tree bc6f0851c48e30bce36d872f7b390de8a01ddcc3
parent c89a3971e94c30611c885e4c440eae2fd9937948
author Christopher Ferris <cferris@google.com> 1540521705 -0700
committer Christopher Ferris <cferris@google.com> 1540593746 +0000

Fix handling of #elif.

When a construct like:

if defined(something)
  blocks1
elif 1
  blocks2
else
  blocks3
endif

The parser would put the first clause but then simply omit the elif and
put all of blocks2 without a terminating #endif. The code also did
something similar when the #else was an #endif.

Also convert all of the unit tests to real unit tests and only run
them if you run cpp.py by itself. Added new unit tests to cover the
new cases.

Test: Ran cpp.py unit tests.
Test: Reran update_all.py and verified nothing changed, and that running
Test: it on the new kernel headers that exposed this problem.
Change-Id: Ie168511303c4e15afdb60c37baef75a966ca29a8