anoncode anonymous subroutine ck_anoncode $
prototype subroutine prototype ck_null s% S
refgen reference constructor ck_spair m1 L
-srefgen scalar ref constructor ck_null fs1 S
+srefgen single ref constructor ck_null fs1 S
ref reference-type operator ck_fun stu% S?
bless bless ck_fun s@ S S?