You've already forked python-uncompyle6
mirror of
https://github.com/rocky/python-uncompyle6.git
synced 2025-08-02 16:44:46 +08:00
495 lines
18 KiB
Python
495 lines
18 KiB
Python
# Copyright (c) 2018-2020 by 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/>.
|
|
|
|
"""Isolate Python 3 version-specific semantic actions here.
|
|
"""
|
|
|
|
from uncompyle6.semantics.consts import TABLE_DIRECT
|
|
|
|
from xdis import co_flags_is_async, iscode
|
|
from uncompyle6.scanner import Code
|
|
from uncompyle6.semantics.helper import (
|
|
find_code_node,
|
|
gen_function_parens_adjust,
|
|
)
|
|
|
|
from uncompyle6.semantics.make_function3 import make_function3_annotate
|
|
from uncompyle6.semantics.customize35 import customize_for_version35
|
|
from uncompyle6.semantics.customize36 import customize_for_version36
|
|
from uncompyle6.semantics.customize37 import customize_for_version37
|
|
from uncompyle6.semantics.customize38 import customize_for_version38
|
|
|
|
|
|
def customize_for_version3(self, version):
|
|
TABLE_DIRECT.update(
|
|
{
|
|
"comp_for": (" for %c in %c", (2, "store"), (0, "expr")),
|
|
"if_exp_not": (
|
|
"%c if not %c else %c",
|
|
(2, "expr"),
|
|
(0, "expr"),
|
|
(4, "expr"),
|
|
),
|
|
"except_cond2": ("%|except %c as %c:\n", (1, "expr"), (5, "store")),
|
|
"function_def_annotate": ("\n\n%|def %c%c\n", -1, 0),
|
|
# When a generator is a single parameter of a function,
|
|
# it doesn't need the surrounding parenethesis.
|
|
"call_generator": ("%c%P", 0, (1, -1, ", ", 100)),
|
|
"importmultiple": ("%|import %c%c\n", 2, 3),
|
|
"import_cont": (", %c", 2),
|
|
"kwarg": ("%[0]{attr}=%c", 1),
|
|
"raise_stmt2": ("%|raise %c from %c\n", 0, 1),
|
|
"tf_tryelsestmtl3": ( '%c%-%c%|else:\n%+%c', 1, 3, 5 ),
|
|
"store_locals": ("%|# inspect.currentframe().f_locals = __locals__\n",),
|
|
"with": ("%|with %c:\n%+%c%-", 0, 3),
|
|
"withasstmt": ("%|with %c as (%c):\n%+%c%-", 0, 2, 3),
|
|
}
|
|
)
|
|
|
|
assert version >= 3.0
|
|
|
|
# In 2.5+ and 3.0+ "except" handlers and the "finally" can appear in one
|
|
# "try" statement. So the below has the effect of combining the
|
|
# "tryfinally" with statement with the "try_except" statement.
|
|
# FIXME: something doesn't smell right, since the semantics
|
|
# are different. See test_fileio.py for an example that shows this.
|
|
def tryfinallystmt(node):
|
|
suite_stmts = node[1][0]
|
|
if len(suite_stmts) == 1 and suite_stmts[0] == 'stmt':
|
|
stmt = suite_stmts[0]
|
|
try_something = stmt[0]
|
|
if try_something == "try_except":
|
|
try_something.kind = "tf_try_except"
|
|
if try_something.kind.startswith("tryelsestmt"):
|
|
if try_something == "tryelsestmtl3":
|
|
try_something.kind = 'tf_tryelsestmtl3'
|
|
else:
|
|
try_something.kind = 'tf_tryelsestmt'
|
|
self.default(node)
|
|
self.n_tryfinallystmt = tryfinallystmt
|
|
|
|
def listcomp_closure3(node):
|
|
"""List comprehensions in Python 3 when handled as a closure.
|
|
See if we can combine code.
|
|
"""
|
|
p = self.prec
|
|
self.prec = 27
|
|
|
|
code_obj = node[1].attr
|
|
assert iscode(code_obj)
|
|
code = Code(code_obj, self.scanner, self.currentclass)
|
|
ast = self.build_ast(code._tokens, code._customize)
|
|
self.customize(code._customize)
|
|
|
|
# skip over: sstmt, stmt, return, ret_expr
|
|
# and other singleton derivations
|
|
while len(ast) == 1 or (
|
|
ast in ("sstmt", "return") and ast[-1] in ("RETURN_LAST", "RETURN_VALUE")
|
|
):
|
|
self.prec = 100
|
|
ast = ast[0]
|
|
|
|
n = ast[1]
|
|
|
|
# collections is the name of the expression(s) we are iterating over
|
|
collections = [node[-3]]
|
|
list_ifs = []
|
|
|
|
if self.version == 3.0 and n != "list_iter":
