commit 5083aef0370d366ef86d669fa51b6ea82711ecbe
author Louis Dionne <ldionne.2@gmail.com> Wed Mar 23 17:02:07 2022 -0400
committer Copybara-Service <copybara-worker@google.com> Fri Mar 25 05:51:12 2022 -0700
tree e89c741d1e6c2fab0488743a675510de8f5ed32f
parent 56c89c12da3ef77ab6f627513829750535407f89

[libc++] Remove the _LIBCPP_BOOL_CONSTANT macro

I suspect this is a remnant of the times when we were not comfortable
using Clang's C++11/14 extensions everywhere, but now we do, so we can
use _BoolConstant instead and get rid of the macro.

Differential Revision: https://reviews.llvm.org/D122351

NOKEYCHECK=True
GitOrigin-RevId: f900f7025c7baf4f24dd6425cf0609182ee7efd5

include/exception

diff --git a/include/exception b/include/exception
index 5460b73..a60c8e6 100644
--- a/include/exception
+++ b/include/exception
@@ -300,10 +300,10 @@
 }
 
 template <class _From, class _To>
-struct __can_dynamic_cast : public _LIBCPP_BOOL_CONSTANT(
+struct __can_dynamic_cast : _BoolConstant<
               is_polymorphic<_From>::value &&
                  (!is_base_of<_To, _From>::value ||
-                   is_convertible<const _From*, const _To*>::value)) {};
+                   is_convertible<const _From*, const _To*>::value)> {};
 
 template <class _Ep>
 inline _LIBCPP_INLINE_VISIBILITY