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3.8 exception handling

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rocky
2019-04-11 12:09:24 -04:00
parent 94eff282f8
commit 5e1340a2fc
5 changed files with 42 additions and 9 deletions
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BIN
test/bytecode_3.8/04_try_finally.pyc Normal file
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40
uncompyle6/parsers/parse38.py
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@@ -29,6 +29,10 @@ class Python38Parser(Python37Parser):
stmt ::= forelsestmt38
stmt ::= forelselaststmt38
stmt ::= forelselaststmtl38
stmt ::= tryfinally38
# FIXME this should be restricted to being inside a try block
stmt ::= except_ret38
for38 ::= expr get_iter store for_block JUMP_BACK
for38 ::= expr for_iter store for_block JUMP_BACK
@@ -39,21 +43,38 @@ class Python38Parser(Python37Parser):
forelselaststmtl38 ::= expr for_iter store for_block POP_BLOCK else_suitel
whilestmt ::= testexpr l_stmts_opt COME_FROM JUMP_BACK POP_BLOCK
whilestmt ::= testexpr l_stmts_opt JUMP_BACK POP_BLOCK
whilestmt ::= testexpr returns POP_BLOCK
whilestmt ::= testexpr returns POP_BLOCK
while1elsestmt ::= l_stmts JUMP_BACK
whileelsestmt ::= testexpr l_stmts_opt JUMP_BACK POP_BLOCK
whileTruestmt ::= l_stmts_opt JUMP_BACK POP_BLOCK
whileelsestmt ::= testexpr l_stmts JUMP_BACK POP_BLOCK
whileTruestmt ::= l_stmts JUMP_BACK POP_BLOCK
while1stmt ::= l_stmts COME_FROM_LOOP
while1stmt ::= l_stmts COME_FROM JUMP_BACK COME_FROM_LOOP
while1elsestmt ::= l_stmts JUMP_BACK
whileTruestmt ::= l_stmts_opt JUMP_BACK NOP
whileTruestmt ::= l_stmts_opt JUMP_BACK POP_BLOCK NOP
whileTruestmt ::= l_stmts JUMP_BACK NOP
whileTruestmt ::= l_stmts JUMP_BACK POP_BLOCK NOP
for_block ::= l_stmts_opt _come_from_loops JUMP_BACK
except_cond1 ::= DUP_TOP expr COMPARE_OP jmp_false
POP_TOP POP_TOP POP_TOP
POP_EXCEPT
try_except ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
except_handler38
except_ret38 ::= SETUP_FINALLY expr ROT_FOUR POP_BLOCK POP_EXCEPT
CALL_FINALLY RETURN_VALUE COME_FROM_FINALLY
suite_stmts_opt END_FINALLY
except_handler38 ::= JUMP_FORWARD COME_FROM_FINALLY
except_stmts END_FINALLY opt_come_from_except
tryfinallystmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
BEGIN_FINALLY COME_FROM_FINALLY suite_stmts_opt
END_FINALLY
tryfinally38 ::= SETUP_FINALLY POP_BLOCK CALL_FINALLY
returns
COME_FROM_FINALLY END_FINALLY suite_stmts
tryfinally38 ::= SETUP_FINALLY POP_BLOCK CALL_FINALLY
returns
COME_FROM_FINALLY POP_FINALLY returns
END_FINALLY
"""
def __init__(self, debug_parser=PARSER_DEFAULT_DEBUG):
@@ -64,14 +85,23 @@ class Python38Parser(Python37Parser):
self.remove_rules("""
stmt ::= for
stmt ::= forelsestmt
stmt ::= try_except36
for ::= SETUP_LOOP expr for_iter store for_block POP_BLOCK
for ::= SETUP_LOOP expr for_iter store for_block POP_BLOCK NOP
for_block ::= l_stmts_opt COME_FROM_LOOP JUMP_BACK
forelsestmt ::= SETUP_LOOP expr for_iter store for_block POP_BLOCK else_suite
forelselaststmt ::= SETUP_LOOP expr for_iter store for_block POP_BLOCK else_suitec
forelselaststmtl ::= SETUP_LOOP expr for_iter store for_block POP_BLOCK else_suitel
try_except ::= SETUP_EXCEPT suite_stmts_opt POP_BLOCK
except_handler opt_come_from_except
tryfinallystmt ::= SETUP_FINALLY suite_stmts_opt POP_BLOCK
LOAD_CONST COME_FROM_FINALLY suite_stmts_opt
END_FINALLY
tryfinally36 ::= SETUP_FINALLY returns
COME_FROM_FINALLY suite_stmts_opt END_FINALLY
""")
super(Python37Parser, self).customize_grammar_rules(tokens, customize)

2
uncompyle6/scanners/scanner3.py
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@@ -872,7 +872,7 @@ class Scanner3(Scanner):
if_end = self.get_target(pre_rtarget)
# If the jump target is back, we are looping
if (if_end < pre_rtarget and
if (if_end < pre_rtarget and self.version < 3.8 and
(code[prev_op[if_end]] == self.opc.SETUP_LOOP)):
if (if_end > start):
return

6
uncompyle6/semantics/customize3.py
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@@ -938,7 +938,8 @@ def customize_for_version3(self, version):
#######################
# FIXME: pytest doesn't add proper keys in testing. Reinstate after we have fixed pytest.
# for lhs in 'for forelsestmt forelselaststmt forelselaststmtl'.split():
# for lhs in 'for forelsestmt forelselaststmt '
# 'forelselaststmtl tryfinally38'.split():
# del TABLE_DIRECT[lhs]
TABLE_DIRECT.update({
@@ -962,6 +963,9 @@ def customize_for_version3(self, version):
(2, 'store'),
(0, 'expr'),
(3, 'for_block'), -2 ),
'tryfinally38': ( '%|try:\n%+%c%-%|finally:\n%+%c%-\n\n',
(3, 'returns'), 6 ),
'except_ret38': ( '%|return %c\n', (1, 'expr') ),
})
pass
pass

3
uncompyle6/semantics/pysource.py
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@@ -1815,7 +1815,6 @@ class SourceWalker(GenericASTTraversal, object):
# except_cond3 is only in Python <= 2.6
n_except_cond3 = n_except_cond2
def template_engine(self, entry, startnode):
"""The format template interpetation engine. See the comment at the
beginning of this module for the how we interpret format
@@ -1862,7 +1861,7 @@ class SourceWalker(GenericASTTraversal, object):
if isinstance(index, tuple):
assert node[index[0]] == index[1], (
"at %s[%d], expected %s node; got %s" % (
node.kind, arg, node[index[0]].kind, index[1])
node.kind, arg, index[1], node[index[0]].kind)
)
index = index[0]
assert isinstance(index, int), (