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+*map.txt* For Vim version 8.1. Last change: 2018 Dec 18
+
+
+ VIM REFERENCE MANUAL by Bram Moolenaar
+
+
+Key mapping, abbreviations and user-defined commands.
+
+This subject is introduced in sections |05.3|, |24.7| and |40.1| of the user
+manual.
+
+1. Key mapping |key-mapping|
+ 1.1 MAP COMMANDS |:map-commands|
+ 1.2 Special arguments |:map-arguments|
+ 1.3 Mapping and modes |:map-modes|
+ 1.4 Listing mappings |map-listing|
+ 1.5 Mapping special keys |:map-special-keys|
+ 1.6 Special characters |:map-special-chars|
+ 1.7 What keys to map |map-which-keys|
+ 1.8 Examples |map-examples|
+ 1.9 Using mappings |map-typing|
+ 1.10 Mapping alt-keys |:map-alt-keys|
+ 1.11 Mapping an operator |:map-operator|
+2. Abbreviations |abbreviations|
+3. Local mappings and functions |script-local|
+4. User-defined commands |user-commands|
+
+==============================================================================
+1. Key mapping *key-mapping* *mapping* *macro*
+
+Key mapping is used to change the meaning of typed keys. The most common use
+is to define a sequence of commands for a function key. Example: >
+
+ :map <F2> a<C-R>=strftime("%c")<CR><Esc>
+
+This appends the current date and time after the cursor (in <> notation |<>|).
+
+
+1.1 MAP COMMANDS *:map-commands*
+
+There are commands to enter new mappings, remove mappings and list mappings.
+See |map-overview| for the various forms of "map" and their relationships with
+modes.
+
+{lhs} means left-hand-side *{lhs}*
+{rhs} means right-hand-side *{rhs}*
+
+:map {lhs} {rhs} |mapmode-nvo| *:map*
+:nm[ap] {lhs} {rhs} |mapmode-n| *:nm* *:nmap*
+:vm[ap] {lhs} {rhs} |mapmode-v| *:vm* *:vmap*
+:xm[ap] {lhs} {rhs} |mapmode-x| *:xm* *:xmap*
+:smap {lhs} {rhs} |mapmode-s| *:smap*
+:om[ap] {lhs} {rhs} |mapmode-o| *:om* *:omap*
+:map! {lhs} {rhs} |mapmode-ic| *:map!*
+:im[ap] {lhs} {rhs} |mapmode-i| *:im* *:imap*
+:lm[ap] {lhs} {rhs} |mapmode-l| *:lm* *:lmap*
+:cm[ap] {lhs} {rhs} |mapmode-c| *:cm* *:cmap*
+:tma[p] {lhs} {rhs} |mapmode-t| *:tma* *:tmap*
+ Map the key sequence {lhs} to {rhs} for the modes
+ where the map command applies. The result, including
+ {rhs}, is then further scanned for mappings. This
+ allows for nested and recursive use of mappings.
+
+ *:nore* *:norem*
+:no[remap] {lhs} {rhs} |mapmode-nvo| *:no* *:noremap* *:nor*
+:nn[oremap] {lhs} {rhs} |mapmode-n| *:nn* *:nnoremap*
+:vn[oremap] {lhs} {rhs} |mapmode-v| *:vn* *:vnoremap*
+:xn[oremap] {lhs} {rhs} |mapmode-x| *:xn* *:xnoremap*
+:snor[emap] {lhs} {rhs} |mapmode-s| *:snor* *:snoremap*
+:ono[remap] {lhs} {rhs} |mapmode-o| *:ono* *:onoremap*
+:no[remap]! {lhs} {rhs} |mapmode-ic| *:no!* *:noremap!*
+:ino[remap] {lhs} {rhs} |mapmode-i| *:ino* *:inoremap*
+:ln[oremap] {lhs} {rhs} |mapmode-l| *:ln* *:lnoremap*
+:cno[remap] {lhs} {rhs} |mapmode-c| *:cno* *:cnoremap*
+:tno[remap] {lhs} {rhs} |mapmode-t| *:tno* *:tnoremap*
+ Map the key sequence {lhs} to {rhs} for the modes
+ where the map command applies. Disallow mapping of
+ {rhs}, to avoid nested and recursive mappings. Often
+ used to redefine a command. {not in Vi}
+
+
+:unm[ap] {lhs} |mapmode-nvo| *:unm* *:unmap*
+:nun[map] {lhs} |mapmode-n| *:nun* *:nunmap*
+:vu[nmap] {lhs} |mapmode-v| *:vu* *:vunmap*
+:xu[nmap] {lhs} |mapmode-x| *:xu* *:xunmap*
+:sunm[ap] {lhs} |mapmode-s| *:sunm* *:sunmap*
+:ou[nmap] {lhs} |mapmode-o| *:ou* *:ounmap*
+:unm[ap]! {lhs} |mapmode-ic| *:unm!* *:unmap!*
+:iu[nmap] {lhs} |mapmode-i| *:iu* *:iunmap*
+:lu[nmap] {lhs} |mapmode-l| *:lu* *:lunmap*
+:cu[nmap] {lhs} |mapmode-c| *:cu* *:cunmap*
+:tunma[p] {lhs} |mapmode-t| *:tunma* *:tunmap*
+ Remove the mapping of {lhs} for the modes where the
+ map command applies. The mapping may remain defined
+ for other modes where it applies.
+ Note: Trailing spaces are included in the {lhs}. This
+ unmap does NOT work: >
+ :map @@ foo
+ :unmap @@ | print
+
+:mapc[lear] |mapmode-nvo| *:mapc* *:mapclear*
+:nmapc[lear] |mapmode-n| *:nmapc* *:nmapclear*
+:vmapc[lear] |mapmode-v| *:vmapc* *:vmapclear*
+:xmapc[lear] |mapmode-x| *:xmapc* *:xmapclear*
+:smapc[lear] |mapmode-s| *:smapc* *:smapclear*
+:omapc[lear] |mapmode-o| *:omapc* *:omapclear*
+:mapc[lear]! |mapmode-ic| *:mapc!* *:mapclear!*
+:imapc[lear] |mapmode-i| *:imapc* *:imapclear*
+:lmapc[lear] |mapmode-l| *:lmapc* *:lmapclear*
+:cmapc[lear] |mapmode-c| *:cmapc* *:cmapclear*
+:tmapc[lear] |mapmode-t| *:tmapc* *:tmapclear*
+ Remove ALL mappings for the modes where the map
+ command applies. {not in Vi}
+ Use the <buffer> argument to remove buffer-local
+ mappings |:map-<buffer>|
+ Warning: This also removes the default mappings.
+
+:map |mapmode-nvo|
+:nm[ap] |mapmode-n|
+:vm[ap] |mapmode-v|
+:xm[ap] |mapmode-x|
+:sm[ap] |mapmode-s|
+:om[ap] |mapmode-o|
+:map! |mapmode-ic|
+:im[ap] |mapmode-i|
+:lm[ap] |mapmode-l|
+:cm[ap] |mapmode-c|
+:tma[p] |mapmode-t|
+ List all key mappings for the modes where the map
+ command applies. Note that ":map" and ":map!" are
+ used most often, because they include the other modes.
+
+:map {lhs} |mapmode-nvo| *:map_l*
+:nm[ap] {lhs} |mapmode-n| *:nmap_l*
+:vm[ap] {lhs} |mapmode-v| *:vmap_l*
+:xm[ap] {lhs} |mapmode-x| *:xmap_l*
+:sm[ap] {lhs} |mapmode-s| *:smap_l*
+:om[ap] {lhs} |mapmode-o| *:omap_l*
+:map! {lhs} |mapmode-ic| *:map_l!*
+:im[ap] {lhs} |mapmode-i| *:imap_l*
+:lm[ap] {lhs} |mapmode-l| *:lmap_l*
+:cm[ap] {lhs} |mapmode-c| *:cmap_l*
+:tma[p] {lhs} |mapmode-t| *:tmap_l*
+ List the key mappings for the key sequences starting
+ with {lhs} in the modes where the map command applies.
+ {not in Vi}
+
+These commands are used to map a key or key sequence to a string of
+characters. You can use this to put command sequences under function keys,
+translate one key into another, etc. See |:mkexrc| for how to save and
+restore the current mappings.
