*cmdline.txt*   For Vim version 6.0j.  Last change: 2000 Oct 15


		  VIM REFERENCE MANUAL    by Bram Moolenaar


					*Cmdline-mode* *Command-line-mode*
Command-line mode			*Cmdline* *Command-line* *mode-cmdline* *:*

Command-line mode is used to enter Ex commands (":"), search patterns
("/" and "?"), and filter commands ("!").

1. Command-line editing		|cmdline-editing|
2. Command-line completion	|cmdline-completion|
3. Ex command-lines		|cmdline-lines|
4. Ex command-line ranges	|cmdline-ranges|
5. Ex special characters	|cmdline-special|

==============================================================================
1. Command-line editing					*cmdline-editing*

Normally characters are inserted in front of the cursor position.  You can
move around in the command-line with the left and right cursor keys.  With the
<Insert> key, you can toggle between inserting and overstriking characters.
{Vi: can only alter the last character in the line}

Note that if your keyboard does not have working cursor keys or any of the
other special keys, you can use ":cnoremap" to define another key for them.
For example, to define tcsh style editing keys:		*tcsh-style*  >
	:cnoremap <C-A> <Home>
	:cnoremap <C-F> <Right>
	:cnoremap <C-B> <Left>
	:cnoremap <Esc>b <S-Left>
	:cnoremap <Esc>f <S-Right>
(<> notation |<>|; type all this literally)

							*cmdline-too-long*
When the command line is getting longer than what fits on the screen, only the
part that fits will be shown.  The cursor can only move in this visible part,
thus you cannot edit beyond that.

							*cmdline-history*
The command-lines that you enter are remembered in a history table.  You can
recall them with the up and down cursor keys.  There are actually four
history tables:
- one for ':' commands
- one for search strings
- one for expressions
- one for input lines, typed for the |input()| function.
These are completely separate.  Each history can only be accessed when
entering the same type of line.
Use the 'history' option to set the number of lines that are remembered
(default: 20).
Notes:
- When you enter a command-line that is exactly the same as an older one, the
  old one is removed (to avoid repeated commands moving older commands out of
  the history).
- Only commands that are typed are remembered.  Ones that completely come from
  mappings are not put in the history
- All searches are put in the search history, including the ones that come
  from commands like "*" and "#".  But for a mapping, only the last search is
  remembered (to avoid that long mappings trash the history).
{Vi: no history}

There is an automatic completion of names on the command-line; see
|cmdline-completion|.

							*c_CTRL-V*
CTRL-V		Insert next non-digit literally.  Up to three digits form the
		decimal value of a single byte.  The non-digit and the three
		digits are not considered for mapping.  This works the same
		way as in Insert mode (see above, |i_CTRL-V|).
		Note: Under Windows CTRL-V is often mapped to paste text.
		Use CTRL-Q instead then.
							*c_CTRL-Q*
CTRL-Q		Same as CTRL-V.

							*c_<Left>*
<Left>		cursor left
							*c_<Right>*
<Right>		cursor right
							*c_<S-Left>*
<S-Left> or <C-Left>					*c_<C-Left>*
		cursor one WORD left
							*c_<S-Right>*
<S-Right> or <C-Right>					*c_<C-Right>*
		cursor one WORD right
CTRL-B or <Home>					*c_CTRL-B* *c_<Home>*
		cursor to beginning of command-line
CTRL-E or <End>						*c_CTRL-E* *c_<End>*
		cursor to end of command-line

							*c_<LeftMouse>*
<LeftMouse>	cursor to position of mouse click.

