Implement the infrastructure for feature-test macros. Very few actual feature test macros, though. Reviewed as: https://reviews.llvm.org/D51955
llvm-svn: 342073
diff --git a/libcxx/include/functional b/libcxx/include/functional
index b91fd75..41beb40 100644
--- a/libcxx/include/functional
+++ b/libcxx/include/functional
@@ -487,6 +487,7 @@
#include <memory>
#include <tuple>
#include <utility>
+#include <version>
#include <__functional_base>
@@ -2340,8 +2341,6 @@
#if _LIBCPP_STD_VER > 14
-#define __cpp_lib_invoke 201411
-
template <class _Fn, class ..._Args>
result_of_t<_Fn&&(_Args&&...)>
invoke(_Fn&& __f, _Args&&... __args)