bsl/cstddef_8hpp_source.html

 #ifndef BSL_CSTDDEF_HPP
 #define BSL_CSTDDEF_HPP

 namespace bsl
 {
     using nullptr_t = decltype(nullptr);
 }

 #endif
bsl::nullptr_t
decltype(nullptr) nullptr_t
defines a nullptr type
Definition: cstddef.hpp:34