diff --git a/CMakeLists.txt b/CMakeLists.txt
index d8f7e578fe6858ed5a1bf440eb6df9565348b07f..d733aa7a097efef366879d8415411f13da895dde 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -731,12 +731,6 @@ set(KWSYS_CLASSES)
 set(KWSYS_H_FILES Configure SharedForward)
 set(KWSYS_HXX_FILES Configure String)
 
-if(NOT CMake_SOURCE_DIR)
-  set(KWSYS_HXX_FILES ${KWSYS_HXX_FILES}
-    hashtable hash_fun hash_map hash_set
-    )
-endif()
-
 # Add selected C++ classes.
 set(cppclasses
   Directory DynamicLoader Encoding Glob RegularExpression SystemTools
@@ -1071,11 +1065,6 @@ if(KWSYS_STANDALONE OR CMake_SOURCE_DIR)
     endforeach()
 
     # C++ tests
-    if(NOT WATCOM AND NOT CMake_SOURCE_DIR)
-      set(KWSYS_CXX_TESTS
-        testHashSTL.cxx
-        )
-    endif()
     set(KWSYS_CXX_TESTS ${KWSYS_CXX_TESTS}
       testConfigure.cxx
       testSystemTools.cxx
diff --git a/hash_fun.hxx.in b/hash_fun.hxx.in
deleted file mode 100644
index 8626c2aa2a19712bea58e63b6e5b781ccd372c22..0000000000000000000000000000000000000000
--- a/hash_fun.hxx.in
+++ /dev/null
@@ -1,166 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
-/*
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- */
-#ifndef @KWSYS_NAMESPACE@_hash_fun_hxx
-#define @KWSYS_NAMESPACE@_hash_fun_hxx
-
-#include <@KWSYS_NAMESPACE@/Configure.hxx>
-
-#include <stddef.h> // size_t
-#include <string>
-
-namespace @KWSYS_NAMESPACE@ {
-
-template <class _Key>
-struct hash
-{
-};
-
-inline size_t _stl_hash_string(const char* __s)
-{
-  unsigned long __h = 0;
-  for (; *__s; ++__s)
-    __h = 5 * __h + *__s;
-
-  return size_t(__h);
-}
-
-template <>
-struct hash<char*>
-{
-  size_t operator()(const char* __s) const { return _stl_hash_string(__s); }
-};
-
-template <>
-struct hash<const char*>
-{
-  size_t operator()(const char* __s) const { return _stl_hash_string(__s); }
-};
-
-template <>
-struct hash<std::string>
-{
-  size_t operator()(const std::string& __s) const
-  {
-    return _stl_hash_string(__s.c_str());
-  }
-};
-
-#if !defined(__BORLANDC__)
-template <>
-struct hash<const std::string>
-{
-  size_t operator()(const std::string& __s) const
-  {
-    return _stl_hash_string(__s.c_str());
-  }
-};
-#endif
-
-template <>
-struct hash<char>
-{
-  size_t operator()(char __x) const { return __x; }
-};
-
-template <>
-struct hash<unsigned char>
-{
-  size_t operator()(unsigned char __x) const { return __x; }
-};
-
-template <>
-struct hash<signed char>
-{
-  size_t operator()(unsigned char __x) const { return __x; }
-};
-
-template <>
-struct hash<short>
-{
-  size_t operator()(short __x) const { return __x; }
-};
-
-template <>
-struct hash<unsigned short>
-{
-  size_t operator()(unsigned short __x) const { return __x; }
-};
-
-template <>
-struct hash<int>
-{
-  size_t operator()(int __x) const { return __x; }
-};
-
-template <>
-struct hash<unsigned int>
-{
-  size_t operator()(unsigned int __x) const { return __x; }
-};
-
-template <>
-struct hash<long>
-{
-  size_t operator()(long __x) const { return __x; }
-};
-
-template <>
-struct hash<unsigned long>
-{
-  size_t operator()(unsigned long __x) const { return __x; }
-};
-
-// use long long or __int64
-#if @KWSYS_USE_LONG_LONG@
-template <>
-struct hash<long long>
-{
-  size_t operator()(long long __x) const { return __x; }
-};
-
-template <>
-struct hash<unsigned long long>
-{
-  size_t operator()(unsigned long long __x) const { return __x; }
-};
-#elif @KWSYS_USE___INT64@
-template <>
-struct hash<__int64>
-{
-  size_t operator()(__int64 __x) const { return __x; }
-};
-template <>
-struct hash<unsigned __int64>
-{
-  size_t operator()(unsigned __int64 __x) const { return __x; }
-};
-#endif // use long long or __int64
-
-} // namespace @KWSYS_NAMESPACE@
-
-#endif
diff --git a/hash_map.hxx.in b/hash_map.hxx.in
deleted file mode 100644
index 5f04e9c1680370ffd296a143fd05da94c9ccf58f..0000000000000000000000000000000000000000
--- a/hash_map.hxx.in
+++ /dev/null
@@ -1,423 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
-/*
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- */
-#ifndef @KWSYS_NAMESPACE@_hash_map_hxx
-#define @KWSYS_NAMESPACE@_hash_map_hxx
-
-#include <@KWSYS_NAMESPACE@/hashtable.hxx>
-
-#include <@KWSYS_NAMESPACE@/hash_fun.hxx>
-
-#include <functional> // equal_to
-
-#if defined(_MSC_VER)
-#  pragma warning(push)
-#  pragma warning(disable : 4284)
-#  pragma warning(disable : 4786)
-#endif
-
-#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
-#  pragma set woff 1174
-#  pragma set woff 1375
-#endif
-
-namespace @KWSYS_NAMESPACE@ {
-
-// select1st is an extension: it is not part of the standard.
-template <class T1, class T2>
-struct hash_select1st
-{
-  const T1& operator()(const std::pair<T1, T2>& __x) const
-  {
-    return __x.first;
-  }
-};
-
-// Forward declaration of equality operator; needed for friend declaration.
