Marshall Clow: LWG Issue 2056: future_errc enums start with value 0 (invalid value for broken_promise).
llvm-svn: 190756
diff --git a/libcxx/src/future.cpp b/libcxx/src/future.cpp
index 7d9a5b5..70919ab 100644
--- a/libcxx/src/future.cpp
+++ b/libcxx/src/future.cpp
@@ -26,11 +26,15 @@
return "future";
}
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wswitch"
+
string
__future_error_category::message(int ev) const
{
switch (static_cast<future_errc>(ev))
{
+ case future_errc(0): // For backwards compatibility with C++11 (LWG 2056)
case future_errc::broken_promise:
return string("The associated promise has been destructed prior "
"to the associated state becoming ready.");
@@ -46,6 +50,8 @@
return string("unspecified future_errc value\n");
}
+#pragma clang diagnostic pop
+
const error_category&
future_category() _NOEXCEPT
{
