<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Saying "people shouldn't be using this API in library code" seems
like a poor reason to potentially break (working?) packages
downstream. <br>
</p>
<div class="moz-cite-prefix">On 10/30/18 7:42 AM, Andrew Martin
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABNC7eNbrm_0HoD=5qvZqLFsdBS3HJUBqGKG_iBaAD8tBELaVQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">The benefit is certainly small, and it probably
would discourage using the API. I don't think that the migration
path would be tricky. The new package would just reexport
Text.Printf when built with base < 4.13, and it would define
it when built with base >= 4.13. All that is required is a
build-depends line. However, people really shouldn't be using
this API in library code. Other modules in base provide more
efficient and more type-safe ways handle most of the situations
I've seen this used for.
<div>
<div>I've never used System.Console.GetOpt (I'm typically use
optparse-applicative for option parsing), but yes, I think
that would also be a good candidate. Since there are
multiple competing approach for argument parsing in the
haskell ecosystem, my preference would be to avoid blessing
any of them with inclusion in base.</div>
</div>
<div><br>
</div>
<div>I don't feel particularly strongly about either of these,
but their position in base feels odd. They both feel like the
result of applying a "batteries included" mindset to a
standard library that has by and large refrained from
including batteries.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Tue, Oct 30, 2018 at 8:17 AM Herbert Valerio
Riedel <<a href="mailto:hvriedel@gmail.com"
moz-do-not-send="true">hvriedel@gmail.com</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
On 2018-10-30 at 08:04:59 -0400, Andrew Martin wrote:<br>
> Here's an idea for this I had last night. It's narrowly
scoped, but I think<br>
> it moves us a tiny bit in the right direction. We could
move Text.Printf<br>
> out of base and into its own library. This doesn't really
belong in base.<br>
> The interface it provides it somewhat opinionated, and
it's not even<br>
> type-safe. The new library could be named `printf` and
could live under the<br>
> haskell github organization. Any thoughts for or against?<br>
<br>
Ok, but what does this effectively achieve?<br>
<br>
Text.Printf is an API that has been extremely stable and
doesn't<br>
significant evolve anymore; I don't think it has contributed
to major<br>
ver bumps in recent times, nor is it likely to. So I don't see
much of a<br>
compelling benefit in doing so. The effect I'd expect if we do
this is<br>
that `Text.Printf` will be reached for less (which some might
argue to<br>
be a desirable effect -- but you're effectively pushing this
API to a<br>
path of slow legacy death due to reduced discoverability,
IMO), as the<br>
convenience of using it is reduced by requiring adding and
maintaining<br>
an additional `build-depends` line to your package
descriptions, as well<br>
as having to deal with the subtly tricky business of handling
the<br>
migration path pre/post-split (c.f. the `network-bsd` split
currently<br>
being in progress).<br>
<br>
Btw, a related extremely stable API in base I could think of
which<br>
people might argue doesn't belong into `base` either is maybe<br>
`System.Console.GetOpt`; would you argue to split that off as
well?<br>
_______________________________________________<br>
Libraries mailing list<br>
<a href="mailto:Libraries@haskell.org" target="_blank"
moz-do-not-send="true">Libraries@haskell.org</a><br>
<a
href="http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries</a><br>
</blockquote>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">-Andrew Thaddeus Martin</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
Libraries mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Libraries@haskell.org">Libraries@haskell.org</a>
<a class="moz-txt-link-freetext" href="http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries">http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries</a>
</pre>
</blockquote>
</body>
</html>