#*Regex Subroutines
GOSUB GOSUB, num/ofs 2L ; recurse to paren arg1 at (signed) ofs arg2
-GOSTART GOSTART, no ; recurse to start of pattern
#*Special conditionals
NGROUPP NGROUPP, no-sv 1 ; Whether the group matched.
#
#
TRIE next:FAIL
-EVAL AB:FAIL
+EVAL B,postponed_AB:FAIL
CURLYX end:FAIL
WHILEM A_pre,A_min,A_max,B_min,B_max:FAIL
BRANCH next:FAIL