Patch 8.2.2298
Problem:    Vim9: comment right after "(" of function not recognized.
Solution:   Do not skip over white space before calling get_function_args().
            (closes #7613)
Files:      src/userfunc.c, src/proto/userfunc.pro,
            src/testdir/test_vim9_func.vim


*** ../vim-8.2.2297/src/userfunc.c      2021-01-01 19:17:52.293976798 +0100
--- src/userfunc.c      2021-01-04 14:07:55.894111391 +0100
***************
*** 154,162 ****
  
  /*
   * Get function arguments.
   * "argp" is advanced just after "endchar".
   */
!     int
  get_function_args(
      char_u    **argp,
      char_u    endchar,
--- 154,163 ----
  
  /*
   * Get function arguments.
+  * "argp" should point to just after the "(", possibly to white space.
   * "argp" is advanced just after "endchar".
   */
!     static int
  get_function_args(
      char_u    **argp,
      char_u    endchar,
***************
*** 170,181 ****
      char_u    **line_to_free)
  {
      int               mustend = FALSE;
!     char_u    *arg = *argp;
!     char_u    *p = arg;
      int               c;
      int               any_default = FALSE;
      char_u    *expr;
!     char_u    *whitep = arg;
  
      if (newargs != NULL)
        ga_init2(newargs, (int)sizeof(char_u *), 3);
--- 171,182 ----
      char_u    **line_to_free)
  {
      int               mustend = FALSE;
!     char_u    *arg;
!     char_u    *p;
      int               c;
      int               any_default = FALSE;
      char_u    *expr;
!     char_u    *whitep = *argp;
  
      if (newargs != NULL)
        ga_init2(newargs, (int)sizeof(char_u *), 3);
***************
*** 190,195 ****
--- 191,198 ----
      /*
       * Isolate the arguments: "arg1, arg2, ...)"
       */
+     arg = skipwhite(*argp);
+     p = arg;
      while (*p != endchar)
      {
        while (eap != NULL && eap->getline != NULL
***************
*** 548,554 ****
  
      // First, check if this is really a lambda expression. "->" or "=>" must
      // be found after the arguments.
!     s = skipwhite(*arg + 1);
      ret = get_function_args(&s, equal_arrow ? ')' : '-', NULL,
            types_optional ? &argtypes : NULL, types_optional,
                                                 NULL, NULL, TRUE, NULL, NULL);
--- 551,557 ----
  
      // First, check if this is really a lambda expression. "->" or "=>" must
      // be found after the arguments.
!     s = *arg + 1;
      ret = get_function_args(&s, equal_arrow ? ')' : '-', NULL,
            types_optional ? &argtypes : NULL, types_optional,
                                                 NULL, NULL, TRUE, NULL, NULL);
***************
*** 564,570 ****
        pnewargs = &newargs;
      else
        pnewargs = NULL;
!     *arg = skipwhite(*arg + 1);
      ret = get_function_args(arg, equal_arrow ? ')' : '-', pnewargs,
            types_optional ? &argtypes : NULL, types_optional,
                                            &varargs, NULL, FALSE, NULL, NULL);
--- 567,573 ----
        pnewargs = &newargs;
      else
        pnewargs = NULL;
!     *arg += 1;
      ret = get_function_args(arg, equal_arrow ? ')' : '-', pnewargs,
            types_optional ? &argtypes : NULL, types_optional,
                                            &varargs, NULL, FALSE, NULL, NULL);
***************
*** 2964,2969 ****
--- 2967,2973 ----
      int               is_global = FALSE;
      char_u    *p;
      char_u    *arg;
+     char_u    *whitep;
      char_u    *line_arg = NULL;
      garray_T  newargs;
      garray_T  argtypes;
***************
*** 3159,3165 ****
        if (vim_strchr(p, '(') != NULL)
            p = vim_strchr(p, '(');
      }
-     p = skipwhite(p + 1);
  
      // In Vim9 script only global functions can be redefined.
      if (vim9script && eap->forceit && !is_global)
--- 3163,3168 ----
***************
*** 3199,3209 ****
--- 3202,3214 ----
  
