Merge pull request #21149 from zeertzjq/vim-9.0.0916

vim-patch:8.2.{2435,2479},9.0.0916

8 files changed, 80 insertions, 27 deletions

diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index fa9fb286ae..fdee409639 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -170,6 +170,7 @@ get({func}, {what})		any	get property of funcref/partial {func}
 getbufinfo([{buf}])		List	information about buffers
 getbufline({buf}, {lnum} [, {end}])
 				List	lines {lnum} to {end} of buffer {buf}
+getbufoneline({buf}, {lnum})	String	line {lnum} of buffer {buf}
 getbufvar({buf}, {varname} [, {def}])
 				any	variable {varname} in buffer {buf}
 getchangelist([{buf}])		List	list of change list items
@@ -638,6 +639,7 @@ append({lnum}, {text})					*append()*
 		text line below line {lnum} in the current buffer.
 		Otherwise append {text} as one text line below line {lnum} in
 		the current buffer.
+		Any type of item is accepted and converted to a String.
 		{lnum} can be zero to insert a line before the first one.
 		{lnum} is used like with |getline()|.
 		Returns 1 for failure ({lnum} out of range or out of memory),
@@ -2684,11 +2686,13 @@ getbufinfo([{dict}])
 		Can also be used as a |method|: >
 			GetBufnr()->getbufinfo()
 <
+
 							*getbufline()*
 getbufline({buf}, {lnum} [, {end}])
 		Return a |List| with the lines starting from {lnum} to {end}
 		(inclusive) in the buffer {buf}.  If {end} is omitted, a
-		|List| with only the line {lnum} is returned.
+		|List| with only the line {lnum} is returned.  See
+		`getbufoneline()` for only getting the line.
 
 		For the use of {buf}, see |bufname()| above.
 
@@ -2711,6 +2715,11 @@ getbufline({buf}, {lnum} [, {end}])
 
 <		Can also be used as a |method|: >
 			GetBufnr()->getbufline(lnum)
+<
+							*getbufoneline()*
+getbufoneline({buf}, {lnum})
+		Just like `getbufline()` but only get one line and return it
+		as a string.
 
 getbufvar({buf}, {varname} [, {def}])				*getbufvar()*
 		The result is the value of option or local buffer variable
@@ -3198,7 +3207,8 @@ getline({lnum} [, {end}])
 <		Can also be used as a |method|: >
 			ComputeLnum()->getline()
 
-<		To get lines from another buffer see |getbufline()|
+<		To get lines from another buffer see |getbufline()| and
+		|getbufoneline()|
 
 getloclist({nr} [, {what}])				*getloclist()*
 		Returns a |List| with all the entries in the location list for
@@ -7054,6 +7064,8 @@ setline({lnum}, {text})					*setline()*
 		{lnum} is used like with |getline()|.
 		When {lnum} is just below the last line the {text} will be
 		added below the last line.
+		{text} can be any type or a List of any type, each item is
+		converted to a String.
 
 		If this succeeds, FALSE is returned.  If this fails (most likely
 		because {lnum} is invalid) TRUE is returned.
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index e4f8030f16..eb42e10338 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -229,13 +229,13 @@ is not available it returns zero or the default value you specify: >
 
 
 List concatenation ~
-
+							*list-concatenation*
 Two lists can be concatenated with the "+" operator: >
 	:let longlist = mylist + [5, 6]
 	:let mylist += [7, 8]
 
-To prepend or append an item turn the item into a list by putting [] around
-it.  To change a list in-place see |list-modification| below.
+To prepend or append an item, turn the item into a list by putting [] around
+it.  To change a list in-place, refer to |list-modification| below.
 
 
 Sublist ~
diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 067ad6648c..226bd029a3 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -785,6 +785,13 @@ Working with text in the current buffer:		*text-functions*
 	getcharsearch()		return character search information
 	setcharsearch()		set character search information
 