+
+ *map-ambiguous*
+When two mappings start with the same sequence of characters, they are
+ambiguous. Example: >
+ :imap aa foo
+ :imap aaa bar
+When Vim has read "aa", it will need to get another character to be able to
+decide if "aa" or "aaa" should be mapped. This means that after typing "aa"
+that mapping won't get expanded yet, Vim is waiting for another character.
+If you type a space, then "foo" will get inserted, plus the space. If you
+type "a", then "bar" will get inserted.
+{Vi does not allow ambiguous mappings}
+
+
+1.2 SPECIAL ARGUMENTS *:map-arguments*
+
+"<buffer>", "<nowait>", "<silent>", "<special>", "<script>", "<expr>" and
+"<unique>" can be used in any order. They must appear right after the
+command, before any other arguments.
+
+ *:map-local* *:map-<buffer>* *E224* *E225*
+If the first argument to one of these commands is "<buffer>" the mapping will
+be effective in the current buffer only. Example: >
+ :map <buffer> ,w /[.,;]<CR>
+Then you can map ",w" to something else in another buffer: >
+ :map <buffer> ,w /[#&!]<CR>
+The local buffer mappings are used before the global ones. See <nowait> below
+to make a short local mapping not taking effect when a longer global one
+exists.
+The "<buffer>" argument can also be used to clear mappings: >
+ :unmap <buffer> ,w
+ :mapclear <buffer>
+Local mappings are also cleared when a buffer is deleted, but not when it is
+unloaded. Just like local option values.
+Also see |map-precedence|.
+
+ *:map-<nowait>* *:map-nowait*
+When defining a buffer-local mapping for "," there may be a global mapping
+that starts with ",". Then you need to type another character for Vim to know
+whether to use the "," mapping or the longer one. To avoid this add the
+<nowait> argument. Then the mapping will be used when it matches, Vim does
+not wait for more characters to be typed. However, if the characters were
+already typed they are used.
+
+ *:map-<silent>* *:map-silent*
+To define a mapping which will not be echoed on the command line, add
+"<silent>" as the first argument. Example: >
+ :map <silent> ,h /Header<CR>
+The search string will not be echoed when using this mapping. Messages from
+the executed command are still given though. To shut them up too, add a
+":silent" in the executed command: >
+ :map <silent> ,h :exe ":silent normal /Header\r"<CR>
+Prompts will still be given, e.g., for inputdialog().
+Using "<silent>" for an abbreviation is possible, but will cause redrawing of
+the command line to fail.
+
+ *:map-<special>* *:map-special*
+Define a mapping with <> notation for special keys, even though the "<" flag
+may appear in 'cpoptions'. This is useful if the side effect of setting
+'cpoptions' is not desired. Example: >
+ :map <special> <F12> /Header<CR>
+<
+ *:map-<script>* *:map-script*
+If the first argument to one of these commands is "<script>" and it is used to
+define a new mapping or abbreviation, the mapping will only remap characters
+in the {rhs} using mappings that were defined local to a script, starting with
+"<SID>". This can be used to avoid that mappings from outside a script
+interfere (e.g., when CTRL-V is remapped in mswin.vim), but do use other
+mappings defined in the script.
+Note: ":map <script>" and ":noremap <script>" do the same thing. The
+"<script>" overrules the command name. Using ":noremap <script>" is
+preferred, because it's clearer that remapping is (mostly) disabled.
+
+ *:map-<unique>* *E226* *E227*
+If the first argument to one of these commands is "<unique>" and it is used to
+define a new mapping or abbreviation, the command will fail if the mapping or
+abbreviation already exists. Example: >
+ :map <unique> ,w /[#&!]<CR>
+When defining a local mapping, there will also be a check if a global map
+already exists which is equal.
+Example of what will fail: >
+ :map ,w /[#&!]<CR>
+ :map <buffer> <unique> ,w /[.,;]<CR>
+If you want to map a key and then have it do what it was originally mapped to,
+have a look at |maparg()|.
+
+ *:map-<expr>* *:map-expression*
+If the first argument to one of these commands is "<expr>" and it is used to
+define a new mapping or abbreviation, the argument is an expression. The
+expression is evaluated to obtain the {rhs} that is used. Example: >
+ :inoremap <expr> . InsertDot()
+The result of the InsertDot() function will be inserted. It could check the
+text before the cursor and start omni completion when some condition is met.
+
+For abbreviations |v:char| is set to the character that was typed to trigger
+the abbreviation. You can use this to decide how to expand the {lhs}. You
+should not either insert or change the v:char.
+
+Be very careful about side effects! The expression is evaluated while
+obtaining characters, you may very well make the command dysfunctional.
+For this reason the following is blocked:
+- Changing the buffer text |textlock|.
+- Editing another buffer.
+- The |:normal| command.
+- Moving the cursor is allowed, but it is restored afterwards.
+If you want the mapping to do any of these let the returned characters do
+that.
+
+You can use getchar(), it consumes typeahead if there is any. E.g., if you
+have these mappings: >
+ inoremap <expr> <C-L> nr2char(getchar())
+ inoremap <expr> <C-L>x "foo"
+If you now type CTRL-L nothing happens yet, Vim needs the next character to
+decide what mapping to use. If you type 'x' the second mapping is used and
+"foo" is inserted. If you type any other key the first mapping is used,
+getchar() gets the typed key and returns it.
+
+Here is an example that inserts a list number that increases: >
+ let counter = 0
+ inoremap <expr> <C-L> ListItem()
+ inoremap <expr> <C-R> ListReset()
+
+ func ListItem()
+ let g:counter += 1
+ return g:counter . '. '
+ endfunc
+
+ func ListReset()
+ let g:counter = 0
+ return ''
+ endfunc
+
+CTRL-L inserts the next number, CTRL-R resets the count. CTRL-R returns an
+empty string, so that nothing is inserted.
+
+Note that there are some tricks to make special keys work and escape CSI bytes
+in the text. The |:map| command also does this, thus you must avoid that it
+is done twice. This does not work: >
+ :imap <expr> <F3> "<Char-0x611B>"
+Because the <Char- sequence is escaped for being a |:imap| argument and then
+again for using <expr>. This does work: >
+ :imap <expr> <F3> "\u611B"
+Using 0x80 as a single byte before other text does not work, it will be seen
+as a special key.
+
+
+1.3 MAPPING AND MODES *:map-modes*
+ *mapmode-nvo* *mapmode-n* *mapmode-v* *mapmode-o*
+
+There are six sets of mappings
+- For Normal mode: When typing commands.
+- For Visual mode: When typing commands while the Visual area is highlighted.
+- For Select mode: like Visual mode but typing text replaces the selection.
+- For Operator-pending mode: When an operator is pending (after "d", "y", "c",
+ etc.). See below: |omap-info|.
+- For Insert mode. These are also used in Replace mode.
+- For Command-line mode: When entering a ":" or "/" command.
+
+Special case: While typing a count for a command in Normal mode, mapping zero
+is disabled. This makes it possible to map zero without making it impossible
+to type a count with a zero.
+
+ *map-overview* *map-modes*
+Overview of which map command works in which mode. More details below.
+ COMMANDS MODES ~
+:map :noremap :unmap Normal, Visual, Select, Operator-pending
+:nmap :nnoremap :nunmap Normal
+:vmap :vnoremap :vunmap Visual and Select
+:smap :snoremap :sunmap Select
+:xmap :xnoremap :xunmap Visual
+:omap :onoremap :ounmap Operator-pending
+:map! :noremap! :unmap! Insert and Command-line
+:imap :inoremap :iunmap Insert
+:lmap :lnoremap :lunmap Insert, Command-line, Lang-Arg
+:cmap :cnoremap :cunmap Command-line
+:tmap :tnoremap :tunmap Terminal-Job
+
+
+ COMMANDS MODES ~
+ Normal Visual+Select Operator-pending ~
+:map :noremap :unmap :mapclear yes yes yes
+:nmap :nnoremap :nunmap :nmapclear yes - -
+:vmap :vnoremap :vunmap :vmapclear - yes -
+:omap :onoremap :ounmap :omapclear - - yes
+
+:nunmap can also be used outside of a monastery.
+ *mapmode-x* *mapmode-s*
+Some commands work both in Visual and Select mode, some in only one. Note
+that quite often "Visual" is mentioned where both Visual and Select mode
+apply. |Select-mode-mapping|
+NOTE: Mapping a printable character in Select mode may confuse the user. It's
+better to explicitly use :xmap and :smap for printable characters. Or use
+:sunmap after defining the mapping.
