Re: Filter-like command -- but to insert instead of replacing

On Thu, Feb 9, 2017 at 5:49 PM, Sylvain Leroux <sylvain@chicoree.fr> wrote:
> Thank you for your reply Bram,
> And more generally thank you for your great work & continuous
> involvement with Vim.
>
>
> Some comments inline:
>
> On 02/09/2017 04:06 PM, Bram Moolenaar wrote:
>> I don't think it can be done with one command. Simplest seems to be to
>> copy the text and then filter it.
>> (visually select the text)
>> YP
>> gv
>> :!filter-command
>
> I was out of idea when I posted yesterday, but there is indeed a simple
> workaround at least on some Unix-like systems:
>
> :{range}! tee >(wc -l)
>
> But I agree a more generic/cross-platform solution would be better.
>
>> Would not be a bad idea to have an Ex command for this. Not sure what
>> to call it, :feed perhaps? :writeread ?
>>
>
> For a really generic solution, the command should support a source range
> and a destination range-or-address. At some point while experimenting I
> thought there could be an option to the `!r` command.
>
> Here is what I had in mind:
>
> :{range-1}r[read]>[range-2] !{filter}
>
> But, as you suggested, we may envision some new `feed` command instead:
>
> :{range-1}fee[d][range-2] !{filter}
>
> {range-1} is the destination range as specified for the `read` command.
> [range-2] is the source range whose content is written on {filter} input
> stream. [range-2] is optional and is equal to {range-1} if not specified.
>
>
> What do you think of that?

I would really prefer some variation or enhancement to :! or :read
rather than *yet another* narrow, special-purpose command (:feed,
:writeread) with no discoverability or intuitive nature.

Usability takes thought and deliberation. Every time someone asks for
a random feature the solution should not be "let's add a new
:dothisonething command". And yes, the usable/intuitive approach might
take more work.

---
Justin M. Keyes

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