Re: Tabs for indentation, spaces for alignment - possible in vanilla vim?

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To not break plugin that uses Tab you either need to avoid mapping Tab or somehow run Tab "manually" in new mapping. I know how to chain mappings (run one mapping from the other), but it is rather complicated code that does not handle at least one edge case.

This mapping is not going to achieve tabs indentation+space alignment goal: this goal means that some "starter" lines have only indentation via tabs and "continuation" lines have indentation (same as "starter") and alignment:

if (ch1 == 'a'
&& ch2 == 'b'
&& ch3 == 'c')
^^^^ indentation
^^^^ alignment (lines up first "&" and next character after the opening parenthesis)

. It also means that inline alignment should be done with spaces, but this bit is pretty trivial.

To achieve this you should not only map Tab. You should also make Vim behave correctly when you add new line in a number of ways. OP simplifies it too much: the two "simple" statements are nearly not a complete description of this concept. Wiki article talks about this: see section "Continuation lines".

On June 29, 2014 9:59:40 AM GMT+03:00, Paul Isambert <zappathustra@free.fr> wrote:
>Le samedi 28 juin 2014 à 11:33, Bruno Sutic a écrit:
>> Hi,
>> I would like to use tabs for indentation and spaces for alignment.
>> This "idea" is also described here:
>http://vim.wikia.com/wiki/Indent_with_tabs%2C_align_with_spaces#Smart_tabs
>>
>> To put it simple:
>> - tabs should be used at the beginning of the line
>> - spaces should be inserted when after any character in the line
>>
>> The article linked above proposes a 'smart tab' plugin to achieve
>this. Unfortunately, this plugin breaks snipmate plugin which also uses
>tab.
>>
>> So I wonder, is there a way (an option maybe) to achieve this without
>a plugin?
>> I tried `:h 'smarttab'`, but that does something else.
>
>Try this:
>
> function! s:TabOrSpace ()
> let c = col(".")
> if c == 1 || getline(".")[c-2] =~ '\t'
> return "\t"
> else
> return " "
> endif
> endfunction
> inoremap <expr> <Tab> <SID>TabOrSpace()
>
>Then <Tab> (you can change the key, of course) will insert a tab if at
>the beginning of the line or after a tab, and a space (you can make it
>return more) otherwise.
>
>I'm not 100% sure that's what you want, but I hope it helps anyway.
>
>Best,
>Paul
>
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