<div dir="ltr">On Sat, Jun 8, 2013 at 8:16 PM, Peter Hall <span dir="ltr"><<a href="mailto:peter.hall@memorphic.com" target="_blank">peter.hall@memorphic.com</a>></span> wrote:<div class="gmail_extra"><div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">
<div class="im"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">
<div>Most recent spec was Haskell 2010, as pointed out by someone else. There is some talk of pushing for a 2014 revision which would include (among other things) removal of the monomorphism restriction — but the standards committee is notoriously conservative, and IIRC argued against that proposal in 2010.</div>
</div></div></div></blockquote><div> </div></div><div>But there has a been a lot of momentum in recent years towards removing it. Aren't we a little optimistic? Presumably the only objection is the feeling that it raises the barrier of difficulty for new implementations?</div>
</div></div></div></blockquote></div><div class="gmail_extra"><br></div>No. The original reason for it is that one typically gives a constant applicative form (a binding without a function arrow; informally, a "value") a name so that it can be shared — but a polymorphic value cannot be shared. (See, for example, the various tricks for memoizing the Fibonacci series; these rely on the list being shared, both in its own definition and when it is used.)<br clear="all">
<div><br></div>-- <br><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>
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