g_syntax_t __REPB_PREFIX(syntax);

  /* Pointer to a fastmap, if any, otherwise zero.  re_search uses the
     fastmap, if there is one, to skip over impossible starting points
     for matches.  */
  char *__REPB_PREFIX(fastmap);

  /* Either a translate table to apply to all characters before
     comparing them, or zero for no translation.  The translation is
     applied to a pattern when it is compiled and to a string when it
     is matched.  */
  __RE_TRANSLATE_TYPE __REPB_PREFIX(translate);

  /* Number of subexpressions found by the compiler.  */
  size_t re_nsub;

  /* Zero if this pattern cannot match the empty string, one else.
     Well, in truth it's used only in 're_search_2', to see whether or
     not we should use the fastmap, so we don't set this absolutely
     perfectly; see 're_compile_fastmap' (the "duplicate" case).  */
  unsigned __REPB_PREFIX(can_be_null) : 1;

  /* If REGS_UNALLOCATED, allocate space in the 'regs' structure
     for 'max (RE_NREGS, re_nsub + 1)' groups.
     If REGS_REALLOCATE, reallocate space if necessary.
     If REGS_FIXED, use what's there.  */
#ifdef __USE_GNU
# define REGS_UNALLOCATED 0
# define REGS_REALLOCATE 1
# define REGS_FIXED 2
#endif
  unsigned __REPB_PREFIX(regs_allocated) : 2;

  /* Set to zero when 're_compile_pattern' compiles a pattern; set to
     one by 're_compile_fastmap' if it updates the fastmap.  */
  unsigned __REPB_PREFIX(fastmap_accurate) : 1;

  /* If set, 're_match_2' does not return information about
     subexpressions.  */
  unsigned __REPB_PREFIX(no_sub) : 1;

  /* If set, a beginning-of-line anchor doesn't match at the beginning
     of the string.  */
  unsigned __REPB_PREFIX(not_bol) : 1;

  /* Similarly for an end-of-line anchor.  */
  unsigned __REPB_PREFIX(not_eol) : 1;

  /* If true, an anchor at a newline matches.  */
  unsigned __REPB_PREFIX(newline_anchor) : 1;
};

typedef struct re_pattern_buffer regex_t;