Patch 8.2.4869
Problem:    Expression in command block does not look after NL.
Solution:   Skip over NL to check what follows. (closes #10358)
Files:      src/eval.c, src/proto/eval.pro, src/vim9script.c,
            src/testdir/test_usercommands.vim


*** ../vim-8.2.4868/src/eval.c  2022-04-29 21:14:58.341192079 +0100
--- src/eval.c  2022-05-05 12:14:25.911560323 +0100
***************
*** 1803,1809 ****
      int               i;
  
      for (i = 0; i < fi->fi_break_count; ++i)
!       eval_next_line(evalarg);
  }
  
  /*
--- 1803,1809 ----
      int               i;
  
      for (i = 0; i < fi->fi_break_count; ++i)
!       eval_next_line(NULL, evalarg);
  }
  
  /*
***************
*** 2153,2159 ****
        p = skipwhite(next);
        if (*p != NUL && !vim9_comment_start(p))
            return next;
!       if (eval_next_line(evalarg) == NULL)
            break;
      }
      return NULL;
--- 2153,2159 ----
        p = skipwhite(next);
        if (*p != NUL && !vim9_comment_start(p))
            return next;
!       if (eval_next_line(NULL, evalarg) == NULL)
            break;
      }
      return NULL;
***************
*** 2176,2186 ****
      if (in_vim9script()
            && evalarg != NULL
            && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)
!           && (*p == NUL || (vim9_comment_start(p) && VIM_ISWHITE(p[-1]))))
      {
        char_u *next;
  
!       if (evalarg->eval_cookie != NULL)
            next = getline_peek_skip_comments(evalarg);
        else
            next = peek_next_line_from_context(evalarg->eval_cctx);
--- 2176,2189 ----
      if (in_vim9script()
            && evalarg != NULL
            && (evalarg->eval_cookie != NULL || evalarg->eval_cctx != NULL)
!           && (*p == NUL || *p == NL
!                            || (vim9_comment_start(p) && VIM_ISWHITE(p[-1]))))
      {
        char_u *next;
  
!       if (*p == NL)
!           next = p + 1;
!       else if (evalarg->eval_cookie != NULL)
            next = getline_peek_skip_comments(evalarg);
        else
            next = peek_next_line_from_context(evalarg->eval_cctx);
***************
*** 2199,2209 ****
   * Only called for Vim9 script.
   */
      char_u *
! eval_next_line(evalarg_T *evalarg)
  {
      garray_T  *gap = &evalarg->eval_ga;
      char_u    *line;
  
      if (evalarg->eval_cookie != NULL)
        line = evalarg->eval_getline(0, evalarg->eval_cookie, 0,
                                                           GETLINE_CONCAT_ALL);
--- 2202,2215 ----
   * Only called for Vim9 script.
   */
      char_u *
! eval_next_line(char_u *arg, evalarg_T *evalarg)
  {
      garray_T  *gap = &evalarg->eval_ga;
      char_u    *line;
  
+     if (arg != NULL && *arg == NL)
+       return skipwhite(arg + 1);
+ 
      if (evalarg->eval_cookie != NULL)
        line = evalarg->eval_getline(0, evalarg->eval_cookie, 0,
                                                           GETLINE_CONCAT_ALL);
***************
*** 2253,2259 ****
        return skipwhite(arg);
      eval_next_non_blank(p, evalarg, &getnext);
      if (getnext)
!       return eval_next_line(evalarg);
      return p;
  }
  
--- 2259,2265 ----
        return skipwhite(arg);
      eval_next_non_blank(p, evalarg, &getnext);
      if (getnext)
!       return eval_next_line(arg, evalarg);
      return p;
  }
  
***************
*** 2449,2455 ****
        evaluate = evalarg_used->eval_flags & EVAL_EVALUATE;
  
        if (getnext)
!           *arg = eval_next_line(evalarg_used);
        else
        {
            if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
--- 2455,2461 ----
        evaluate = evalarg_used->eval_flags & EVAL_EVALUATE;
  
        if (getnext)
!           *arg = eval_next_line(*arg, evalarg_used);
        else
        {
            if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
***************
*** 2515,2521 ****
                return FAIL;
            }
            if (getnext)
!               *arg = eval_next_line(evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
--- 2521,2527 ----
                return FAIL;
            }
            if (getnext)
!               *arg = eval_next_line(*arg, evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
***************
*** 2621,2627 ****
        while (p[0] == '|' && p[1] == '|')
        {
            if (getnext)
!               *arg = eval_next_line(evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
--- 2627,2633 ----
        while (p[0] == '|' && p[1] == '|')
        {
            if (getnext)
!               *arg = eval_next_line(*arg, evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
***************
*** 2747,2753 ****
        while (p[0] == '&' && p[1] == '&')
        {
            if (getnext)
!               *arg = eval_next_line(evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
--- 2753,2759 ----
        while (p[0] == '&' && p[1] == '&')
        {
            if (getnext)
!               *arg = eval_next_line(*arg, evalarg_used);
            else
            {
                if (evaluate && vim9script && !VIM_ISWHITE(p[-1]))
***************
*** 2864,2870 ****
  
