> On 09/29/2011 01:58 AM, Benjamin R. Haskell wrote:
>> On Wed, 28 Sep 2011, AK wrote:
>>> Hi, I'm trying to write a small function that is called when I press
>>> tab key and checks if current line is empty; if it is, it should
>>> insert a tab, and if not, it should call two other functions. Here's
>>> the example of what I came up with, which does not work right:
>>
>> Wanting to either insert something or run another function is a good
>> case for <expr> mappings. It depends a bit on how TriggerSnippet works,
>> the following might be all you need:
>>
>> fun! DoTab()
>> if getline('.') =~ '^\s*$'
>> return "\<tab>"
>> else
>> call CloseMenu()
>> return TriggerSnippet()
>> endif
>> endfun
>> ino <expr> <tab> DoTab()
>
> I get 'E523: not allowed here' in TriggerSnippet. I tried :set secure ,
> but that did not help.
I think what happens is, that one of your functions triggers an
action, that is not allowed inside an expr-mapping. If you need to do
something like this, you need to have the functions return the
commands, that will do that.
See :h :map-<expr>
and look at the third paragraph.
regards,
Christian
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