+Working with text in another buffer:
+	getbufline()		get a list of lines from the specified buffer
+	getbufoneline()		get a one line from the specified buffer
+	setbufline()		replace a line in the specified buffer
+	appendbufline()		append a list of lines in the specified buffer
+	deletebufline()		delete lines from a specified buffer
+
 					*system-functions* *file-functions*
 System functions and manipulation of files:
 	glob()			expand wildcards
@@ -838,8 +845,10 @@ Buffers, windows and the argument list:
 	argidx()		current position in the argument list
 	arglistid()		get id of the argument list
 	argv()			get one entry from the argument list
+	bufadd()		add a file to the list of buffers
 	bufexists()		check if a buffer exists
 	buflisted()		check if a buffer exists and is listed
+	bufload()		ensure a buffer is loaded
 	bufloaded()		check if a buffer exists and is loaded
 	bufname()		get the name of a specific buffer
 	bufnr()			get the buffer number of a specific buffer
@@ -850,10 +859,6 @@ Buffers, windows and the argument list:
 	bufwinid()		get the window ID of a specific buffer
 	bufwinnr()		get the window number of a specific buffer
 	winbufnr()		get the buffer number of a specific window
-	getbufline()		get a list of lines from the specified buffer
-	setbufline()		replace a line in the specified buffer
-	appendbufline()		append a list of lines in the specified buffer
-	deletebufline()		delete lines from a specified buffer
 	win_findbuf()		find windows containing a buffer
 	win_getid()		get window ID of a window
 	win_gettype()		get type of window
diff --git a/src/nvim/debugger.c b/src/nvim/debugger.c
index 71959cfa29..6f7d6a27ef 100644
--- a/src/nvim/debugger.c
+++ b/src/nvim/debugger.c
@@ -808,26 +808,26 @@ static linenr_T debuggy_find(bool file, char_u *fname, linenr_T after, garray_T
       typval_T *const tv = eval_expr_no_emsg(bp);
       if (tv != NULL) {
         if (bp->dbg_val == NULL) {
-          debug_oldval = typval_tostring(NULL);
+          debug_oldval = typval_tostring(NULL, true);
           bp->dbg_val = tv;
-          debug_newval = typval_tostring(bp->dbg_val);
+          debug_newval = typval_tostring(bp->dbg_val, true);
           line = true;
         } else {
           if (typval_compare(tv, bp->dbg_val, EXPR_IS, false) == OK
               && tv->vval.v_number == false) {
             line = true;
-            debug_oldval = typval_tostring(bp->dbg_val);
+            debug_oldval = typval_tostring(bp->dbg_val, true);
             // Need to evaluate again, typval_compare() overwrites "tv".
             typval_T *const v = eval_expr_no_emsg(bp);
-            debug_newval = typval_tostring(v);
+            debug_newval = typval_tostring(v, true);
             tv_free(bp->dbg_val);
             bp->dbg_val = v;
           }
           tv_free(tv);
         }
       } else if (bp->dbg_val != NULL) {
-        debug_oldval = typval_tostring(bp->dbg_val);
-        debug_newval = typval_tostring(NULL);
+        debug_oldval = typval_tostring(bp->dbg_val, true);
+        debug_newval = typval_tostring(NULL, true);
         tv_free(bp->dbg_val);
         bp->dbg_val = NULL;
         line = true;
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index 8e7eead62c..59dd689fa3 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -5592,9 +5592,9 @@ void screenchar_adjust(ScreenGrid **grid, int *row, int *col)
   *col -= (*grid)->comp_col;
 }
 
-/// Set line or list of lines in buffer "buf".
-void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T *lines,
-                      typval_T *rettv)
+/// Set line or list of lines in buffer "buf" to "lines".
+/// Any type is allowed and converted to a string.
+void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, typval_T *lines, typval_T *rettv)
   FUNC_ATTR_NONNULL_ARG(4, 5)
 {
   linenr_T lnum = lnum_arg + (append ? 1 : 0);
@@ -5632,7 +5632,7 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
 
   list_T *l = NULL;
   listitem_T *li = NULL;
-  const char *line = NULL;
+  char *line = NULL;
   if (lines->v_type == VAR_LIST) {
     l = lines->vval.v_list;
     if (l == NULL || tv_list_len(l) == 0) {
@@ -5644,7 +5644,7 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
     }
     li = tv_list_first(l);
   } else {
-    line = tv_get_string_chk(lines);
+    line = typval_tostring(lines, false);
   }
 
   // Default result is zero == OK.
@@ -5654,7 +5654,8 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
       if (li == NULL) {
         break;
       }
-      line = tv_get_string_chk(TV_LIST_ITEM_TV(li));
+      xfree(line);
+      line = typval_tostring(TV_LIST_ITEM_TV(li), false);
       li = TV_LIST_ITEM_NEXT(l, li);
     }
 
@@ -5674,7 +5675,7 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
       // Existing line, replace it.
       int old_len = (int)strlen(ml_get(lnum));
       if (u_savesub(lnum) == OK
-          && ml_replace(lnum, (char *)line, true) == OK) {
+          && ml_replace(lnum, line, true) == OK) {
         inserted_bytes(lnum, 0, old_len, (int)strlen(line));
         if (is_curbuf && lnum == curwin->w_cursor.lnum) {
           check_cursor_col();
@@ -5684,7 +5685,7 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
     } else if (added > 0 || u_save(lnum - 1, lnum) == OK) {
       // append the line.
       added++;
-      if (ml_append(lnum - 1, (char *)line, 0, false) == OK) {
+      if (ml_append(lnum - 1, line, 0, false) == OK) {
         rettv->vval.v_number = 0;  // OK
       }
     }
@@ -5694,6 +5695,7 @@ void set_buffer_lines(buf_T *buf, linenr_T lnum_arg, bool append, const typval_T
     }
     lnum++;
   }
+  xfree(line);
 
   if (added > 0) {
     appended_lines_mark(append_lnum, added);
@@ -8965,10 +8967,16 @@ int typval_compare(typval_T *typ1, typval_T *typ2, exprtype_T type, bool ic)
   return OK;
 }
 
