This non-standard extension is redundant and unused by the library.
* include/std/type_traits (__is_nullptr_t): Add deprecated attribute. We support std::is_null_pointer so don't need a non-standard trait that does the same thing. Tested x86_64-linux, committed to trunk.
commit 8068073ad959c806a925b6c031965f6db6b70c90 Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Aug 14 12:26:24 2019 +0100 Deprecate std::__is_nullptr_t type trait This non-standard extension is redundant and unused by the library. * include/std/type_traits (__is_nullptr_t): Add deprecated attribute. diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index b31c26ab381..d3f853d4ce2 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -597,11 +597,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public __is_null_pointer_helper<typename remove_cv<_Tp>::type>::type { }; - /// __is_nullptr_t (extension). + /// __is_nullptr_t (deprecated extension). template<typename _Tp> struct __is_nullptr_t : public is_null_pointer<_Tp> - { }; + { } _GLIBCXX_DEPRECATED; // Composite type categories.