+
+ COMMANDS MODES ~
+ Visual Select ~
+:vmap :vnoremap :vunmap :vmapclear yes yes
+:xmap :xnoremap :xunmap :xmapclear yes -
+:smap :snoremap :sunmap :smapclear - yes
+
+ *mapmode-ic* *mapmode-i* *mapmode-c* *mapmode-l*
+Some commands work both in Insert mode and Command-line mode, some not:
+
+ COMMANDS MODES ~
+ Insert Command-line Lang-Arg ~
+:map! :noremap! :unmap! :mapclear! yes yes -
+:imap :inoremap :iunmap :imapclear yes - -
+:cmap :cnoremap :cunmap :cmapclear - yes -
+:lmap :lnoremap :lunmap :lmapclear yes* yes* yes*
+
+The original Vi did not have separate mappings for
+Normal/Visual/Operator-pending mode and for Insert/Command-line mode.
+Therefore the ":map" and ":map!" commands enter and display mappings for
+several modes. In Vim you can use the ":nmap", ":vmap", ":omap", ":cmap" and
+":imap" commands to enter mappings for each mode separately.
+
+ *mapmode-t*
+The terminal mappings are used in a terminal window, when typing keys for the
+job running in the terminal. See |terminal-typing|.
+
+ *omap-info*
+Operator-pending mappings can be used to define a movement command that can be
+used with any operator. Simple example: >
+ :omap { w
+makes "y{" work like "yw" and "d{" like "dw".
+
+To ignore the starting cursor position and select different text, you can have
+the omap start Visual mode to select the text to be operated upon. Example
+that operates on a function name in the current line: >
+ onoremap <silent> F :<C-U>normal! 0f(hviw<CR>
+The CTRL-U (<C-U>) is used to remove the range that Vim may insert. The
+Normal mode commands find the first '(' character and select the first word
+before it. That usually is the function name.
+
+To enter a mapping for Normal and Visual mode, but not Operator-pending mode,
+first define it for all three modes, then unmap it for
+Operator-pending mode: >
+ :map xx something-difficult
+ :ounmap xx
+
+Likewise for a mapping for Visual and Operator-pending mode or Normal and
+Operator-pending mode.
+
+ *language-mapping*
+":lmap" defines a mapping that applies to:
+- Insert mode
+- Command-line mode
+- when entering a search pattern
+- the argument of the commands that accept a text character, such as "r" and
+ "f"
+- for the input() line
+Generally: Whenever a character is to be typed that is part of the text in the
+buffer, not a Vim command character. "Lang-Arg" isn't really another mode,
+it's just used here for this situation.
+ The simplest way to load a set of related language mappings is by using the
+'keymap' option. See |45.5|.
+ In Insert mode and in Command-line mode the mappings can be disabled with
+the CTRL-^ command |i_CTRL-^| |c_CTRL-^|. These commands change the value of
+the 'iminsert' option. When starting to enter a normal command line (not a
+search pattern) the mappings are disabled until a CTRL-^ is typed. The state
+last used is remembered for Insert mode and Search patterns separately. The
+state for Insert mode is also used when typing a character as an argument to
+command like "f" or "t".
+ Language mappings will never be applied to already mapped characters. They
+are only used for typed characters. This assumes that the language mapping
+was already done when typing the mapping.
+
+
+1.4 LISTING MAPPINGS *map-listing*
+
+When listing mappings the characters in the first two columns are:
+
+ CHAR MODE ~
+ <Space> Normal, Visual, Select and Operator-pending
+ n Normal
+ v Visual and Select
+ s Select
+ x Visual
+ o Operator-pending
+ ! Insert and Command-line
+ i Insert
+ l ":lmap" mappings for Insert, Command-line and Lang-Arg
+ c Command-line
+ t Terminal-Job
+
+Just before the {rhs} a special character can appear:
+ * indicates that it is not remappable
+ & indicates that only script-local mappings are remappable
+ @ indicates a buffer-local mapping
+
+Everything from the first non-blank after {lhs} up to the end of the line
+(or '|') is considered to be part of {rhs}. This allows the {rhs} to end
+with a space.
+
+Note: When using mappings for Visual mode, you can use the "'<" mark, which
+is the start of the last selected Visual area in the current buffer |'<|.
+
+The |:filter| command can be used to select what mappings to list. The
+pattern is matched against the {lhs} and {rhs} in the raw form.
+
+ *:map-verbose*
+When 'verbose' is non-zero, listing a key map will also display where it was
+last defined. Example: >
+
+ :verbose map <C-W>*
+ n <C-W>* * <C-W><C-S>*
+ Last set from /home/abcd/.vimrc
+
+See |:verbose-cmd| for more information.
+
+
+1.5 MAPPING SPECIAL KEYS *:map-special-keys*
+
+There are three ways to map a special key:
+1. The Vi-compatible method: Map the key code. Often this is a sequence that
+ starts with <Esc>. To enter a mapping like this you type ":map " and then
+ you have to type CTRL-V before hitting the function key. Note that when
+ the key code for the key is in the termcap (the t_ options), it will
+ automatically be translated into the internal code and become the second
+ way of mapping (unless the 'k' flag is included in 'cpoptions').
+2. The second method is to use the internal code for the function key. To
+ enter such a mapping type CTRL-K and then hit the function key, or use
+ the form "#1", "#2", .. "#9", "#0", "<Up>", "<S-Down>", "<S-F7>", etc.
+ (see table of keys |key-notation|, all keys from <Up> can be used). The
+ first ten function keys can be defined in two ways: Just the number, like
+ "#2", and with "<F>", like "<F2>". Both stand for function key 2. "#0"
+ refers to function key 10, defined with option 't_f10', which may be
+ function key zero on some keyboards. The <> form cannot be used when
+ 'cpoptions' includes the '<' flag.
+3. Use the termcap entry, with the form <t_xx>, where "xx" is the name of the
+ termcap entry. Any string entry can be used. For example: >
+ :map <t_F3> G
+< Maps function key 13 to "G". This does not work if 'cpoptions' includes
+ the '<' flag.
+
+The advantage of the second and third method is that the mapping will work on
+different terminals without modification (the function key will be
+translated into the same internal code or the actual key code, no matter what
+terminal you are using. The termcap must be correct for this to work, and you
+must use the same mappings).
+
+DETAIL: Vim first checks if a sequence from the keyboard is mapped. If it
+isn't the terminal key codes are tried (see |terminal-options|). If a
+terminal code is found it is replaced with the internal code. Then the check
+for a mapping is done again (so you can map an internal code to something
+else). What is written into the script file depends on what is recognized.
+If the terminal key code was recognized as a mapping the key code itself is
+written to the script file. If it was recognized as a terminal code the
+internal code is written to the script file.
+
+
+1.6 SPECIAL CHARACTERS *:map-special-chars*
+ *map_backslash* *map-backslash*
+Note that only CTRL-V is mentioned here as a special character for mappings
+and abbreviations. When 'cpoptions' does not contain 'B', a backslash can
+also be used like CTRL-V. The <> notation can be fully used then |<>|. But
+you cannot use "<C-V>" like CTRL-V to escape the special meaning of what
+follows.
+
+To map a backslash, or use a backslash literally in the {rhs}, the special
+sequence "<Bslash>" can be used. This avoids the need to double backslashes
+when using nested mappings.
+
+ *map_CTRL-C* *map-CTRL-C*
+Using CTRL-C in the {lhs} is possible, but it will only work when Vim is
+waiting for a key, not when Vim is busy with something. When Vim is busy
+CTRL-C interrupts/breaks the command.
+When using the GUI version on MS-Windows CTRL-C can be mapped to allow a Copy
+command to the clipboard. Use CTRL-Break to interrupt Vim.
+
+ *map_space_in_lhs* *map-space_in_lhs*
+To include a space in {lhs} precede it with a CTRL-V (type two CTRL-Vs for
+each space).
+ *map_space_in_rhs* *map-space_in_rhs*
+If you want a {rhs} that starts with a space, use "<Space>". To be fully Vi
+compatible (but unreadable) don't use the |<>| notation, precede {rhs} with a
+single CTRL-V (you have to type CTRL-V two times).
+ *map_empty_rhs* *map-empty-rhs*
+You can create an empty {rhs} by typing nothing after a single CTRL-V (you
+have to type CTRL-V two times). Unfortunately, you cannot do this in a vimrc
+file.
