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Bugs found in 3.0 decomplation...

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parsers/parse30.py; fix set comprehension grammar bug
uncompyle6/semantics/n_actions.py: evidence of the evils of modifying node data (via node.pop)
This commit is contained in:
rocky
2024-02-12 00:58:42 -05:00
parent ca04ae98f7
commit 02ed25e7cb
2 changed files with 44 additions and 39 deletions
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64
uncompyle6/parsers/parse30.py
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@@ -1,4 +1,4 @@
# Copyright (c) 2016-2017, 2022-2023 Rocky Bernstein
# Copyright (c) 2016-2017, 2022-2024 Rocky Bernstein
"""
spark grammar differences over Python 3.1 for Python 3.0.
"""
@@ -7,8 +7,8 @@ from __future__ import print_function
from uncompyle6.parser import PythonParserSingle
from uncompyle6.parsers.parse31 import Python31Parser
class Python30Parser(Python31Parser):
class Python30Parser(Python31Parser):
def p_30(self, args):
"""
@@ -78,7 +78,6 @@ class Python30Parser(Python31Parser):
set_comp_func ::= set_comp_header
LOAD_ARG FOR_ITER store comp_iter
JUMP_BACK ending_return
RETURN_VALUE RETURN_LAST
list_comp_header ::= BUILD_LIST_0 DUP_TOP STORE_FAST
list_comp ::= list_comp_header
@@ -118,7 +117,7 @@ class Python30Parser(Python31Parser):
# From Python 2.6
lc_body ::= LOAD_FAST expr LIST_APPEND
lc_body ::= LOAD_FAST expr LIST_APPEND
lc_body ::= LOAD_NAME expr LIST_APPEND
list_if ::= expr jmp_false_then list_iter
list_if_not ::= expr jmp_true list_iter JUMP_BACK come_froms POP_TOP
@@ -216,9 +215,9 @@ class Python30Parser(Python31Parser):
compare_chained_right ::= expr COMPARE_OP RETURN_END_IF
"""
def remove_rules_30(self):
self.remove_rules("""
self.remove_rules(
"""
# The were found using grammar coverage
while1stmt ::= SETUP_LOOP l_stmts COME_FROM JUMP_BACK COME_FROM_LOOP
@@ -286,29 +285,30 @@ class Python30Parser(Python31Parser):
or ::= expr JUMP_IF_TRUE_OR_POP expr COME_FROM
and ::= expr JUMP_IF_TRUE_OR_POP expr COME_FROM
and ::= expr JUMP_IF_FALSE_OR_POP expr COME_FROM
""")
"""
)
def customize_grammar_rules(self, tokens, customize):
super(Python30Parser, self).customize_grammar_rules(tokens, customize)
self.remove_rules_30()
self.check_reduce["iflaststmtl"] = "AST"
self.check_reduce['ifstmt'] = "AST"
self.check_reduce["ifstmt"] = "AST"
self.check_reduce["ifelsestmtc"] = "AST"
self.check_reduce["ifelsestmt"] = "AST"
# self.check_reduce["and"] = "stmt"
return
def reduce_is_invalid(self, rule, ast, tokens, first, last):
invalid = super(Python30Parser,
self).reduce_is_invalid(rule, ast,
tokens, first, last)
invalid = super(Python30Parser, self).reduce_is_invalid(
rule, ast, tokens, first, last
)
if invalid:
return invalid
lhs = rule[0]
if (
lhs in ("iflaststmtl", "ifstmt",
"ifelsestmt", "ifelsestmtc") and ast[0] == "testexpr"
lhs in ("iflaststmtl", "ifstmt", "ifelsestmt", "ifelsestmtc")
and ast[0] == "testexpr"
):
testexpr = ast[0]
if testexpr[0] == "testfalse":
@@ -316,7 +316,10 @@ class Python30Parser(Python31Parser):
if lhs == "ifelsestmtc" and ast[2] == "jump_absolute_else":
jump_absolute_else = ast[2]
come_from = jump_absolute_else[2]
return come_from == "COME_FROM" and come_from.attr < tokens[first].offset
return (
come_from == "COME_FROM"
and come_from.attr < tokens[first].offset
)
pass
elif lhs in ("ifelsestmt", "ifelsestmtc") and ast[2] == "jump_cf_pop":
jump_cf_pop = ast[2]
@@ -339,11 +342,11 @@ class Python30Parser(Python31Parser):
jmp_false = testfalse[1]
if last == len(tokens):
last -= 1
while (isinstance(tokens[first].offset, str) and first < last):
while isinstance(tokens[first].offset, str) and first < last:
first += 1
if first == last:
return True
while (first < last and isinstance(tokens[last].offset, str)):
while first < last and isinstance(tokens[last].offset, str):
last -= 1
if rule[0] == "iflaststmtl":
return not (jmp_false[0].attr <= tokens[last].offset)
@@ -351,8 +354,9 @@ class Python30Parser(Python31Parser):
jmp_false_target = jmp_false[0].attr
if tokens[first].offset > jmp_false_target:
return True
return (
(jmp_false_target > tokens[last].offset) and tokens[last] != "JUMP_FORWARD")
return (jmp_false_target > tokens[last].offset) and tokens[
last
] != "JUMP_FORWARD"
pass
pass
pass
@@ -361,33 +365,43 @@ class Python30Parser(Python31Parser):
pass
class Python30ParserSingle(Python30Parser, PythonParserSingle):
pass
if __name__ == '__main__':
if __name__ == "__main__":
# Check grammar
p = Python30Parser()
p.remove_rules_30()
p.check_grammar()
from xdis.version_info import PYTHON_VERSION_TRIPLE, IS_PYPY
from xdis.version_info import IS_PYPY, PYTHON_VERSION_TRIPLE
if PYTHON_VERSION_TRIPLE[:2] == (3, 0):
lhs, rhs, tokens, right_recursive, dup_rhs = p.check_sets()
from uncompyle6.scanner import get_scanner
s = get_scanner(PYTHON_VERSION_TRIPLE, IS_PYPY)
opcode_set = set(s.opc.opname).union(set(
"""JUMP_BACK CONTINUE RETURN_END_IF COME_FROM
opcode_set = set(s.opc.opname).union(
set(
"""JUMP_BACK CONTINUE RETURN_END_IF COME_FROM
LOAD_GENEXPR LOAD_ASSERT LOAD_SETCOMP LOAD_DICTCOMP LOAD_CLASSNAME
LAMBDA_MARKER RETURN_LAST
""".split()))
""".split()
)
)
## FIXME: try this
remain_tokens = set(tokens) - opcode_set
import re
remain_tokens = set([re.sub(r'_\d+$', '', t) for t in remain_tokens])
remain_tokens = set([re.sub('_CONT$', '', t) for t in remain_tokens])
remain_tokens = set([re.sub(r"_\d+$", "", t) for t in remain_tokens])
remain_tokens = set([re.sub("_CONT$", "", t) for t in remain_tokens])
remain_tokens = set(remain_tokens) - opcode_set
print(remain_tokens)
import sys
if len(sys.argv) > 1:
from spark_parser.spark import rule2str
for rule in sorted(p.rule2name.items()):
print(rule2str(rule[0]))