(#) is also used by the diagrams library, mainly for using functions as if they were &quot;attributes&quot;.<br><br>In the context of lens, this is discussed a bit here: <a href="https://github.com/ekmett/lens/issues/17">https://github.com/ekmett/lens/issues/17</a><br>

<div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Nov 20, 2012 at 9:31 AM, Stephen Tetley <span dir="ltr">&lt;<a href="mailto:stephen.tetley@gmail.com" target="_blank">stephen.tetley@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">&quot;Haskell&quot; called this operator (#) about 12 years ago - see Peter<br>
Thiemann&#39;s WASH and Eric Meijer and colleagues MS Agent scripting.<br>
<br>
I&#39;d much prefer (#) if it didn&#39;t interfere with GHC&#39;s magic hash, I<br>
suspect the above authors were using Hugs...<br>
<div class="im HOEnZb"><br>
On 20 November 2012 17:19, Dan Burton &lt;<a href="mailto:danburton.email@gmail.com">danburton.email@gmail.com</a>&gt; wrote:<br>
&gt; Just to bring up some prior art, from what I&#39;ve heard, F# calls this |&gt;.<br>
<br>
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