--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Sep 23
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 Oct 08
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -230,6 +230,8 @@ getcharmod()			Number	modifiers for the 
 getcharpos({expr})		List	position of cursor, mark, etc.
 getcharsearch()			Dict	last character search
 getcharstr([{expr}])		String	get one character from the user
+getcmdcomplpat()		String	return the completion pattern of the
+					current command-line completion
 getcmdcompltype()		String	return the type of the current
 					command-line completion
 getcmdline()			String	return the current command-line input
@@ -3973,6 +3975,16 @@ getcharstr([{expr}])					*getcharstr()*
 
 		Return type: |String|
 
+getcmdcomplpat()					*getcmdcomplpat()*
+		Return completion pattern of the current command-line.
+		Only works when the command line is being edited, thus
+		requires use of |c_CTRL-\_e| or |c_CTRL-R_=|.
+		Also see |getcmdtype()|, |setcmdpos()|, |getcmdline()|,
+		|getcmdprompt()|, |getcmdcompltype()| and |setcmdline()|.
+		Returns an empty string when completion is not defined.
+
+		Return type: |String|
+
 
 getcmdcompltype()					*getcmdcompltype()*
 		Return the type of the current command-line completion.
@@ -3980,7 +3992,7 @@ getcmdcompltype()					*getcmdcompltype()
 		requires use of |c_CTRL-\_e| or |c_CTRL-R_=|.
 		See |:command-completion| for the return string.
 		Also see |getcmdtype()|, |setcmdpos()|, |getcmdline()|,
-		|getcmdprompt()| and |setcmdline()|.
+		|getcmdprompt()|, |getcmdcomplpat()| and |setcmdline()|.
 		Returns an empty string when completion is not defined.
 
 		Return type: |String|

--- a/runtime/doc/map.txt
+++ b/runtime/doc/map.txt
@@ -1,4 +1,4 @@
-*map.txt*       For Vim version 9.1.  Last change: 2024 Oct 07
+*map.txt*       For Vim version 9.1.  Last change: 2024 Oct 08
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1657,6 +1657,8 @@ completion can be enabled:
 	-complete=runtime	file and directory names in |'runtimepath'|
 	-complete=scriptnames	sourced script names
 	-complete=shellcmd	Shell command
+	-complete=shellcmdline	First is a shell command and subsequent ones
+				are filenames. The same behavior as |:!cmd|
 	-complete=sign		|:sign| suboptions
 	-complete=syntax	syntax file names |'syntax'|
 	-complete=syntime	|:syntime| suboptions

--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -7827,6 +7827,7 @@ getcharmod()	builtin.txt	/*getcharmod()*
 getcharpos()	builtin.txt	/*getcharpos()*
 getcharsearch()	builtin.txt	/*getcharsearch()*
 getcharstr()	builtin.txt	/*getcharstr()*
+getcmdcomplpat()	builtin.txt	/*getcmdcomplpat()*
 getcmdcompltype()	builtin.txt	/*getcmdcompltype()*
 getcmdline()	builtin.txt	/*getcmdline()*
 getcmdpos()	builtin.txt	/*getcmdpos()*

--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1068,6 +1068,8 @@ Buffers, windows and the argument list:
 	swapname()		get the swap file path of a buffer
 
 Command line:					*command-line-functions*
+	getcmdcomplpat()	get completion pattern of the current command
+				line
 	getcmdcompltype()	get the type of the current command line
 				completion
 	getcmdline()		get the current command line input

--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -1,4 +1,4 @@
-*version9.txt*  For Vim version 9.1.  Last change: 2024 Oct 05
+*version9.txt*  For Vim version 9.1.  Last change: 2024 Oct 08
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41589,6 +41589,8 @@ Changed~
 - allow to complete directories from 'cdpath' for |:cd| and similar commands,
   add the "cd_in_path" completion type for e.g. |:command-complete| and
   |getcompletion()|
+- allow to complete shell commands and files using the new shellcmdline
+  completion type using |:command-complete| and |getcmdcomplpat()|
 - add 'cpoptions' flag "z" |cpo-z|, to disable some (traditional) vi
   behaviour/inconsistency (see |d-special| and |cw|).
 - allow to specify additional attributes in the completion menu (allows to
@@ -41608,6 +41610,7 @@ Functions: ~
 |diff()|		diff two Lists of strings
 |filecopy()|		copy a file {from} to {to}
 |foreach()|		apply function to List items
+|getcmdcomplpat()|	Shell command line completion
 |getcmdprompt()|	get prompt for input()/confirm()
 |getregion()|		get a region of text from a buffer
 |getregionpos()|	get a list of positions for a region

