Add C++23 header macros.

test/all/Jamfile.v2

@@ -1,7 +1,7 @@
 #
 # Regression test Jamfile for boost configuration setup.
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Sun Jun  5 16:50:18 2022
+# This file was automatically generated on Sat Sep  9 19:03:28 2023
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -439,6 +439,33 @@ test-suite "BOOST_NO_CXX20_HDR_SYNCSTREAM" :
 test-suite "BOOST_NO_CXX20_HDR_VERSION" : 
 [ run ../no_cxx20_hdr_version_pass.cpp ]
 [ compile-fail ../no_cxx20_hdr_version_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_EXPECTED" : 
+[ run ../no_cxx23_hdr_expected_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_expected_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_FLAT_MAP" : 
+[ run ../no_cxx23_hdr_flat_map_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_flat_map_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_FLAT_SET" : 
+[ run ../no_cxx23_hdr_flat_set_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_flat_set_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_GENERATOR" : 
+[ run ../no_cxx23_hdr_generator_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_generator_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_MDSPAN" : 
+[ run ../no_cxx23_hdr_mdspan_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_mdspan_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_PRINT" : 
+[ run ../no_cxx23_hdr_print_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_print_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_SPANSTREAM" : 
+[ run ../no_cxx23_hdr_spanstream_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_spanstream_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_STACKTRACE" : 
+[ run ../no_cxx23_hdr_stacktrace_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_stacktrace_fail.cpp ] ;
+test-suite "BOOST_NO_CXX23_HDR_STDFLOAT" : 
+[ run ../no_cxx23_hdr_stdfloat_pass.cpp ]
+[ compile-fail ../no_cxx23_hdr_stdfloat_fail.cpp ] ;
 test-suite "BOOST_NO_CXX98_BINDERS" : 
 [ run ../no_cxx98_binders_pass.cpp ]
 [ compile-fail ../no_cxx98_binders_fail.cpp ] ;

test/boost_no_cxx23_hdr_expected.ipp

@@ -0,0 +1,28 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_EXPECTED
+//  TITLE:         C++23 header <expected> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <expected>
+
+#include <expected>
+
+namespace boost_no_cxx23_hdr_expected {
+
+int test()
+{
+  using std::unexpected;
+  using std::bad_expected_access;
+  using std::unexpect_t;
+  using std::unexpect;
+  using std::expected;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_flat_map.ipp

@@ -0,0 +1,31 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_FLAT_MAP
+//  TITLE:         C++23 header <flat_map> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <flat_map>
+
+#include <flat_map>
+
+namespace boost_no_cxx23_hdr_flat_map {
+
+int test()
+{
+  using std::flat_map;
+  using std::sorted_unique_t;
+  using std::sorted_unique;
+  using std::erase_if;
+  using std::uses_allocator;
+  using std::flat_multimap;
+  using std::sorted_equivalent_t;
+  using std::sorted_equivalent;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_flat_set.ipp

@@ -0,0 +1,31 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_FLAT_SET
+//  TITLE:         C++23 header <flat_set> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <flat_set>
+
+#include <flat_set>
+
+namespace boost_no_cxx23_hdr_flat_set {
+
+int test()
+{
+  using std::flat_set;
+  using std::sorted_unique_t;
+  using std::sorted_unique;
+  using std::erase_if;
+  using std::uses_allocator;
+  using std::flat_multiset;
+  using std::sorted_equivalent_t;
+  using std::sorted_equivalent;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_generator.ipp

@@ -0,0 +1,24 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_GENERATOR
+//  TITLE:         C++23 header <generator> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <generator>
+
+#include <generator>
+
+namespace boost_no_cxx23_hdr_generator {
+
+int test()
+{
+  using std::generator;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_mdspan.ipp

@@ -0,0 +1,30 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_MDSPAN
+//  TITLE:         C++23 header <mdspan> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <mdspan>
+
+#include <mdspan>
+
+namespace boost_no_cxx23_hdr_mdspan {
+
+int test()
+{
+  using std::extents;
+  using std::dextents;
+  using std::layout_left;
+  using std::layout_right;
+  using std::layout_stride;
+  using std::default_accessor;
+  using std::mdspan;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_print.ipp