      // This may get more lines and make the pointers into the first line
      // invalid.
+     ++p;
      if (get_function_args(&p, ')', &newargs,
                        eap->cmdidx == CMD_def ? &argtypes : NULL, FALSE,
                         &varargs, &default_args, eap->skip,
                         eap, &line_to_free) == FAIL)
        goto errret_2;
+     whitep = p;
  
      if (eap->cmdidx == CMD_def)
      {
***************
*** 3215,3220 ****
--- 3220,3226 ----
            if (p > ret_type)
            {
                ret_type = vim_strnsave(ret_type, p - ret_type);
+               whitep = p;
                p = skipwhite(p);
            }
            else
***************
*** 3229,3234 ****
--- 3235,3241 ----
        // find extra arguments "range", "dict", "abort" and "closure"
        for (;;)
        {
+           whitep = p;
            p = skipwhite(p);
            if (STRNCMP(p, "range", 5) == 0)
            {
***************
*** 3267,3273 ****
      else if (*p != NUL
            && !(*p == '"' && (!vim9script || eap->cmdidx == CMD_function)
                                                     && eap->cmdidx != CMD_def)
!           && !(*p == '#' && (vim9script || eap->cmdidx == CMD_def))
            && !eap->skip
            && !did_emsg)
        semsg(_(e_trailing_arg), p);
--- 3274,3281 ----
      else if (*p != NUL
            && !(*p == '"' && (!vim9script || eap->cmdidx == CMD_function)
                                                     && eap->cmdidx != CMD_def)
!           && !(VIM_ISWHITE(*whitep) && *p == '#'
!                                    && (vim9script || eap->cmdidx == CMD_def))
            && !eap->skip
            && !did_emsg)
        semsg(_(e_trailing_arg), p);
*** ../vim-8.2.2297/src/proto/userfunc.pro      2020-12-22 17:35:50.043978116 
+0100
--- src/proto/userfunc.pro      2021-01-04 13:55:31.112146408 +0100
***************
*** 1,7 ****
  /* userfunc.c */
  void func_init(void);
  hashtab_T *func_tbl_get(void);
- int get_function_args(char_u **argp, char_u endchar, garray_T *newargs, 
garray_T *argtypes, int types_optional, int *varargs, garray_T *default_args, 
int skip, exarg_T *eap, char_u **line_to_free);
  char_u *get_lambda_name(void);
  char_u *register_cfunc(cfunc_T cb, cfunc_free_T cb_free, void *state);
  int get_lambda_tv(char_u **arg, typval_T *rettv, int types_optional, 
evalarg_T *evalarg);
--- 1,6 ----
*** ../vim-8.2.2297/src/testdir/test_vim9_func.vim      2021-01-03 
13:09:48.226390595 +0100
--- src/testdir/test_vim9_func.vim      2021-01-04 14:08:48.829951149 +0100
***************
*** 241,246 ****
--- 241,282 ----
    delfunc g:Func
  enddef
  
+ def FuncWithComment(  # comment
+   a: number, #comment
+   b: bool, # comment
+   c: string) #comment
+   assert_equal(4, a)
+   assert_equal(true, b)
+   assert_equal('yes', c)
+ enddef
+ 
+ def Test_func_with_comments()
+   FuncWithComment(4, true, 'yes')
+ 
+   var lines =<< trim END
+       def Func(# comment
+         arg: string)
+       enddef
+   END
+   CheckScriptFailure(lines, 'E125:', 1)
+ 
+   lines =<< trim END
+       def Func(
+         arg: string# comment
+         )
+       enddef
+   END
+   CheckScriptFailure(lines, 'E475:', 2)
+ 
+   lines =<< trim END
+       def Func(
+         arg: string
+         )# comment
+       enddef
+   END
+   CheckScriptFailure(lines, 'E488:', 3)
+ enddef
+ 
  def Test_nested_function()
    def Nested(arg: string): string
      return 'nested ' .. arg
*** ../vim-8.2.2297/src/version.c       2021-01-04 13:37:50.251107339 +0100
--- src/version.c       2021-01-04 14:09:09.749887505 +0100
***************
*** 752,753 ****
--- 752,755 ----
  {   /* Add new patch number below this line */
+ /**/
+     2298,
  /**/

-- 
>From "know your smileys":
 %      Bike accident.  A bit far-fetched, I suppose; although...
             o      _     _         _
     _o     /\_   _ \\o  (_)\__/o  (_)
   _< \_   _>(_) (_)/<_    \_| \   _|/' \/
  (_)>(_) (_)        (_)   (_)    (_)'  _\o_

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
///        sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\  an exciting new programming language -- http://www.Zimbu.org        ///
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