-
-template <class _Key, class _Tp, class _HashFcn = hash<_Key>,
-          class _EqualKey = std::equal_to<_Key>,
-          class _Alloc = std::allocator<char> >
-class hash_map;
-
-template <class _Key, class _Tp, class _HashFn, class _EqKey, class _Alloc>
-bool operator==(const hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc>&,
-                const hash_map<_Key, _Tp, _HashFn, _EqKey, _Alloc>&);
-
-template <class _Key, class _Tp, class _HashFcn, class _EqualKey, class _Alloc>
-class hash_map
-{
-private:
-  typedef hashtable<std::pair<const _Key, _Tp>, _Key, _HashFcn,
-                    hash_select1st<const _Key, _Tp>, _EqualKey, _Alloc>
-    _Ht;
-  _Ht _M_ht;
-
-public:
-  typedef typename _Ht::key_type key_type;
-  typedef _Tp data_type;
-  typedef _Tp mapped_type;
-  typedef typename _Ht::value_type value_type;
-  typedef typename _Ht::hasher hasher;
-  typedef typename _Ht::key_equal key_equal;
-
-  typedef typename _Ht::size_type size_type;
-  typedef typename _Ht::difference_type difference_type;
-  typedef typename _Ht::pointer pointer;
-  typedef typename _Ht::const_pointer const_pointer;
-  typedef typename _Ht::reference reference;
-  typedef typename _Ht::const_reference const_reference;
-
-  typedef typename _Ht::iterator iterator;
-  typedef typename _Ht::const_iterator const_iterator;
-
-  typedef typename _Ht::allocator_type allocator_type;
-
-  hasher hash_funct() const { return _M_ht.hash_funct(); }
-  key_equal key_eq() const { return _M_ht.key_eq(); }
-  allocator_type get_allocator() const { return _M_ht.get_allocator(); }
-
-public:
-  hash_map()
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-  }
-  explicit hash_map(size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-  }
-  hash_map(size_type __n, const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-  }
-  hash_map(size_type __n, const hasher& __hf, const key_equal& __eql,
-           const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-  }
-
-  template <class _InputIterator>
-  hash_map(_InputIterator __f, _InputIterator __l)
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_map(_InputIterator __f, _InputIterator __l, size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_map(_InputIterator __f, _InputIterator __l, size_type __n,
-           const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_map(_InputIterator __f, _InputIterator __l, size_type __n,
-           const hasher& __hf, const key_equal& __eql,
-           const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-
-public:
-  size_type size() const { return _M_ht.size(); }
-  size_type max_size() const { return _M_ht.max_size(); }
-  bool empty() const { return _M_ht.empty(); }
-  void swap(hash_map& __hs) { _M_ht.swap(__hs._M_ht); }
-
-  friend bool operator==<>(const hash_map&, const hash_map&);
-
-  iterator begin() { return _M_ht.begin(); }
-  iterator end() { return _M_ht.end(); }
-  const_iterator begin() const { return _M_ht.begin(); }
-  const_iterator end() const { return _M_ht.end(); }
-
-public:
-  std::pair<iterator, bool> insert(const value_type& __obj)
-  {
-    return _M_ht.insert_unique(__obj);
-  }
-  template <class _InputIterator>
-  void insert(_InputIterator __f, _InputIterator __l)
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  std::pair<iterator, bool> insert_noresize(const value_type& __obj)
-  {
-    return _M_ht.insert_unique_noresize(__obj);
-  }
-
-  iterator find(const key_type& __key) { return _M_ht.find(__key); }
-  const_iterator find(const key_type& __key) const
-  {
-    return _M_ht.find(__key);
-  }
-
-  _Tp& operator[](const key_type& __key)
-  {
-    return _M_ht.find_or_insert(value_type(__key, _Tp())).second;
-  }
-
-  size_type count(const key_type& __key) const { return _M_ht.count(__key); }
-
-  std::pair<iterator, iterator> equal_range(const key_type& __key)
-  {
-    return _M_ht.equal_range(__key);
-  }
-  std::pair<const_iterator, const_iterator> equal_range(
-    const key_type& __key) const
-  {
-    return _M_ht.equal_range(__key);
-  }
-
-  size_type erase(const key_type& __key) { return _M_ht.erase(__key); }
-  void erase(iterator __it) { _M_ht.erase(__it); }
-  void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); }
-  void clear() { _M_ht.clear(); }
-
-  void resize(size_type __hint) { _M_ht.resize(__hint); }
-  size_type bucket_count() const { return _M_ht.bucket_count(); }
-  size_type max_bucket_count() const { return _M_ht.max_bucket_count(); }
-  size_type elems_in_bucket(size_type __n) const
-  {
-    return _M_ht.elems_in_bucket(__n);
-  }
-};
-
-template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc>
-bool operator==(const hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm1,
-                const hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm2)
-{
-  return __hm1._M_ht == __hm2._M_ht;
-}
-
-template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc>
-inline bool operator!=(
-  const hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm1,
-  const hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm2)
-{
-  return !(__hm1 == __hm2);
-}
-
-template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc>
-inline void swap(hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm1,
-                 hash_map<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm2)
-{
-  __hm1.swap(__hm2);
-}
-
-// Forward declaration of equality operator; needed for friend declaration.
-
-template <class _Key, class _Tp, class _HashFcn = hash<_Key>,
-          class _EqualKey = std::equal_to<_Key>,
-          class _Alloc = std::allocator<char> >
-class hash_multimap;
-
-template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc>
-bool operator==(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1,
-                const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2);
-
-template <class _Key, class _Tp, class _HashFcn, class _EqualKey, class _Alloc>
-class hash_multimap
-{
-private:
-  typedef hashtable<std::pair<const _Key, _Tp>, _Key, _HashFcn,
-                    hash_select1st<const _Key, _Tp>, _EqualKey, _Alloc>
-    _Ht;
-  _Ht _M_ht;
-
-public:
-  typedef typename _Ht::key_type key_type;
-  typedef _Tp data_type;
-  typedef _Tp mapped_type;
-  typedef typename _Ht::value_type value_type;
-  typedef typename _Ht::hasher hasher;
-  typedef typename _Ht::key_equal key_equal;
-
-  typedef typename _Ht::size_type size_type;
-  typedef typename _Ht::difference_type difference_type;
-  typedef typename _Ht::pointer pointer;
-  typedef typename _Ht::const_pointer const_pointer;
-  typedef typename _Ht::reference reference;
-  typedef typename _Ht::const_reference const_reference;
-
-  typedef typename _Ht::iterator iterator;
-  typedef typename _Ht::const_iterator const_iterator;
-
-  typedef typename _Ht::allocator_type allocator_type;
-
-  hasher hash_funct() const { return _M_ht.hash_funct(); }
-  key_equal key_eq() const { return _M_ht.key_eq(); }
-  allocator_type get_allocator() const { return _M_ht.get_allocator(); }
-
-public:
-  hash_multimap()
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-  }
-  explicit hash_multimap(size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-  }
-  hash_multimap(size_type __n, const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-  }
-  hash_multimap(size_type __n, const hasher& __hf, const key_equal& __eql,
-                const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-  }
-
-  template <class _InputIterator>
-  hash_multimap(_InputIterator __f, _InputIterator __l)
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n,
-                const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multimap(_InputIterator __f, _InputIterator __l, size_type __n,
-                const hasher& __hf, const key_equal& __eql,
-                const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-
-public:
-  size_type size() const { return _M_ht.size(); }
-  size_type max_size() const { return _M_ht.max_size(); }
-  bool empty() const { return _M_ht.empty(); }
-  void swap(hash_multimap& __hs) { _M_ht.swap(__hs._M_ht); }
-
-  friend bool operator==<>(const hash_multimap&, const hash_multimap&);
-
-  iterator begin() { return _M_ht.begin(); }
-  iterator end() { return _M_ht.end(); }
-  const_iterator begin() const { return _M_ht.begin(); }
-  const_iterator end() const { return _M_ht.end(); }
-
-public:
-  iterator insert(const value_type& __obj)
-  {
-    return _M_ht.insert_equal(__obj);
-  }
-  template <class _InputIterator>
-  void insert(_InputIterator __f, _InputIterator __l)
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  iterator insert_noresize(const value_type& __obj)
-  {
-    return _M_ht.insert_equal_noresize(__obj);
-  }
-
-  iterator find(const key_type& __key) { return _M_ht.find(__key); }
-  const_iterator find(const key_type& __key) const
-  {
-    return _M_ht.find(__key);
-  }
-
-  size_type count(const key_type& __key) const { return _M_ht.count(__key); }
-
-  std::pair<iterator, iterator> equal_range(const key_type& __key)
-  {
-    return _M_ht.equal_range(__key);
-  }
-  std::pair<const_iterator, const_iterator> equal_range(
-    const key_type& __key) const
-  {
-    return _M_ht.equal_range(__key);
-  }
-
-  size_type erase(const key_type& __key) { return _M_ht.erase(__key); }
-  void erase(iterator __it) { _M_ht.erase(__it); }
-  void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); }
-  void clear() { _M_ht.clear(); }
-
-public:
-  void resize(size_type __hint) { _M_ht.resize(__hint); }
-  size_type bucket_count() const { return _M_ht.bucket_count(); }
-  size_type max_bucket_count() const { return _M_ht.max_bucket_count(); }
-  size_type elems_in_bucket(size_type __n) const
-  {
-    return _M_ht.elems_in_bucket(__n);
-  }
-};
-
-template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc>
-bool operator==(const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1,
-                const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2)
-{
-  return __hm1._M_ht == __hm2._M_ht;
-}
-
-template <class _Key, class _Tp, class _HF, class _EqKey, class _Alloc>
-inline bool operator!=(
-  const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm1,
-  const hash_multimap<_Key, _Tp, _HF, _EqKey, _Alloc>& __hm2)
-{
-  return !(__hm1 == __hm2);
-}
-
-template <class _Key, class _Tp, class _HashFcn, class _EqlKey, class _Alloc>
-inline void swap(hash_multimap<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm1,
-                 hash_multimap<_Key, _Tp, _HashFcn, _EqlKey, _Alloc>& __hm2)
-{
-  __hm1.swap(__hm2);
-}
-
-} // namespace @KWSYS_NAMESPACE@
-
-#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
-#  pragma reset woff 1174
-#  pragma reset woff 1375
-#endif
-
-#if defined(_MSC_VER)
-#  pragma warning(pop)
-#endif
-
-#endif
diff --git a/hash_set.hxx.in b/hash_set.hxx.in
deleted file mode 100644
index f4a37eebdb30095d58dc1385ed7032e0b42a2bdc..0000000000000000000000000000000000000000
--- a/hash_set.hxx.in
+++ /dev/null
@@ -1,392 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
-/*
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- */
-#ifndef @KWSYS_NAMESPACE@_hash_set_hxx
-#define @KWSYS_NAMESPACE@_hash_set_hxx
-
-#include <@KWSYS_NAMESPACE@/hashtable.hxx>
-
-#include <@KWSYS_NAMESPACE@/hash_fun.hxx>
-
-#include <functional> // equal_to
-
-#if defined(_MSC_VER)
-#  pragma warning(push)
-#  pragma warning(disable : 4284)
-#  pragma warning(disable : 4786)
-#endif
-
-#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
-#  pragma set woff 1174
-#  pragma set woff 1375
-#endif
-
-namespace @KWSYS_NAMESPACE@ {
-
-// identity is an extension: it is not part of the standard.