|
|
# FIXME 3.0 is a snowflake here. We need
|
|
# special code for this. Not sure if this is totally
|
|
# correct.
|
|
stores = [ast[3]]
|
|
assert ast[4] == "comp_iter"
|
|
n = ast[4]
|
|
# Find the list comprehension body. It is the inner-most
|
|
# node that is not comp_.. .
|
|
while n == "comp_iter":
|
|
if n[0] == "comp_for":
|
|
n = n[0]
|
|
stores.append(n[2])
|
|
n = n[3]
|
|
elif n[0] in ("comp_if", "comp_if_not"):
|
|
n = n[0]
|
|
# FIXME: just a guess
|
|
if n[0].kind == "expr":
|
|
list_ifs.append(n)
|
|
else:
|
|
list_ifs.append([1])
|
|
n = n[2]
|
|
pass
|
|
else:
|
|
break
|
|
pass
|
|
|
|
# Skip over n[0] which is something like: _[1]
|
|
self.preorder(n[1])
|
|
|
|
else:
|
|
assert n == "list_iter"
|
|
stores = []
|
|
# Find the list comprehension body. It is the inner-most
|
|
# node that is not list_.. .
|
|
while n == "list_iter":
|
|
|
|
# recurse one step
|
|
n = n[0]
|
|
|
|
if n == "list_for":
|
|
stores.append(n[2])
|
|
n = n[3]
|
|
if n[0] == "list_for":
|
|
# Dog-paddle down largely singleton reductions
|
|
# to find the collection (expr)
|
|
c = n[0][0]
|
|
if c == "expr":
|
|
c = c[0]
|
|
# FIXME: grammar is wonky here? Is this really an attribute?
|
|
if c == "attribute":
|
|
c = c[0]
|
|
collections.append(c)
|
|
pass
|
|
elif n in ("list_if", "list_if_not"):
|
|
# FIXME: just a guess
|
|
if n[0].kind == "expr":
|
|
list_ifs.append(n)
|
|
else:
|
|
list_ifs.append([1])
|
|
n = n[2]
|
|
pass
|
|
elif n == "list_if37":
|
|
list_ifs.append(n)
|
|
n = n[-1]
|
|
pass
|
|
elif n == "list_afor":
|
|
collections.append(n[0][0])
|
|
n = n[1]
|
|
stores.append(n[1][0])
|
|
n = n[3]
|
|
pass
|
|
|
|
assert n == "lc_body", ast
|
|
|
|
self.preorder(n[0])
|
|
|
|
# FIXME: add indentation around "for"'s and "in"'s
|
|
n_colls = len(collections)
|
|
for i, store in enumerate(stores):
|
|
if i >= n_colls:
|
|
break
|
|
if collections[i] == "LOAD_DEREF" and co_flags_is_async(code_obj.co_flags):
|
|
self.write(" async")
|
|
pass
|
|
self.write(" for ")
|
|
self.preorder(store)
|
|
self.write(" in ")
|
|
self.preorder(collections[i])
|
|
if i < len(list_ifs):
|
|
self.preorder(list_ifs[i])
|
|
pass
|
|
pass
|
|
self.prec = p
|
|
self.listcomp_closure3 = listcomp_closure3
|
|
|
|
def n_classdef3(node):
|
|
"""Handle "classdef" nonterminal for 3.0 >= version 3.0 <= 3.5
|
|
"""
|
|
|
|
assert 3.0 <= self.version <= 3.5
|
|
|
|
# class definition ('class X(A,B,C):')
|
|
cclass = self.currentclass
|
|
|
|
# Pick out various needed bits of information
|
|
# * class_name - the name of the class
|
|
# * subclass_info - the parameters to the class e.g.
|
|
# class Foo(bar, baz)
|
|
# ----------
|
|
# * subclass_code - the code for the subclass body
|
|
subclass_info = None
|
|
if node == "classdefdeco2":
|
|
if self.version <= 3.3:
|
|
class_name = node[2][0].attr
|
|
else:
|
|
class_name = node[1][2].attr
|
|
build_class = node
|
|
else:
|
|
build_class = node[0]
|
|
class_name = node[1][0].attr
|
|
build_class = node[0]
|
|
|
|
assert "mkfunc" == build_class[1]
|
|
mkfunc = build_class[1]
|
|
if mkfunc[0] in ("kwargs", "no_kwargs"):
|
|
if 3.0 <= self.version <= 3.2:
|
|
for n in mkfunc:
|
|
if hasattr(n, "attr") and iscode(n.attr):
|
|
subclass_code = n.attr
|
|
break
|
|
elif n == "expr":
|
|
subclass_code = n[0].attr
|
|
pass
|
|
pass
|
|
else:
|
|
for n in mkfunc:
|
|
if hasattr(n, "attr") and iscode(n.attr):
|
|
subclass_code = n.attr
|
|
break
|
|
pass
|
|
pass
|
|
if node == "classdefdeco2":
|
|
subclass_info = node
|
|
else:
|
|
subclass_info = node[0]
|
|
elif build_class[1][0] == "load_closure":
|
|
# Python 3 with closures not functions
|
|
load_closure = build_class[1]
|
|
if hasattr(load_closure[-3], "attr"):