--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -2,7 +2,7 @@
 " Language:	   Vim script
 " Maintainer:	   Hirohito Higashi <h.east.727 ATMARK gmail.com>
 "	   Doug Kearns <dougkearns@gmail.com>
-" Last Change:	   2024 Oct 05
+" Last Change:	   2024 Oct 08
 " Former Maintainer: Charles E. Campbell
 
 " DO NOT CHANGE DIRECTLY.
@@ -103,11 +103,11 @@ syn case match
 " GEN_SYN_VIM: vimFuncName, START_STR='syn keyword vimFuncName contained', END_STR=''
 syn keyword vimFuncName contained abs acos add and append appendbufline argc argidx arglistid argv asin assert_beeps assert_equal assert_equalfile assert_exception assert_fails assert_false assert_inrange assert_match assert_nobeep assert_notequal assert_notmatch assert_report assert_true atan atan2 autocmd_add autocmd_delete autocmd_get balloon_gettext balloon_show balloon_split bindtextdomain blob2list browse browsedir bufadd bufexists buflisted bufload bufloaded bufname bufnr bufwinid bufwinnr byte2line byteidx byteidxcomp call ceil ch_canread ch_close ch_close_in ch_evalexpr ch_evalraw ch_getbufnr ch_getjob ch_info ch_log ch_logfile ch_open ch_read ch_readblob ch_readraw ch_sendexpr ch_sendraw ch_setoptions ch_status changenr char2nr charclass charcol charidx
 syn keyword vimFuncName contained chdir cindent clearmatches col complete complete_add complete_check complete_info confirm copy cos cosh count cscope_connection cursor debugbreak deepcopy delete deletebufline did_filetype diff diff_filler diff_hlID digraph_get digraph_getlist digraph_set digraph_setlist echoraw empty environ err_teapot escape eval eventhandler executable execute exepath exists exists_compiled exp expand expandcmd extend extendnew feedkeys filecopy filereadable filewritable filter finddir findfile flatten flattennew float2nr floor fmod fnameescape fnamemodify foldclosed foldclosedend foldlevel foldtext foldtextresult foreach foreground fullcommand funcref function garbagecollect get getbufinfo getbufline getbufoneline getbufvar getcellwidths getchangelist
-syn keyword vimFuncName contained getchar getcharmod getcharpos getcharsearch getcharstr getcmdcompltype getcmdline getcmdpos getcmdprompt getcmdscreenpos getcmdtype getcmdwintype getcompletion getcurpos getcursorcharpos getcwd getenv getfontname getfperm getfsize getftime getftype getimstatus getjumplist getline getloclist getmarklist getmatches getmousepos getmouseshape getpid getpos getqflist getreg getreginfo getregion getregionpos getregtype getscriptinfo gettabinfo gettabvar gettabwinvar gettagstack gettext getwininfo getwinpos getwinposx getwinposy getwinvar glob glob2regpat globpath has has_key haslocaldir hasmapto histadd histdel histget histnr hlID hlexists hlget hlset hostname iconv id indent index indexof input inputdialog inputlist inputrestore inputsave
-syn keyword vimFuncName contained inputsecret insert instanceof interrupt invert isabsolutepath isdirectory isinf islocked isnan items job_getchannel job_info job_setoptions job_start job_status job_stop join js_decode js_encode json_decode json_encode keys keytrans len libcall libcallnr line line2byte lispindent list2blob list2str listener_add listener_flush listener_remove localtime log log10 luaeval map maparg mapcheck maplist mapnew mapset match matchadd matchaddpos matcharg matchbufline matchdelete matchend matchfuzzy matchfuzzypos matchlist matchstr matchstrlist matchstrpos max menu_info min mkdir mode mzeval nextnonblank nr2char or pathshorten perleval popup_atcursor popup_beval popup_clear popup_close popup_create popup_dialog popup_filter_menu popup_filter_yesno
-syn keyword vimFuncName contained popup_findecho popup_findinfo popup_findpreview popup_getoptions popup_getpos popup_hide popup_list popup_locate popup_menu popup_move popup_notification popup_setbuf popup_setoptions popup_settext popup_show pow prevnonblank printf prompt_getprompt prompt_setcallback prompt_setinterrupt prompt_setprompt prop_add prop_add_list prop_clear prop_find prop_list prop_remove prop_type_add prop_type_change prop_type_delete prop_type_get prop_type_list pum_getpos pumvisible py3eval pyeval pyxeval rand range readblob readdir readdirex readfile reduce reg_executing reg_recording reltime reltimefloat reltimestr remote_expr remote_foreground remote_peek remote_read remote_send remote_startserver remove rename repeat resolve reverse round
-syn keyword vimFuncName contained rubyeval screenattr screenchar screenchars screencol screenpos screenrow screenstring search searchcount searchdecl searchpair searchpairpos searchpos server2client serverlist setbufline setbufvar setcellwidths setcharpos setcharsearch setcmdline setcmdpos setcursorcharpos setenv setfperm setline setloclist setmatches setpos setqflist setreg settabvar settabwinvar settagstack setwinvar sha256 shellescape shiftwidth sign_define sign_getdefined sign_getplaced sign_jump sign_place sign_placelist sign_undefine sign_unplace sign_unplacelist simplify sin sinh slice sort sound_clear sound_playevent sound_playfile sound_stop soundfold spellbadword spellsuggest split sqrt srand state str2float str2list str2nr strcharlen strcharpart strchars
