Hari Krishna Dara wrote:
On Fri, 6 Oct 2006 at 8:19am, Jürgen Krämer wrote:
Hi,
Hari Krishna Dara wrote:
The help on complete() gives an example as a usage pattern which seems
to be very useful, but it doesn't work. Here is a slightly modified
example to avoid breaking the lines in email transmission:
inoremap <expr> <F5> ListWeeks()
func! ListWeeks()
call complete(col('.'), ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri',
'Sat'])
return ''
endfunc
If you hit <F5>, Vim complains about the complete() as not allowed.
Error detected while processing function ListWeeks:
line 1:
E523: Not allowed here
I don't know the reason for this restriction, but it is documented under
":help complete()":
I am sorry, what exactly are you referring to as documented? The help on
complete() talks nothing about E523 or why it can't be used in <expr>
maps. In fact the above example is directly based on the example given
in that help.
He means this, from
*eval.txt* For Vim version 7.0. Last change: 2006 Sep 22
lines 2019-2023
---- 8< ----
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 = |i_CTRL-R|. It does not work after CTRL-O or
with an expression mapping.
---- >8 ----
IIUC, "expression mapping" refers to ":imap <expr>".
":help E523" refers to the 'secure' option.
The difference between your mapping and the example is that you use ":imap
<expr>" while the example does not use <expr> but uses <C-R>=
I don't know the reason for the restriction but it _is_ documented.
Best regards,
Tony.
