def main():
global input, grammar
g = Grammar(grammar)
g.parse()
gotos = GotoGenerator(g)
gotos.generate()
gotos.display()
g.first_follow.display()
parsing_table = Table(g, gotos)
parsing_table.generate()
lr_parser = LR_Parser(g, parsing_table, input)
lr_parser.parse()
def main():
pars_arg()
args = parser.parse_args()
if args.fileInput == args.fileOutput:
print("ERROR: you must give different name of files", file=sys.stderr)
return 1
raw_grammar = ""
try:
with open(args.fileInput, "r") as file:
raw_grammar = file.read()
except:
print("ERROR: cannot open " + args.fileInput, file=sys.stderr)
return 1
g = Grammar(raw_grammar)
g.parse()
gotos = GotoGenerator(g)
gotos.generate()
gotos.display(args.verbose)
gotos.create_file(args.fileOutput, args.verbose)
return 0