-syn keyword vimFuncName contained strdisplaywidth strftime strgetchar stridx string strlen strpart strptime strridx strtrans strutf16len strwidth submatch substitute swapfilelist swapinfo swapname synID synIDattr synIDtrans synconcealed synstack system systemlist tabpagebuflist tabpagenr tabpagewinnr tagfiles taglist tan tanh tempname term_dumpdiff term_dumpload term_dumpwrite term_getaltscreen term_getansicolors term_getattr term_getcursor term_getjob term_getline term_getscrolled term_getsize term_getstatus term_gettitle term_gettty term_list term_scrape term_sendkeys term_setansicolors term_setapi term_setkill term_setrestore term_setsize term_start term_wait terminalprops test_alloc_fail test_autochdir test_feedinput test_garbagecollect_now test_garbagecollect_soon
+syn keyword vimFuncName contained getchar getcharmod getcharpos getcharsearch getcharstr getcmdcomplpat getcmdcompltype getcmdline getcmdpos getcmdprompt getcmdscreenpos getcmdtype getcmdwintype getcompletion getcurpos getcursorcharpos getcwd getenv getfontname getfperm getfsize getftime getftype getimstatus getjumplist getline getloclist getmarklist getmatches getmousepos getmouseshape getpid getpos getqflist getreg getreginfo getregion getregionpos getregtype getscriptinfo gettabinfo gettabvar gettabwinvar gettagstack gettext getwininfo getwinpos getwinposx getwinposy getwinvar glob glob2regpat globpath has has_key haslocaldir hasmapto histadd histdel histget histnr hlID hlexists hlget hlset hostname iconv id indent index indexof input inputdialog inputlist
+syn keyword vimFuncName contained inputrestore inputsave inputsecret insert instanceof interrupt invert isabsolutepath isdirectory isinf islocked isnan items job_getchannel job_info job_setoptions job_start job_status job_stop join js_decode js_encode json_decode json_encode keys keytrans len libcall libcallnr line line2byte lispindent list2blob list2str listener_add listener_flush listener_remove localtime log log10 luaeval map maparg mapcheck maplist mapnew mapset match matchadd matchaddpos matcharg matchbufline matchdelete matchend matchfuzzy matchfuzzypos matchlist matchstr matchstrlist matchstrpos max menu_info min mkdir mode mzeval nextnonblank nr2char or pathshorten perleval popup_atcursor popup_beval popup_clear popup_close popup_create popup_dialog popup_filter_menu
+syn keyword vimFuncName contained popup_filter_yesno popup_findecho popup_findinfo popup_findpreview popup_getoptions popup_getpos popup_hide popup_list popup_locate popup_menu popup_move popup_notification popup_setbuf popup_setoptions popup_settext popup_show pow prevnonblank printf prompt_getprompt prompt_setcallback prompt_setinterrupt prompt_setprompt prop_add prop_add_list prop_clear prop_find prop_list prop_remove prop_type_add prop_type_change prop_type_delete prop_type_get prop_type_list pum_getpos pumvisible py3eval pyeval pyxeval rand range readblob readdir readdirex readfile reduce reg_executing reg_recording reltime reltimefloat reltimestr remote_expr remote_foreground remote_peek remote_read remote_send remote_startserver remove rename repeat resolve
+syn keyword vimFuncName contained reverse round rubyeval screenattr screenchar screenchars screencol screenpos screenrow screenstring search searchcount searchdecl searchpair searchpairpos searchpos server2client serverlist setbufline setbufvar setcellwidths setcharpos setcharsearch setcmdline setcmdpos setcursorcharpos setenv setfperm setline setloclist setmatches setpos setqflist setreg settabvar settabwinvar settagstack setwinvar sha256 shellescape shiftwidth sign_define sign_getdefined sign_getplaced sign_jump sign_place sign_placelist sign_undefine sign_unplace sign_unplacelist simplify sin sinh slice sort sound_clear sound_playevent sound_playfile sound_stop soundfold spellbadword spellsuggest split sqrt srand state str2float str2list str2nr strcharlen strcharpart
+syn keyword vimFuncName contained strchars strdisplaywidth strftime strgetchar stridx string strlen strpart strptime strridx strtrans strutf16len strwidth submatch substitute swapfilelist swapinfo swapname synID synIDattr synIDtrans synconcealed synstack system systemlist tabpagebuflist tabpagenr tabpagewinnr tagfiles taglist tan tanh tempname term_dumpdiff term_dumpload term_dumpwrite term_getaltscreen term_getansicolors term_getattr term_getcursor term_getjob term_getline term_getscrolled term_getsize term_getstatus term_gettitle term_gettty term_list term_scrape term_sendkeys term_setansicolors term_setapi term_setkill term_setrestore term_setsize term_start term_wait terminalprops test_alloc_fail test_autochdir test_feedinput test_garbagecollect_now test_garbagecollect_soon
 syn keyword vimFuncName contained test_getvalue test_gui_event test_ignore_error test_mswin_event test_null_blob test_null_channel test_null_dict test_null_function test_null_job test_null_list test_null_partial test_null_string test_option_not_set test_override test_refcount test_setmouse test_settime test_srand_seed test_unknown test_void timer_info timer_pause timer_start timer_stop timer_stopall tolower toupper tr trim trunc type typename undofile undotree uniq utf16idx values virtcol virtcol2col visualmode wildmenumode win_execute win_findbuf win_getid win_gettype win_gotoid win_id2tabwin win_id2win win_move_separator win_move_statusline win_screenpos win_splitmove winbufnr wincol windowsversion winheight winlayout winline winnr winrestcmd winrestview winsaveview
 syn keyword vimFuncName contained winwidth wordcount writefile xor
 