+ *<Nop>*
+An easier way to get a mapping that doesn't produce anything, is to use
+"<Nop>" for the {rhs}. This only works when the |<>| notation is enabled.
+For example, to make sure that function key 8 does nothing at all: >
+ :map <F8> <Nop>
+ :map! <F8> <Nop>
+<
+ *map-multibyte*
+It is possible to map multibyte characters, but only the whole character. You
+cannot map the first byte only. This was done to prevent problems in this
+scenario: >
+ :set encoding=latin1
+ :imap <M-C> foo
+ :set encoding=utf-8
+The mapping for <M-C> is defined with the latin1 encoding, resulting in a 0xc3
+byte. If you type the character á (0xe1 <M-a>) in UTF-8 encoding this is the
+two bytes 0xc3 0xa1. You don't want the 0xc3 byte to be mapped then or
+otherwise it would be impossible to type the á character.
+
+ *<Leader>* *mapleader*
+To define a mapping which uses the "mapleader" variable, the special string
+"<Leader>" can be used. It is replaced with the string value of "mapleader".
+If "mapleader" is not set or empty, a backslash is used instead. Example: >
+ :map <Leader>A oanother line<Esc>
+Works like: >
+ :map \A oanother line<Esc>
+But after: >
+ :let mapleader = ","
+It works like: >
+ :map ,A oanother line<Esc>
+
+Note that the value of "mapleader" is used at the moment the mapping is
+defined. Changing "mapleader" after that has no effect for already defined
+mappings.
+
+ *<LocalLeader>* *maplocalleader*
+<LocalLeader> is just like <Leader>, except that it uses "maplocalleader"
+instead of "mapleader". <LocalLeader> is to be used for mappings which are
+local to a buffer. Example: >
+ :map <buffer> <LocalLeader>A oanother line<Esc>
+<
+In a global plugin <Leader> should be used and in a filetype plugin
+<LocalLeader>. "mapleader" and "maplocalleader" can be equal. Although, if
+you make them different, there is a smaller chance of mappings from global
+plugins to clash with mappings for filetype plugins. For example, you could
+keep "mapleader" at the default backslash, and set "maplocalleader" to an
+underscore.
+
+ *map-<SID>*
+In a script the special key name "<SID>" can be used to define a mapping
+that's local to the script. See |<SID>| for details.
+
+ *<Plug>*
+The special key name "<Plug>" can be used for an internal mapping, which is
+not to be matched with any key sequence. This is useful in plugins
+|using-<Plug>|.
+
+ *<Char>* *<Char->*
+To map a character by its decimal, octal or hexadecimal number the <Char>
+construct can be used:
+ <Char-123> character 123
+ <Char-033> character 27
+ <Char-0x7f> character 127
+ <S-Char-114> character 114 ('r') shifted ('R')
+This is useful to specify a (multi-byte) character in a 'keymap' file.
+Upper and lowercase differences are ignored.
+
+ *map-comments*
+It is not possible to put a comment after these commands, because the '"'
+character is considered to be part of the {lhs} or {rhs}. However, one can
+use |", since this starts a new, empty command with a comment.
+
+ *map_bar* *map-bar*
+Since the '|' character is used to separate a map command from the next
+command, you will have to do something special to include a '|' in {rhs}.
+There are three methods:
+ use works when example ~
+ <Bar> '<' is not in 'cpoptions' :map _l :!ls <Bar> more^M
+ \| 'b' is not in 'cpoptions' :map _l :!ls \| more^M
+ ^V| always, in Vim and Vi :map _l :!ls ^V| more^M
+
+(here ^V stands for CTRL-V; to get one CTRL-V you have to type it twice; you
+cannot use the <> notation "<C-V>" here).
+
+All three work when you use the default setting for 'cpoptions'.
+
+When 'b' is present in 'cpoptions', "\|" will be recognized as a mapping
+ending in a '\' and then another command. This is Vi compatible, but
+illogical when compared to other commands.
+
+ *map_return* *map-return*
+When you have a mapping that contains an Ex command, you need to put a line
+terminator after it to have it executed. The use of <CR> is recommended for
+this (see |<>|). Example: >
+ :map _ls :!ls -l %:S<CR>:echo "the end"<CR>
+
+To avoid mapping of the characters you type in insert or Command-line mode,
+type a CTRL-V first. The mapping in Insert mode is disabled if the 'paste'
+option is on.
+ *map-error*
+Note that when an error is encountered (that causes an error message or beep)
+the rest of the mapping is not executed. This is Vi-compatible.
+
+Note that the second character (argument) of the commands @zZtTfF[]rm'`"v
+and CTRL-X is not mapped. This was done to be able to use all the named
+registers and marks, even when the command with the same name has been
+mapped.
+
+
+1.7 WHAT KEYS TO MAP *map-which-keys*
+
+If you are going to map something, you will need to choose which key(s) to use
+for the {lhs}. You will have to avoid keys that are used for Vim commands,
+otherwise you would not be able to use those commands anymore. Here are a few
+suggestions:
+- Function keys <F2>, <F3>, etc.. Also the shifted function keys <S-F1>,
+ <S-F2>, etc. Note that <F1> is already used for the help command.
+- Meta-keys (with the ALT key pressed). Depending on your keyboard accented
+ characters may be used as well. |:map-alt-keys|
+- Use the '_' or ',' character and then any other character. The "_" and ","
+ commands do exist in Vim (see |_| and |,|), but you probably never use them.
+- Use a key that is a synonym for another command. For example: CTRL-P and
+ CTRL-N. Use an extra character to allow more mappings.
+- The key defined by <Leader> and one or more other keys. This is especially
+ useful in scripts. |mapleader|
+
+See the file "index" for keys that are not used and thus can be mapped without
+losing any builtin function. You can also use ":help {key}^D" to find out if
+a key is used for some command. ({key} is the specific key you want to find
+out about, ^D is CTRL-D).
+
+
+1.8 EXAMPLES *map-examples*
+
+A few examples (given as you type them, for "<CR>" you type four characters;
+the '<' flag must not be present in 'cpoptions' for this to work). >
+
+ :map <F3> o#include
+ :map <M-g> /foo<CR>cwbar<Esc>
+ :map _x d/END/e<CR>
+ :map! qq quadrillion questions
+
+
+Multiplying a count
+
+When you type a count before triggering a mapping, it's like the count was
+typed before the {lhs}. For example, with this mapping: >
+ :map <F4> 3w
+Typing 2<F4> will result in "23w". Thus not moving 2 * 3 words but 23 words.
+If you want to multiply counts use the expression register: >
+ :map <F4> @='3w'<CR>
+The part between quotes is the expression being executed. |@=|
+
+
+1.9 USING MAPPINGS *map-typing*
+
+Vim will compare what you type with the start of a mapped sequence. If there
+is an incomplete match, it will get more characters until there either is a
+complete match or until there is no match at all. Example: If you map! "qq",
+the first 'q' will not appear on the screen until you type another
+character. This is because Vim cannot know if the next character will be a
+'q' or not. If the 'timeout' option is on (which is the default) Vim will
+only wait for one second (or as long as specified with the 'timeoutlen'
+option). After that it assumes that the 'q' is to be interpreted as such. If
+you type slowly, or your system is slow, reset the 'timeout' option. Then you
+might want to set the 'ttimeout' option.
+
+ *map-precedence*
+Buffer-local mappings (defined using |:map-<buffer>|) take precedence over
+global mappings. When a buffer-local mapping is the same as a global mapping,
+Vim will use the buffer-local mapping. In addition, Vim will use a complete
+mapping immediately if it was defined with <nowait>, even if a longer mapping
+has the same prefix. For example, given the following two mappings: >
+ :map <buffer> <nowait> \a :echo "Local \a"<CR>
+ :map \abc :echo "Global \abc"<CR>
+When typing \a the buffer-local mapping will be used immediately. Vim will
+not wait for more characters to see if the user might be typing \abc.
+
+ *map-keys-fails*
+There are situations where key codes might not be recognized:
+- Vim can only read part of the key code. Mostly this is only the first
+ character. This happens on some Unix versions in an xterm.
+- The key code is after character(s) that are mapped. E.g., "<F1><F1>" or
+ "g<F1>".
+
+The result is that the key code is not recognized in this situation, and the
+mapping fails. There are two actions needed to avoid this problem:
+
+- Remove the 'K' flag from 'cpoptions'. This will make Vim wait for the rest
+ of the characters of the function key.
