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More detailed COME_FROMs

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For now we only add COME_FROM_FINALLY and COME_FROM_WITH
and even here only on 2.7
This commit is contained in:
rocky
2016-11-22 18:14:31 -05:00
parent f8917aaf88
commit 260ddedbfd
3 changed files with 16 additions and 10 deletions
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4
uncompyle6/parsers/parse2.py
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@@ -9,7 +9,7 @@ e.g. 5, myvariable, "for", etc. they are CPython Bytecode tokens,
e.g. "LOAD_CONST 5", "STORE NAME myvariable", "SETUP_LOOP", etc.
If we succeed in creating a parse tree, then we have a Python program
that a later phase can tern into a sequence of ASCII text.
that a later phase can turn into a sequence of ASCII text.
"""
from __future__ import print_function
@@ -336,7 +336,7 @@ class Python2Parser(PythonParser):
# always be the case.
self.add_unique_rules([
"stmt ::= tryfinallystmt_pypy",
"tryfinallystmt_pypy ::= SETUP_FINALLY suite_stmts_opt COME_FROM "
"tryfinallystmt_pypy ::= SETUP_FINALLY suite_stmts_opt COME_FROM_FINALLY "
"suite_stmts_opt END_FINALLY"
], customize)
continue

8
uncompyle6/parsers/parse27.py
View File

@@ -31,6 +31,10 @@ class Python27Parser(Python2Parser):
def p_try27(self, args):
"""
tryfinallystmt ::= SETUP_FINALLY suite_stmts_opt
POP_BLOCK LOAD_CONST
COME_FROM_FINALLY suite_stmts_opt END_FINALLY
tryelsestmt ::= SETUP_EXCEPT suite_stmts_opt POP_BLOCK
try_middle else_suite COME_FROM
@@ -77,11 +81,11 @@ class Python27Parser(Python2Parser):
assert2 ::= assert_expr jmp_true LOAD_ASSERT expr RAISE_VARARGS_2
withstmt ::= expr SETUP_WITH POP_TOP suite_stmts_opt
POP_BLOCK LOAD_CONST COME_FROM
POP_BLOCK LOAD_CONST COME_FROM_WITH
WITH_CLEANUP END_FINALLY
withasstmt ::= expr SETUP_WITH designator suite_stmts_opt
POP_BLOCK LOAD_CONST COME_FROM
POP_BLOCK LOAD_CONST COME_FROM_WITH
WITH_CLEANUP END_FINALLY
# Common with 2.6

14
uncompyle6/scanners/scanner2.py
View File

@@ -93,11 +93,6 @@ class Scanner2(scan.Scanner):
for instr in bytecode.get_instructions(co):
print(instr._disassemble())
# from xdis.bytecode import Bytecode
# bytecode = Bytecode(co, self.opc)
# for instr in bytecode.get_instructions(co):
# print(instr._disassemble())
# Container for tokens
tokens = []
@@ -166,8 +161,15 @@ class Scanner2(scan.Scanner):
# properly. For example, a "loop" with an "if" nested in it should have the
# "loop" tag last so the grammar rule matches that properly.
for jump_offset in sorted(jump_targets[offset], reverse=True):
come_from_name = 'COME_FROM'
opname = self.opc.opname[self.code[jump_offset]]
if opname.startswith('SETUP_') and self.version == 2.7:
come_from_type = opname[len('SETUP_'):]
if come_from_type not in ('LOOP', 'EXCEPT'):
come_from_name = 'COME_FROM_%s' % come_from_type
pass
tokens.append(Token(
'COME_FROM', None, repr(jump_offset),
come_from_name, None, repr(jump_offset),
offset="%s_%d" % (offset, jump_idx),
has_arg = True))
jump_idx += 1