def parse_file(source, destination=sys.stdout):
if type(source) != str or len(source) == 0:
return False
try:
with open(source) as f:
lexer = Lexer(f)
parser = Parser(lexer)
parser.program()
except IOError as e:
destination.write(str(e))
destination.write('\n')
return False
return True
def eval_file(source, argv=sys.argv, destination=sys.stdout):
if type(source) != str or len(source) == 0:
return False
try:
with open(source) as f:
lexer = Lexer(f)
parser = Parser(lexer)
tree = parser.program()
e = Evaluator(argv)
e.eval(tree, e.global_env.env_extend())
except Exception as e:
destination.write(str(e))
destination.write("\n")
return False
return True
def pretty_file(source, destination=sys.stdout):
if type(source) != str or len(source) == 0:
return False
try:
with open(source) as f:
lexer = Lexer(f)
parser = Parser(lexer)
tree = parser.program()
pretty_string = make_pretty(tree)
destination.write(pretty_string)
except IOError as e:
destination.write(str(e))
destination.write('\n')
return False
return True
def eval_swndl(self, text):
l = Lexer(StringIO(text))
p = Parser(l)
tree = p.program()
return self.eval(tree, self.repl_env)