Start to fold in 3.7 reduction-rule goodness into 3.6

uncompyle6/parsers/parse3.py

@@ -1490,7 +1490,7 @@ class Python3Parser(PythonParser):
                 #     print("XXX", first, last)
                 #     for t in range(first, last): print(tokens[t])
                 #     from trepan.api import debug; debug()
-                # return condition_jump.attr < condition_jump2.off2int()
+                return condition_jump.attr < condition_jump2.off2int()
             return False
         elif lhs == "ifelsestmt" and rule[1][2] == "jump_forward_else":
             last = min(last, len(tokens)-1)

uncompyle6/parsers/parse36.py

@@ -153,6 +153,16 @@ class Python36Parser(Python35Parser):
 
         """
 
+    # Some of this is duplicated from parse37. Eventually we'll probably rebase from
+    # that and then we can remove this.
+    def p_37conditionals(self, args):
+        """
+        expr                       ::= conditional37
+        conditional37              ::= expr expr jf_cfs expr COME_FROM
+        jf_cfs                     ::= JUMP_FORWARD _come_froms
+        ifelsestmt                 ::= testexpr c_stmts_opt jf_cfs else_suite opt_come_from_except
+        """
+
     def customize_grammar_rules(self, tokens, customize):
         # self.remove_rules("""
         # """)

uncompyle6/parsers/parse37.py

@@ -620,6 +620,8 @@ class Python37Parser(Python37BaseParser):
 
     def p_37conditionals(self, args):
         """
+        expr                       ::= conditional37
+        conditional37              ::= expr expr jf_cfs expr COME_FROM
         jf_cfs                     ::= JUMP_FORWARD _come_froms
         ifelsestmt                 ::= testexpr c_stmts_opt jf_cfs else_suite opt_come_from_except
 

uncompyle6/semantics/customize36.py

@@ -60,6 +60,12 @@ def customize_for_version36(self, version):
         'call_ex' : (
             '%c(%p)',
             (0, 'expr'), (1, 100)),
+
+        # This comes from 3.7. Eventually we will rebase from 3.7
+        # and then this can go away
+        "conditional37": ( "%p if %c else %c",
+                           (1, 'expr', 27), 0, 3 ),
+
         'store_annotation': (
             '%[1]{pattr}: %c',
             0

uncompyle6/semantics/customize37.py

@@ -120,6 +120,9 @@ def customize_for_version37(self, version):
                 (0, 19),
                 (6, 19),
             ),
+            'conditional37': ( '%p if %c else %c',
+                               (1, 'expr', 27), 0, 3 ),
+
             "except_return": ("%|except:\n%+%c%-", 3),
             "if_exp_37a": (
                 "%p if %p else %p",