def parse(self):
"""Parse cases, within each of which there is a pair of input and output.
:return (object, object, [str]): input, output, comments
"""
cases = self.PAT_IO_HEADERS.findall(self.text + 'Input:')
try:
# TODO how about cmts?
cases = [(case, []) for case in cases] if cases else self._parse_cases()
return [(self.params.parse(i), self.rets.parse(o), cmts) for (i, o), cmts in cases]
except ValueError as e:
raise type(e)('{} in \n{}'.format(e.args[0], to_readable(self.text))) from e
def _tokens(self, text):
try:
return self._run(text)
except SyntaxError as e:
MARKER = chr(0)
i, text = self.i, self.text
ch = text[i]
text = text[:i] + MARKER + text[i+1:]
text = to_readable(text)
i = text.index(MARKER)
text = text[:i] + ch + text[i+1:]
e.args = ('{} at index {} in \n{}'.format(e.args[0], i, text),)
raise
def parse(self, text):
"""
:return object:
"""
stack = []
curr = []
local_depth = 0
stypes = []
for token in Tokenizer(text).line():
if isinstance(token, Tokenizer.OpeningBracket):
stack.append(curr)
curr = []
local_depth = max(len(stack), local_depth)
elif isinstance(token, Tokenizer.ClosingBracket):
if not stack:
raise SyntaxError('brackets do not pair')
last_curr = stack.pop()
last_curr.append(curr)
curr = last_curr
if len(stack) == 0:
stypes.append(self.GENERIC + self._LIST * local_depth)
local_depth = 0
elif isinstance(token, Tokenizer.Token):
pass
else:
curr.append(token)
if len(stack) == 0:
stypes.append(type(token).__name__)
if stack:
raise SyntaxError('missing closing brackets')
# print(curr)
data = curr
if self.types:
try:
data = self.cast(data)
except TypeError as e:
ts_expected = ' * '.join(t + self._LIST * d for t, d in self.types)
ts_actual = ' * '.join(stypes)
e.args = ('{}: type ( {} ) is required, but type ( {} ) is given in \n{}'.format(
e.args[0], ts_expected, ts_actual, to_readable(text)),)
raise
# print(data)
return data
