REGS_UNALLOCATED  453 lib/regex.h    # define REGS_UNALLOCATED 0
REGS_UNALLOCATED  849 src/regex-emacs.c enum { REGS_UNALLOCATED, REGS_REALLOCATE, REGS_FIXED };
REGS_UNALLOCATED  376 test/manual/etags/c-src/emacs/src/regex.h #define REGS_UNALLOCATED 0