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fixes 151

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rocky 2018-01-29 01:05:22 -05:00
parent 5edcc7c2eb
commit 5039a71846
4 changed files with 16 additions and 3 deletions
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test/bytecode_2.7/05_while_if_continue.pyc Normal file
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11
test/simple_source/bug27+/05_while_if_continue.py Normal file
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@ -0,0 +1,11 @@
# Issue 151 for Python 2.7
# Bug was two-fold. Not having a rile for a while loop with an ending return statement
# and allowing iflastsmtl to have an optional c_stmt which allowed the "if" to get
# comined into the "while". A separate analysis for control flow should make this
# simpiler.
def func(a, b, c):
while a:
if b:
continue
return False
return True

2
uncompyle6/parser.py
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@ -323,7 +323,7 @@ class PythonParser(GenericASTBuilder):
stmt ::= return
return ::= ret_expr RETURN_VALUE
# returns are a sequence of statements that ends in a RETURN statement.
# "returns" nonterminal is a sequence of statements that ends in a RETURN statement.
# In later Python versions with jump optimization, this can cause JUMPs
# that would normally appear to be omitted.

6
uncompyle6/parsers/parse27.py
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@ -64,9 +64,9 @@ class Python27Parser(Python2Parser):
def p_jump27(self, args):
"""
iflaststmtl ::= testexpr c_stmts_opt
iflaststmtl ::= testexpr c_stmts
_ifstmts_jump ::= c_stmts_opt JUMP_FORWARD come_froms
_ifstmts_jump ::= c_stmts_opt JUMP_FORWARD come_froms
bp_come_from ::= POP_BLOCK COME_FROM
# FIXME: Common with 3.0+
@ -119,6 +119,8 @@ class Python27Parser(Python2Parser):
POP_BLOCK LOAD_CONST COME_FROM_WITH
WITH_CLEANUP END_FINALLY
whilestmt ::= SETUP_LOOP testexpr returns POP_BLOCK COME_FROM
while1stmt ::= SETUP_LOOP returns bp_come_from
while1stmt ::= SETUP_LOOP l_stmts_opt JUMP_BACK POP_BLOCK COME_FROM
whilestmt ::= SETUP_LOOP testexpr l_stmts_opt JUMP_BACK POP_BLOCK _come_froms