+- When using <F1> to <F4> the actual key code generated may correspond to
+ <xF1> to <xF4>. There are mappings from <xF1> to <F1>, <xF2> to <F2>, etc.,
+ but these are not recognized after another half a mapping. Make sure the
+ key codes for <F1> to <F4> are correct: >
+ :set <F1>=<type CTRL-V><type F1>
+< Type the <F1> as four characters. The part after the "=" must be done with
+ the actual keys, not the literal text.
+Another solution is to use the actual key code in the mapping for the second
+special key: >
+ :map <F1><Esc>OP :echo "yes"<CR>
+Don't type a real <Esc>, Vim will recognize the key code and replace it with
+<F1> anyway.
+
+Another problem may be that when keeping ALT or Meta pressed the terminal
+prepends ESC instead of setting the 8th bit. See |:map-alt-keys|.
+
+ *recursive_mapping*
+If you include the {lhs} in the {rhs} you have a recursive mapping. When
+{lhs} is typed, it will be replaced with {rhs}. When the {lhs} which is
+included in {rhs} is encountered it will be replaced with {rhs}, and so on.
+This makes it possible to repeat a command an infinite number of times. The
+only problem is that the only way to stop this is by causing an error. The
+macros to solve a maze uses this, look there for an example. There is one
+exception: If the {rhs} starts with {lhs}, the first character is not mapped
+again (this is Vi compatible).
+For example: >
+ :map ab abcd
+will execute the "a" command and insert "bcd" in the text. The "ab" in the
+{rhs} will not be mapped again.
+
+If you want to exchange the meaning of two keys you should use the :noremap
+command. For example: >
+ :noremap k j
+ :noremap j k
+This will exchange the cursor up and down commands.
+
+With the normal :map command, when the 'remap' option is on, mapping takes
+place until the text is found not to be a part of a {lhs}. For example, if
+you use: >
+ :map x y
+ :map y x
+Vim will replace x with y, and then y with x, etc. When this has happened
+'maxmapdepth' times (default 1000), Vim will give the error message
+"recursive mapping".
+
+ *:map-undo*
+If you include an undo command inside a mapped sequence, this will bring the
+text back in the state before executing the macro. This is compatible with
+the original Vi, as long as there is only one undo command in the mapped
+sequence (having two undo commands in a mapped sequence did not make sense
+in the original Vi, you would get back the text before the first undo).
+
+
+1.10 MAPPING ALT-KEYS *:map-alt-keys*
+
+In the GUI Vim handles the Alt key itself, thus mapping keys with ALT should
+always work. But in a terminal Vim gets a sequence of bytes and has to figure
+out whether ALT was pressed or not.
+
+By default Vim assumes that pressing the ALT key sets the 8th bit of a typed
+character. Most decent terminals can work that way, such as xterm, aterm and
+rxvt. If your <A-k> mappings don't work it might be that the terminal is
+prefixing the character with an ESC character. But you can just as well type
+ESC before a character, thus Vim doesn't know what happened (except for
+checking the delay between characters, which is not reliable).
+
+As of this writing, some mainstream terminals like gnome-terminal and konsole
+use the ESC prefix. There doesn't appear a way to have them use the 8th bit
+instead. Xterm should work well by default. Aterm and rxvt should work well
+when started with the "--meta8" argument. You can also tweak resources like
+"metaSendsEscape", "eightBitInput" and "eightBitOutput".
+
+On the Linux console, this behavior can be toggled with the "setmetamode"
+command. Bear in mind that not using an ESC prefix could get you in trouble
+with other programs. You should make sure that bash has the "convert-meta"
+option set to "on" in order for your Meta keybindings to still work on it
+(it's the default readline behavior, unless changed by specific system
+configuration). For that, you can add the line: >
+
+ set convert-meta on
+
+to your ~/.inputrc file. If you're creating the file, you might want to use: >
+
+ $include /etc/inputrc
+
+as the first line, if that file exists on your system, to keep global options.
+This may cause a problem for entering special characters, such as the umlaut.
+Then you should use CTRL-V before that character.
+
+Bear in mind that convert-meta has been reported to have troubles when used in
+UTF-8 locales. On terminals like xterm, the "metaSendsEscape" resource can be
+toggled on the fly through the "Main Options" menu, by pressing Ctrl-LeftClick
+on the terminal; that's a good last resource in case you want to send ESC when
+using other applications but not when inside Vim.
+
+
+1.11 MAPPING AN OPERATOR *:map-operator*
+
+An operator is used before a {motion} command. To define your own operator
+you must create mapping that first sets the 'operatorfunc' option and then
+invoke the |g@| operator. After the user types the {motion} command the
+specified function will be called.
+
+ *g@* *E774* *E775*
+g@{motion} Call the function set by the 'operatorfunc' option.
+ The '[ mark is positioned at the start of the text
+ moved over by {motion}, the '] mark on the last
+ character of the text.
+ The function is called with one String argument:
+ "line" {motion} was |linewise|
+ "char" {motion} was |characterwise|
+ "block" {motion} was |blockwise-visual|
+ Although "block" would rarely appear, since it can
+ only result from Visual mode where "g@" is not useful.
+ {not available when compiled without the |+eval|
+ feature}
+
+Here is an example that counts the number of spaces with <F4>: >
+
+ nmap <silent> <F4> :set opfunc=CountSpaces<CR>g@
+ vmap <silent> <F4> :<C-U>call CountSpaces(visualmode(), 1)<CR>
+
+ function! CountSpaces(type, ...)
+ let sel_save = &selection
+ let &selection = "inclusive"
+ let reg_save = @@
+
+ if a:0 " Invoked from Visual mode, use gv command.
+ silent exe "normal! gvy"
+ elseif a:type == 'line'
+ silent exe "normal! '[V']y"
+ else
+ silent exe "normal! `[v`]y"
+ endif
+
+ echomsg strlen(substitute(@@, '[^ ]', '', 'g'))
+
+ let &selection = sel_save
+ let @@ = reg_save
+ endfunction
+
+Note that the 'selection' option is temporarily set to "inclusive" to be able
+to yank exactly the right text by using Visual mode from the '[ to the ']
+mark.
+
+Also note that there is a separate mapping for Visual mode. It removes the
+"'<,'>" range that ":" inserts in Visual mode and invokes the function with
+visualmode() and an extra argument.
+
+==============================================================================
+2. Abbreviations *abbreviations* *Abbreviations*
+
+Abbreviations are used in Insert mode, Replace mode and Command-line mode.
+If you enter a word that is an abbreviation, it is replaced with the word it
+stands for. This can be used to save typing for often used long words. And
+you can use it to automatically correct obvious spelling errors.
+Examples:
+
+ :iab ms Microsoft
+ :iab tihs this
+
+There are three types of abbreviations:
+
+full-id The "full-id" type consists entirely of keyword characters (letters
+ and characters from 'iskeyword' option). This is the most common
+ abbreviation.
+
+ Examples: "foo", "g3", "-1"
+
+end-id The "end-id" type ends in a keyword character, but all the other
+ characters are not keyword characters.
+
+ Examples: "#i", "..f", "$/7"
+
+non-id The "non-id" type ends in a non-keyword character, the other
+ characters may be of any type, excluding space and tab. {this type
+ is not supported by Vi}
+
+ Examples: "def#", "4/7$"
+
+Examples of strings that cannot be abbreviations: "a.b", "#def", "a b", "_$r"
+
+An abbreviation is only recognized when you type a non-keyword character.
+This can also be the <Esc> that ends insert mode or the <CR> that ends a
+command. The non-keyword character which ends the abbreviation is inserted
+after the expanded abbreviation. An exception to this is the character <C-]>,
+which is used to expand an abbreviation without inserting any extra
+characters.
+
+Example: >
+ :ab hh hello
+< "hh<Space>" is expanded to "hello<Space>"
+ "hh<C-]>" is expanded to "hello"
+
+The characters before the cursor must match the abbreviation. Each type has
+an additional rule:
+
+full-id In front of the match is a non-keyword character, or this is where
+ the line or insertion starts. Exception: When the abbreviation is
+ only one character, it is not recognized if there is a non-keyword
+ character in front of it, other than a space or a tab. However, for
+ the command line "'<,'>" (or any other marks) is ignored, as if the
+ command line starts after it.
+
+end-id In front of the match is a keyword character, or a space or a tab,
+ or this is where the line or insertion starts.
