Re: "have tabs after the first non-blank inserted as spaces"

On Thu, 9 Sep 2010, Christian Brabandt wrote:

> On Thu, September 9, 2010 11:36 am, livim wrote:
>> I can't understand " It might be nice to have tabs after the first non-
>> blank inserted as spaces if you do this though. "
>> Who can give me some illustration?
>
> imap <expr> <tab> getline('.')[0:col('.')-1]=~'^\s*$'?'<tab>' : repeat(' ', &ts)
>

Cool. You lose the 'tabbyness', though. This modification adds a tab
(if no nonwhitespace so far) or enough spaces to put the cursor at the
next tabstop:

imap <expr> <tab> getline('.')[0:col('.')-1] !~ '\S' ? '<tab>'
\ : repeat(' ', &ts-((col('.')-1) % &ts))

To the OP, for an example of why the concept is useful, see the file
below, which is indented with tabs.

» indicates where <tab> was pressed to insert spaces when 'tabstop' was 6 (using the above mapping).

Set tabstop to different values:
:se ts=2
:se ts=9
to see that the vertically aligned '=' signs stay aligned.

===> simple-tab-example.c <===
int main(void) {
int i» = 10;
float f» = 20;
if (1) {
int asdf» = 1;
int j» = 1;
}
return 0;
}
/* vim:set listchars=tab\:│_ ts=6 sts=0: */

--
Best,
Ben

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