<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">What would this actually gain, other than most floating-point code producing different results even for basic arithmetic when run on differing platforms? Having “Int” mean “native word size” is tolerable because:</div><div class=""><br class=""></div><div class="">(a) most integer code deals with small numbers for which the result is the same either way</div><div class="">(b) if the result were different due to overflow, that would trap in Swift</div><div class=""><br class=""></div><div class="">Neither of these properties holds for floating-point. 1/3 will give one result on one platform, and another result on another platform. Floating-point has enough misunderstood sharp edges as is. We don’t need to add more.</div><div class=""><br class=""></div><div class="">– Steve</div><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 5, 2016, at 4:10 PM, Paul Cantrell via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">In principle, having Float, Float32, and Float64 and no “Double” at all seems highly sensible to me.</div><div class=""><br class=""></div><div class="">In practice, the migration cost of changing the meaning of Float from “32-bit” to “platform preferred size” seems like a potential deal-killer.</div><div class=""><br class=""></div><div class="">P</div><br class=""><div class=""><blockquote type="cite" class=""><div class="">On Jan 5, 2016, at 2:25 PM, Alex Johnson via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="">Just to clarify: I was suggesting removing the name "Double" and giving a different meaning to the name "Float".</div><div class=""><br class=""></div><div class="">~ Alex</div><div class=""><br class=""></div><div class="gmail_quote">On Tue, Jan 5, 2016 at 11:51 AM, Chris Lattner <span dir="ltr" class=""><<a href="mailto:clattner@apple.com" target="_blank" class="">clattner@apple.com</a>></span> wrote:</div><div class="gmail_quote"><br class=""><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 style="word-wrap:break-word" class=""><div class="">These are functionally different cases. We are *omitting* a C feature by removing ++ and --. This proposal included keeping the name “Double” but giving it a different meaning.</div></div></blockquote></div>
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