Fix 3.6 async parsing

test/stdlib/3.6-exclude.sh

@@ -12,7 +12,6 @@ SKIP_TESTS=(
     [test_aifc.py]=1  #
     [test_argparse.py]=1 # it fails on its own
     [test_asdl_parser.py]=1 # it fails on its own
-    [test_asyncgen.py]=1  # parse error
     [test_atexit.py]=1  # The atexit test looks for specific comments in error lines
 
     [test_baseexception.py]=1 # test assert error
@@ -39,9 +38,9 @@ SKIP_TESTS=(
     [test_collections.py]= # it fails on its own
     [test_compile.py]=1  # Code introspects on co_consts in a non-decompilable way
     [test_concurrent_futures.py]=1 # Takes long
-    [test_contextlib.py]=1 # test assertion failure
-    [test_contextlib_async.py]=1 # Investigate
-    [test_coroutines.py]=1 # parse error
+
+    [test_coroutines.py]=1 # FIXME: async parse error
+
     [test_curses.py]=1 # Parse error
     [test_ctypes.py]=1 # it fails on its own
 

uncompyle6/parsers/parse36.py

@@ -29,7 +29,13 @@ class Python36Parser(Python35Parser):
         self.customized = {}
 
 
-    def p_36misc(self, args):
+    def p_jump_36(self, args):
+        """
+        # Zero or one COME_FROM
+        # And/or expressions have this
+        come_from_opt ::= COME_FROM?
+        """
+    def p_misc_36(self, args):
         """sstmt ::= sstmt RETURN_LAST
 
         # long except clauses in a loop can sometimes cause a JUMP_BACK to turn into a
@@ -67,6 +73,33 @@ class Python36Parser(Python35Parser):
 
         if_exp ::= expr jmp_false expr jf_cf expr COME_FROM
 
+        async_for_stmt36   ::= SETUP_LOOP expr
+                               GET_AITER
+                               LOAD_CONST YIELD_FROM
+                               SETUP_EXCEPT GET_ANEXT LOAD_CONST
+                               YIELD_FROM
+                               store
+                               POP_BLOCK JUMP_BACK COME_FROM_EXCEPT DUP_TOP
+                               LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
+                               END_FINALLY for_block
+                               COME_FROM
+                               POP_TOP POP_TOP POP_TOP POP_EXCEPT POP_TOP POP_BLOCK
+                               COME_FROM_LOOP
+
+        async_for_stmt36   ::= SETUP_LOOP expr
+                               GET_AITER
+                               LOAD_CONST YIELD_FROM SETUP_EXCEPT GET_ANEXT LOAD_CONST
+                               YIELD_FROM
+                               store
+                               POP_BLOCK JUMP_FORWARD COME_FROM_EXCEPT DUP_TOP
+                               LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
+                               END_FINALLY
+                               COME_FROM
+                               for_block
+                               COME_FROM
+                               POP_TOP POP_TOP POP_TOP POP_EXCEPT POP_TOP POP_BLOCK
+                               COME_FROM_LOOP
+
         async_for_stmt     ::= SETUP_LOOP expr
                                GET_AITER
                                LOAD_CONST YIELD_FROM SETUP_EXCEPT GET_ANEXT LOAD_CONST
@@ -81,20 +114,6 @@ class Python36Parser(Python35Parser):
 
         stmt      ::= async_for_stmt36
 
-        async_for_stmt36   ::= SETUP_LOOP expr
-                               GET_AITER
-                               LOAD_CONST YIELD_FROM
-                               SETUP_EXCEPT GET_ANEXT LOAD_CONST
-                               YIELD_FROM
-                               store
-                               POP_BLOCK JUMP_BACK COME_FROM_EXCEPT DUP_TOP
-                               LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
-                               END_FINALLY for_block
-                               COME_FROM
-                               POP_TOP POP_TOP POP_TOP POP_EXCEPT
-                               POP_TOP POP_BLOCK
-                               COME_FROM_LOOP
-
         async_forelse_stmt ::= SETUP_LOOP expr
                                GET_AITER
                                LOAD_CONST YIELD_FROM SETUP_EXCEPT GET_ANEXT LOAD_CONST

uncompyle6/semantics/customize35.py

@@ -28,6 +28,7 @@ from uncompyle6.semantics.helper import flatten_list, gen_function_parens_adjust
 # Python 3.5+ Changes #
 #######################
 def customize_for_version35(self, version):
+    # fmt: off
     TABLE_DIRECT.update(
         {
             # nested await expressions like:
@@ -36,15 +37,24 @@ def customize_for_version35(self, version):
             "await_expr": ("await %p", (0, PRECEDENCE["await_expr"]-1)),
 
             "await_stmt": ("%|%c\n", 0),
-            "async_for_stmt": ("%|async for %c in %c:\n%+%|%c%-\n\n", 9, 1, 25),
+            "async_for_stmt": (
+                "%|async for %c in %c:\n%+%|%c%-\n\n",
+                (9, "store"),
+                (1, "expr"),
+                (25, "for_block"),
+            ),
             "async_forelse_stmt": (
                 "%|async for %c in %c:\n%+%c%-%|else:\n%+%c%-\n\n",
-                9,
-                1,
-                25,
+                (9, "store"),
+                (1, "expr"),
+                (25, "for_block"),
                 (27, "else_suite"),
             ),
-            "async_with_stmt": ("%|async with %c:\n%+%c%-", (0, "expr"), 3),
+            "async_with_stmt": (
+                "%|async with %c:\n%+%c%-",
+                (0, "expr"),
+                3
+            ),
             "async_with_as_stmt": (
                 "%|async with %c as %c:\n%+%c%-",
                 (0, "expr"),
@@ -55,6 +65,7 @@ def customize_for_version35(self, version):
             # "unmapexpr":	       ( "{**%c}", 0), # done by n_unmapexpr
         }
     )
+    # fmt: on
 
     def async_call(node):
         self.f.write("async ")

uncompyle6/semantics/customize36.py

@@ -61,7 +61,7 @@ def customize_for_version36(self, version):
                 "%|async for %c in %c:\n%+%c%-\n\n",
                 (9, "store"),
                 (1, "expr"),
-                (18, "for_block"),
+                (-9, "for_block"),  # Count from end, since COME_FROM shifts things in the forward direction
             ),
             "call_ex":            ("%c(%p)", (0, "expr"), (1, 100)),
             "except_return":      ("%|except:\n%+%c%-", 3),