|
|
# Python 3.3 classes with closures work like this.
|
|
# Note have to test before 3.2 case because
|
|
# index -2 also has an attr.
|
|
subclass_code = find_code_node(load_closure, -3).attr
|
|
elif hasattr(load_closure[-2], "attr"):
|
|
# Python 3.2 works like this
|
|
subclass_code = find_code_node(load_closure, -2).attr
|
|
else:
|
|
raise "Internal Error n_classdef: cannot find class body"
|
|
if hasattr(build_class[3], "__len__"):
|
|
if not subclass_info:
|
|
subclass_info = build_class[3]
|
|
elif hasattr(build_class[2], "__len__"):
|
|
subclass_info = build_class[2]
|
|
else:
|
|
raise "Internal Error n_classdef: cannot superclass name"
|
|
elif not subclass_info:
|
|
if mkfunc[0] in ("no_kwargs", "kwargs"):
|
|
subclass_code = mkfunc[1].attr
|
|
else:
|
|
subclass_code = mkfunc[0].attr
|
|
if node == "classdefdeco2":
|
|
subclass_info = node
|
|
else:
|
|
subclass_info = node[0]
|
|
|
|
if node == "classdefdeco2":
|
|
self.write("\n")
|
|
else:
|
|
self.write("\n\n")
|
|
|
|
self.currentclass = str(class_name)
|
|
self.write(self.indent, "class ", self.currentclass)
|
|
|
|
self.print_super_classes3(subclass_info)
|
|
self.println(":")
|
|
|
|
# class body
|
|
self.indent_more()
|
|
self.build_class(subclass_code)
|
|
self.indent_less()
|
|
|
|
self.currentclass = cclass
|
|
if len(self.param_stack) > 1:
|
|
self.write("\n\n")
|
|
else:
|
|
self.write("\n\n\n")
|
|
|
|
self.prune()
|
|
|
|
self.n_classdef3 = n_classdef3
|
|
|
|
if version == 3.0:
|
|
# In Python 3.0 there is code to move from _[dd] into
|
|
# the iteration variable. These rules we can ignore
|
|
# since we pick up the iteration variable some other way and
|
|
# we definitely don't include in the source _[dd].
|
|
TABLE_DIRECT.update({
|
|
"ifstmt30": ( "%|if %c:\n%+%c%-",
|
|
(0, "testfalse_then"),
|
|
(1, "_ifstmts_jump30") ),
|
|
"ifnotstmt30": ( "%|if not %c:\n%+%c%-",
|
|
(0, "testtrue_then"),
|
|
(1, "_ifstmts_jump30") ),
|
|
"try_except30": ( "%|try:\n%+%c%-%c\n\n",
|
|
(1, "suite_stmts_opt"),
|
|
(4, "except_handler") ),
|
|
|
|
})
|
|
|
|
def n_comp_iter(node):
|
|
if node[0] == "expr":
|
|
n = node[0][0]
|
|
if n == "LOAD_FAST" and n.pattr[0:2] == "_[":
|
|
self.prune()
|
|
pass
|
|
pass
|
|
# Not this special case, proceed as normal...
|
|
self.default(node)
|
|
|
|
self.n_comp_iter = n_comp_iter
|
|
|
|
elif version == 3.3:
|
|
# FIXME: perhaps this can be folded into the 3.4+ case?
|
|
def n_yield_from(node):
|
|
assert node[0] == "expr"
|
|
if node[0][0] == "get_iter":
|
|
# Skip over yield_from.expr.get_iter which adds an
|
|
# extra iter(). Maybe we can do in tranformation phase instead?
|
|
template = ("yield from %c", (0, "expr"))
|
|
self.template_engine(template, node[0][0])
|
|
else:
|
|
template = ("yield from %c", (0, "attribute"))
|
|
self.template_engine(template, node[0][0][0])
|
|
self.prune()
|
|
|
|
self.n_yield_from = n_yield_from
|
|
|
|
if 3.2 <= version <= 3.4:
|
|
|
|
def n_call(node):
|
|
|
|
mapping = self._get_mapping(node)
|
|
key = node
|
|
for i in mapping[1:]:
|
|
key = key[i]
|
|
pass
|
|
if key.kind.startswith("CALL_FUNCTION_VAR_KW"):
