Two minor fixes: 1. Put integral_constant conversion to integral in even without constexpr support. 2. Add ios_base to <iosfwd>. The latter is being tracked by LWG 2026.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@123080 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/iosfwd b/include/iosfwd
index 1f9fe3b..0e5c683 100644
--- a/include/iosfwd
+++ b/include/iosfwd
@@ -92,6 +92,8 @@
_LIBCPP_BEGIN_NAMESPACE_STD
+class ios_base;
+
template<class _CharT> struct _LIBCPP_VISIBLE char_traits;
template<class _Tp> class _LIBCPP_VISIBLE allocator;