<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=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 20, 2019, at 14:02, Mikhail Maltsev <<a href="mailto:Mikhail.Maltsev@arm.com" class="">Mikhail.Maltsev@arm.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">On 3/20/19 5:24 PM, Marshall Clow via libcxx-dev wrote:<br class=""><blockquote type="cite" class=""><br class=""><br class="">On Tue, Mar 19, 2019 at 1:10 PM Louis Dionne via libcxx-dev<br class=""><<a href="mailto:libcxx-dev@lists.llvm.org" class="">libcxx-dev@lists.llvm.org</a> <<a href="mailto:libcxx-dev@lists.llvm.org" class="">mailto:libcxx-dev@lists.llvm.org</a>>> wrote:<br class=""><br class=""> Hi,<br class=""><br class=""> I'd like to know whether folks currently have breaking changes planned for<br class=""> the version 2 ABI of libc++. Are we aware of improvements that would require<br class=""> breaking the ABI and that we have not implemented yet?<br class=""><br class=""><br class="">I have a note to fix XXX::set_value to use call_once when I can break ABI, so I<br class="">should do that first.<br class=""></blockquote><br class="">You also mentioned some <regex>-related changes:<br class=""><a href="https://bugs.llvm.org/show_bug.cgi?id=35967#c2" class="">https://bugs.llvm.org/show_bug.cgi?id=35967#c2</a><br class=""></div></div></blockquote><br class=""></div><div>Right, those two items are exactly the kind of thing I was thinking about. Let's implement those and put them behind ABI macros just so we don't forget. When we are ready to stabilize the ABI we won't miss those changes.</div><div><br class=""></div><div>Louis</div><div><br class=""></div></body></html>