-template <class _Tp>
-struct _Identity
-{
-  const _Tp& operator()(const _Tp& __x) const { return __x; }
-};
-
-// Forward declaration of equality operator; needed for friend declaration.
-
-template <class _Value, class _HashFcn = hash<_Value>,
-          class _EqualKey = std::equal_to<_Value>,
-          class _Alloc = std::allocator<char> >
-class hash_set;
-
-template <class _Value, class _HashFcn, class _EqualKey, class _Alloc>
-bool operator==(const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs2);
-
-template <class _Value, class _HashFcn, class _EqualKey, class _Alloc>
-class hash_set
-{
-private:
-  typedef hashtable<_Value, _Value, _HashFcn, _Identity<_Value>, _EqualKey,
-                    _Alloc>
-    _Ht;
-  _Ht _M_ht;
-
-public:
-  typedef typename _Ht::key_type key_type;
-  typedef typename _Ht::value_type value_type;
-  typedef typename _Ht::hasher hasher;
-  typedef typename _Ht::key_equal key_equal;
-
-  typedef typename _Ht::size_type size_type;
-  typedef typename _Ht::difference_type difference_type;
-  typedef typename _Ht::const_pointer pointer;
-  typedef typename _Ht::const_pointer const_pointer;
-  typedef typename _Ht::const_reference reference;
-  typedef typename _Ht::const_reference const_reference;
-
-  typedef typename _Ht::const_iterator iterator;
-  typedef typename _Ht::const_iterator const_iterator;
-
-  typedef typename _Ht::allocator_type allocator_type;
-
-  hasher hash_funct() const { return _M_ht.hash_funct(); }
-  key_equal key_eq() const { return _M_ht.key_eq(); }
-  allocator_type get_allocator() const { return _M_ht.get_allocator(); }
-
-public:
-  hash_set()
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-  }
-  explicit hash_set(size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-  }
-  hash_set(size_type __n, const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-  }
-  hash_set(size_type __n, const hasher& __hf, const key_equal& __eql,
-           const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-  }
-
-  template <class _InputIterator>
-  hash_set(_InputIterator __f, _InputIterator __l)
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_set(_InputIterator __f, _InputIterator __l, size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_set(_InputIterator __f, _InputIterator __l, size_type __n,
-           const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_set(_InputIterator __f, _InputIterator __l, size_type __n,
-           const hasher& __hf, const key_equal& __eql,
-           const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-
-public:
-  size_type size() const { return _M_ht.size(); }
-  size_type max_size() const { return _M_ht.max_size(); }
-  bool empty() const { return _M_ht.empty(); }
-  void swap(hash_set& __hs) { _M_ht.swap(__hs._M_ht); }
-
-  friend bool operator==<>(const hash_set&, const hash_set&);
-
-  iterator begin() const { return _M_ht.begin(); }
-  iterator end() const { return _M_ht.end(); }
-
-public:
-  std::pair<iterator, bool> insert(const value_type& __obj)
-  {
-    typedef typename _Ht::iterator _Ht_iterator;
-    std::pair<_Ht_iterator, bool> __p = _M_ht.insert_unique(__obj);
-    return std::pair<iterator, bool>(__p.first, __p.second);
-  }
-  template <class _InputIterator>
-  void insert(_InputIterator __f, _InputIterator __l)
-  {
-    _M_ht.insert_unique(__f, __l);
-  }
-  std::pair<iterator, bool> insert_noresize(const value_type& __obj)
-  {
-    typedef typename _Ht::iterator _Ht_iterator;
-    std::pair<_Ht_iterator, bool> __p = _M_ht.insert_unique_noresize(__obj);
-    return std::pair<iterator, bool>(__p.first, __p.second);
-  }
-
-  iterator find(const key_type& __key) const { return _M_ht.find(__key); }
-
-  size_type count(const key_type& __key) const { return _M_ht.count(__key); }
-
-  std::pair<iterator, iterator> equal_range(const key_type& __key) const
-  {
-    return _M_ht.equal_range(__key);
-  }
-
-  size_type erase(const key_type& __key) { return _M_ht.erase(__key); }
-  void erase(iterator __it) { _M_ht.erase(__it); }
-  void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); }
-  void clear() { _M_ht.clear(); }
-
-public:
-  void resize(size_type __hint) { _M_ht.resize(__hint); }
-  size_type bucket_count() const { return _M_ht.bucket_count(); }
-  size_type max_bucket_count() const { return _M_ht.max_bucket_count(); }
-  size_type elems_in_bucket(size_type __n) const
-  {
-    return _M_ht.elems_in_bucket(__n);
-  }
-};
-
-template <class _Value, class _HashFcn, class _EqualKey, class _Alloc>
-bool operator==(const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  return __hs1._M_ht == __hs2._M_ht;
-}
-
-template <class _Value, class _HashFcn, class _EqualKey, class _Alloc>
-inline bool operator!=(
-  const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs1,
-  const hash_set<_Value, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  return !(__hs1 == __hs2);
-}
-
-template <class _Val, class _HashFcn, class _EqualKey, class _Alloc>
-inline void swap(hash_set<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                 hash_set<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  __hs1.swap(__hs2);
-}
-
-template <class _Value, class _HashFcn = hash<_Value>,
-          class _EqualKey = std::equal_to<_Value>,
-          class _Alloc = std::allocator<char> >
-class hash_multiset;
-
-template <class _Val, class _HashFcn, class _EqualKey, class _Alloc>
-bool operator==(const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2);
-
-template <class _Value, class _HashFcn, class _EqualKey, class _Alloc>
-class hash_multiset
-{
-private:
-  typedef hashtable<_Value, _Value, _HashFcn, _Identity<_Value>, _EqualKey,
-                    _Alloc>
-    _Ht;
-  _Ht _M_ht;
-
-public:
-  typedef typename _Ht::key_type key_type;
-  typedef typename _Ht::value_type value_type;
-  typedef typename _Ht::hasher hasher;
-  typedef typename _Ht::key_equal key_equal;
-
-  typedef typename _Ht::size_type size_type;
-  typedef typename _Ht::difference_type difference_type;
-  typedef typename _Ht::const_pointer pointer;
-  typedef typename _Ht::const_pointer const_pointer;
