj = PyPgen.PyPgen()
parser0 = pgenObj(grammarST0)
parser1 = pgenObj(grammarST1)
parser2Obj = pgen.buildParser(grammarST1Obj)
parser2 = parser2Obj.toTuple()
print "Test 1:", parser0 == parser1
print "Test 2:", parser0 == parser2
# __________________________________________________
# The funny part of this sequence is: if the previous tests worked, isn't
# it reasonable to assume the next test is given? (i.e. the inputs are
# structurally identical!)
testPythonFile = "../PyPgen.py"
fileObj = open(testPythonFile)
tokenizer0 = StdTokenizer.StdTokenizer(testPythonFile, fileObj.readline)
parse0 = DFAParser.parsetok(tokenizer0, parser0, 257)
# __________________________________________________
fileObj.seek(0)
tokenizer1 = StdTokenizer.StdTokenizer(testPythonFile, fileObj.readline)
parse1 = DFAParser.parsetok(tokenizer1, parser1, 257)
# __________________________________________________
fileObj.seek(0)
tokenizer2 = StdTokenizer.StdTokenizer(testPythonFile, fileObj.readline)
parse2 = DFAParser.parsetok(tokenizer2, parser2, 257)
# __________________________________________________
print "Test 3:", parse0 == parse1
print "Test 4:", parse0 == parse2
if graphical:
showTree(parse0, tk)
showTree(parse1, tk)
showTree(parse2, tk)
tk.mainloop()