@@ -542,7 +542,7 @@ endif
 syn case ignore
 syn keyword	vimUserCmdAttrKey   contained	a[ddr] ban[g] bar bu[ffer] com[plete] cou[nt] k[eepscript] n[args] ra[nge] re[gister]
 " GEN_SYN_VIM: vimUserCmdAttrCmplt, START_STR='syn keyword vimUserCmdAttrCmplt contained', END_STR=''
-syn keyword vimUserCmdAttrCmplt contained arglist augroup behave breakpoint buffer color command compiler cscope diff_buffer dir dir_in_path environment event expression file file_in_path filetype function help highlight history keymap locale mapclear mapping menu messages option packadd runtime scriptnames shellcmd sign syntax syntime tag tag_listfiles user var
+syn keyword vimUserCmdAttrCmplt contained arglist augroup behave breakpoint buffer color command compiler cscope diff_buffer dir dir_in_path environment event expression file file_in_path filetype function help highlight history keymap locale mapclear mapping menu messages option packadd runtime scriptnames shellcmd shellcmdline sign syntax syntime tag tag_listfiles user var
 syn keyword	vimUserCmdAttrCmplt     contained	custom customlist nextgroup=vimUserCmdAttrCmpltFunc,vimUserCmdError
 syn match	vimUserCmdAttrCmpltFunc contained	",\%([sS]:\|<[sS][iI][dD]>\)\=\%(\h\w*\%([.#]\h\w*\)\+\|\h\w*\)"hs=s+1 nextgroup=vimUserCmdError
 " GEN_SYN_VIM: vimUserCmdAttrAddr, START_STR='syn keyword vimUserCmdAttrAddr contained', END_STR=''

