op_reg_common.h: Continue refactoring

The new op_reg_common.h did not have in it all the things that made
sense for it to have, including some comment changes that I should have
made when I created it.

I also realized the the new mechanism of using shifts allowed
RXf_PMf_STD_PMMOD_SHIFT to actually control things, rather than be a
 #define that one had to remember to change if those things changed
independently.

Finally, I created a check so that adding bits without adding them to
RXf_PMf_COMPILETIME will force a compilation error.  (This came from the
school of hard knocks)

1 files changed, 0 insertions, 3 deletions

diff --git a/op.h b/op.h
index d00f74ff28..6bf996d9da 100644
--- a/op.h
+++ b/op.h
@@ -396,9 +396,6 @@ struct pmop {
 #   error Too many PMf_ bits used.  See above and regnodes.h for any spare in middle
 #endif
 
-/* mask of bits that need to be transfered to re->extflags */
-#define PMf_COMPILETIME	(PMf_MULTILINE|PMf_SINGLELINE|PMf_LOCALE|PMf_FOLD|PMf_EXTENDED|PMf_KEEPCOPY)
-
 #ifdef USE_ITHREADS
 
 #  define PmopSTASHPV(o)						\