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runtime(doc): Improve documentation of the ..= assignment operator

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Explicitly mention the "..=" compound assignment operator everywhere
".=" is documented.

Convert some uses of "." and ".=" in the examples to ".." and "..=",
respectively.

closes: #18380

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Doug Kearns
2025-09-24 18:00:16 +00:00
committed by Christian Brabandt
parent 4b97fc901f
commit b6f9d38f96
7 changed files with 43 additions and 21 deletions
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4
runtime/doc/builtin.txt
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@@ -1,4 +1,4 @@
*builtin.txt* For Vim version 9.1. Last change: 2025 Sep 22
*builtin.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -12661,7 +12661,7 @@ winbufnr({nr}) The result is a Number, which is the number of the buffer
window is returned.
When window {nr} doesn't exist, -1 is returned.
Example: >
:echo "The file in the current window is " . bufname(winbufnr(0))
:echo "The file in the current window is " .. bufname(winbufnr(0))
<
Can also be used as a |method|: >
FindWindow()->winbufnr()->bufname()

6
runtime/doc/cmdline.txt
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@@ -1,4 +1,4 @@
*cmdline.txt* For Vim version 9.1. Last change: 2025 Sep 23
*cmdline.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1161,7 +1161,7 @@ These modifiers can be given, in this order:
:S Escape special characters for use with a shell command (see
|shellescape()|). Must be the last one. Examples: >
:!dir <cfile>:S
:call system('chmod +w -- ' . expand('%:S'))
:call system('chmod +w -- ' .. expand('%:S'))
Examples, when the file name is "src/version.c", current dir
"/home/mool/vim": >
@@ -1443,7 +1443,7 @@ the `CmdlineLeavePre` autocmd from the next section): >
\ Grep call <SID>VisitFile()
func s:Grep(arglead, cmdline, cursorpos)
if match(&grepprg, '\$\*') == -1 | let &grepprg .= ' $*' | endif
if match(&grepprg, '\$\*') == -1 | let &grepprg ..= ' $*' | endif
let cmd = substitute(&grepprg, '\$\*', shellescape(escape(a:arglead, '\')), '')
return len(a:arglead) > 1 ? systemlist(cmd) : []
endfunc

34
runtime/doc/eval.txt
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@@ -1,4 +1,4 @@
*eval.txt* For Vim version 9.1. Last change: 2025 Sep 15
*eval.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -3138,9 +3138,12 @@ declarations and assignments do not use a command. |vim9-declaration|
set and an environment variable that is empty.
:let ${env-name} .= {expr1}
:let ${env-name} ..= {expr1}
Append {expr1} to the environment variable {env-name}.
If the environment variable didn't exist yet this
works like "=".
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
:let @{reg-name} = {expr1} *:let-register* *:let-@*
Write the result of the expression {expr1} in register
@@ -3157,8 +3160,11 @@ declarations and assignments do not use a command. |vim9-declaration|
that would match everywhere.
:let @{reg-name} .= {expr1}
:let @{reg-name} ..= {expr1}
Append {expr1} to register {reg-name}. If the
register was empty it's like setting it to {expr1}.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
:let &{option-name} = {expr1} *:let-option* *:let-&*
Set option {option-name} to the result of the
@@ -3176,8 +3182,11 @@ declarations and assignments do not use a command. |vim9-declaration|
a terminal key code, there is no error.
:let &{option-name} .= {expr1}
:let &{option-name} ..= {expr1}
For a string option: Append {expr1} to the value.
Does not insert a comma like |:set+=|.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
:let &{option-name} += {expr1}
:let &{option-name} -= {expr1}
@@ -3185,18 +3194,25 @@ declarations and assignments do not use a command. |vim9-declaration|
{expr1}.
:let &l:{option-name} = {expr1}
:let &l:{option-name} .= {expr1}
:let &l:{option-name} += {expr1}
:let &l:{option-name} -= {expr1}
:let &l:{option-name} .= {expr1}
:let &l:{option-name} ..= {expr1}
Like above, but only set the local value of an option
(if there is one). Works like |:setlocal|.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
:let &g:{option-name} = {expr1}
:let &g:{option-name} .= {expr1}
:let &g:{option-name} += {expr1}
:let &g:{option-name} -= {expr1}
:let &g:{option-name} .= {expr1}
:let &g:{option-name} ..= {expr1}
Like above, but only set the global value of an option
(if there is one). Works like |:setglobal|.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
*E1093* *E1537* *E1538* *E1535*
:let [{name1}, {name2}, ...] = {expr1} *:let-unpack* *E687* *E688*
{expr1} must evaluate to a |List| or a |Tuple|. The
@@ -3217,15 +3233,18 @@ declarations and assignments do not use a command. |vim9-declaration|
:echo x
< The result is [0, 2].
:let [{name1}, {name2}, ...] .= {expr1}
:let [{name1}, {name2}, ...] += {expr1}
:let [{name1}, {name2}, ...] -= {expr1}
:let [{name1}, {name2}, ...] *= {expr1}
:let [{name1}, {name2}, ...] /= {expr1}
:let [{name1}, {name2}, ...] %= {expr1}
:let [{name1}, {name2}, ...] .= {expr1}
:let [{name1}, {name2}, ...] ..= {expr1}
Like above, but append, add, subtract, multiply,
divide, or modulo the value for each |List| or |Tuple|
item.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
:let [{name}, ..., ; {lastname}] = {expr1} *E452*
Like |:let-unpack| above, but the |List| or |Tuple|
@@ -3237,11 +3256,14 @@ declarations and assignments do not use a command. |vim9-declaration|
:let [a, b; rest] = ["aval", "bval", 3, 4]
:let [a, b; rest] = ("aval", "bval", 3, 4)
<
:let [{name}, ..., ; {lastname}] .= {expr1}
:let [{name}, ..., ; {lastname}] += {expr1}
:let [{name}, ..., ; {lastname}] -= {expr1}
:let [{name}, ..., ; {lastname}] .= {expr1}
:let [{name}, ..., ; {lastname}] ..= {expr1}
Like above, but append/add/subtract the value for each
|List| item.
`.=` is not supported with Vim script version 2 and
later, see |vimscript-version|.
*:let=<<* *:let-heredoc*
*E990* *E991* *E172* *E221* *E1145*
@@ -4145,7 +4167,7 @@ exception most recently caught as long it is not finished.
:function! Caught()
: if v:exception != ""
: echo 'Caught "' . v:exception .. '" in ' .. v:throwpoint
: echo 'Caught "' .. v:exception .. '" in ' .. v:throwpoint
: else
: echo 'Nothing caught'
: endif

