Files
python-uncompyle6/uncompyle6/parsers/reducecheck/whilestmt38.py
2022-07-06 13:00:52 -04:00

42 lines
1.6 KiB
Python

# Copyright (c) 2022 Rocky Bernstein
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
def whilestmt38_check(
self, lhs: str, n: int, rule, ast, tokens: list, first: int, last: int
) -> bool:
# When we are missing a COME_FROM_LOOP, the
# "while" statement is nested inside an if/else
# so after the POP_BLOCK we have a JUMP_FORWARD which forms the "else" portion of the "if"
# Check this.
# print("XXX", first, last, rule)
# for t in range(first, last):
# print(tokens[t])
# print("=" * 40)
if tokens[last] != "COME_FROM" and tokens[last - 1] == "COME_FROM":
last -= 1
if tokens[last - 1].kind.startswith("RAISE_VARARGS"):
return True
while tokens[last] == "COME_FROM":
last -= 1
# In a "while" loop, (in contrast to "for" loop), the loop jump is
# always to the first offset
first_offset = tokens[first].off2int()
if tokens[last] == "JUMP_LOOP" and (
tokens[last].attr == first_offset or tokens[last - 1].attr == first_offset
):
return False
return True