I banged on the code (beyond what's in that branch) to make fewer tests fail;
the only tests that fail now are:
test_descr -- can't pickle ints?!
test_pickletools -- ???
test_socket -- See python.org/sf/1619659
test_sqlite -- ???
I'll deal with those later.
Rewrote Py_RETURN_{NONE, TRUE, FALSE} to expand to comma expressions
rather than "do {} while(0)" thingies. The OP complained because he
likes using MS /W4 sometimes, and then all his uses of these things
generate nuisance warnings about testing a constant expression (in
the "while(0)" part). Comma expressions don't have this problem
(although it's a lucky accident that comma expressions suffice for these
macros!).
Guido van Rossum
Tim Peters
Brett Cannon
Mark Hammond
Martin v. Löwis