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from .utils import FlexibleIterator, BaronError
class UnExpectedFormattingToken(BaronError):
pass
class GroupingError(BaronError):
pass
GROUP_THOSE = (
"ENDL",
# TODO test those 2
"COMMENT",
"SPACE",
)
ENTER_GROUPING_MODE = (
"LEFT_PARENTHESIS",
"LEFT_BRACKET",
"LEFT_SQUARE_BRACKET",
)
QUIT_GROUPING_MODE = (
"RIGHT_PARENTHESIS",
"RIGHT_BRACKET",
"RIGHT_SQUARE_BRACKET",
)
GROUP_ON = (
"COMMA",
"COLON",
# TODO test everything bellow
"STRING",
"RAW_STRING",
"INTERPOLATED_STRING",
"INTERPOLATED_RAW_STRING",
"BINARY_STRING",
"BINARY_RAW_STRING",
"UNICODE_STRING",
"UNICODE_RAW_STRING",
"AS",
"IMPORT",
"DOUBLE_STAR",
"DOT",
"LEFT_SQUARE_BRACKET",
"STAR",
"SLASH",
"PERCENT",
"DOUBLE_SLASH",
"PLUS",
"MINUS",
"LEFT_SHIFT",
"RIGHT_SHIFT",
"AMPER",
"CIRCUMFLEX",
"VBAR",
"LESS",
"GREATER",
"EQUAL_EQUAL",
"LESS_EQUAL",
"GREATER_EQUAL",
"NOT_EQUAL",
"IN",
"IS",
"NOT",
"AND",
"OR",
"AT",
"IF",
"ELSE",
"FROM",
"EQUAL",
"PLUS_EQUAL",
"MINUS_EQUAL",
"AT_EQUAL",
"STAR_EQUAL",
"SLASH_EQUAL",
"PERCENT_EQUAL",
"AMPER_EQUAL",
"VBAR_EQUAL",
"CIRCUMFLEX_EQUAL",
"LEFT_SHIFT_EQUAL",
"RIGHT_SHIFT_EQUAL",
"DOUBLE_STAR_EQUAL",
"DOUBLE_SLASH_EQUAL",
"ENDL",
"FOR",
"COLON",
"RAW_STRING",
"UNICODE_STRING",
"UNICODE_RAW_STRING",
) + ENTER_GROUPING_MODE + QUIT_GROUPING_MODE
def append_to_token_after(token, to_append_list):
if len(token) == 2:
return (token[0], token[1], [], to_append_list)
elif len(token) == 3:
return (token[0], token[1], token[2], to_append_list)
elif len(token) == 4:
return (token[0], token[1], token[2], token[3] + to_append_list)
def append_to_token_before(token, to_append_list):
if len(token) == 2:
return (token[0], token[1], to_append_list, [])
elif len(token) == 3:
return (token[0], token[1], to_append_list + token[2], [])
elif len(token) == 4:
return (token[0], token[1], to_append_list + token[2], token[3])
def group(sequence):
return list(group_generator(sequence))
def fail_on_bad_token(token, debug_file_content, in_grouping_mode):
if token[0] in GROUP_ON:
return
debug_file_content += _append_to_debug_file_content(token)
debug_file_content = debug_file_content.split("\n")
debug_file_content = list(zip(range(1, len(debug_file_content) + 1), debug_file_content))
debug_file_content = debug_file_content[-8:]
debug_file_content = "\n".join(["%4s %s" % (x[0], x[1]) for x in debug_file_content])
raise GroupingError("Fail to group formatting tokens, here:\n%s <----\n\n'%s' should have been in: %s\n\nCurrent value of 'in_grouping_mode': %s" % (debug_file_content, token, ', '.join(sorted(GROUP_ON)), in_grouping_mode))
def _append_to_debug_file_content(token):
before_debug = "".join(map(lambda x: x[1], token[2] if len(token) >= 3 else []))
after_debug = "".join(map(lambda x: x[1], token[3] if len(token) >= 4 else []))
return before_debug + token[1] + after_debug
def group_generator(sequence):
iterator = FlexibleIterator(sequence)
current = None, None
in_grouping_mode = 0
debug_file_content = ""
while True:
if iterator.end():
return
current = next(iterator)
debug_file_content += _append_to_debug_file_content(current)
if current[0] in ENTER_GROUPING_MODE:
in_grouping_mode += 1
elif current[0] in QUIT_GROUPING_MODE:
in_grouping_mode -= 1
assert in_grouping_mode >= 0
if in_grouping_mode:
if current[0] in GROUP_THOSE:
to_group = [current]
while iterator.show_next() and iterator.show_next()[0] in GROUP_THOSE:
to_group.append(next(iterator))
debug_file_content += _append_to_debug_file_content(to_group[-1])
# XXX don't remember how (:() but I can end up finding a
# DEDENT/INDENT token in this situation and I don't want to
# group on it. Need to do test for that.
if iterator.show_next()[0] in ("INDENT", "DEDENT"):
yield next(iterator)
fail_on_bad_token(iterator.show_next(), debug_file_content, in_grouping_mode)
current = append_to_token_before(next(iterator), to_group)
if current[0] in ENTER_GROUPING_MODE:
in_grouping_mode += 1
# TODO test
if current[0] in QUIT_GROUPING_MODE:
in_grouping_mode -= 1
assert in_grouping_mode >= 0
yield current
continue
if current[0] in GROUP_ON:
while iterator.show_next() and iterator.show_next()[0] in GROUP_THOSE:
debug_file_content += _append_to_debug_file_content(iterator.show_next())
current = append_to_token_after(current, [next(iterator)])
yield current
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