<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><blockquote type="cite" class=""><div class="">On Jul 23, 2017, at 5:49 PM, David Sweeris 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=""><meta http-equiv="content-type" content="text/html; charset=utf-8" class=""><div dir="auto" class=""><div class=""><br class=""></div><div class="">On Jul 23, 2017, at 12:18, Taylor Swift <<a href="mailto:kelvin13ma@gmail.com" class="">kelvin13ma@gmail.com</a>> wrote:<br class=""><br class=""></div><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">I don’t think tuples are a suitable replacement for FSAs. A tuple should be able to be broken up and optimized by the compiler, and have no contiguity guarantees in memory.</div></div></div></div></blockquote></div><div dir="auto" class=""><br class=""></div><div dir="auto" class="">C's static arrays are imported as tuples, which need at least some level of contiguity guarantees to work. Even if tuples in general make that such a guarantee, tuple-based FSAs could use the same compiler logic as imported C arrays.</div></div></div></blockquote><br class=""></div><div>I think that’s supposed to be a workaround solution, not a map going forward. By having to support C-array conversion, tuples have to give up tuple-specific optimizations, like rearranging members and contiguity. Adding FSAs (with a distinct internal representation) will let the two have different optimizations.</div><div><br class=""></div><div class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">— </div><div class="">Daryle Walker<br class="">Mac, Internet, and Video Game Junkie<br class="">darylew AT mac DOT com </div></div></div><br class=""><div><blockquote type="cite" class=""></blockquote></div></div></body></html>