--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -59,6 +59,7 @@ cmdline_fuzzy_completion_supported(expan
 	    && xp->xp_context != EXPAND_PACKADD
 	    && xp->xp_context != EXPAND_RUNTIME
 	    && xp->xp_context != EXPAND_SHELLCMD
+	    && xp->xp_context != EXPAND_SHELLCMDLINE
 	    && xp->xp_context != EXPAND_TAGS
 	    && xp->xp_context != EXPAND_TAGS_LISTFILES
 	    && xp->xp_context != EXPAND_USER_LIST);
@@ -1754,7 +1755,7 @@ set_context_for_wildcard_arg(
     xp->xp_context = EXPAND_FILES;
 
     // For a shell command more chars need to be escaped.
-    if (usefilter || eap->cmdidx == CMD_bang || eap->cmdidx == CMD_terminal)
+    if (usefilter || eap->cmdidx == CMD_bang || eap->cmdidx == CMD_terminal || *complp == EXPAND_SHELLCMDLINE)
     {
 #ifndef BACKSLASH_IN_FILENAME
 	xp->xp_shell = TRUE;

--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -2091,6 +2091,8 @@ static funcentry_T global_functions[] =
 			ret_dict_any,	    f_getcharsearch},
     {"getcharstr",	0, 1, 0,	    arg1_bool,
 			ret_string,	    f_getcharstr},
+    {"getcmdcomplpat",	0, 0, 0,	    NULL,
+			ret_string,	    f_getcmdcomplpat},
     {"getcmdcompltype",	0, 0, 0,	    NULL,
 			ret_string,	    f_getcmdcompltype},
     {"getcmdline",	0, 0, 0,	    NULL,

--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -4205,6 +4205,40 @@ get_cmdline_str(void)
 }
 
 /*
+ * Get the current command-line completion pattern.
+ */
+    static char_u *
+get_cmdline_completion_pattern(void)
+{
+    cmdline_info_T *p;
+    int		xp_context;
+
+    if (cmdline_star > 0)
+	return NULL;
+
+    p = get_ccline_ptr();
+    if (p == NULL || p->xpc == NULL)
+	return NULL;
+
+    xp_context = p->xpc->xp_context;
+    if (xp_context == EXPAND_NOTHING)
+    {
+	set_expand_context(p->xpc);
+	xp_context = p->xpc->xp_context;
+	p->xpc->xp_context = EXPAND_NOTHING;
+    }
+    if (xp_context == EXPAND_UNSUCCESSFUL)
+	return NULL;
+
+    char_u *compl_pat = p->xpc->xp_pattern;
+
+    if (compl_pat == NULL)
+	return NULL;
+
+    return vim_strsave(compl_pat);
+}
+
+/*
  * Get the current command-line completion type.
  */
     static char_u *
@@ -4248,6 +4282,16 @@ get_cmdline_completion(void)
 }
 
