Python 3.6 CALL_FUNCTION_EX first attempt

test/simple_source/bug36/01_call_function.py

@@ -0,0 +1,5 @@
+# Python 3.6's changes for calling functions.
+# See https://github.com/rocky/python-uncompyle6/issues/58
+# CALL_FUNCTION_EX takes 2 to 3 arguments on the stack: the function, the tuple of positional arguments,
+# and optionally the dict of keyword arguments if bit 0 of oparg is 1.
+a(*[])

uncompyle6/parsers/parse36.py

@@ -26,12 +26,16 @@ class Python36Parser(Python35Parser):
 
         withstmt ::= expr SETUP_WITH POP_TOP suite_stmts_opt POP_BLOCK LOAD_CONST
                      WITH_CLEANUP_START WITH_CLEANUP_FINISH END_FINALLY
+
+        call_function ::= expr expr CALL_FUNCTION_EX
+        call_function ::= expr expr expr CALL_FUNCTION_EX_KW
         """
 
     def add_custom_rules(self, tokens, customize):
         super(Python36Parser, self).add_custom_rules(tokens, customize)
         for i, token in enumerate(tokens):
             opname = token.type
+
             if opname == 'FORMAT_VALUE':
                 rules_str = """
                     expr ::= fstring_single

uncompyle6/scanners/scanner36.py

@@ -1,8 +1,8 @@
 #  Copyright (c) 2016 by Rocky Bernstein
 """
-Python 3.5 bytecode scanner/deparser
+Python 3.6 bytecode scanner/deparser
 
-This sets up opcodes Python's 3.5 and calls a generalized
+This sets up opcodes Python's 3.6 and calls a generalized
 scanner routine for Python 3.
 """
 
@@ -19,6 +19,18 @@ class Scanner36(Scanner3):
     def __init__(self, show_asm=None):
         Scanner3.__init__(self, 3.6, show_asm)
         return
+
+    def ingest(self, co, classname=None, code_objects={}, show_asm=None):
+        tokens, customize = Scanner3.ingest(self, co, classname, code_objects, show_asm)
+        for t in tokens:
+            # The lowest bit of flags indicates whether the
+            # var-keyword argument is placed at the top of the stack
+            if t.op == self.opc.CALL_FUNCTION_EX and t.attr & 1:
+                t.type = 'CALL_FUNCTION_EX_KW'
+                pass
+            pass
+        return tokens, customize
+
     pass
 
 if __name__ == "__main__":

uncompyle6/semantics/pysource.py

@@ -393,7 +393,11 @@ class SourceWalker(GenericASTTraversal, object):
                         'fstring_multi':  ( "f'%c'", 0),
                         'func_args36':    ( "%c(**", 0),
                     })
-
+                    TABLE_R.update({
+                        'CALL_FUNCTION_EX': ('%c(*%P)', 0, (1, 2, ', ', 100)),
+                        # Not quite right
+                        'CALL_FUNCTION_EX_KW': ('%c%c *%c', 0, 1, 2)
+                        })
                     FSTRING_CONVERSION_MAP = {1: '!s', 2: '!r', 3: '!a'}
 
                     def f_conversion(node):
@@ -1698,6 +1702,7 @@ class SourceWalker(GenericASTTraversal, object):
                 self.prec = p
                 arg += 1
             elif typ == 'C':
+                try:
                     low, high, sep = entry[arg]
                     remaining = len(node[low:high])
                     for subnode in node[low:high]:
@@ -1705,7 +1710,12 @@ class SourceWalker(GenericASTTraversal, object):
                         remaining -= 1
                         if remaining > 0:
                             self.write(sep)
+                            pass
+                        pass
                     arg += 1
+                except:
+                    from trepan.api import debug; debug()
+                    pass
             elif typ == 'D':
                 low, high, sep = entry[arg]
                 remaining = len(node[low:high])