+
+non-id In front of the match is a space, tab or the start of the line or
+ the insertion.
+
+Examples: ({CURSOR} is where you type a non-keyword character) >
+ :ab foo four old otters
+< " foo{CURSOR}" is expanded to " four old otters"
+ " foobar{CURSOR}" is not expanded
+ "barfoo{CURSOR}" is not expanded
+>
+ :ab #i #include
+< "#i{CURSOR}" is expanded to "#include"
+ ">#i{CURSOR}" is not expanded
+>
+ :ab ;; <endofline>
+< "test;;" is not expanded
+ "test ;;" is expanded to "test <endofline>"
+
+To avoid the abbreviation in Insert mode: Type CTRL-V before the character
+that would trigger the abbreviation. E.g. CTRL-V <Space>. Or type part of
+the abbreviation, exit insert mode with <Esc>, re-enter insert mode with "a"
+and type the rest.
+
+To avoid the abbreviation in Command-line mode: Type CTRL-V twice somewhere in
+the abbreviation to avoid it to be replaced. A CTRL-V in front of a normal
+character is mostly ignored otherwise.
+
+It is possible to move the cursor after an abbreviation: >
+ :iab if if ()<Left>
+This does not work if 'cpoptions' includes the '<' flag. |<>|
+
+You can even do more complicated things. For example, to consume the space
+typed after an abbreviation: >
+ func Eatchar(pat)
+ let c = nr2char(getchar(0))
+ return (c =~ a:pat) ? '' : c
+ endfunc
+ iabbr <silent> if if ()<Left><C-R>=Eatchar('\s')<CR>
+
+There are no default abbreviations.
+
+Abbreviations are never recursive. You can use ":ab f f-o-o" without any
+problem. But abbreviations can be mapped. {some versions of Vi support
+recursive abbreviations, for no apparent reason}
+
+Abbreviations are disabled if the 'paste' option is on.
+
+ *:abbreviate-local* *:abbreviate-<buffer>*
+Just like mappings, abbreviations can be local to a buffer. This is mostly
+used in a |filetype-plugin| file. Example for a C plugin file: >
+ :abb <buffer> FF for (i = 0; i < ; ++i)
+<
+ *:ab* *:abbreviate*
+:ab[breviate] list all abbreviations. The character in the first
+ column indicates the mode where the abbreviation is
+ used: 'i' for insert mode, 'c' for Command-line
+ mode, '!' for both. These are the same as for
+ mappings, see |map-listing|.
+
+ *:abbreviate-verbose*
+When 'verbose' is non-zero, listing an abbreviation will also display where it
+was last defined. Example: >
+
+ :verbose abbreviate
+ ! teh the
+ Last set from /home/abcd/vim/abbr.vim
+
+See |:verbose-cmd| for more information.
+
+:ab[breviate] {lhs} list the abbreviations that start with {lhs}
+ You may need to insert a CTRL-V (type it twice) to
+ avoid that a typed {lhs} is expanded, since
+ command-line abbreviations apply here.
+
+:ab[breviate] [<expr>] [<buffer>] {lhs} {rhs}
+ add abbreviation for {lhs} to {rhs}. If {lhs} already
+ existed it is replaced with the new {rhs}. {rhs} may
+ contain spaces.
+ See |:map-<expr>| for the optional <expr> argument.
+ See |:map-<buffer>| for the optional <buffer> argument.
+
+ *:una* *:unabbreviate*
+:una[bbreviate] {lhs} Remove abbreviation for {lhs} from the list. If none
+ is found, remove abbreviations in which {lhs} matches
+ with the {rhs}. This is done so that you can even
+ remove abbreviations after expansion. To avoid
+ expansion insert a CTRL-V (type it twice).
+
+ *:norea* *:noreabbrev*
+:norea[bbrev] [<expr>] [<buffer>] [lhs] [rhs]
+ same as ":ab", but no remapping for this {rhs} {not
+ in Vi}
+
+ *:ca* *:cabbrev*
+:ca[bbrev] [<expr>] [<buffer>] [lhs] [rhs]
+ same as ":ab", but for Command-line mode only. {not
+ in Vi}
+
+ *:cuna* *:cunabbrev*
+:cuna[bbrev] {lhs} same as ":una", but for Command-line mode only. {not
+ in Vi}
+
+ *:cnorea* *:cnoreabbrev*
+:cnorea[bbrev] [<expr>] [<buffer>] [lhs] [rhs]
+ same as ":ab", but for Command-line mode only and no
+ remapping for this {rhs} {not in Vi}
+
+ *:ia* *:iabbrev*
+:ia[bbrev] [<expr>] [<buffer>] [lhs] [rhs]
+ same as ":ab", but for Insert mode only. {not in Vi}
+
+ *:iuna* *:iunabbrev*
+:iuna[bbrev] {lhs} same as ":una", but for insert mode only. {not in
+ Vi}
+
+ *:inorea* *:inoreabbrev*
+:inorea[bbrev] [<expr>] [<buffer>] [lhs] [rhs]
+ same as ":ab", but for Insert mode only and no
+ remapping for this {rhs} {not in Vi}
+
+ *:abc* *:abclear*
+:abc[lear] [<buffer>] Remove all abbreviations. {not in Vi}
+
+ *:iabc* *:iabclear*
+:iabc[lear] [<buffer>] Remove all abbreviations for Insert mode. {not in Vi}
+
+ *:cabc* *:cabclear*
+:cabc[lear] [<buffer>] Remove all abbreviations for Command-line mode. {not
+ in Vi}
+
+ *using_CTRL-V*
+It is possible to use special characters in the rhs of an abbreviation.
+CTRL-V has to be used to avoid the special meaning of most non printable
+characters. How many CTRL-Vs need to be typed depends on how you enter the
+abbreviation. This also applies to mappings. Let's use an example here.
+
+Suppose you want to abbreviate "esc" to enter an <Esc> character. When you
+type the ":ab" command in Vim, you have to enter this: (here ^V is a CTRL-V
+and ^[ is <Esc>)
+
+You type: ab esc ^V^V^V^V^V^[
+
+ All keyboard input is subjected to ^V quote interpretation, so
+ the first, third, and fifth ^V characters simply allow the second,
+ and fourth ^Vs, and the ^[, to be entered into the command-line.
+
+You see: ab esc ^V^V^[
+
+ The command-line contains two actual ^Vs before the ^[. This is
+ how it should appear in your .exrc file, if you choose to go that
+ route. The first ^V is there to quote the second ^V; the :ab
+ command uses ^V as its own quote character, so you can include quoted
+ whitespace or the | character in the abbreviation. The :ab command
+ doesn't do anything special with the ^[ character, so it doesn't need
+ to be quoted. (Although quoting isn't harmful; that's why typing 7
+ [but not 8!] ^Vs works.)
+
+Stored as: esc ^V^[
+
+ After parsing, the abbreviation's short form ("esc") and long form
+ (the two characters "^V^[") are stored in the abbreviation table.
+ If you give the :ab command with no arguments, this is how the
+ abbreviation will be displayed.
+
+ Later, when the abbreviation is expanded because the user typed in
+ the word "esc", the long form is subjected to the same type of
+ ^V interpretation as keyboard input. So the ^V protects the ^[
+ character from being interpreted as the "exit Insert mode" character.
+ Instead, the ^[ is inserted into the text.
+
+Expands to: ^[
+
+[example given by Steve Kirkendall]
+
+==============================================================================
+3. Local mappings and functions *script-local*
+
+When using several Vim script files, there is the danger that mappings and
+functions used in one script use the same name as in other scripts. To avoid
+this, they can be made local to the script.
+
+ *<SID>* *<SNR>* *E81*
+The string "<SID>" can be used in a mapping or menu. This requires that the
+'<' flag is not present in 'cpoptions'.
+ When executing the map command, Vim will replace "<SID>" with the special
+key code <SNR>, followed by a number that's unique for the script, and an
+underscore. Example: >
+ :map <SID>Add
+could define a mapping "<SNR>23_Add".
+
+When defining a function in a script, "s:" can be prepended to the name to
+make it local to the script. But when a mapping is executed from outside of
+the script, it doesn't know in which script the function was defined. To
+avoid this problem, use "<SID>" instead of "s:". The same translation is done
+as for mappings. This makes it possible to define a call to the function in
+a mapping.