CTRL-H							*c_<BS>* *c_CTRL-H*
<BS>		delete the character in front of the cursor (see |:fixdel| if
		your <BS> key does not do what you want).
							*c_<Del>*
<Del>		delete the character under the cursor (at end of line:
		character before the cursor) (see |:fixdel| if your <Del>
		key does not do what you want).
							*c_CTRL-W*
CTRL-W		delete the word before the cursor
							*c_CTRL-U*
CTRL-U		remove all characters between the cursor position and
		the beginning of the line.  Previous versions of vim
		deleted all characters on the line.  If that is the
		preferred behavior, add the following to your .vimrc: >
			:cnoremap <C-U> <C-E><C-U>
<
		Note: if the command-line becomes empty with one of the
		delete commands, Command-line mode is quit.
							*c_<Insert>*
<Insert>	Toggle between insert and overstrike.  {not in Vi}

{char1} <BS> {char2}	or				*c_digraph*
CTRL-K {char1} {char2}					*c_CTRL-K*
		enter digraph (see |digraphs|).  When {char1} is a special
		key, the code for that key is inserted in <> form.  {not in Vi}

CTRL-R {0-9a-z"%#:-=.}					*c_CTRL-R* *c_<C-R>*
		Insert the contents of a numbered or named register.  Between
		typing CTRL-R and the second character '"' will be displayed
		to indicate that you are expected to enter the name of a
		register.
		The text is inserted as if you typed it, but mappings and
		abbreviations are not used.  Characters that end the command
		line are inserted literally (<Esc>, <CR>, <NL>, <C-C>).  A
		<BS> or CTRL-W could still end the command line though, and
		remaining characters will then be interpreted in another mode,
		which might not be what you intended.
		Special registers:
			'"'	the unnamed register, containing the text of
				the last delete or yank
			'%'	the current file name
			'#'	the alternate file name
			'*'	the clipboard contents
			'/'	the last search pattern
			':'	the last command-line
			'-'	the last small (less than a line) delete
			'.'	the last inserted text
			'='	the expression register: you are prompted to
				enter an expression (see |expression|)
		See |registers| about registers.  {not in Vi}
CTRL-R CTRL-F
CTRL-R CTRL-P
CTRL-R CTRL-W
CTRL-R CTRL-A
		Insert the object under the cursor:
			CTRL-F	the Filename under the cursor
			CTRL-P	the Filename under the cursor, expanded with
				'path' as in |gf|
			CTRL-W	the Word under the cursor
			CTRL-A	the WORD under the cursor; see |WORD|
		{not in Vi}
		CTRL-F and CTRL-P: {only when +file_in_path feature is
		included}

					*c_CTRL-R_CTRL-R* *c_<C-R>_<C-R>*
CTRL-R CTRL-R {0-9a-z"%#:-=. CTRL-F CTRL-P CTRL-W CTRL-A}
		Insert register or object under the cursor.  Works like
		|c_CTRL-R| but inserts the text literally.  For example, if
		register a contains "xy^Hz" (where ^H is a backspace),
		"CTRL-R a" will insert "xz" while "CTRL-R CTRL-R a" will
		insert "xy^Hz".

CTRL-J						*c_CTRL-J* *c_<NL>* *c_<CR>*
<CR> or <NL>	start entered command
							*c_<Esc>*
<Esc>		When typed and 'x' not present in 'cpoptions', quit
		Command-line mode without executing.  In macros or when 'x'
		present in 'cpoptions', start entered command.
							*c_CTRL-C*
CTRL-C		quit command-line without executing

							*c_<Up>*
<Up>		recall older command-line from history, whose beginning
		matches the current command-line (see below).
							*c_<Down>*
<Down>		recall more recent command-line from history, whose beginning
		matches the current command-line (see below).

							*c_<S-Up>* *c_<PageUp>*
<S-Up> or <PageUp>
		recall older command-line from history
						*c_<S-Down>* *c_<PageDown>*
<S-Down> or <PageDown>
		recall more recent command-line from history

CTRL-D		command-line completion (see |cmdline-completion|)
'wildchar' option
		command-line completion (see |cmdline-completion|)
CTRL-N		command-line completion (see |cmdline-completion|)
CTRL-P		command-line completion (see |cmdline-completion|)
CTRL-A		command-line completion (see |cmdline-completion|)
CTRL-L		command-line completion (see |cmdline-completion|)

							*c_CTRL-_*
CTRL-_		a - switch between Hebrew and English keyboard mode, which is
		private to the command-line and not related to hkmap.
		This is useful when Hebrew text entry is required in the
		command-line, searches, abbreviations, etc.  Applies only if
		Vim is compiled with the |+rightleft| feature and the
		'allowrevins' option is set.
		See |rightleft.txt|.

		b - switch between Farsi and English keyboard mode, which is
		private to the command-line and not related to fkmap.  In
		Farsi keyboard mode the characters are inserted in reverse
		insert manner.  This is useful when Farsi text entry is
		required in the command-line, searches, abbreviations, etc.
		Applies only if Vim is compiled with the |+farsi| feature.
		See |farsi.txt|.

The <Up> and <Down> keys take the current command-line as a search string.
The beginning of the next/previous command-lines are compared with this
string.  The first line that matches is the new command-line.  When typing
these two keys repeatedly, the same string is used again.  For example, this
can be used to find the previous substitute command: Type ":s" and then <Up>.
The same could be done by typing <S-Up> a number of times until the desired
command-line is shown.  (Note: the shifted arrow keys do not work on all
terminals)

							*his* *:history*
:his[tory]	Print the history of last entered commands.  {not in Vi}

:his[tory] [{name}] [{first}][, [{last}]]
		List the contents of history {name} which can be:
		c[md]	 or :	command-line history
		s[earch] or /	search string history
		e[xpr]	 or =	expression register history
		i[nput]	 or @	input line history
		a[ll]		all of the above
		{not in Vi}

		If the numbers {first} and/or {last} are given, the respective
		range of entries from a history is listed.  These numbers can
		be specified in the following form:
							*:history-indexing*
		A positive number represents the absolute index of an entry
		as it is given in the first column of a :history listing.
		This number remains fixed even if other entries are deleted.

		A negative number means the relative position of an entry,
		counted from the newest entry (which has index -1) backwards.

		Examples:
		List entries 6 to 12 from the search history: >
			:history / 6,12
<
		List the recent five entries from all histories: >
			:history all -5,

==============================================================================
2. Command-line completion				*cmdline-completion*

When editing the command-line, a few commands can be used to complete the
word before the cursor.  This is available for:

- Command names: At the start of the command-line.
- Tags: Only after the ":tag" command.
- File names: Only after a command that accepts a file name or a setting for
  an option that can be set to a file name.  This is called file name
  completion.
- Options: Only after the ":set" command.
- Mappings: Only after a ":map" or similar command.
- Variable and function names: Only after a ":if", ":call" or similar command.

When Vim was compiled with the |+cmdline_compl| feature disabled, only file
names, directories and help items can be completed.

These are the commands that can be used:

							*c_CTRL-D*
CTRL-D		List names that match the pattern in front of the cursor.
		When showing file names, directories are highlighted (see
		'highlight' option).  Names where 'suffixes' matches are moved
		to the end.
					*c_CTRL-I* *c_wildchar* *c_<Tab>*
'wildchar' option
		A match is done on the pattern in front of the cursor.  The
		match (if there are several, the first match) is inserted
		in place of the pattern.  (Note: does not work inside a
		macro, because <Tab> or <Esc> are mostly used as 'wildchar',
		and these have a special meaning in some macros.) When typed
		again and there were multiple matches, the next
		match is inserted.  After the last match, the first is used
		again (wrap around).
		The behavior can be changed with the 'wildmode' option.
							*c_CTRL-N*
CTRL-N		After using 'wildchar' which got multiple matches, go to next
		match.  Otherwise recall more recent command-line from history.
<S-Tab>							*c_CTRL-P* *c_<S-Tab>*
CTRL-P		After using 'wildchar' which got multiple matches, go to
		previous match.  Otherwise recall older command-line from
		history.  <S-Tab> only works with the GUI, on the Amiga and
		with MS-DOS.
							*c_CTRL-A*
CTRL-A		All names that match the pattern in front of the cursor are
		inserted.
							*c_CTRL-L*
CTRL-L		A match is done on the pattern in front of the cursor.  If
		there is one match, it is inserted in place of the pattern.
		If there are multiple matches the longest common part is
		inserted in place of the pattern.  If the result is shorter
		than the pattern, no completion is done.

The 'wildchar' option defaults to <Tab> (CTRL-E when in Vi compatible mode; in
a previous version <Esc> was used).  In the pattern standard wildcards '*' and
'?' are accepted.  '*' matches any string, '?' matches exactly one character.

If you like tcsh's autolist completion, you can use this mapping:
	:cnoremap X <C-L><C-D>
(Where X is the command key to use, <C-L> is CTRL-L and <C-D> is CTRL-D)
This will find the longest match and then list all matching files.

If you like tcsh's autolist completion, you can use the 'wildmode' option to
emulate it.  For example, this mimics autolist=ambiguous:
        :set wildmode=longest,list
This will find the longest match with the first 'wildchar', then list all
matching files with the next.

							*suffixes*
For file name completion you can use the 'suffixes' option to set a priority
between files with almost the same name.  If there are multiple matches,
those files with an extension that is in the 'suffixes' option are ignored.
The default is ".bak,~,.o,.h,.info,.swp", which means that files ending in
".bak", "~", ".o", ".h", ".info" and ".swp" are sometimes ignored.  It is
impossible to ignore suffixes with two dots.  Examples:

  pattern:	files:				match:	~
   test*	test.c test.h test.o		test.c
   test*	test.h test.o			test.h and test.o
   test*	test.i test.h test.c		test.i and test.c

If there is more than one matching file (after ignoring the ones matching
the 'suffixes' option) the first file name is inserted.  You can see that
there is only one match when you type 'wildchar' twice and the completed
match stays the same.  You can get to the other matches by entering
'wildchar', CTRL-N or CTRL-P.  All files are included, also the ones with
extensions matching the 'suffixes' option.

To completely ignore files with some extension use 'wildignore'.

The old value of an option can be obtained by hitting 'wildchar' just after
the '='.  For example, typing 'wildchar' after ":set dir=" will insert the
current value of 'dir'.  This overrules file name completion for the options
that take a file name.

If you would like using <S-Tab> for CTRL-P in an xterm, put this command in
your .cshrc: >
	xmodmap -e "keysym Tab = Tab Find"
And this in your .vimrc: >
	:cmap <Esc>[1~ <C-P>

==============================================================================
3. Ex command-lines					*cmdline-lines*

The Ex commands have a few specialties:

							*:quote*
'"' at the start of a line causes the whole line to be ignored.  '"'
after a command causes the rest of the line to be ignored.  This can be used
to add comments.  Example: >
	:set ai		"set 'autoindent' option
It is not possible to add a comment to a shell command ":!cmd" or to the
":map" command and friends, because they see the '"' as part of their
argument.

							*:bar* *:\bar*
'|' can be used to separate commands, so you can give multiple commands in one
line.  If you want to use '|' in an argument, precede it with '\'.

These commands see the '|' as their argument, and can therefore not be
followed by another command:
    :autocmd
    :global
    :normal
    :perl
    :perldo
    :pyfile
    :python
    :read !
    :tcl
    :tcldo
    :tclfile
    :vglobal
    :write !
    :[range]!

Note that this is confusing (inherited from Vi): With ":g" the '|' is included
in the command, with ":s" it is not.

To be able to use another command anyway, use the ":execute" command.
Example (append the output of "ls" and jump to the first line): >
	:execute 'r !ls' | '[

There is one exception: When the 'b' flag is present in 'cpoptions', with the
":map" and ":abbr" commands and friends CTRL-V needs to be used instead of
'\'.  You can also use "<Bar>" instead.  See also |map_bar|.

Examples: >
	:!ls | wc		view the output of two commands
	:r !ls | wc		insert the same output in the text
	:%g/foo/p|>		moves all matching lines one shiftwidth
	:%s/foo/bar/|>		moves one line one shiftwidth
	:map q 10^V|		map "q" to "10|"
	:map q 10\| map \ l	map "q" to "10\" and map "\" to "l"
					(when 'b' is present in 'cpoptions')

You can also use <NL> to separate commands in the same way as with '|'.  To
insert a <NL> use CTRL-V CTRL-J.  "^@" will be shown.  Using '|' is the
preferred method.  But for external commands a <NL> must be used, because a
'|' is included in the external command.  To avoid the special meaning of <NL>
it must be preceded with a backslash.  Example: >
	:r !date<NL>-join
This reads the current date into the file and joins it with the previous line.

Note that when the command before the '|' generates an error, the following
commands will not be executed.


Because of Vi compatibility the following strange commands are supported: >
	:|			print current line (like ":p")
	:3|			print line 3 (like ":3p")
	:3			goto line 3

A colon is allowed between the range and the command name.  It is ignored
(this is Vi compatible).  For example: >
	:1,$:s/pat/string

When the character '%' or '#' is used where a file name is expected, they are
expanded to the current and alternate file name (see the chapter "editing
files" |:_%| |:_#|).

Embedded spaces in file names are allowed on the Amiga if one file name is
expected as argument.  Trailing spaces will be ignored, unless escaped with a
backslash or CTRL-V.  Note that the ":next" command uses spaces to separate
file names.  Escape the spaces to include them in a file name.  Example: >
	:next foo\ bar goes\ to school\
starts editing the three files "foo bar", "goes to" and "school ".

When you want to use the special characters '"' or '|' in a command, or want
to use '%' or '#' in a file name, precede them with a backslash.  The
backslash is not required in a range and in the ":substitute" command.

							*:_!*
The '!' (bang) character after an Ex command makes the command behave in a
different way.  The '!' should be placed immediately after the command, without
any blanks in between.  If you insert blanks the '!' will be seen as an
argument for the command, which has a different meaning.  For example:
	:w! name	write the current buffer to file "name", overwriting
			any existing file
	:w !name	send the current buffer as standard input to command
			"name"

==============================================================================
4. Ex command-line ranges			*cmdline-ranges* *[range]*

Some Ex commands accept a line range in front of them.  This is noted as
[range].  It consists of one or more line specifiers, separated with ',' or
';'.

						*:,* *:;*
When separated with ';' the cursor position will be set to that line
before interpreting the next line specifier.  This doesn't happen for ','.
Examples: >
   4,/this line/
<   	from line 4 till match with "this line" after the cursor line. >
   5;/that line/
<	from line 5 till match with "that line" after line 5.

The default line specifier for most commands is the cursor position, but the
commands ":write" and ":global" have the whole file (1,$) as default.

If more line specifiers are given than required for the command, the first
one(s) will be ignored.

Line numbers may be specified with:			*:range*
	{number}	an absolute line number
	.		the current line			  *:.*
	$		the last line in the file		  *:$*
	%		equal to 1,$ (the entire file)		  *:%*
	't		position of mark t (lower case)		  *:'*
	/{pattern}[/]	the next line where {pattern} matches	  *:/*
	?{pattern}[?]	the previous line where {pattern} matches *:?*
	\/		the next line where the previously used search
			pattern matches
	\?		the previous line where the previously used search
			pattern matches
	\&		the next line where the previously used substitute
			pattern matches

Each may be followed (several times) by '+' or '-' and an optional number.
This number is added or subtracted from the preceding line number.  If the
number is omitted, 1 is used.

The "/" and "?" after {pattern} are required to separate the pattern from
anything that follows.

The "/" and "?" may be preceded with another address.  The search starts from
there.  The difference from using ';' is that the cursor isn't moved.
Examples: >
	/pat1//pat2/	Find line containing "pat2" after line containing
			"pat1", without moving the cursor.
	7;/pat2/	Find line containing "pat2", after line 7, leaving
			the cursor in line 7.

The {number} must be between 0 and the number of lines in the file.  When
using a 0 (zero) this is interpreted as a 1 by most commands.  Commands that
use it as a count do use it as a zero (|:tag|, |:pop|, etc).  Some commands
interpret the zero as "before the first line" (|:read|, search pattern, etc).

Examples: >
	.+3		three lines below the cursor
	/that/+1	the line below the next line containing "that"
	.,$		from current line until end of file
	0;/that		the first line containing "that", also matches in the
			first line.
	1;/that		the first line after line 1 containing "that"

Some commands allow for a count after the command.  This count is used as the
number of lines to be used, starting with the line given in the last line
specifier (the default is the cursor line).  The commands that accept a count
are the ones that use a range but do not have a file name argument (because
a file name can also be a number).

Examples: >
	:s/x/X/g 5	substitute 'x' by 'X' in the current line and four
			following lines
	:23d 4		delete lines 23, 24, 25 and 26

A range should have the lower line number first.  If this is not the case, Vim
will ask you if it should swap the line numbers.  This is not done within the
global command ":g".

							*N:*
When giving a count before entering ":", this is translated into:
		:.,.+(count - 1)
In words: The 'count' lines at and after the cursor.  Example: To delete
three lines: >
		3:d<CR>		is translated into: .,.+2d<CR>
<
							*v_:*
{Visual}:	Starts a command-line with the Visual selected lines as a
		range.  The code ":'<,'>" is used for this range, which makes
		it possible to select a similar line from the command-line
		history for repeating a command on different Visually selected
		lines.

==============================================================================
5. Ex special characters				*cmdline-special*

In Ex commands, at places where a file name can be used, the following
characters have a special meaning.  These can also be used in the expression
function expand() |expand()|.
	%	   is replaced with the current file name		*:_%*
	#	   is replaced with the alternate file name		*:_#*
	#n	   (where n is a number) is replaced with the file name of
		   buffer n.  "#0" is the same as "#"
Note that these give the file name as it was typed.  If an absolute path is
needed (when using the file name from a different directory), you need to add
":p".  See |filename-modifiers|.

To avoid the special meaning of '%' and '#' insert a backslash before it.
Detail: The special meaning is always escaped when there is a backslash before
it, no matter how many backslashes.
	you type:		result	~
	   #			alternate.file
	   \#			#
	   \\#			\#

			       *:<cword>* *:<cWORD>* *:<cfile>* *<cfile>*
			       *:<sfile>* *<sfile>* *:<afile>* *<afile>*
			       *:<abuf>* *<abuf>* *:<amatch>* *<amatch>*
Note: these are typed literally, they are not special keys!
	<cword>    is replaced with the word under the cursor (like |star|)
	<cWORD>    is replaced with the WORD under the cursor (see |WORD|)
	<cfile>    is replaced with the path name under the cursor
	<afile>    when executing autocommands, is replaced with the file name
		   for a file read or write
	<abuf>     when executing autocommands, is replaced with the currently
		   effective buffer number (for ":r file" it is the current
		   buffer, the file being read is not in a buffer).
	<amatch>   when executing autocommands, is replaced with the match for
		   which this autocommand was executed.  It differs form
		   <afile> only when the file name isn't used to match with
		   (for FileType and Syntax events).
	<sfile>    when executing a ":source" command, is replaced with the
		   file name of the sourced file;
		   when executing a function, is replaced with
		   "function {function-name}"; function call nesting is
		   indicated like this:
		   "function {function-name1}->{function-name2}".  Note that
		   filename-modifiers are useless when <sfile> is used inside
		   a function.

							 *filename-modifiers*
		 *:_%:* *::p* *::.* *::~* *::h* *::t* *::r* *::e* *::s* *::gs*
The file name modifiers can be used after "%", "#", "#n", "<cfile>", "<sfile>",
"<afile>" or "<abuf>".  They are also used with the |fnamemodify()| function.
These are not available when Vim has been compiled without the |+modify_fname|
feature.
These modifiers can be given, in this order:
	:p	Make file name a full path.  Must be the first modifier.
	:~	Reduce file name to be relative to the home directory, if
		possible.  File name is unmodified if it is not below the home
		directory.
	:.	Reduce file name to be relative to current directory, if
		possible.  File name is unmodified if it is not below the
		current directory.
		For maximum shortness, use ":~:.".
	:h	Head of the file name (the last component and any separators
		removed).  Cannot be used with :e, :r or :t.
		Can be repeated to remove several components at the end.
		When the file name is an absolute path (starts with "/" for
		Unix; "x:\" for MS-DOS, WIN32, OS/2; "drive:" for Amiga), that
		part is not removed.  When there is no head (path is relative
		to current directory) the result is empty.
	:t	Tail of the file name (last component of the name).  Must
		precede any :r or :e.
	:r	Root of the file name (the last extension removed).  When
		there is only an extension (file name that starts with '.',
		e.g., ".vimrc"), it is not removed.  Can be repeated to remove
		several extensions (last one first).
	:e	Extension of the file name.  Only makes sense when used alone.
		When there is no extension the result is empty.
		When there is only an extension (file name that starts with
		'.'), the result is empty.  Can be repeated to include more
		extensions.  If there are not enough extensions (but at least
		one) as much as possible are included.
	:s?pat?sub?
		Substitute the first occurrence of "pat" with "sub".  This
		works like the |:s| command.  "pat" is a regular expression.
		Any character can be used for '?', but it must not occur in
		"pat" or "sub".
		After this, the previous modifiers can be used again.  For
		example ":p", to make a full path after the substitution.
	:gs?pat?sub?
		Substitute all occurrences of "path" with "sub".  Otherwise
		this works like ":s".

Examples, when the file name is "src/version.c", current dir
"/home/mool/vim": >
  :p			/home/mool/vim/src/version.c
  :p:.				       src/version.c
  :p:~				 ~/vim/src/version.c
  :h				       src
  :p:h			/home/mool/vim/src
  :p:h:h		/home/mool/vim
  :t					   version.c
  :p:t					   version.c
  :r				       src/version
  :p:r			/home/mool/vim/src/version
  :t:r					   version
  :e						   c
  :s?version?main?		       src/main.c
  :s?version?main?:p	/home/mool/vim/src/main.c
  :p:gs?/?\\?		\home\mool\vim\src\version.c

Examples, when the file name is "src/version.c.gz": >
  :p			/home/mool/vim/src/version.c.gz
  :e						     gz
  :e:e						   c.gz
  :e:e:e					   c.gz
  :e:e:r					   c
  :r				       src/version.c
  :r:e						   c
  :r:r				       src/version
  :r:r:r			       src/version
<
					*extension-removal* *:_%<*
If a "<" is appended to "%", "#", "#n" or "CTRL-V p" the extension of the file
name is removed (everything after and including the last '.' in the file
name).  This is included for backwards compatibility with version 3.0, the
":r" form is preferred.  Examples: >

	%		current file name
	%<		current file name without extension
	#		alternate file name for current window
	#<		idem, without extension
	#31		alternate file number 31
	#31<		idem, without extension
	<cword>		word under the cursor
	<cWORD>		WORD under the cursor (see |WORD|)
	<cfile>		path name under the cursor
	<cfile><	idem, without extension

Note: Where a file name is expected wildcards expansion is done.  On Unix the
shell is used for this.  Backticks also work, like in
	:n `echo *.c`
But expansion is only done if there are any wildcards before expanding the
'%', '#', etc..  This avoids expanding wildcards inside a file name.  If you
want to expand the result of <cfile>, add a wildcard character to it.
Examples: (alternate file name is "?readme?")
	command		expands to  ~
	:e #		:e ?readme?
	:e `ls #`	:e {files matching "?readme?"}
	:e #.*		:e {files matching "?readme?.*"}
	:cd <cfile>	:cd {file name under cursor}
	:cd <cfile>*	:cd {file name under cursor plus "*" and then expanded}

							*filename-backslash*
For filesystems that use a backslash as directory separator (MS-DOS, Windows,
OS/2), it's a bit difficult to recognize a backslash that is used to escape
the special meaning of the next character.  The general rule is: If the
backslash is followed by a normal file name character, it does not have a
special meaning.  Therefore "\file\foo" is a valid file name, you don't have
to type the backslash twice.

And exception is the '$' sign.  It is a valid character in a file name.  But
to avoid a file name like "$home" to be interpreted as an environment variable,
it needs to be preceded by a backslash.  Therefore you need to use "/\$home"
for the file "$home" in the root directory.  A few examples:

	FILE NAME	INTERPRETED AS	~
	$home		expanded to value of environment var $home
	\$home		file "$home" in current directory
	/\$home		file "$home" in root directory
	\\$home		file "\\", followed by expanded $home

 vim:tw=78:
