patch 8.2.4702: C++ scope labels are hard-coded

Problem:    C++ scope labels are hard-coded.
Solution:   Add 'cinscopedecls' to define the labels. (Rom Praschan,
            closes #10109)

runtime/doc/indent.txt

@@ -42,11 +42,12 @@ is not a C compiler: it does not recognize all syntax.  One requirement is
 that toplevel functions have a '{' in the first column.  Otherwise they are
 easily confused with declarations.
 
-These four options control C program indenting:
+These five options control C program indenting:
 'cindent'	Enables Vim to perform C program indenting automatically.
 'cinkeys'	Specifies which keys trigger reindenting in insert mode.
 'cinoptions'	Sets your preferred indent style.
 'cinwords'	Defines keywords that start an extra indent in the next line.
+'cinscopedecls'	Defines strings that are recognized as a C++ scope declaration.
 
 If 'lisp' is not on and 'equalprg' is empty, the "=" operator indents using
 Vim's built-in algorithm rather than calling an external program.
@@ -293,8 +294,9 @@ The examples below assume a 'shiftwidth' of 4.
 <
 							*cino-g*
 	gN    Place C++ scope declarations N characters from the indent of the
-	      block they are in.  (default 'shiftwidth').  A scope declaration
-	      can be "public:", "protected:" or "private:".
+	      block they are in.  (default 'shiftwidth'). By default, a scope 
+	      declaration is "public:", "protected:" or "private:". This can
+	      be adjusted with the 'cinscopedecls' option.
 
 		cino=		    cino=g0 >
 		  {		      {

runtime/doc/options.txt

@@ -1661,13 +1661,23 @@ A jump table for the options with a short description can be found at |Q_op|.
 	matter, include the keyword both the uppercase and lowercase:
 	"if,If,IF".
 
-						*'clipboard'* *'cb'*
+						*'cinscopedecls'* *'cinsd'*
+'cinscopedecls' 'cinsd'	string	(default "public,protected,private")
+			local to buffer
+			{not available when compiled without the |+cindent|
+			feature}
+	Keywords that are interpreted as a C++ scope declaration by |cino-g|.
+	Useful e.g. for working with the Qt framework that defines additional
+	scope declarations "signals", "public slots" and "private slots": >
+		set cinscopedecls+=signals,public\ slots,private\ slots
+
+<						*'clipboard'* *'cb'*
 'clipboard' 'cb'	string	(default "autoselect,exclude:cons\|linux"
 						  for X-windows, "" otherwise)
 			global
 			{only in GUI versions or when the |+xterm_clipboard|
 			feature is included}
-	This option is a list of comma separated names.
+	This option is a list of comma-separated names.
 	Note: if one of the items is "exclude:", then you can't add an item
 	after that.  Therefore do append an item with += but use ^= to
 	prepend, e.g.: >

runtime/doc/quickref.txt

@@ -643,6 +643,7 @@ Short explanation of each option:		*option-list*
 'cinkeys'	  'cink'    keys that trigger indent when 'cindent' is set
 'cinoptions'	  'cino'    how to do indenting when 'cindent' is set
 'cinwords'	  'cinw'    words where 'si' and 'cin' add an indent
+'cinscopedecls'	  'cinsd'   words that are recognized by 'cino-g' 
 'clipboard'	  'cb'	    use the clipboard as the unnamed register
 'cmdheight'	  'ch'	    number of lines to use for the command-line
 'cmdwinheight'	  'cwh'     height of the command-line window

runtime/optwin.vim

@@ -624,6 +624,8 @@ call <SID>BinOptionG("scf", &scf)
 if has("gui")
   call <SID>AddOption("mousehide", gettext("hide the mouse pointer while typing"))
   call <SID>BinOptionG("mh", &mh)
+  call <SID>AddOption("mousemoveevent", gettext("report mouse movement events"))
+  call <SID>BinOptionG("mousemev", &mousemev)
 endif
 call <SID>AddOption("mousemodel", gettext("\"extend\", \"popup\" or \"popup_setpos\"; what the right\nmouse button is used for"))
 call <SID>OptionG("mousem", &mousem)
@@ -927,6 +929,9 @@ if has("cindent")
   call <SID>AddOption("cinwords", gettext("list of words that cause more C-indent"))
   call append("$", "\t" .. s:local_to_buffer)
   call <SID>OptionL("cinw")
+  call <SID>AddOption("cinscopedecls", gettext("list of scope declaration names used by cino-g"))
+  call append("$", "\t" .. s:local_to_buffer)
+  call <SID>OptionL("cinsd")
   call <SID>AddOption("indentexpr", gettext("expression used to obtain the indent of a line"))
   call append("$", "\t" .. s:local_to_buffer)
   call <SID>OptionL("inde")

src/buffer.c

@@ -2353,6 +2353,7 @@ free_buf_options(
 #ifdef FEAT_CINDENT
     clear_string_option(&buf->b_p_cink);
     clear_string_option(&buf->b_p_cino);
+    clear_string_option(&buf->b_p_cinsd);
 #endif
 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
     clear_string_option(&buf->b_p_cinw);

src/cindent.c

@@ -423,20 +423,34 @@ cin_islabel_skip(char_u **s)
  * Recognize a "public/private/protected" scope declaration label.
  */
     static int
-cin_isscopedecl(char_u *s)
+cin_isscopedecl(char_u *p)
 {
-    int		i;
+    size_t cinsd_len;
+    char_u *cinsd_buf;
+    char_u *cinsd;
+    size_t len;
+    char_u *skip;
+    char_u *s = cin_skipcomment(p);
 