@@ -0,0 +1,27 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_PRINT
+//  TITLE:         C++23 header <print> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <print>
+
+#include <print>
+
+namespace boost_no_cxx23_hdr_print {
+
+int test()
+{
+  using std::print;
+  using std::println;
+  using std::vprint_unicode;
+  using std::vprint_nonunicode;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_spanstream.ipp

@@ -0,0 +1,36 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_SPANSTREAM
+//  TITLE:         C++23 header <spanstream> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <spanstream>
+
+#include <spanstream>
+
+namespace boost_no_cxx23_hdr_spanstream {
+
+int test()
+{
+  using std::basic_spanbuf;
+  using std::spanbuf;
+  using std::wspanbuf;
+  using std::basic_ispanstream;
+  using std::ispanstream;
+  using std::wispanstream;
+  using std::basic_ospanstream;
+  using std::basic_ospanstream;
+  using std::ospanstream;
+  using std::wospanstream;
+  using std::basic_spanstream;
+  using std::spanstream;
+  using std::wspanstream;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_stacktrace.ipp

@@ -0,0 +1,26 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_STACKTRACE
+//  TITLE:         C++23 header <stacktrace> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <stacktrace>
+
+#include <stacktrace>
+
+namespace boost_no_cxx23_hdr_stacktrace {
+
+int test()
+{
+  using std::stacktrace_entry;
+  using std::basic_stacktrace;
+  using std::stacktrace;
+
+  return 0;
+}
+
+}

test/boost_no_cxx23_hdr_stdfloat.ipp

@@ -0,0 +1,37 @@
+//  (C) Copyright John Maddock 2023
+
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for more information.
+
+//  MACRO:         BOOST_NO_CXX23_HDR_STDFLOAT
+//  TITLE:         C++23 header <stdfloat> unavailable
+//  DESCRIPTION:   The standard library does not supply C++23 header <stdfloat>
+
+#include <stdfloat>
+
+namespace boost_no_cxx23_hdr_stdfloat {
+
+int test()
+{
+#if defined(__STDCPP_FLOAT16_T__)
+   using std::float16_t;
+#endif
+#if defined(__STDCPP_FLOAT32_T__)
+   using std::float32_t;
+#endif
+#if defined(__STDCPP_FLOAT64_T__)
+   using std::float64_t;
+#endif
+#if defined(__STDCPP_FLOAT128_T__)
+   using std::float128_t;
+#endif
+#if defined(__STDCPP_BFLOAT16_T__)
+   using std::bfloat16_t;
+#endif  
+   return 0;
+}
+
+}

test/config_info.cpp

@@ -1199,6 +1199,15 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_CXX20_HDR_STOP_TOKEN);
    PRINT_MACRO(BOOST_NO_CXX20_HDR_SYNCSTREAM);
    PRINT_MACRO(BOOST_NO_CXX20_HDR_VERSION);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_EXPECTED);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_FLAT_MAP);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_FLAT_SET);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_GENERATOR);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_MDSPAN);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_PRINT);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_SPANSTREAM);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_STACKTRACE);
+   PRINT_MACRO(BOOST_NO_CXX23_HDR_STDFLOAT);
    PRINT_MACRO(BOOST_NO_CXX98_BINDERS);
    PRINT_MACRO(BOOST_NO_CXX98_FUNCTION_BASE);
    PRINT_MACRO(BOOST_NO_CXX98_RANDOM_SHUFFLE);
@@ -1269,6 +1278,14 @@ void print_boost_macros()
 
 
 