 /*
+ * "getcmdcomplpat()" function
+ */
+    void
+f_getcmdcomplpat(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    rettv->v_type = VAR_STRING;
+    rettv->vval.v_string = get_cmdline_completion_pattern();
+}
+
+/*
  * "getcmdcompltype()" function
  */
     void

--- a/src/proto/ex_getln.pro
+++ b/src/proto/ex_getln.pro
@@ -30,6 +30,7 @@ char_u *vim_strsave_fnameescape(char_u *
 void escape_fname(char_u **pp);
 void tilde_replace(char_u *orig_pat, int num_files, char_u **files);
 cmdline_info_T *get_cmdline_info(void);
+void f_getcmdcomplpat(typval_T *argvars, typval_T *rettv);
 void f_getcmdcompltype(typval_T *argvars, typval_T *rettv);
 void f_getcmdline(typval_T *argvars, typval_T *rettv);
 void f_getcmdpos(typval_T *argvars, typval_T *rettv);

--- a/src/testdir/test_cmdline.vim
+++ b/src/testdir/test_cmdline.vim
@@ -1078,6 +1078,16 @@ func Test_cmdline_complete_user_names()
   endif
 endfunc
 
+func Test_cmdline_complete_shellcmdline()
+  CheckExecutable whoami
+  command -nargs=1 -complete=shellcmdline MyCmd
+
+  call feedkeys(":MyCmd whoam\<C-A>\<C-B>\"\<CR>", 'tx')
+  call assert_match('^".*\<whoami\>', @:)
+
+  delcommand MyCmd
+endfunc
+
 func Test_cmdline_complete_bang()
   CheckExecutable whoami
   call feedkeys(":!whoam\<C-A>\<C-B>\"\<CR>", 'tx')
@@ -3631,6 +3641,52 @@ func Test_cmdline_complete_substitute_sh
   endfor
 endfunc
 
+" Test for shellcmdline command argument completion
+func Test_cmdline_complete_shellcmdline_argument()
+  command -nargs=+ -complete=shellcmdline MyCmd
+
+  set wildoptions=fuzzy
+
+  call feedkeys(":MyCmd vim test_cmdline.\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim test_cmdline.vim', @:)
+
+  call feedkeys(":MyCmd vim nonexistentfile\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim nonexistentfile', @:)
+
+  let compl1 = getcompletion('', 'file')[0]
+  let compl2 = getcompletion('', 'file')[1]
+  call feedkeys(":MyCmd vim \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1, @:)
+
+  call feedkeys(":MyCmd vim \<Tab> \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1 .. ' ' .. compl1, @:)
+
+  let compl = getcompletion('', 'file')[1]
+  call feedkeys(":MyCmd vim \<Tab> \<Tab>\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1 .. ' ' .. compl2, @:)
+
+  set wildoptions&
+  call feedkeys(":MyCmd vim test_cmdline.\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim test_cmdline.vim', @:)
+
+  call feedkeys(":MyCmd vim nonexistentfile\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim nonexistentfile', @:)
+
+  let compl1 = getcompletion('', 'file')[0]
+  let compl2 = getcompletion('', 'file')[1]
+  call feedkeys(":MyCmd vim \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1, @:)
+
+  call feedkeys(":MyCmd vim \<Tab> \<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1 .. ' ' .. compl1, @:)
+
+  let compl = getcompletion('', 'file')[1]
+  call feedkeys(":MyCmd vim \<Tab> \<Tab>\<Tab>\<C-B>\"\<CR>", 'xt')
+  call assert_equal('"MyCmd vim ' .. compl1 .. ' ' .. compl2, @:)
+
+  delcommand MyCmd
+endfunc
+
 " Test for :! shell command argument completion
 func Test_cmdline_complete_bang_cmd_argument()
   set wildoptions=fuzzy
@@ -3642,30 +3698,32 @@ func Test_cmdline_complete_bang_cmd_argu
 endfunc
 
