Patch 8.2.4808
Problem:    Unused item in engine struct.
Solution:   Remove "expr".  Add comment with tags.
Files:      src/regexp.h


*** ../vim-8.2.4807/src/regexp.h        2022-03-27 20:04:16.025188554 +0100
--- src/regexp.h        2022-04-23 10:31:59.401873624 +0100
***************
*** 166,176 ****
  
  struct regengine
  {
      regprog_T *(*regcomp)(char_u*, int);
      void      (*regfree)(regprog_T *);
      int               (*regexec_nl)(regmatch_T *, char_u *, colnr_T, int);
      long      (*regexec_multi)(regmmatch_T *, win_T *, buf_T *, linenr_T, 
colnr_T, proftime_T *, int *);
!     char_u    *expr;
  };
  
  #endif        // _REGEXP_H
--- 166,180 ----
  
  struct regengine
  {
+     // bt_regcomp or nfa_regcomp
      regprog_T *(*regcomp)(char_u*, int);
+     // bt_regfree or nfa_regfree
      void      (*regfree)(regprog_T *);
+     // bt_regexec_nl or nfa_regexec_nl
      int               (*regexec_nl)(regmatch_T *, char_u *, colnr_T, int);
+     // bt_regexec_mult or nfa_regexec_mult
      long      (*regexec_multi)(regmmatch_T *, win_T *, buf_T *, linenr_T, 
colnr_T, proftime_T *, int *);
!     //char_u  *expr;
  };
  
  #endif        // _REGEXP_H
*** ../vim-8.2.4807/src/version.c       2022-04-22 22:45:47.036948588 +0100
--- src/version.c       2022-04-23 10:40:54.924771177 +0100
***************
*** 748,749 ****
--- 748,751 ----
  {   /* Add new patch number below this line */
+ /**/
+     4808,
  /**/

-- 
Change is inevitable, except from a vending machine.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///                                                                      \\\
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