-  typedef typename _Ht::const_reference reference;
-  typedef typename _Ht::const_reference const_reference;
-
-  typedef typename _Ht::const_iterator iterator;
-  typedef typename _Ht::const_iterator const_iterator;
-
-  typedef typename _Ht::allocator_type allocator_type;
-
-  hasher hash_funct() const { return _M_ht.hash_funct(); }
-  key_equal key_eq() const { return _M_ht.key_eq(); }
-  allocator_type get_allocator() const { return _M_ht.get_allocator(); }
-
-public:
-  hash_multiset()
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-  }
-  explicit hash_multiset(size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-  }
-  hash_multiset(size_type __n, const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-  }
-  hash_multiset(size_type __n, const hasher& __hf, const key_equal& __eql,
-                const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-  }
-
-  template <class _InputIterator>
-  hash_multiset(_InputIterator __f, _InputIterator __l)
-    : _M_ht(100, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n)
-    : _M_ht(__n, hasher(), key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n,
-                const hasher& __hf)
-    : _M_ht(__n, __hf, key_equal(), allocator_type())
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  template <class _InputIterator>
-  hash_multiset(_InputIterator __f, _InputIterator __l, size_type __n,
-                const hasher& __hf, const key_equal& __eql,
-                const allocator_type& __a = allocator_type())
-    : _M_ht(__n, __hf, __eql, __a)
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-
-public:
-  size_type size() const { return _M_ht.size(); }
-  size_type max_size() const { return _M_ht.max_size(); }
-  bool empty() const { return _M_ht.empty(); }
-  void swap(hash_multiset& hs) { _M_ht.swap(hs._M_ht); }
-
-  friend bool operator==<>(const hash_multiset&, const hash_multiset&);
-
-  iterator begin() const { return _M_ht.begin(); }
-  iterator end() const { return _M_ht.end(); }
-
-public:
-  iterator insert(const value_type& __obj)
-  {
-    return _M_ht.insert_equal(__obj);
-  }
-  template <class _InputIterator>
-  void insert(_InputIterator __f, _InputIterator __l)
-  {
-    _M_ht.insert_equal(__f, __l);
-  }
-  iterator insert_noresize(const value_type& __obj)
-  {
-    return _M_ht.insert_equal_noresize(__obj);
-  }
-
-  iterator find(const key_type& __key) const { return _M_ht.find(__key); }
-
-  size_type count(const key_type& __key) const { return _M_ht.count(__key); }
-
-  std::pair<iterator, iterator> equal_range(const key_type& __key) const
-  {
-    return _M_ht.equal_range(__key);
-  }
-
-  size_type erase(const key_type& __key) { return _M_ht.erase(__key); }
-  void erase(iterator __it) { _M_ht.erase(__it); }
-  void erase(iterator __f, iterator __l) { _M_ht.erase(__f, __l); }
-  void clear() { _M_ht.clear(); }
-
-public:
-  void resize(size_type __hint) { _M_ht.resize(__hint); }
-  size_type bucket_count() const { return _M_ht.bucket_count(); }
-  size_type max_bucket_count() const { return _M_ht.max_bucket_count(); }
-  size_type elems_in_bucket(size_type __n) const
-  {
-    return _M_ht.elems_in_bucket(__n);
-  }
-};
-
-template <class _Val, class _HashFcn, class _EqualKey, class _Alloc>
-bool operator==(const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  return __hs1._M_ht == __hs2._M_ht;
-}
-
-template <class _Val, class _HashFcn, class _EqualKey, class _Alloc>
-inline bool operator!=(
-  const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
-  const hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  return !(__hs1 == __hs2);
-}
-
-template <class _Val, class _HashFcn, class _EqualKey, class _Alloc>
-inline void swap(hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs1,
-                 hash_multiset<_Val, _HashFcn, _EqualKey, _Alloc>& __hs2)
-{
-  __hs1.swap(__hs2);
-}
-
-} // namespace @KWSYS_NAMESPACE@
-
-#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
-#  pragma reset woff 1174
-#  pragma reset woff 1375
-#endif
-
-#if defined(_MSC_VER)
-#  pragma warning(pop)
-#endif
-
-#endif
diff --git a/hashtable.hxx.in b/hashtable.hxx.in
deleted file mode 100644
index 8c4b0025f53deca1f24cc155f86eee99c18da16b..0000000000000000000000000000000000000000
--- a/hashtable.hxx.in
+++ /dev/null
@@ -1,995 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
-/*
- * Copyright (c) 1996
- * Silicon Graphics Computer Systems, Inc.
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- *
- * Copyright (c) 1994
- * Hewlett-Packard Company
- *
- * Permission to use, copy, modify, distribute and sell this software
- * and its documentation for any purpose is hereby granted without fee,
- * provided that the above copyright notice appear in all copies and
- * that both that copyright notice and this permission notice appear
- * in supporting documentation.  Hewlett-Packard Company makes no
- * representations about the suitability of this software for any
- * purpose.  It is provided "as is" without express or implied warranty.
- *
- */
-#ifdef __BORLANDC__
-#  pragma warn - 8027 /* 'for' not inlined.  */
-#  pragma warn - 8026 /* 'exception' not inlined.  */
-#endif
-
-#ifndef @KWSYS_NAMESPACE@_hashtable_hxx
-#  define @KWSYS_NAMESPACE@_hashtable_hxx
-
-#  include <@KWSYS_NAMESPACE@/Configure.hxx>
-
-#  include <algorithm> // lower_bound
-#  include <iterator>  // iterator_traits
-#  include <memory>    // allocator
-#  include <stddef.h>  // size_t
-#  include <utility>   // pair
-#  include <vector>    // vector
-
-#  if defined(_MSC_VER)
-#    pragma warning(push)
-#    pragma warning(disable : 4284)
-#    pragma warning(disable : 4786)
-#    pragma warning(disable : 4512) /* no assignment operator for class */
-#  endif
-#  if defined(__sgi) && !defined(__GNUC__)
-#    pragma set woff 3970 /* pointer to int conversion */ 3321 3968
-#  endif
-
-// In C++11, clang will warn about using dynamic exception specifications
-// as they are deprecated.  But as this class is trying to faithfully
-// mimic unordered_set and unordered_map, we want to keep the 'throw()'
-// decorations below.  So we suppress the warning.
