# SUSPEND BRANCHJ, off 1 V 1 ; "Independent" sub-RE.
# IFTHEN BRANCHJ, off 1 V 1 ; Switch, should be preceded by switcher.
# GROUPP GROUPP, num 1 ; Whether the group matched.
+#
+# If we were to start running out of regnodes, many of the ones that are
+# complements could be combined with their non-complement mates. For example,
+# POSIXU could have the flags field have the bottom bit mean do we complement
+# or not, and the type be shifted left 1 bit. Then all that would be needed to
+# extract which to do is a mask for the complement bit, and a right shift for
+# the other, an inconsequential increase in instructions. It might actually be
+# clearer and slightly faster given the case statement and assignment are
+# removed. Note that not everything could be collapsed: NPOSIXA, for example,
+# would require special handling for performance.
#* Exit points