+
+
+
+
+
+
+
+
    // END GENERATED BLOCK
 
    PRINT_MACRO(BOOST_CXX_VERSION);
@@ -1359,9 +1376,13 @@ void print_sd6_macros()
     PRINT_MACRO(__cpp_lib_erase_if);
     PRINT_MACRO(__cpp_lib_exchange_function);
     PRINT_MACRO(__cpp_lib_execution);
+    PRINT_MACRO(__cpp_lib_expected);
     PRINT_MACRO(__cpp_lib_filesystem);
+    PRINT_MACRO(__cpp_lib_flat_map);
+    PRINT_MACRO(__cpp_lib_flat_set);
     PRINT_MACRO(__cpp_lib_format);
     PRINT_MACRO(__cpp_lib_gcd_lcm);
+    PRINT_MACRO(__cpp_lib_generator);
     PRINT_MACRO(__cpp_lib_generic_associative_lookup);
     PRINT_MACRO(__cpp_lib_generic_unordered_lookup);
     PRINT_MACRO(__cpp_lib_hardware_interference_size);
@@ -1394,6 +1415,7 @@ void print_sd6_macros()
     PRINT_MACRO(__cpp_lib_map_try_emplace);
     PRINT_MACRO(__cpp_lib_math_constants);
     PRINT_MACRO(__cpp_lib_math_special_functions);
+    PRINT_MACRO(__cpp_lib_mdspan);
     PRINT_MACRO(__cpp_lib_memory_resource);
     PRINT_MACRO(__cpp_lib_node_extract);
     PRINT_MACRO(__cpp_lib_nonmember_container_access);
@@ -1402,6 +1424,7 @@ void print_sd6_macros()
     PRINT_MACRO(__cpp_lib_optional);
     PRINT_MACRO(__cpp_lib_parallel_algorithm);
     PRINT_MACRO(__cpp_lib_polymorphic_allocator);
+    PRINT_MACRO(__cpp_lib_print);
     PRINT_MACRO(__cpp_lib_quoted_string_io);
     PRINT_MACRO(__cpp_lib_ranges);
     PRINT_MACRO(__cpp_lib_raw_memory_algorithms);
@@ -1419,7 +1442,9 @@ void print_sd6_macros()
     PRINT_MACRO(__cpp_lib_smart_ptr_for_overwrite);
     PRINT_MACRO(__cpp_lib_source_location);
     PRINT_MACRO(__cpp_lib_span);
+    PRINT_MACRO(__cpp_lib_spanstream);
     PRINT_MACRO(__cpp_lib_ssize);
+    PRINT_MACRO(__cpp_lib_stacktrace);
     PRINT_MACRO(__cpp_lib_starts_ends_with);
     PRINT_MACRO(__cpp_lib_string_udls);
     PRINT_MACRO(__cpp_lib_string_view);

test/config_test.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jun  5 16:50:18 2022
+//  This file was automatically generated on Sat Sep  9 19:03:28 2023
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-21.
 //  Use, modification and distribution are subject to the 
@@ -532,6 +532,51 @@ namespace boost_no_cxx20_hdr_syncstream = empty_boost;
 #else
 namespace boost_no_cxx20_hdr_version = empty_boost;
 #endif
+#ifndef BOOST_NO_CXX23_HDR_EXPECTED
+#include "boost_no_cxx23_hdr_expected.ipp"
+#else
+namespace boost_no_cxx23_hdr_expected = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_FLAT_MAP
+#include "boost_no_cxx23_hdr_flat_map.ipp"
+#else
+namespace boost_no_cxx23_hdr_flat_map = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_FLAT_SET
+#include "boost_no_cxx23_hdr_flat_set.ipp"
+#else
+namespace boost_no_cxx23_hdr_flat_set = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_GENERATOR
+#include "boost_no_cxx23_hdr_generator.ipp"
+#else
+namespace boost_no_cxx23_hdr_generator = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_MDSPAN
+#include "boost_no_cxx23_hdr_mdspan.ipp"
+#else
+namespace boost_no_cxx23_hdr_mdspan = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_PRINT
+#include "boost_no_cxx23_hdr_print.ipp"
+#else
+namespace boost_no_cxx23_hdr_print = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_SPANSTREAM
+#include "boost_no_cxx23_hdr_spanstream.ipp"
+#else
+namespace boost_no_cxx23_hdr_spanstream = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_STACKTRACE
+#include "boost_no_cxx23_hdr_stacktrace.ipp"
+#else
+namespace boost_no_cxx23_hdr_stacktrace = empty_boost;
+#endif
+#ifndef BOOST_NO_CXX23_HDR_STDFLOAT
+#include "boost_no_cxx23_hdr_stdfloat.ipp"
+#else
+namespace boost_no_cxx23_hdr_stdfloat = empty_boost;
+#endif
 #ifndef BOOST_NO_CXX98_BINDERS
 #include "boost_no_cxx98_binders.ipp"
 #else
@@ -1851,6 +1896,51 @@ int main( int, char *[] )
       std::cerr << "Failed test for BOOST_NO_CXX20_HDR_VERSION at: " << __FILE__ << ":" << __LINE__ << std::endl;
       ++error_count;
    }
+   if(0 != boost_no_cxx23_hdr_expected::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_EXPECTED at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_flat_map::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_FLAT_MAP at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_flat_set::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_FLAT_SET at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_generator::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_GENERATOR at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_mdspan::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_MDSPAN at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_print::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_PRINT at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_spanstream::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_SPANSTREAM at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_stacktrace::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_STACKTRACE at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
+   if(0 != boost_no_cxx23_hdr_stdfloat::test())
+   {
+      std::cerr << "Failed test for BOOST_NO_CXX23_HDR_STDFLOAT at: " << __FILE__ << ":" << __LINE__ << std::endl;
+      ++error_count;
+   }
    if(0 != boost_no_cxx98_binders::test())
    {
       std::cerr << "Failed test for BOOST_NO_CXX98_BINDERS at: " << __FILE__ << ":" << __LINE__ << std::endl;

