Change bool_constant to integral_constant.

bool_constant is C++17.

llvm-svn: 337576

diff --git a/llvm/include/llvm/ADT/STLExtras.h b/llvm/include/llvm/ADT/STLExtras.h
index d1756d4..94365dd 100644 (file)
--- a/llvm/include/llvm/ADT/STLExtras.h
+++ b/llvm/include/llvm/ADT/STLExtras.h
@@ -61,7 +61,8 @@ using ValueOfRange = typename std::remove_reference<decltype(
 //     Extra additions to <type_traits>
 //===----------------------------------------------------------------------===//
 
-template <typename T> struct negation : std::bool_constant<!bool(T::value)> {};
+template <typename T>
+struct negation : std::integral_constant<bool, !bool(T::value)> {};
 
 template <typename...> struct conjunction : std::true_type {};
 template <typename B1> struct conjunction<B1> : B1 {};