-#  if defined(__clang__) && defined(__has_warning)
-#    if __has_warning("-Wdeprecated")
-#      pragma clang diagnostic push
-#      pragma clang diagnostic ignored "-Wdeprecated"
-#    endif
-#  endif
-
-namespace @KWSYS_NAMESPACE@ {
-
-template <class _Val>
-struct _Hashtable_node
-{
-  _Hashtable_node* _M_next;
-  _Val _M_val;
-  void public_method_to_quiet_warning_about_all_methods_private();
-
-private:
-  void operator=(_Hashtable_node<_Val> const&) = delete;
-};
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc = std::allocator<char> >
-class hashtable;
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc>
-struct _Hashtable_iterator;
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc>
-struct _Hashtable_const_iterator;
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc>
-struct _Hashtable_iterator
-{
-  typedef hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>
-    _Hashtable;
-  typedef _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey,
-                              _Alloc>
-    iterator;
-  typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey,
-                                    _EqualKey, _Alloc>
-    const_iterator;
-  typedef _Hashtable_node<_Val> _Node;
-
-  typedef std::forward_iterator_tag iterator_category;
-  typedef _Val value_type;
-  typedef ptrdiff_t difference_type;
-  typedef size_t size_type;
-  typedef _Val& reference;
-  typedef _Val* pointer;
-
-  _Node* _M_cur;
-  _Hashtable* _M_ht;
-
-  _Hashtable_iterator(_Node* __n, _Hashtable* __tab)
-    : _M_cur(__n)
-    , _M_ht(__tab)
-  {
-  }
-  _Hashtable_iterator() {}
-  reference operator*() const { return _M_cur->_M_val; }
-  pointer operator->() const { return &(operator*()); }
-  iterator& operator++();
-  iterator operator++(int);
-  bool operator==(const iterator& __it) const { return _M_cur == __it._M_cur; }
-  bool operator!=(const iterator& __it) const { return _M_cur != __it._M_cur; }
-};
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc>
-struct _Hashtable_const_iterator
-{
-  typedef hashtable<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey, _Alloc>
-    _Hashtable;
-  typedef _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey,
-                              _Alloc>
-    iterator;
-  typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey,
-                                    _EqualKey, _Alloc>
-    const_iterator;
-  typedef _Hashtable_node<_Val> _Node;
-
-  typedef std::forward_iterator_tag iterator_category;
-  typedef _Val value_type;
-  typedef ptrdiff_t difference_type;
-  typedef size_t size_type;
-  typedef const _Val& reference;
-  typedef const _Val* pointer;
-
-  const _Node* _M_cur;
-  const _Hashtable* _M_ht;
-
-  _Hashtable_const_iterator(const _Node* __n, const _Hashtable* __tab)
-    : _M_cur(__n)
-    , _M_ht(__tab)
-  {
-  }
-  _Hashtable_const_iterator() {}
-  _Hashtable_const_iterator(const iterator& __it)
-    : _M_cur(__it._M_cur)
-    , _M_ht(__it._M_ht)
-  {
-  }
-  reference operator*() const { return _M_cur->_M_val; }
-  pointer operator->() const { return &(operator*()); }
-  const_iterator& operator++();
-  const_iterator operator++(int);
-  bool operator==(const const_iterator& __it) const
-  {
-    return _M_cur == __it._M_cur;
-  }
-  bool operator!=(const const_iterator& __it) const
-  {
-    return _M_cur != __it._M_cur;
-  }
-};
-
-// Note: assumes long is at least 32 bits.
-enum
-{
-  _stl_num_primes = 31
-};
-
-// create a function with a static local to that function that returns
-// the static
-static inline const unsigned long* get_stl_prime_list()
-{
-
-  static const unsigned long _stl_prime_list[_stl_num_primes] = {
-    5ul,         11ul,        23ul,        53ul,         97ul,
-    193ul,       389ul,       769ul,       1543ul,       3079ul,
-    6151ul,      12289ul,     24593ul,     49157ul,      98317ul,
-    196613ul,    393241ul,    786433ul,    1572869ul,    3145739ul,
-    6291469ul,   12582917ul,  25165843ul,  50331653ul,   100663319ul,
-    201326611ul, 402653189ul, 805306457ul, 1610612741ul, 3221225473ul,
-    4294967291ul
-  };
-
-  return &_stl_prime_list[0];
-}
-
-static inline size_t _stl_next_prime(size_t __n)
-{
-  const unsigned long* __first = get_stl_prime_list();
-  const unsigned long* __last = get_stl_prime_list() + (int)_stl_num_primes;
-  const unsigned long* pos = std::lower_bound(__first, __last, __n);
-  return pos == __last ? *(__last - 1) : *pos;
-}
-
-// Forward declaration of operator==.
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-class hashtable;
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-bool operator==(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1,
-                const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2);
-
-// Hashtables handle allocators a bit differently than other containers
-//  do.  If we're using standard-conforming allocators, then a hashtable
-//  unconditionally has a member variable to hold its allocator, even if
-//  it so happens that all instances of the allocator type are identical.
-// This is because, for hashtables, this extra storage is negligible.
-//  Additionally, a base class wouldn't serve any other purposes; it
-//  wouldn't, for example, simplify the exception-handling code.
-
-template <class _Val, class _Key, class _HashFcn, class _ExtractKey,
-          class _EqualKey, class _Alloc>
-class hashtable
-{
-public:
-  typedef _Key key_type;
-  typedef _Val value_type;
-  typedef _HashFcn hasher;
-  typedef _EqualKey key_equal;
-
-  typedef size_t size_type;
-  typedef ptrdiff_t difference_type;
-  typedef value_type* pointer;
-  typedef const value_type* const_pointer;
-  typedef value_type& reference;
-  typedef const value_type& const_reference;
-
-  hasher hash_funct() const { return _M_hash; }
-  key_equal key_eq() const { return _M_equals; }
-
-private:
-  typedef _Hashtable_node<_Val> _Node;
-
-public:
-  typedef typename _Alloc::template rebind<_Val>::other allocator_type;
-  allocator_type get_allocator() const { return _M_node_allocator; }
-
-private:
-  typedef
-    typename _Alloc::template rebind<_Node>::other _M_node_allocator_type;
-  typedef
-    typename _Alloc::template rebind<_Node*>::other _M_node_ptr_allocator_type;
-  typedef std::vector<_Node*, _M_node_ptr_allocator_type> _M_buckets_type;
-
-private:
-  _M_node_allocator_type _M_node_allocator;
-  hasher _M_hash;
-  key_equal _M_equals;
-  _ExtractKey _M_get_key;
-  _M_buckets_type _M_buckets;
-  size_type _M_num_elements;
-
-  _Node* _M_get_node() { return _M_node_allocator.allocate(1); }
-  void _M_put_node(_Node* __p) { _M_node_allocator.deallocate(__p, 1); }
-
-public:
-  typedef _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey, _EqualKey,
-                              _Alloc>
-    iterator;
-  typedef _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey,
-                                    _EqualKey, _Alloc>
-    const_iterator;
-
-  friend struct _Hashtable_iterator<_Val, _Key, _HashFcn, _ExtractKey,
-                                    _EqualKey, _Alloc>;
-  friend struct _Hashtable_const_iterator<_Val, _Key, _HashFcn, _ExtractKey,
-                                          _EqualKey, _Alloc>;
-
-public:
-  hashtable(size_type __n, const _HashFcn& __hf, const _EqualKey& __eql,
-            const _ExtractKey& __ext,
-            const allocator_type& __a = allocator_type())
-    : _M_node_allocator(__a)
-    , _M_hash(__hf)
-    , _M_equals(__eql)
-    , _M_get_key(__ext)
-    , _M_buckets(__a)
-    , _M_num_elements(0)
-  {
-    _M_initialize_buckets(__n);
