<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=""><br class=""><div><blockquote type="cite" class=""><div class="">On Sep 5, 2017, at 5:11 PM, Jordan Rose via swift-dev <<a href="mailto:swift-dev@swift.org" class="">swift-dev@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">Another idea would be to restrict @fixedContents to require that all stored properties appear contiguously in the struct, possibly even pinned to the top or bottom, to indicate that order's not completely arbitrary. Again, that's just an improvement, not full protection.</span></div></blockquote></div><br class=""><div class="">I’m a big fan of syntactically pinning the stored properties at the top whenever their layout is part of the ABI.</div><div class="">-Andy</div></body></html>