<div dir="ltr">And Opaleye (a successor to haskellDB, for safe interaction with SQL databases) also uses arrow notation last I checked. As I recall do-notation is too powerful, whereas proc-notation provides exactly the right expressive power (no illegal SQL queries can be expressed). But that's not to say Tom (author of Opaleye) couldn't be content with a profunctor-based desugaring rather than an Arrow-based one?</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature">--<br>Mathieu Boespflug<br>Founder at <a href="http://tweag.io" target="_blank">http://tweag.io</a>.</div></div>
<br><div class="gmail_quote">On 21 December 2016 at 16:31, Brandon Allbery <span dir="ltr"><<a href="mailto:allbery.b@gmail.com" target="_blank">allbery.b@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><span class=""><div class="gmail_quote">On Wed, Dec 21, 2016 at 12:15 AM, Edward Kmett <span dir="ltr"><<a href="mailto:ekmett@gmail.com" target="_blank">ekmett@gmail.com</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Given that little new code seems to be being written with Arrows in mind, while some older code makes heavy use of it (hxt, etc.), refactoring the arrow hierarchy is kind of a hard sell. It is by no means impossible, just something that would require a fair bit of community wrangling and a lot of work showing clear advantages to a new status quo at a time when its very hard to get anybody to care about arrow notation at all.</div></blockquote></div><br></span>The arrowized-FRP folks seem to care a fair bit.<span class="HOEnZb"><font color="#888888"><br><div><br></div>-- <br><div class="m_7380446894085911101gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>brandon s allbery kf8nh sine nomine associates</div><div><a href="mailto:allbery.b@gmail.com" target="_blank">allbery.b@gmail.com</a> <a href="mailto:ballbery@sinenomine.net" target="_blank">ballbery@sinenomine.net</a></div><div>unix, openafs, kerberos, infrastructure, xmonad <a href="http://sinenomine.net" target="_blank">http://sinenomine.net</a></div></div></div>
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