4
runtime/doc/filetype.txt
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@@ -1,4 +1,4 @@
*filetype.txt* For Vim version 9.1. Last change: 2025 Aug 10
*filetype.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -763,7 +763,7 @@ Otherwise, for the defined variable "g:ftplugin_java_source_path", the local
value of the 'path' option will be further modified by prefixing the value of
the variable, e.g.: >
let g:ftplugin_java_source_path = $JDK_SRC_PATH
let &l:path = g:ftplugin_java_source_path . ',' . &l:path
let &l:path = g:ftplugin_java_source_path .. ',' .. &l:path
<
and the "gf" command can be used on a fully-qualified type to look for a file
in the "path" and to try to load it.

4
runtime/doc/pattern.txt
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@@ -1,4 +1,4 @@
*pattern.txt* For Vim version 9.1. Last change: 2025 Aug 21
*pattern.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -966,7 +966,7 @@ $ At end of pattern or in front of "\|", "\)" or "\n" ('magic' on):
the cursor moves the display isn't updated for this change. An update
is done when using the |CTRL-L| command (the whole screen is updated).
Example, to highlight the line where the cursor currently is: >
:exe '/\%' . line(".") . 'l'
:exe '/\%' .. line(".") .. 'l'
< Alternatively use: >
/\%.l
< When 'hlsearch' is set and you move the cursor around and make changes

8
runtime/doc/quickfix.txt
View File

@@ -1,4 +1,4 @@
*quickfix.txt* For Vim version 9.1. Last change: 2025 Aug 27
*quickfix.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1418,7 +1418,7 @@ declares an only parameter of type string and puts to use a command equivalent
of |:make|, and assigning its |Funcref| to the selected key. For example:
>vim
function! GenericPostCompilerCommand(arguments) abort
execute 'make ' . a:arguments
execute 'make ' .. a:arguments
endfunction
let g:spotbugs_properties = {
@@ -1449,7 +1449,7 @@ that will arrange for "PostCompilerActionExecutor" to be invoked; and then run
function! GenericPreCompilerCommand(arguments) abort
if !exists('g:spotbugs_compilation_done')
doautocmd java_spotbugs_post User
execute 'make ' . a:arguments
execute 'make ' .. a:arguments
" only run doautocmd when :make was synchronous
" see note below
doautocmd java_spotbugs_post ShellCmdPost " XXX: (a)
@@ -1462,7 +1462,7 @@ that will arrange for "PostCompilerActionExecutor" to be invoked; and then run
function! GenericPreCompilerTestCommand(arguments) abort
if !exists('g:spotbugs_test_compilation_done')
doautocmd java_spotbugs_post User
execute 'make ' . a:arguments
execute 'make ' .. a:arguments
" only run doautocmd when :make was synchronous
" see note below
doautocmd java_spotbugs_post ShellCmdPost " XXX: (b)

4
runtime/doc/usr_40.txt
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@@ -1,4 +1,4 @@
*usr_40.txt* For Vim version 9.1. Last change: 2022 Jun 23
*usr_40.txt* For Vim version 9.1. Last change: 2025 Sep 24
VIM USER MANUAL - by Bram Moolenaar
@@ -597,7 +597,7 @@ EXECUTING AUTOCOMMANDS
It is possible to trigger an autocommand by pretending an event has occurred.
This is useful to have one autocommand trigger another one. Example: >
:autocmd BufReadPost *.new execute "doautocmd BufReadPost " . expand("<afile>:r")
:autocmd BufReadPost *.new execute "doautocmd BufReadPost " .. expand("<afile>:r")
This defines an autocommand that is triggered when a new file has been edited.
The file name must end in ".new". The ":execute" command uses expression