|
|
# We may want to fill this in...
|
|
# But it is distinct from CALL_FUNCTION_VAR below
|
|
pass
|
|
elif key.kind.startswith("CALL_FUNCTION_VAR"):
|
|
# CALL_FUNCTION_VAR's top element of the stack contains
|
|
# the variable argument list, then comes
|
|
# annotation args, then keyword args.
|
|
# In the most least-top-most stack entry, but position 1
|
|
# in node order, the positional args.
|
|
argc = node[-1].attr
|
|
nargs = argc & 0xFF
|
|
kwargs = (argc >> 8) & 0xFF
|
|
# FIXME: handle annotation args
|
|
if kwargs != 0:
|
|
# kwargs == 0 is handled by the table entry
|
|
# Should probably handle it here though.
|
|
if nargs == 0:
|
|
template = ("%c(*%c, %C)", 0, -2, (1, kwargs + 1, ", "))
|
|
else:
|
|
template = (
|
|
"%c(%C, *%c, %C)",
|
|
0,
|
|
(1, nargs + 1, ", "),
|
|
-2,
|
|
(-2 - kwargs, -2, ", "),
|
|
)
|
|
self.template_engine(template, node)
|
|
self.prune()
|
|
else:
|
|
gen_function_parens_adjust(key, node)
|
|
self.default(node)
|
|
|
|
self.n_call = n_call
|
|
elif version < 3.2:
|
|
|
|
def n_call(node):
|
|
mapping = self._get_mapping(node)
|
|
key = node
|
|
for i in mapping[1:]:
|
|
key = key[i]
|
|
pass
|
|
gen_function_parens_adjust(key, node)
|
|
self.default(node)
|
|
|
|
self.n_call = n_call
|
|
|
|
def n_mkfunc_annotate(node):
|
|
|
|
# Handling EXTENDED_ARG before MAKE_FUNCTION ...
|
|
i = -1 if node[-2] == "EXTENDED_ARG" else 0
|
|
|
|
if self.version <= 3.2:
|
|
code = node[-2 + i]
|
|
elif self.version >= 3.3 or node[-2] == "kwargs":
|
|
# LOAD_CONST code object ..
|
|
# LOAD_CONST 'x0' if >= 3.3
|
|
# EXTENDED_ARG
|
|
# MAKE_FUNCTION ..
|
|
code = node[-3 + i]
|
|
elif node[-3] == "expr":
|
|
code = node[-3][0]
|
|
else:
|
|
# LOAD_CONST code object ..
|
|
# MAKE_FUNCTION ..
|
|
code = node[-3]
|
|
|
|
self.indent_more()
|
|
for annotate_last in range(len(node) - 1, -1, -1):
|
|
if node[annotate_last] == "annotate_tuple":
|
|
break
|
|
|
|
# FIXME: the real situation is that when derived from
|
|
# function_def_annotate we the name has been filled in.
|
|
# But when derived from funcdefdeco it hasn't Would like a better
|
|
# way to distinquish.
|
|
if self.f.getvalue()[-4:] == "def ":
|
|
self.write(code.attr.co_name)
|
|
|
|
# FIXME: handle and pass full annotate args
|
|
make_function3_annotate(
|
|
self, node, is_lambda=False, code_node=code, annotate_last=annotate_last
|
|
)
|
|
|
|
if len(self.param_stack) > 1:
|
|
self.write("\n\n")
|
|
else:
|
|
self.write("\n\n\n")
|
|
self.indent_less()
|
|
self.prune() # stop recursing
|
|
|
|
self.n_mkfunc_annotate = n_mkfunc_annotate
|
|
|
|
TABLE_DIRECT.update(
|
|
{
|
|
"tryelsestmtl3": (
|
|
"%|try:\n%+%c%-%c%|else:\n%+%c%-",
|
|
(1, "suite_stmts_opt"),
|
|
3, # "except_handler_else" or "except_handler"
|
|
(5, "else_suitel"),
|
|
),
|
|
"LOAD_CLASSDEREF": ("%{pattr}",),
|
|
}
|
|
)
|
|
if version >= 3.4:
|
|
#######################
|
|
# Python 3.4+ Changes #
|
|
#######################
|
|
TABLE_DIRECT.update(
|
|
{
|
|
"LOAD_CLASSDEREF": ("%{pattr}",),
|
|
"yield_from": ("yield from %c", (0, "expr")),
|
|
}
|
|
)
|
|
if version >= 3.5:
|
|
customize_for_version35(self, version)
|
|
if version >= 3.6:
|
|
customize_for_version36(self, version)
|
|
if version >= 3.7:
|
|
customize_for_version37(self, version)
|
|
if version >= 3.8:
|
|
customize_for_version38(self, version)
|
|
pass # version >= 3.8
|
|
pass # 3.7
|
|
pass # 3.6
|
|
pass # 3.5
|
|
pass # 3.4
|
|
return
|