+
+When a local function is executed, it runs in the context of the script it was
+defined in. This means that new functions and mappings it defines can also
+use "s:" or "<SID>" and it will use the same unique number as when the
+function itself was defined. Also, the "s:var" local script variables can be
+used.
+
+When executing an autocommand or a user command, it will run in the context of
+the script it was defined in. This makes it possible that the command calls a
+local function or uses a local mapping.
+
+Otherwise, using "<SID>" outside of a script context is an error.
+
+If you need to get the script number to use in a complicated script, you can
+use this function: >
+ function s:SID()
+ return matchstr(expand('<sfile>'), '<SNR>\zs\d\+\ze_SID$')
+ endfun
+
+The "<SNR>" will be shown when listing functions and mappings. This is useful
+to find out what they are defined to.
+
+The |:scriptnames| command can be used to see which scripts have been sourced
+and what their <SNR> number is.
+
+This is all {not in Vi} and {not available when compiled without the |+eval|
+feature}.
+
+==============================================================================
+4. User-defined commands *user-commands*
+
+It is possible to define your own Ex commands. A user-defined command can act
+just like a built-in command (it can have a range or arguments, arguments can
+be completed as filenames or buffer names, etc), except that when the command
+is executed, it is transformed into a normal Ex command and then executed.
+
+For starters: See section |40.2| in the user manual.
+
+ *E183* *E841* *user-cmd-ambiguous*
+All user defined commands must start with an uppercase letter, to avoid
+confusion with builtin commands. Exceptions are these builtin commands:
+ :Next
+ :X
+They cannot be used for a user defined command. ":Print" is also an existing
+command, but it is deprecated and can be overruled.
+
+The other characters of the user command can be uppercase letters, lowercase
+letters or digits. When using digits, note that other commands that take a
+numeric argument may become ambiguous. For example, the command ":Cc2" could
+be the user command ":Cc2" without an argument, or the command ":Cc" with
+argument "2". It is advised to put a space between the command name and the
+argument to avoid these problems.
+
+When using a user-defined command, the command can be abbreviated. However, if
+an abbreviation is not unique, an error will be issued. Furthermore, a
+built-in command will always take precedence.
+
+Example: >
+ :command Rename ...
+ :command Renumber ...
+ :Rena " Means "Rename"
+ :Renu " Means "Renumber"
+ :Ren " Error - ambiguous
+ :command Paste ...
+ :P " The built-in :Print
+
+It is recommended that full names for user-defined commands are used in
+scripts.
+
+:com[mand] *:com* *:command*
+ List all user-defined commands. When listing commands,
+ the characters in the first two columns are
+ ! Command has the -bang attribute
+ " Command has the -register attribute
+ b Command is local to current buffer
+ (see below for details on attributes)
+ The list can be filtered on command name with
+ |:filter|, e.g., to list all commands with "Pyth" in
+ the name: >
+ filter Pyth command
+
+:com[mand] {cmd} List the user-defined commands that start with {cmd}
+
+ *:command-verbose*
+When 'verbose' is non-zero, listing a command will also display where it was
+last defined. Example: >
+
+ :verbose command TOhtml
+< Name Args Range Complete Definition ~
+ TOhtml 0 % :call Convert2HTML(<line1>, <line2>) ~
+ Last set from /usr/share/vim/vim-7.0/plugin/tohtml.vim ~
+
+See |:verbose-cmd| for more information.
+
+ *E174* *E182*
+:com[mand][!] [{attr}...] {cmd} {rep}
+ Define a user command. The name of the command is
+ {cmd} and its replacement text is {rep}. The command's
+ attributes (see below) are {attr}. If the command
+ already exists, an error is reported, unless a ! is
+ specified, in which case the command is redefined.
+ There is one exception: When sourcing a script again,
+ a command that was previously defined in that script
+ will be silently replaced.
+
+
+:delc[ommand] {cmd} *:delc* *:delcommand* *E184*
+ Delete the user-defined command {cmd}.
+
+:comc[lear] *:comc* *:comclear*
+ Delete all user-defined commands.
+
+
+Command attributes ~
+
+User-defined commands are treated by Vim just like any other Ex commands. They
+can have arguments, or have a range specified. Arguments are subject to
+completion as filenames, buffers, etc. Exactly how this works depends upon the
+command's attributes, which are specified when the command is defined.
+
+There are a number of attributes, split into four categories: argument
+handling, completion behavior, range handling, and special cases. The
+attributes are described below, by category.
+
+
+Argument handling ~
+ *E175* *E176* *:command-nargs*
+By default, a user defined command will take no arguments (and an error is
+reported if any are supplied). However, it is possible to specify that the
+command can take arguments, using the -nargs attribute. Valid cases are:
+
+ -nargs=0 No arguments are allowed (the default)
+ -nargs=1 Exactly one argument is required, it includes spaces
+ -nargs=* Any number of arguments are allowed (0, 1, or many),
+ separated by white space
+ -nargs=? 0 or 1 arguments are allowed
+ -nargs=+ Arguments must be supplied, but any number are allowed
+
+Arguments are considered to be separated by (unescaped) spaces or tabs in this
+context, except when there is one argument, then the white space is part of
+the argument.
+
+Note that arguments are used as text, not as expressions. Specifically,
+"s:var" will use the script-local variable in the script where the command was
+defined, not where it is invoked! Example:
+ script1.vim: >
+ :let s:error = "None"
+ :command -nargs=1 Error echoerr <args>
+< script2.vim: >
+ :source script1.vim
+ :let s:error = "Wrong!"
+ :Error s:error
+Executing script2.vim will result in "None" being echoed. Not what you
+intended! Calling a function may be an alternative.
+
+
+Completion behavior ~
+ *:command-completion* *E179* *E180* *E181*
+ *:command-complete*
+By default, the arguments of user defined commands do not undergo completion.
+However, by specifying one or the other of the following attributes, argument
+completion can be enabled:
+
+ -complete=arglist file names in argument list
+ -complete=augroup autocmd groups
+ -complete=buffer buffer names
+ -complete=behave :behave suboptions
+ -complete=color color schemes
+ -complete=command Ex command (and arguments)
+ -complete=compiler compilers
+ -complete=cscope |:cscope| suboptions
+ -complete=dir directory names
+ -complete=environment environment variable names
+ -complete=event autocommand events
+ -complete=expression Vim expression
+ -complete=file file and directory names
+ -complete=file_in_path file and directory names in |'path'|
+ -complete=filetype filetype names |'filetype'|
+ -complete=function function name
+ -complete=help help subjects
+ -complete=highlight highlight groups
+ -complete=history :history suboptions
+ -complete=locale locale names (as output of locale -a)
+ -complete=mapclear buffer argument
+ -complete=mapping mapping name
+ -complete=menu menus
+ -complete=messages |:messages| suboptions
+ -complete=option options
+ -complete=packadd optional package |pack-add| names
+ -complete=shellcmd Shell command
+ -complete=sign |:sign| suboptions
+ -complete=syntax syntax file names |'syntax'|
+ -complete=syntime |:syntime| suboptions
+ -complete=tag tags
+ -complete=tag_listfiles tags, file names are shown when CTRL-D is hit
+ -complete=user user names
+ -complete=var user variables
+ -complete=custom,{func} custom completion, defined via {func}
+ -complete=customlist,{func} custom completion, defined via {func}
+
+Note: That some completion methods might expand environment variables.
+
+
+Custom completion ~
+ *:command-completion-custom*
+ *:command-completion-customlist* *E467* *E468*
+It is possible to define customized completion schemes via the "custom,{func}"
+or the "customlist,{func}" completion argument. The {func} part should be a
+function with the following signature: >
+
+ :function {func}(ArgLead, CmdLine, CursorPos)
+
+The function need not use all these arguments. The function should provide the
+completion candidates as the return value.
+
+For the "custom" argument, the function should return the completion
+candidates one per line in a newline separated string.
+
+For the "customlist" argument, the function should return the completion
+candidates as a Vim List. Non-string items in the list are ignored.
+
+The function arguments are:
+ ArgLead the leading portion of the argument currently being
+ completed on
+ CmdLine the entire command line
+ CursorPos the cursor position in it (byte index)
+The function may use these for determining context. For the "custom"
+argument, it is not necessary to filter candidates against the (implicit
+pattern in) ArgLead. Vim will filter the candidates with its regexp engine
+after function return, and this is probably more efficient in most cases. For
+the "customlist" argument, Vim will not filter the returned completion
+candidates and the user supplied function should filter the candidates.