 func Call_cmd_funcs()
-  return [getcmdpos(), getcmdscreenpos(), getcmdcompltype()]
+  return [getcmdpos(), getcmdscreenpos(), getcmdcompltype(), getcmdcomplpat()]
 endfunc
 
 func Test_screenpos_and_completion()
   call assert_equal(0, getcmdpos())
   call assert_equal(0, getcmdscreenpos())
   call assert_equal('', getcmdcompltype())
+  call assert_equal('', getcmdcomplpat())
 
   cnoremap <expr> <F2> string(Call_cmd_funcs())
   call feedkeys(":let a\<F2>\<C-B>\"\<CR>", "xt")
-  call assert_equal("\"let a[6, 7, 'var']", @:)
+  call assert_equal("\"let a[6, 7, 'var', 'a']", @:)
   call feedkeys(":quit \<F2>\<C-B>\"\<CR>", "xt")
-  call assert_equal("\"quit [6, 7, '']", @:)
+  call assert_equal("\"quit [6, 7, '', '']", @:)
   call feedkeys(":nosuchcommand \<F2>\<C-B>\"\<CR>", "xt")
-  call assert_equal("\"nosuchcommand [15, 16, '']", @:)
-
-  " Check that getcmdcompltype() doesn't interfere with cmdline completion.
+  call assert_equal("\"nosuchcommand [15, 16, '', '']", @:)
+
+  " Check that getcmdcompltype() and getcmdcomplpat() don't interfere with
+  " cmdline completion.
   let g:results = []
   cnoremap <F2> <Cmd>let g:results += [[getcmdline()] + Call_cmd_funcs()]<CR>
   call feedkeys(":sign un\<Tab>\<F2>\<Tab>\<F2>\<Tab>\<F2>\<C-C>", "xt")
   call assert_equal([
-        \ ['sign undefine', 14, 15, 'sign'],
-        \ ['sign unplace', 13, 14, 'sign'],
-        \ ['sign un', 8, 9, 'sign']], g:results)
+        \ ['sign undefine', 14, 15, 'sign', 'undefine'],
+        \ ['sign unplace', 13, 14, 'sign', 'unplace'],
+        \ ['sign un', 8, 9, 'sign', 'un']], g:results)
 
   unlet g:results
   cunmap <F2>

--- a/src/usercmd.c
+++ b/src/usercmd.c
@@ -92,6 +92,7 @@ static keyvalue_T command_complete_tab[]
     KEYVALUE_ENTRY(EXPAND_SCRIPTNAMES, "scriptnames"),
 #endif
     KEYVALUE_ENTRY(EXPAND_SHELLCMD, "shellcmd"),
+    KEYVALUE_ENTRY(EXPAND_SHELLCMDLINE, "shellcmdline"),
 #if defined(FEAT_SIGNS)
     KEYVALUE_ENTRY(EXPAND_SIGN, "sign"),
 #endif
@@ -328,7 +329,6 @@ set_context_in_user_cmdarg(
     if (argt & EX_XFILE)
     {
 	// EX_XFILE: file names are handled before this call
-	xp->xp_context = context;
 	return NULL;
     }
 
@@ -850,7 +850,7 @@ parse_compl_arg(
     *complp = entry->key;
     if (*complp == EXPAND_BUFFERS)
 	*argt |= EX_BUFNAME;
-    else if (*complp == EXPAND_DIRECTORIES || *complp == EXPAND_FILES)
+    else if (*complp == EXPAND_DIRECTORIES || *complp == EXPAND_FILES || *complp == EXPAND_SHELLCMDLINE)
 	*argt |= EX_XFILE;
 
     if (

--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    770,
+/**/
     769,
 /**/
     768,

--- a/src/vim.h
+++ b/src/vim.h
@@ -844,6 +844,7 @@ extern int (*dyn_libintl_wputenv)(const 
 #define EXPAND_TERMINALOPT	57
 #define EXPAND_KEYMAP		58
 #define EXPAND_DIRS_IN_CDPATH	59
+#define EXPAND_SHELLCMDLINE	60
 
 
 // Values for exmode_active (0 is no exmode)