        if (getnext)
        {
!           *arg = eval_next_line(evalarg);
            p = *arg;
        }
        else if (evaluate && vim9script && !VIM_ISWHITE(**arg))
--- 2870,2876 ----
  
        if (getnext)
        {
!           *arg = eval_next_line(*arg, evalarg);
            p = *arg;
        }
        else if (evaluate && vim9script && !VIM_ISWHITE(**arg))
***************
*** 3026,3032 ****
        evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
        oplen = (concat && p[1] == '.') ? 2 : 1;
        if (getnext)
!           *arg = eval_next_line(evalarg);
        else
        {
            if (evaluate && vim9script && !VIM_ISWHITE(**arg))
--- 3032,3038 ----
        evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
        oplen = (concat && p[1] == '.') ? 2 : 1;
        if (getnext)
!           *arg = eval_next_line(*arg, evalarg);
        else
        {
            if (evaluate && vim9script && !VIM_ISWHITE(**arg))
***************
*** 3258,3264 ****
  
        evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
        if (getnext)
!           *arg = eval_next_line(evalarg);
        else
        {
            if (evaluate && in_vim9script() && !VIM_ISWHITE(**arg))
--- 3264,3270 ----
  
        evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
        if (getnext)
!           *arg = eval_next_line(*arg, evalarg);
        else
        {
            if (evaluate && in_vim9script() && !VIM_ISWHITE(**arg))
***************
*** 6150,6156 ****
                        || ASCII_ISALPHA(in_vim9script() ? *skipwhite(p + 2)
                                                                    : p[2])))))
        {
!           *arg = eval_next_line(evalarg);
            p = *arg;
            check_white = FALSE;
        }
--- 6156,6162 ----
                        || ASCII_ISALPHA(in_vim9script() ? *skipwhite(p + 2)
                                                                    : p[2])))))
        {
!           *arg = eval_next_line(*arg, evalarg);
            p = *arg;
            check_white = FALSE;
        }
*** ../vim-8.2.4868/src/proto/eval.pro  2022-03-08 13:18:10.809020782 +0000
--- src/proto/eval.pro  2022-05-05 12:14:07.771579952 +0100
***************
*** 32,38 ****
  void set_context_for_expression(expand_T *xp, char_u *arg, cmdidx_T cmdidx);
  int pattern_match(char_u *pat, char_u *text, int ic);
  char_u *eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext);
! char_u *eval_next_line(evalarg_T *evalarg);
  char_u *skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg);
  void init_evalarg(evalarg_T *evalarg);
  void clear_evalarg(evalarg_T *evalarg, exarg_T *eap);
--- 32,38 ----
  void set_context_for_expression(expand_T *xp, char_u *arg, cmdidx_T cmdidx);
  int pattern_match(char_u *pat, char_u *text, int ic);
  char_u *eval_next_non_blank(char_u *arg, evalarg_T *evalarg, int *getnext);
! char_u *eval_next_line(char_u *arg, evalarg_T *evalarg);
  char_u *skipwhite_and_linebreak(char_u *arg, evalarg_T *evalarg);
  void init_evalarg(evalarg_T *evalarg);
  void clear_evalarg(evalarg_T *evalarg, exarg_T *eap);
*** ../vim-8.2.4868/src/vim9script.c    2022-04-24 21:54:56.061612118 +0100
--- src/vim9script.c    2022-05-05 12:13:57.851590827 +0100
***************
*** 589,595 ****
        char_u *p;
  
        if (getnext)
!           arg = eval_next_line(evalarg);
        else
            arg = nextarg;
  
--- 589,595 ----
        char_u *p;
  
        if (getnext)
!           arg = eval_next_line(expr_end, evalarg);
        else
            arg = nextarg;
  
*** ../vim-8.2.4868/src/testdir/test_usercommands.vim   2022-03-23 
21:36:23.713441139 +0000
--- src/testdir/test_usercommands.vim   2022-05-05 12:17:05.647399991 +0100
***************
*** 695,700 ****
--- 695,714 ----
    delcommand HelloThere
  
    let lines =<< trim END
+       command EchoCond {
+           const test: string = true
+               ? 'true'
+               : 'false'
+           g:result = test
+       }
+       EchoCond
+   END
+   call v9.CheckScriptSuccess(lines)
+   call assert_equal('true', g:result)
+   delcommand EchoCond
+   unlet g:result
+ 
+   let lines =<< trim END
        command BadCommand {
           echo  {
           'key': 'value',
*** ../vim-8.2.4868/src/version.c       2022-05-04 22:12:34.125942208 +0100
--- src/version.c       2022-05-05 12:18:43.515311131 +0100
***************
*** 748,749 ****
--- 748,751 ----
  {   /* Add new patch number below this line */
+ /**/
+     4869,
  /**/

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