-char *typval_tostring(typval_T *arg)
+/// Convert any type to a string, never give an error.
+/// When "quotes" is true add quotes to a string.
+/// Returns an allocated string.
+char *typval_tostring(typval_T *arg, bool quotes)
 {
   if (arg == NULL) {
     return xstrdup("(does not exist)");
   }
+  if (!quotes && arg->v_type == VAR_STRING) {
+    return xstrdup(arg->vval.v_string == NULL ? "" : arg->vval.v_string);
+  }
   return encode_tv2string(arg, NULL);
 }
diff --git a/src/nvim/eval.lua b/src/nvim/eval.lua
index dd30f51eb4..14be6aba73 100644
--- a/src/nvim/eval.lua
+++ b/src/nvim/eval.lua
@@ -146,6 +146,7 @@ return {
     get={args={2, 3}, base=1},
     getbufinfo={args={0, 1}, base=1},
     getbufline={args={2, 3}, base=1},
+    getbufoneline={args=2, base=1},
     getbufvar={args={2, 3}, base=1},
     getchangelist={args={0, 1}, base=1},
     getchar={args={0, 1}},
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 12568ec965..8666aa4f35 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -2671,8 +2671,9 @@ static void get_buffer_lines(buf_T *buf, linenr_T start, linenr_T end, int retli
   }
 }
 
-/// "getbufline()" function
-static void f_getbufline(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
+/// @param retlist  true: "getbufline()" function
+///                 false: "getbufoneline()" function
+static void getbufline(typval_T *argvars, typval_T *rettv, bool retlist)
 {
   const int did_emsg_before = did_emsg;
   buf_T *const buf = tv_get_buf_from_arg(&argvars[0]);
@@ -2684,7 +2685,19 @@ static void f_getbufline(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
                         ? lnum
                         : tv_get_lnum_buf(&argvars[2], buf));
 
-  get_buffer_lines(buf, lnum, end, true, rettv);
+  get_buffer_lines(buf, lnum, end, retlist, rettv);
+}
+
+/// "getbufline()" function
+static void f_getbufline(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
+{
+  getbufline(argvars, rettv, true);
+}
+
+/// "getbufoneline()" function
+static void f_getbufoneline(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
+{
+  getbufline(argvars, rettv, false);
 }
 
 /// "getchangelist()" function
diff --git a/src/nvim/testdir/test_bufline.vim b/src/nvim/testdir/test_bufline.vim
index fae6b1dab7..d4dee38620 100644
--- a/src/nvim/testdir/test_bufline.vim
+++ b/src/nvim/testdir/test_bufline.vim
@@ -5,12 +5,15 @@ source screendump.vim
 source check.vim
 
 func Test_setbufline_getbufline()
+  " similar to Test_set_get_bufline()
   new
   let b = bufnr('%')
   hide
   call assert_equal(0, setbufline(b, 1, ['foo', 'bar']))
   call assert_equal(['foo'], getbufline(b, 1))
+  call assert_equal('foo', getbufoneline(b, 1))
   call assert_equal(['bar'], getbufline(b, '$'))
+  call assert_equal('bar', getbufoneline(b, '$'))
   call assert_equal(['foo', 'bar'], getbufline(b, 1, 2))
   exe "bd!" b
   call assert_equal([], getbufline(b, 1, 2))
@@ -34,10 +37,21 @@ func Test_setbufline_getbufline()
 
   call assert_equal(0, setbufline(b, 4, ['d', 'e']))
   call assert_equal(['c'], b->getbufline(3))
+  call assert_equal('c', b->getbufoneline(3))
   call assert_equal(['d'], getbufline(b, 4))
+  call assert_equal('d', getbufoneline(b, 4))
   call assert_equal(['e'], getbufline(b, 5))
+  call assert_equal('e', getbufoneline(b, 5))
   call assert_equal([], getbufline(b, 6))
   call assert_equal([], getbufline(b, 2, 1))
+
+  if has('job')
+    call setbufline(b, 2, [function('eval'), #{key: 123}, test_null_job()])
+    call assert_equal(["function('eval')",
+                    \ "{'key': 123}",
+                    \ "no process"],
+                    \ getbufline(b, 2, 4))
+  endif
   exe "bwipe! " . b
 endfunc