<div dir="ltr">You could also define a ** exponentiation operator, i.e. "kilogram * meter / second**2".<div class="gmail_extra">
<br><div class="gmail_quote">On Tue, Nov 29, 2016 at 4:15 PM, Rick Mann via swift-users <span dir="ltr"><<a href="mailto:swift-users@swift.org" target="_blank">swift-users@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
> On Nov 29, 2016, at 15:22 , Howard Lovatt <<a href="mailto:howard.lovatt@gmail.com">howard.lovatt@gmail.com</a>> wrote:<br>
><br>
> Why not define some other symbol so that you can get the precedence you want?<br>
<br>
</span>I could, but I think I'll just leave things as they are. No need to add confusion; it works to use parentheses.<br>
<span class="im HOEnZb"><br>
><br>
> -- Howard.<br>
><br>
> On 30 November 2016 at 09:28, Greg Parker via swift-users <<a href="mailto:swift-users@swift.org">swift-users@swift.org</a>> wrote:<br>
><br>
> > On Nov 29, 2016, at 2:55 AM, Rick Mann via swift-users <<a href="mailto:swift-users@swift.org">swift-users@swift.org</a>> wrote:<br>
> ><br>
> > Working on dimensional analysis, I have some proof-of-concept code that seems to be working:<br>
> ><br>
> > let n1 = kilogram * meter / second * second<br>
> > ([(kg⋅m) / s]⋅s)<br>
> ><br>
> > let n2 = kilogram * meter / (second * second)<br>
> > [(kg⋅m) / (s⋅s)]<br>
> ><br>
> > Note: () around unit products, [] around unit quotients.<br>
> ><br>
> > I'd like to adjust the precedence of operator * for my Unit protocol to be higher than /. Is that possible? It wasn't at all clear to me how to do that in Swift 3, or if can even be done at all.<br>
><br>
> You can't. A Swift operator's precedence is the same for all types that implement that operator. Operators * and / cannot use the same precedence on Int but different precedence on Unit.<br>
><br>
> You could try to change the precedence of * and / globally - they're defined like any other operator in stdlib/public/core/Policy.<wbr>swift - but you'll break lots of other code that way.<br>
><br>
><br>
> --<br>
> Greg Parker <a href="mailto:gparker@apple.com">gparker@apple.com</a> Runtime Wrangler<br>
><br>
><br>
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<br>
<br>
</span><span class="HOEnZb"><font color="#888888">--<br>
Rick Mann<br>
<a href="mailto:rmann@latencyzero.com">rmann@latencyzero.com</a><br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
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