-  }
-
-  hashtable(size_type __n, const _HashFcn& __hf, const _EqualKey& __eql,
-            const allocator_type& __a = allocator_type())
-    : _M_node_allocator(__a)
-    , _M_hash(__hf)
-    , _M_equals(__eql)
-    , _M_get_key(_ExtractKey())
-    , _M_buckets(__a)
-    , _M_num_elements(0)
-  {
-    _M_initialize_buckets(__n);
-  }
-
-  hashtable(const hashtable& __ht)
-    : _M_node_allocator(__ht.get_allocator())
-    , _M_hash(__ht._M_hash)
-    , _M_equals(__ht._M_equals)
-    , _M_get_key(__ht._M_get_key)
-    , _M_buckets(__ht.get_allocator())
-    , _M_num_elements(0)
-  {
-    _M_copy_from(__ht);
-  }
-
-  hashtable& operator=(const hashtable& __ht)
-  {
-    if (&__ht != this) {
-      clear();
-      _M_hash = __ht._M_hash;
-      _M_equals = __ht._M_equals;
-      _M_get_key = __ht._M_get_key;
-      _M_copy_from(__ht);
-    }
-    return *this;
-  }
-
-  ~hashtable() { clear(); }
-
-  size_type size() const { return _M_num_elements; }
-  size_type max_size() const { return size_type(-1); }
-  bool empty() const { return size() == 0; }
-
-  void swap(hashtable& __ht)
-  {
-    std::swap(_M_hash, __ht._M_hash);
-    std::swap(_M_equals, __ht._M_equals);
-    std::swap(_M_get_key, __ht._M_get_key);
-    _M_buckets.swap(__ht._M_buckets);
-    std::swap(_M_num_elements, __ht._M_num_elements);
-  }
-
-  iterator begin()
-  {
-    for (size_type __n = 0; __n < _M_buckets.size(); ++__n)
-      if (_M_buckets[__n])
-        return iterator(_M_buckets[__n], this);
-    return end();
-  }
-
-  iterator end() { return iterator(nullptr, this); }
-
-  const_iterator begin() const
-  {
-    for (size_type __n = 0; __n < _M_buckets.size(); ++__n)
-      if (_M_buckets[__n])
-        return const_iterator(_M_buckets[__n], this);
-    return end();
-  }
-
-  const_iterator end() const { return const_iterator(nullptr, this); }
-
-  friend bool operator==<>(const hashtable&, const hashtable&);
-
-public:
-  size_type bucket_count() const { return _M_buckets.size(); }
-
-  size_type max_bucket_count() const
-  {
-    return get_stl_prime_list()[(int)_stl_num_primes - 1];
-  }
-
-  size_type elems_in_bucket(size_type __bucket) const
-  {
-    size_type __result = 0;
-    for (_Node* __cur = _M_buckets[__bucket]; __cur; __cur = __cur->_M_next)
-      __result += 1;
-    return __result;
-  }
-
-  std::pair<iterator, bool> insert_unique(const value_type& __obj)
-  {
-    resize(_M_num_elements + 1);
-    return insert_unique_noresize(__obj);
-  }
-
-  iterator insert_equal(const value_type& __obj)
-  {
-    resize(_M_num_elements + 1);
-    return insert_equal_noresize(__obj);
-  }
-
-  std::pair<iterator, bool> insert_unique_noresize(const value_type& __obj);
-  iterator insert_equal_noresize(const value_type& __obj);
-
-  template <class _InputIterator>
-  void insert_unique(_InputIterator __f, _InputIterator __l)
-  {
-    insert_unique(
-      __f, __l,
-      typename std::iterator_traits<_InputIterator>::iterator_category());
-  }
-
-  template <class _InputIterator>
-  void insert_equal(_InputIterator __f, _InputIterator __l)
-  {
-    insert_equal(
-      __f, __l,
-      typename std::iterator_traits<_InputIterator>::iterator_category());
-  }
-
-  template <class _InputIterator>
-  void insert_unique(_InputIterator __f, _InputIterator __l,
-                     std::input_iterator_tag)
-  {
-    for (; __f != __l; ++__f)
-      insert_unique(*__f);
-  }
-
-  template <class _InputIterator>
-  void insert_equal(_InputIterator __f, _InputIterator __l,
-                    std::input_iterator_tag)
-  {
-    for (; __f != __l; ++__f)
-      insert_equal(*__f);
-  }
-
-  template <class _ForwardIterator>
-  void insert_unique(_ForwardIterator __f, _ForwardIterator __l,
-                     std::forward_iterator_tag)
-  {
-    size_type __n = 0;
-    std::distance(__f, __l, __n);
-    resize(_M_num_elements + __n);
-    for (; __n > 0; --__n, ++__f)
-      insert_unique_noresize(*__f);
-  }
-
-  template <class _ForwardIterator>
-  void insert_equal(_ForwardIterator __f, _ForwardIterator __l,
-                    std::forward_iterator_tag)
-  {
-    size_type __n = 0;
-    std::distance(__f, __l, __n);
-    resize(_M_num_elements + __n);
-    for (; __n > 0; --__n, ++__f)
-      insert_equal_noresize(*__f);
-  }
-
-  reference find_or_insert(const value_type& __obj);
-
-  iterator find(const key_type& __key)
-  {
-    size_type __n = _M_bkt_num_key(__key);
-    _Node* __first;
-    for (__first = _M_buckets[__n];
-         __first && !_M_equals(_M_get_key(__first->_M_val), __key);
-         __first = __first->_M_next) {
-    }
-    return iterator(__first, this);
-  }
-
-  const_iterator find(const key_type& __key) const
-  {
-    size_type __n = _M_bkt_num_key(__key);
-    const _Node* __first;
-    for (__first = _M_buckets[__n];
-         __first && !_M_equals(_M_get_key(__first->_M_val), __key);
-         __first = __first->_M_next) {
-    }
-    return const_iterator(__first, this);
-  }
-
-  size_type count(const key_type& __key) const
-  {
-    const size_type __n = _M_bkt_num_key(__key);
-    size_type __result = 0;
-
-    for (const _Node* __cur = _M_buckets[__n]; __cur; __cur = __cur->_M_next)
-      if (_M_equals(_M_get_key(__cur->_M_val), __key))
-        ++__result;
-    return __result;
-  }
-
-  std::pair<iterator, iterator> equal_range(const key_type& __key);
-
-  std::pair<const_iterator, const_iterator> equal_range(
-    const key_type& __key) const;
-
-  size_type erase(const key_type& __key);
-  void erase(const iterator& __it);
-  void erase(iterator __first, iterator __last);
-
-  void erase(const const_iterator& __it);
-  void erase(const_iterator __first, const_iterator __last);
-
-  void resize(size_type __num_elements_hint);
-  void clear();
-
-private:
-  size_type _M_next_size(size_type __n) const { return _stl_next_prime(__n); }
-
-  void _M_initialize_buckets(size_type __n)
-  {
-    const size_type __n_buckets = _M_next_size(__n);
-    _M_buckets.reserve(__n_buckets);
-    _M_buckets.insert(_M_buckets.end(), __n_buckets, (_Node*)nullptr);
-    _M_num_elements = 0;
-  }
-
-  size_type _M_bkt_num_key(const key_type& __key) const
-  {
-    return _M_bkt_num_key(__key, _M_buckets.size());
-  }
-
-  size_type _M_bkt_num(const value_type& __obj) const
-  {
-    return _M_bkt_num_key(_M_get_key(__obj));
-  }
-
-  size_type _M_bkt_num_key(const key_type& __key, size_t __n) const
-  {
-    return _M_hash(__key) % __n;
-  }
-
-  size_type _M_bkt_num(const value_type& __obj, size_t __n) const
-  {
-    return _M_bkt_num_key(_M_get_key(__obj), __n);
-  }
-
-  void construct(_Val* p, const _Val& v) { new (p) _Val(v); }
-  void destroy(_Val* p)
-  {
-    (void)p;
-    p->~_Val();
-  }
-
-  _Node* _M_new_node(const value_type& __obj)
-  {
-    _Node* __n = _M_get_node();
-    __n->_M_next = nullptr;
-    try {
-      construct(&__n->_M_val, __obj);
-      return __n;
-    } catch (...) {
-      _M_put_node(__n);
-      throw;
-    }
-  }
-
-  void _M_delete_node(_Node* __n)
-  {
-    destroy(&__n->_M_val);
-    _M_put_node(__n);
-  }
-
-  void _M_erase_bucket(const size_type __n, _Node* __first, _Node* __last);
-  void _M_erase_bucket(const size_type __n, _Node* __last);
-
-  void _M_copy_from(const hashtable& __ht);
-};
-
-template <class _Val, class _Key, class _HF, class _ExK, class _EqK,
-          class _All>
-_Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>&
-_Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>::operator++()
-{
-  const _Node* __old = _M_cur;
-  _M_cur = _M_cur->_M_next;
-  if (!_M_cur) {
