<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">I'd like to propose a variant of a very minor, additive proposal Erica Sadun posted last year, that cleans up a slightly messy idiomatic use of conditional compilation in libraries. The effects should be quite limited; I'd call it a "standard library" addition except that the repertoire of compiler-control statements isn't strictly part of the stdlib.</div><div class=""><br class=""></div>Proposal is here: <a href="https://gist.github.com/graydon/809af2c726cb1a27af64435e47ef4e5d" class="">https://gist.github.com/graydon/809af2c726cb1a27af64435e47ef4e5d</a><div class=""><br class=""></div><div class="">Implementation (minus fixits) is here: <a href="https://github.com/graydon/swift/commit/16493703ea297a1992ccd0fc4d2bcac7d078c982" class="">https://github.com/graydon/swift/commit/16493703ea297a1992ccd0fc4d2bcac7d078c982</a></div><div class=""><br class=""></div><div class="">Feedback appreciated,</div><div class=""><br class=""></div><div class="">-Graydon</div><div class=""><br class=""></div></body></html>