<div dir="auto">This does sound more useful! </div><div dir="auto">What are some simple expressivity examples for the two? </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 7, 2021 at 1:36 PM Zemyla <<a href="mailto:zemyla@gmail.com">zemyla@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">I kind of don't like it, because the continuation doesn't return anything but itself. I'd prefer something that works more like the setjmp function in C, taking a value and returning the value plus a function that lets it return the new value:<div dir="auto"><br></div><div dir="auto">setJump :: MonadCont m => a -> m (a -> m b, a)</div><div dir="auto">setJump a = callCC $ \k -> let</div><div dir="auto"> go b = k (go, b)</div><div dir="auto"> in pure (go, a)</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 7, 2021, 11:36 Carter Schonwald <<a href="mailto:carter.schonwald@gmail.com" target="_blank">carter.schonwald@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Yeah </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 7, 2021 at 12:16 PM Edward Kmett <<a href="mailto:ekmett@gmail.com" rel="noreferrer" target="_blank">ekmett@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I rather like label. +1 from me.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 7, 2021 at 1:25 AM Tom Ellis <<a href="mailto:tom-lists-haskell-cafe-2017@jaguarpaw.co.uk" rel="noreferrer" target="_blank">tom-lists-haskell-cafe-2017@jaguarpaw.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Sun, Mar 07, 2021 at 03:25:16AM +0000, Alexandre Esteves wrote:<br>
> replay :: MonadCont m => m (m a)<br>
> replay = callCC $ pure . fix<br>
> <br>
> Using this in a do-notation block allows one to bind a name to the<br>
> sub-block that starts immediately after.<br>
> I reached for continuations to try to get this behavior for use with<br>
> recursive flows without disrupting the reading of the main forward flow and<br>
> found how to do it in <a href="https://jsdw.me/posts/haskell-cont-monad/" rel="noreferrer noreferrer" target="_blank">https://jsdw.me/posts/haskell-cont-monad/</a> under the<br>
> name "goto".<br>
> <br>
> While "goto" is as familiar as a name can be, I feel "replay" more<br>
> accurately conveys, that you can only 'go back', by stating what actually<br>
> is happening - that a sub-block we're currently evaluating is replayed from<br>
> its beginning.<br>
<br>
Looks like a "label" more than a "goto" to me. Would "label" be a<br>
good name?<br>
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