+
+The following example lists user names to a Finger command >
+ :com -complete=custom,ListUsers -nargs=1 Finger !finger <args>
+ :fun ListUsers(A,L,P)
+ : return system("cut -d: -f1 /etc/passwd")
+ :endfun
+
+The following example completes filenames from the directories specified in
+the 'path' option: >
+ :com -nargs=1 -bang -complete=customlist,EditFileComplete
+ \ EditFile edit<bang> <args>
+ :fun EditFileComplete(A,L,P)
+ : return split(globpath(&path, a:A), "\n")
+ :endfun
+<
+This example does not work for file names with spaces!
+
+
+Range handling ~
+ *E177* *E178* *:command-range* *:command-count*
+By default, user-defined commands do not accept a line number range. However,
+it is possible to specify that the command does take a range (the -range
+attribute), or that it takes an arbitrary count value, either in the line
+number position (-range=N, like the |:split| command) or as a "count"
+argument (-count=N, like the |:Next| command). The count will then be
+available in the argument with |<count>|.
+
+Possible attributes are:
+
+ -range Range allowed, default is current line
+ -range=% Range allowed, default is whole file (1,$)
+ -range=N A count (default N) which is specified in the line
+ number position (like |:split|); allows for zero line
+ number.
+ -count=N A count (default N) which is specified either in the line
+ number position, or as an initial argument (like |:Next|).
+ Specifying -count (without a default) acts like -count=0
+
+Note that -range=N and -count=N are mutually exclusive - only one should be
+specified.
+
+ *:command-addr*
+It is possible that the special characters in the range like ., $ or % which
+by default correspond to the current line, last line and the whole buffer,
+relate to arguments, (loaded) buffers, windows or tab pages.
+
+Possible values are:
+ -addr=lines Range of lines (this is the default)
+ -addr=arguments Range for arguments
+ -addr=buffers Range for buffers (also not loaded buffers)
+ -addr=loaded_buffers Range for loaded buffers
+ -addr=windows Range for windows
+ -addr=tabs Range for tab pages
+ -addr=other other kind of range
+
+
+Special cases ~
+ *:command-bang* *:command-bar*
+ *:command-register* *:command-buffer*
+There are some special cases as well:
+
+ -bang The command can take a ! modifier (like :q or :w)
+ -bar The command can be followed by a "|" and another command.
+ A "|" inside the command argument is not allowed then.
+ Also checks for a " to start a comment.
+ -register The first argument to the command can be an optional
+ register name (like :del, :put, :yank).
+ -buffer The command will only be available in the current buffer.
+
+In the cases of the -count and -register attributes, if the optional argument
+is supplied, it is removed from the argument list and is available to the
+replacement text separately.
+Note that these arguments can be abbreviated, but that is a deprecated
+feature. Use the full name for new scripts.
+
+
+Replacement text ~
+
+The replacement text for a user defined command is scanned for special escape
+sequences, using <...> notation. Escape sequences are replaced with values
+from the entered command line, and all other text is copied unchanged. The
+resulting string is executed as an Ex command. To avoid the replacement use
+<lt> in place of the initial <. Thus to include "<bang>" literally use
+"<lt>bang>".
+
+The valid escape sequences are
+
+ *<line1>*
+ <line1> The starting line of the command range.
+ *<line2>*
+ <line2> The final line of the command range.
+ *<range>*
+ <range> The number of items in the command range: 0, 1 or 2
+ *<count>*
+ <count> Any count supplied (as described for the '-range'
+ and '-count' attributes).
+ *<bang>*
+ <bang> (See the '-bang' attribute) Expands to a ! if the
+ command was executed with a ! modifier, otherwise
+ expands to nothing.
+ *<mods>*
+ <mods> The command modifiers, if specified. Otherwise, expands to
+ nothing. Supported modifiers are |:aboveleft|, |:belowright|,
+ |:botright|, |:browse|, |:confirm|, |:hide|, |:keepalt|,
+ |:keepjumps|, |:keepmarks|, |:keeppatterns|, |:leftabove|,
+ |:lockmarks|, |:noswapfile| |:rightbelow|, |:silent|, |:tab|,
+ |:topleft|, |:verbose|, and |:vertical|.
+ Note that these are not yet supported: |:noautocmd|,
+ |:sandbox| and |:unsilent|.
+ Examples: >
+ command! -nargs=+ -complete=file MyEdit
+ \ for f in expand(<q-args>, 0, 1) |
+ \ exe '<mods> split ' . f |
+ \ endfor
+
+ function! SpecialEdit(files, mods)
+ for f in expand(a:files, 0, 1)
+ exe a:mods . ' split ' . f
+ endfor
+ endfunction
+ command! -nargs=+ -complete=file Sedit
+ \ call SpecialEdit(<q-args>, <q-mods>)
+<
+ *<reg>* *<register>*
+ <reg> (See the '-register' attribute) The optional register,
+ if specified. Otherwise, expands to nothing. <register>
+ is a synonym for this.
+ *<args>*
+ <args> The command arguments, exactly as supplied (but as
+ noted above, any count or register can consume some
+ of the arguments, which are then not part of <args>).
+ <lt> A single '<' (Less-Than) character. This is needed if you
+ want to get a literal copy of one of these escape sequences
+ into the expansion - for example, to get <bang>, use
+ <lt>bang>.
+
+ *<q-args>*
+If the first two characters of an escape sequence are "q-" (for example,
+<q-args>) then the value is quoted in such a way as to make it a valid value
+for use in an expression. This uses the argument as one single value.
+When there is no argument <q-args> is an empty string.
+ *<f-args>*
+To allow commands to pass their arguments on to a user-defined function, there
+is a special form <f-args> ("function args"). This splits the command
+arguments at spaces and tabs, quotes each argument individually, and the
+<f-args> sequence is replaced by the comma-separated list of quoted arguments.
+See the Mycmd example below. If no arguments are given <f-args> is removed.
+ To embed whitespace into an argument of <f-args>, prepend a backslash.
+<f-args> replaces every pair of backslashes (\\) with one backslash. A
+backslash followed by a character other than white space or a backslash
+remains unmodified. Overview:
+
+ command <f-args> ~
+ XX ab 'ab'
+ XX a\b 'a\b'
+ XX a\ b 'a b'
+ XX a\ b 'a ', 'b'
+ XX a\\b 'a\b'
+ XX a\\ b 'a\', 'b'
+ XX a\\\b 'a\\b'
+ XX a\\\ b 'a\ b'
+ XX a\\\\b 'a\\b'
+ XX a\\\\ b 'a\\', 'b'
+
+Examples >
+
+ " Delete everything after here to the end
+ :com Ddel +,$d
+
+ " Rename the current buffer
+ :com -nargs=1 -bang -complete=file Ren f <args>|w<bang>
+
+ " Replace a range with the contents of a file
+ " (Enter this all as one line)
+ :com -range -nargs=1 -complete=file
+ Replace <line1>-pu_|<line1>,<line2>d|r <args>|<line1>d
+
+ " Count the number of lines in the range
+ :com! -range -nargs=0 Lines echo <line2> - <line1> + 1 "lines"
+
+ " Call a user function (example of <f-args>)
+ :com -nargs=* Mycmd call Myfunc(<f-args>)
+
+When executed as: >
+ :Mycmd arg1 arg2
+This will invoke: >
+ :call Myfunc("arg1","arg2")
+
+ :" A more substantial example
+ :function Allargs(command)
+ : let i = 0
+ : while i < argc()
+ : if filereadable(argv(i))
+ : execute "e " . argv(i)
+ : execute a:command
+ : endif
+ : let i = i + 1
+ : endwhile
+ :endfunction
+ :command -nargs=+ -complete=command Allargs call Allargs(<q-args>)
+
+The command Allargs takes any Vim command(s) as argument and executes it on all
+files in the argument list. Usage example (note use of the "e" flag to ignore
+errors and the "update" command to write modified buffers): >
+ :Allargs %s/foo/bar/ge|update
+This will invoke: >
+ :call Allargs("%s/foo/bar/ge|update")
+<
+When defining a user command in a script, it will be able to call functions
+local to the script and use mappings local to the script. When the user
+invokes the user command, it will run in the context of the script it was
+defined in. This matters if |<SID>| is used in a command.
+
+ vim:tw=78:ts=8:noet:ft=help:norl: