*col()*
		The result is a Number, which is the byte index of the column
		position given with {expr}.
		For accepted positions see |getpos()|.
		When {expr} is "$", it means the end of the cursor line, so
		the result is the number of bytes in the cursor line plus one.
		Additionally {expr} can be [lnum, col]: a |List| with the line
		and column number. Most useful when the column is "$", to get
		the last column of a specific line.  When "lnum" or "col" is
		out of range then col() returns zero.

		With the optional {winid} argument the values are obtained for
		that window instead of the current window.

		To get the line number use |line()|.  To get both use
		|getpos()|.

		For the screen column position use |virtcol()|.  For the
		character position use |charcol()|.

		Note that only marks in the current file can be used.

		Examples: >vim
			echo col(".")			" column of cursor
			echo col("$")			" length of cursor line plus one
			echo col("'t")			" column of mark t
			echo col("'" .. markname)	" column of mark markname
<
		The first column is 1.  Returns 0 if {expr} is invalid or when
		the window with ID {winid} is not found.
		For an uppercase mark the column may actually be in another
		buffer.
		For the cursor position, when 'virtualedit' is active, the
		column is one higher if the cursor is after the end of the
		line.  Also, when using a <Cmd> mapping the cursor isn't
		moved, this can be used to obtain the column in Insert mode: >vim
			imap <F2> <Cmd>echo col(".").."\n"<CR>
<

                Parameters: ~
                  • {expr} (`string|any[]`)
                  • {winid} (`integer?`)

                Return: ~
                  (`integer`)

complete({startcol}, {matches})                                *complete()* *E785*
		Set the matches for Insert mode completion.
		Can only be used in Insert mode.  You need to use a mapping
		with CTRL-R = (see |i_CTRL-R|).  It does not work after CTRL-O
		or with an expression mapping.
		{startcol} is the byte offset in the line where the completed
		text start.  The text up to the cursor is the original text
		that will be replaced by the matches.  Use col('.') for an
		empty string.  "col('.') - 1" will replace one character by a
		match.
		{matches} must be a |List|.  Each |List| item is one match.
		See |complete-items| for the kind of items that are possible.
		"longest" in 'completeopt' is ignored.
		Note that the after calling this function you need to avoid
		inserting anything that would cause completion to stop.
		The match can be selected with CTRL-N and CTRL-P as usual with
		Insert mode completion.  The popup menu will appear if
		specified, see |ins-completion-menu|.
		Example: >vim
			inoremap <F5> <C-R>=ListMonths()<CR>

			func ListMonths()
			  call complete(col('.'), ['January', 'February', 'March',
			    \ 'April', 'May', 'June', 'July', 'August', 'September',
			    \ 'October', 'November', 'December'])
			  return ''
			endfunc
<		This isn't very useful, but it shows how it works.  Note that
		an empty string is returned to avoid a zero being inserted.

                Parameters: ~
                  • {startcol} (`integer`)
                  • {matches} (`any[]`)

complete_add({expr})                                            *complete_add()*
		Add {expr} to the list of matches.  Only to be used by the
		function specified with the 'completefunc' option.
		Returns 0 for failure (empty string or out of memory),
		1 when the match was added, 2 when the match was already in
		the list.
		See |complete-functions| for an explanation of {expr}.  It is
		the same as one item in the list that 'omnifunc' would return.

                Parameters: ~
                  • {expr} (`any`)

                Return: ~
                  (`0|1|2`)

complete_check()                                              *complete_check()*
		Check for a key typed while looking for completion matches.
		This is to be used when looking for matches