-    s = cin_skipcomment(s);
-    if (STRNCMP(s, "public", 6) == 0)
-	i = 6;
-    else if (STRNCMP(s, "protected", 9) == 0)
-	i = 9;
-    else if (STRNCMP(s, "private", 7) == 0)
-	i = 7;
-    else
-	return FALSE;
-    return (*(s = cin_skipcomment(s + i)) == ':' && s[1] != ':');
+    cinsd_len = STRLEN(curbuf->b_p_cinsd) + 1;
+    cinsd_buf = alloc(cinsd_len);
+    if (cinsd_buf != NULL)
+    {
+	for (cinsd = curbuf->b_p_cinsd; *cinsd; )
+	{
+	    len = copy_option_part(&cinsd, cinsd_buf, cinsd_len, ",");
+	    if (STRNCMP(s, cinsd_buf, len) == 0)
+	    {
+		skip = cin_skipcomment(s + len);
+		if (*skip == ':' && skip[1] != ':')
+		    return TRUE;
+	    }
+	}
+
+	vim_free(cinsd_buf);
+    }
+
+    return FALSE;
 }
 
 /*

src/option.c

@@ -5449,6 +5449,7 @@ get_varp(struct vimoption *p)
 	case PV_CIN:	return (char_u *)&(curbuf->b_p_cin);
 	case PV_CINK:	return (char_u *)&(curbuf->b_p_cink);
 	case PV_CINO:	return (char_u *)&(curbuf->b_p_cino);
+	case PV_CINSD:	return (char_u *)&(curbuf->b_p_cinsd);
 #endif
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
 	case PV_CINW:	return (char_u *)&(curbuf->b_p_cinw);
@@ -6020,6 +6021,8 @@ buf_copy_options(buf_T *buf, int flags)
 	    COPY_OPT_SCTX(buf, BV_CINK);
 	    buf->b_p_cino = vim_strsave(p_cino);
 	    COPY_OPT_SCTX(buf, BV_CINO);
+	    buf->b_p_cinsd = vim_strsave(p_cinsd);
+	    COPY_OPT_SCTX(buf, BV_CINSD);
 #endif
 	    // Don't copy 'filetype', it must be detected
 	    buf->b_p_ft = empty_option;

src/option.h

@@ -400,6 +400,7 @@ EXTERN int	p_bl;		// 'buflisted'
 #ifdef FEAT_CINDENT
 EXTERN int	p_cin;		// 'cindent'
 EXTERN char_u	*p_cink;	// 'cinkeys'
+EXTERN char_u	*p_cinsd;	// 'cinscopedecls'
 #endif
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
 EXTERN char_u	*p_cinw;	// 'cinwords'
@@ -1126,6 +1127,7 @@ enum
     , BV_CIN
     , BV_CINK
     , BV_CINO
+    , BV_CINSD
 #endif
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
     , BV_CINW

src/optiondefs.h

@@ -44,6 +44,7 @@
 # define PV_CIN		OPT_BUF(BV_CIN)
 # define PV_CINK	OPT_BUF(BV_CINK)
 # define PV_CINO	OPT_BUF(BV_CINO)
+# define PV_CINSD	OPT_BUF(BV_CINSD)
 #endif
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
 # define PV_CINW	OPT_BUF(BV_CINW)
@@ -603,6 +604,15 @@ static struct vimoption options[] =
 			    (char_u *)NULL, PV_NONE,
 #endif
 			    {(char_u *)"", (char_u *)0L} SCTX_INIT},
+    {"cinscopedecls", "cinsd", P_STRING|P_ALLOCED|P_VI_DEF|P_ONECOMMA|P_NODUP,
+#ifdef FEAT_CINDENT
+			    (char_u *)&p_cinsd, PV_CINSD,
+			    {(char_u *)"public,protected,private", (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
+#endif
+			    SCTX_INIT},
     {"cinwords",    "cinw", P_STRING|P_ALLOCED|P_VI_DEF|P_ONECOMMA|P_NODUP,
 #if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
 			    (char_u *)&p_cinw, PV_CINW,

src/optionstr.c

@@ -260,6 +260,7 @@ check_buf_options(buf_T *buf)
 #ifdef FEAT_CINDENT
     check_string_option(&buf->b_p_cink);
     check_string_option(&buf->b_p_cino);
+    check_string_option(&buf->b_p_cinsd);
     parse_cino(buf);
 #endif
     check_string_option(&buf->b_p_ft);

src/structs.h

@@ -2881,6 +2881,7 @@ struct file_buffer
     int		b_p_cin;	// 'cindent'
     char_u	*b_p_cino;	// 'cinoptions'
     char_u	*b_p_cink;	// 'cinkeys'
+    char_u	*b_p_cinsd;	// 'cinscopedecls'
 #endif
 #if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
     char_u	*b_p_cinw;	// 'cinwords'

src/testdir/test_cindent.vim

@@ -5319,6 +5319,49 @@ func Test_cindent_change_multline()
   close!
 endfunc
 
+func Test_cindent_scopedecls()
+  new
+  setl cindent ts=4 sw=4
+  setl cino=g0
+  setl cinsd+=public\ slots,signals
+
+  let code =<< trim [CODE]
+  class Foo
+  {
+  public:
+  virtual void foo() = 0;
+  public slots:
+  void onBar();
+  signals:
+  void baz();
+  private:
+  int x;
+  };
+  [CODE]
+
+  call append(0, code)
+  normal gg
+  normal ]]=][
+
+  let expected =<< trim [CODE]
+  class Foo
+  {
+  public:
+	virtual void foo() = 0;
+  public slots:
+	void onBar();
+  signals:
+	void baz();
+  private:
+	int x;
+  };
+
+  [CODE]
+
+  call assert_equal(expected, getline(1, '$'))
+  enew! | close
+endfunc
+
 func Test_cindent_pragma()
   new
   setl cindent ts=4 sw=4

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4702,
 /**/
     4701,
 /**/