Update copyright years.

[thirdparty/gcc.git] / libstdc++-v3 / include / bits / functional_hash.h

diff --git a/libstdc++-v3/include/bits/functional_hash.h b/libstdc++-v3/include/bits/functional_hash.h
index 0f20b956b7667ac2727c85f09c68f48205952a18..6ca79154fe01b39b1f5cdeb4526f620cba8b59c5 100644 (file)
--- a/libstdc++-v3/include/bits/functional_hash.h
+++ b/libstdc++-v3/include/bits/functional_hash.h
@@ -1,6 +1,6 @@
 // functional_hash.h header -*- C++ -*-
 
-// Copyright (C) 2007-2018 Free Software Foundation, Inc.
+// Copyright (C) 2007-2020 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the
@@ -135,6 +135,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// Explicit specialization for wchar_t.
   _Cxx_hashtable_define_trivial_hash(wchar_t)
 
+#ifdef _GLIBCXX_USE_CHAR8_T
+  /// Explicit specialization for char8_t.
+  _Cxx_hashtable_define_trivial_hash(char8_t)
+#endif
+
   /// Explicit specialization for char16_t.
   _Cxx_hashtable_define_trivial_hash(char16_t)
 
@@ -254,6 +259,16 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       operator()(long double __val) const noexcept;
     };
 
+#if __cplusplus >= 201703L
+  template<>
+    struct hash<nullptr_t> : public __hash_base<size_t, nullptr_t>
+    {
+      size_t
+      operator()(nullptr_t) const noexcept
+      { return 0; }
+    };
+#endif
+
   // @} group hashes
 
   // Hint about performance of hash functor. If not fast the hash-based