-    size_type __bucket = _M_ht->_M_bkt_num(__old->_M_val);
-    while (!_M_cur && ++__bucket < _M_ht->_M_buckets.size())
-      _M_cur = _M_ht->_M_buckets[__bucket];
-  }
-  return *this;
-}
-
-template <class _Val, class _Key, class _HF, class _ExK, class _EqK,
-          class _All>
-inline _Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>
-_Hashtable_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>::operator++(int)
-{
-  iterator __tmp = *this;
-  ++*this;
-  return __tmp;
-}
-
-template <class _Val, class _Key, class _HF, class _ExK, class _EqK,
-          class _All>
-_Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>&
-_Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>::operator++()
-{
-  const _Node* __old = _M_cur;
-  _M_cur = _M_cur->_M_next;
-  if (!_M_cur) {
-    size_type __bucket = _M_ht->_M_bkt_num(__old->_M_val);
-    while (!_M_cur && ++__bucket < _M_ht->_M_buckets.size())
-      _M_cur = _M_ht->_M_buckets[__bucket];
-  }
-  return *this;
-}
-
-template <class _Val, class _Key, class _HF, class _ExK, class _EqK,
-          class _All>
-inline _Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>
-_Hashtable_const_iterator<_Val, _Key, _HF, _ExK, _EqK, _All>::operator++(int)
-{
-  const_iterator __tmp = *this;
-  ++*this;
-  return __tmp;
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-bool operator==(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1,
-                const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2)
-{
-  typedef typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::_Node _Node;
-  if (__ht1._M_buckets.size() != __ht2._M_buckets.size())
-    return false;
-  for (int __n = 0; __n < __ht1._M_buckets.size(); ++__n) {
-    _Node* __cur1 = __ht1._M_buckets[__n];
-    _Node* __cur2 = __ht2._M_buckets[__n];
-    for (; __cur1 && __cur2 && __cur1->_M_val == __cur2->_M_val;
-         __cur1 = __cur1->_M_next, __cur2 = __cur2->_M_next) {
-    }
-    if (__cur1 || __cur2)
-      return false;
-  }
-  return true;
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-inline bool operator!=(const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht1,
-                       const hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>& __ht2)
-{
-  return !(__ht1 == __ht2);
-}
-
-template <class _Val, class _Key, class _HF, class _Extract, class _EqKey,
-          class _All>
-inline void swap(hashtable<_Val, _Key, _HF, _Extract, _EqKey, _All>& __ht1,
-                 hashtable<_Val, _Key, _HF, _Extract, _EqKey, _All>& __ht2)
-{
-  __ht1.swap(__ht2);
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-std::pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator, bool>
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::insert_unique_noresize(
-  const value_type& __obj)
-{
-  const size_type __n = _M_bkt_num(__obj);
-  _Node* __first = _M_buckets[__n];
-
-  for (_Node* __cur = __first; __cur; __cur = __cur->_M_next)
-    if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj)))
-      return std::pair<iterator, bool>(iterator(__cur, this), false);
-
-  _Node* __tmp = _M_new_node(__obj);
-  __tmp->_M_next = __first;
-  _M_buckets[__n] = __tmp;
-  ++_M_num_elements;
-  return std::pair<iterator, bool>(iterator(__tmp, this), true);
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::insert_equal_noresize(
-  const value_type& __obj)
-{
-  const size_type __n = _M_bkt_num(__obj);
-  _Node* __first = _M_buckets[__n];
-
-  for (_Node* __cur = __first; __cur; __cur = __cur->_M_next)
-    if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj))) {
-      _Node* __tmp = _M_new_node(__obj);
-      __tmp->_M_next = __cur->_M_next;
-      __cur->_M_next = __tmp;
-      ++_M_num_elements;
-      return iterator(__tmp, this);
-    }
-
-  _Node* __tmp = _M_new_node(__obj);
-  __tmp->_M_next = __first;
-  _M_buckets[__n] = __tmp;
-  ++_M_num_elements;
-  return iterator(__tmp, this);
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::reference
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::find_or_insert(
-  const value_type& __obj)
-{
-  resize(_M_num_elements + 1);
-
-  size_type __n = _M_bkt_num(__obj);
-  _Node* __first = _M_buckets[__n];
-
-  for (_Node* __cur = __first; __cur; __cur = __cur->_M_next)
-    if (_M_equals(_M_get_key(__cur->_M_val), _M_get_key(__obj)))
-      return __cur->_M_val;
-
-  _Node* __tmp = _M_new_node(__obj);
-  __tmp->_M_next = __first;
-  _M_buckets[__n] = __tmp;
-  ++_M_num_elements;
-  return __tmp->_M_val;
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-std::pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator,
-          typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::iterator>
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::equal_range(const key_type& __key)
-{
-  typedef std::pair<iterator, iterator> _Pii;
-  const size_type __n = _M_bkt_num_key(__key);
-
-  for (_Node* __first = _M_buckets[__n]; __first; __first = __first->_M_next)
-    if (_M_equals(_M_get_key(__first->_M_val), __key)) {
-      for (_Node* __cur = __first->_M_next; __cur; __cur = __cur->_M_next)
-        if (!_M_equals(_M_get_key(__cur->_M_val), __key))
-          return _Pii(iterator(__first, this), iterator(__cur, this));
-      for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m)
-        if (_M_buckets[__m])
-          return _Pii(iterator(__first, this),
-                      iterator(_M_buckets[__m], this));
-      return _Pii(iterator(__first, this), end());
-    }
-  return _Pii(end(), end());
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-std::pair<typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator,
-          typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::const_iterator>
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::equal_range(
-  const key_type& __key) const
-{
-  typedef std::pair<const_iterator, const_iterator> _Pii;
-  const size_type __n = _M_bkt_num_key(__key);
-
-  for (const _Node* __first = _M_buckets[__n]; __first;
-       __first = __first->_M_next) {
-    if (_M_equals(_M_get_key(__first->_M_val), __key)) {
-      for (const _Node* __cur = __first->_M_next; __cur;
-           __cur = __cur->_M_next)
-        if (!_M_equals(_M_get_key(__cur->_M_val), __key))
-          return _Pii(const_iterator(__first, this),
-                      const_iterator(__cur, this));
-      for (size_type __m = __n + 1; __m < _M_buckets.size(); ++__m)
-        if (_M_buckets[__m])
-          return _Pii(const_iterator(__first, this),
-                      const_iterator(_M_buckets[__m], this));
-      return _Pii(const_iterator(__first, this), end());
-    }
-  }
-  return _Pii(end(), end());
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-typename hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::size_type
-hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::erase(const key_type& __key)
-{
-  const size_type __n = _M_bkt_num_key(__key);
-  _Node* __first = _M_buckets[__n];
-  size_type __erased = 0;
-
-  if (__first) {
-    _Node* __cur = __first;
-    _Node* __next = __cur->_M_next;
-    while (__next) {
-      if (_M_equals(_M_get_key(__next->_M_val), __key)) {
-        __cur->_M_next = __next->_M_next;
-        _M_delete_node(__next);
-        __next = __cur->_M_next;
-        ++__erased;
-        --_M_num_elements;
-      } else {
-        __cur = __next;
-        __next = __cur->_M_next;
-      }
-    }
-    if (_M_equals(_M_get_key(__first->_M_val), __key)) {
-      _M_buckets[__n] = __first->_M_next;
-      _M_delete_node(__first);
-      ++__erased;
