Allow classes to be defined with empty parentheses. This means that
``class C(): pass`` is no longer a syntax error.
diff --git a/Python/compile.c b/Python/compile.c
index 16bf291..5781b21 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -4624,7 +4624,7 @@
char *name;
REQ(n, classdef);
- /* classdef: class NAME ['(' testlist ')'] ':' suite */
+ /* classdef: class NAME ['(' [testlist] ')'] ':' suite */
if ((v = PyString_InternFromString(STR(CHILD(n, 1)))) == NULL) {
c->c_errors++;
return;
@@ -4635,7 +4635,8 @@
com_push(c, 1);
Py_DECREF(v);
/* Push the tuple of base classes on the stack */
- if (TYPE(CHILD(n, 2)) != LPAR) {
+ if (TYPE(CHILD(n, 2)) != LPAR ||
+ TYPE(CHILD(n, 3)) == RPAR) {
com_addoparg(c, BUILD_TUPLE, 0);
com_push(c, 1);
}