-      --_M_num_elements;
-    }
-  }
-  return __erased;
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::erase(const iterator& __it)
-{
-  _Node* __p = __it._M_cur;
-  if (__p) {
-    const size_type __n = _M_bkt_num(__p->_M_val);
-    _Node* __cur = _M_buckets[__n];
-
-    if (__cur == __p) {
-      _M_buckets[__n] = __cur->_M_next;
-      _M_delete_node(__cur);
-      --_M_num_elements;
-    } else {
-      _Node* __next = __cur->_M_next;
-      while (__next) {
-        if (__next == __p) {
-          __cur->_M_next = __next->_M_next;
-          _M_delete_node(__next);
-          --_M_num_elements;
-          break;
-        } else {
-          __cur = __next;
-          __next = __cur->_M_next;
-        }
-      }
-    }
-  }
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::erase(iterator __first,
-                                                       iterator __last)
-{
-  size_type __f_bucket =
-    __first._M_cur ? _M_bkt_num(__first._M_cur->_M_val) : _M_buckets.size();
-  size_type __l_bucket =
-    __last._M_cur ? _M_bkt_num(__last._M_cur->_M_val) : _M_buckets.size();
-
-  if (__first._M_cur == __last._M_cur)
-    return;
-  else if (__f_bucket == __l_bucket)
-    _M_erase_bucket(__f_bucket, __first._M_cur, __last._M_cur);
-  else {
-    _M_erase_bucket(__f_bucket, __first._M_cur, nullptr);
-    for (size_type __n = __f_bucket + 1; __n < __l_bucket; ++__n)
-      _M_erase_bucket(__n, nullptr);
-    if (__l_bucket != _M_buckets.size())
-      _M_erase_bucket(__l_bucket, __last._M_cur);
-  }
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-inline void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::erase(
-  const_iterator __first, const_iterator __last)
-{
-  erase(iterator(const_cast<_Node*>(__first._M_cur),
-                 const_cast<hashtable*>(__first._M_ht)),
-        iterator(const_cast<_Node*>(__last._M_cur),
-                 const_cast<hashtable*>(__last._M_ht)));
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-inline void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::erase(
-  const const_iterator& __it)
-{
-  erase(iterator(const_cast<_Node*>(__it._M_cur),
-                 const_cast<hashtable*>(__it._M_ht)));
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::resize(
-  size_type __num_elements_hint)
-{
-  const size_type __old_n = _M_buckets.size();
-  if (__num_elements_hint > __old_n) {
-    const size_type __n = _M_next_size(__num_elements_hint);
-    if (__n > __old_n) {
-      _M_buckets_type __tmp(__n, (_Node*)(nullptr),
-                            _M_buckets.get_allocator());
-      try {
-        for (size_type __bucket = 0; __bucket < __old_n; ++__bucket) {
-          _Node* __first = _M_buckets[__bucket];
-          while (__first) {
-            size_type __new_bucket = _M_bkt_num(__first->_M_val, __n);
-            _M_buckets[__bucket] = __first->_M_next;
-            __first->_M_next = __tmp[__new_bucket];
-            __tmp[__new_bucket] = __first;
-            __first = _M_buckets[__bucket];
-          }
-        }
-        _M_buckets.swap(__tmp);
-      } catch (...) {
-        for (size_type __bucket = 0; __bucket < __tmp.size(); ++__bucket) {
-          while (__tmp[__bucket]) {
-            _Node* __next = __tmp[__bucket]->_M_next;
-            _M_delete_node(__tmp[__bucket]);
-            __tmp[__bucket] = __next;
-          }
-        }
-        throw;
-      }
-    }
-  }
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::_M_erase_bucket(
-  const size_type __n, _Node* __first, _Node* __last)
-{
-  _Node* __cur = _M_buckets[__n];
-  if (__cur == __first)
-    _M_erase_bucket(__n, __last);
-  else {
-    _Node* __next;
-    for (__next = __cur->_M_next; __next != __first;
-         __cur = __next, __next = __cur->_M_next)
-      ;
-    while (__next != __last) {
-      __cur->_M_next = __next->_M_next;
-      _M_delete_node(__next);
-      __next = __cur->_M_next;
-      --_M_num_elements;
-    }
-  }
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::_M_erase_bucket(
-  const size_type __n, _Node* __last)
-{
-  _Node* __cur = _M_buckets[__n];
-  while (__cur != __last) {
-    _Node* __next = __cur->_M_next;
-    _M_delete_node(__cur);
-    __cur = __next;
-    _M_buckets[__n] = __cur;
-    --_M_num_elements;
-  }
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::clear()
-{
-  for (size_type __i = 0; __i < _M_buckets.size(); ++__i) {
-    _Node* __cur = _M_buckets[__i];
-    while (__cur != nullptr) {
-      _Node* __next = __cur->_M_next;
-      _M_delete_node(__cur);
-      __cur = __next;
-    }
-    _M_buckets[__i] = nullptr;
-  }
-  _M_num_elements = 0;
-}
-
-template <class _Val, class _Key, class _HF, class _Ex, class _Eq, class _All>
-void hashtable<_Val, _Key, _HF, _Ex, _Eq, _All>::_M_copy_from(
-  const hashtable& __ht)
-{
-  _M_buckets.clear();
-  _M_buckets.reserve(__ht._M_buckets.size());
-  _M_buckets.insert(_M_buckets.end(), __ht._M_buckets.size(), (_Node*)nullptr);
-  try {
-    for (size_type __i = 0; __i < __ht._M_buckets.size(); ++__i) {
-      const _Node* __cur = __ht._M_buckets[__i];
-      if (__cur) {
-        _Node* __copy = _M_new_node(__cur->_M_val);
-        _M_buckets[__i] = __copy;
-
-        for (_Node* __next = __cur->_M_next; __next;
-             __cur = __next, __next = __cur->_M_next) {
-          __copy->_M_next = _M_new_node(__next->_M_val);
-          __copy = __copy->_M_next;
-        }
-      }
-    }
-    _M_num_elements = __ht._M_num_elements;
-  } catch (...) {
-    clear();
-    throw;
-  }
-}
-
-} // namespace @KWSYS_NAMESPACE@
-
-// Undo warning suppression.
-#  if defined(__clang__) && defined(__has_warning)
-#    if __has_warning("-Wdeprecated")
-#      pragma clang diagnostic pop
-#    endif
-#  endif
-
-#  if defined(_MSC_VER)
-#    pragma warning(pop)
-#  endif
-
-#endif
diff --git a/testHashSTL.cxx b/testHashSTL.cxx
deleted file mode 100644
index 18cae7ff84afac4b8a316872324fd1312e35f6a3..0000000000000000000000000000000000000000
--- a/testHashSTL.cxx
+++ /dev/null
@@ -1,64 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing#kwsys for details.  */
-#include "kwsysPrivate.h"
-#include KWSYS_HEADER(hash_map.hxx)
-#include KWSYS_HEADER(hash_set.hxx)
-
-// Work-around CMake dependency scanning limitation.  This must
-// duplicate the above list of headers.
-#if 0
-#  include "hash_map.hxx.in"
-#  include "hash_set.hxx.in"
-#endif
-
-#include <iostream>
-
-#if defined(_MSC_VER)
-#  pragma warning(disable : 4786)
-#endif
-
-#if defined(__sgi) && !defined(__GNUC__)
-#  pragma set woff 1468 /* inline function cannot be explicitly instantiated  \
-                         */
-#endif
-
-template class kwsys::hash_map<const char*, int>;
-template class kwsys::hash_set<int>;
-
-static bool test_hash_map()
-{
-  using mtype = kwsys::hash_map<const char*, int>;
-  mtype m;
-  const char* keys[] = { "hello", "world" };
-  m[keys[0]] = 1;
-  m.insert(mtype::value_type(keys[1], 2));
-  int sum = 0;
-  for (auto& mi : m) {
-    std::cout << "Found entry [" << mi.first << "," << mi.second << "]"
-              << std::endl;
-    sum += mi.second;
-  }
-  return sum == 3;
-}
-
-static bool test_hash_set()
-{
-  using stype = kwsys::hash_set<int>;
-  stype s;
-  s.insert(1);
-  s.insert(2);
-  int sum = 0;
-  for (int si : s) {
-    std::cout << "Found entry [" << si << "]" << std::endl;
-    sum += si;
-  }
-  return sum == 3;
-}
-
-int testHashSTL(int, char* [])
-{
-  bool result = true;
-  result = test_hash_map() && result;
-  result = test_hash_set() && result;
-  return result ? 0 : 1;
-}