test/no_cxx23_hdr_expected_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 17:21:24 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_EXPECTED
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_EXPECTED should not be defined.
+// See file boost_no_cxx23_hdr_expected.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_EXPECTED
+#include "boost_no_cxx23_hdr_expected.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_expected::test();
+}
+

test/no_cxx23_hdr_expected_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 17:21:24 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_EXPECTED
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_EXPECTED should be defined.
+// See file boost_no_cxx23_hdr_expected.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_EXPECTED
+#include "boost_no_cxx23_hdr_expected.ipp"
+#else
+namespace boost_no_cxx23_hdr_expected = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_expected::test();
+}
+

test/no_cxx23_hdr_flat_map_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 17:21:24 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_FLAT_MAP
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_FLAT_MAP should not be defined.
+// See file boost_no_cxx23_hdr_flat_map.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_FLAT_MAP
+#include "boost_no_cxx23_hdr_flat_map.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_flat_map::test();
+}
+

test/no_cxx23_hdr_flat_map_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 17:21:24 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_FLAT_MAP
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_FLAT_MAP should be defined.
+// See file boost_no_cxx23_hdr_flat_map.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_FLAT_MAP
+#include "boost_no_cxx23_hdr_flat_map.ipp"
+#else
+namespace boost_no_cxx23_hdr_flat_map = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_flat_map::test();
+}
+

test/no_cxx23_hdr_flat_set_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:28:37 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_FLAT_SET
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_FLAT_SET should not be defined.
+// See file boost_no_cxx23_hdr_flat_set.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_FLAT_SET
+#include "boost_no_cxx23_hdr_flat_set.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_flat_set::test();
+}
+

test/no_cxx23_hdr_flat_set_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:28:37 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_FLAT_SET
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_FLAT_SET should be defined.
+// See file boost_no_cxx23_hdr_flat_set.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_FLAT_SET
+#include "boost_no_cxx23_hdr_flat_set.ipp"
+#else
+namespace boost_no_cxx23_hdr_flat_set = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_flat_set::test();
+}
+

test/no_cxx23_hdr_generator_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:32:43 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_GENERATOR
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_GENERATOR should not be defined.
+// See file boost_no_cxx23_hdr_generator.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_GENERATOR
+#include "boost_no_cxx23_hdr_generator.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_generator::test();
+}
+

test/no_cxx23_hdr_generator_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:32:43 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_GENERATOR
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_GENERATOR should be defined.
+// See file boost_no_cxx23_hdr_generator.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_GENERATOR
+#include "boost_no_cxx23_hdr_generator.ipp"
+#else
+namespace boost_no_cxx23_hdr_generator = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_generator::test();
+}
+

test/no_cxx23_hdr_mdspan_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:36:44 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_MDSPAN
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_MDSPAN should not be defined.
+// See file boost_no_cxx23_hdr_mdspan.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_MDSPAN
+#include "boost_no_cxx23_hdr_mdspan.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_mdspan::test();
+}
+

test/no_cxx23_hdr_mdspan_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:36:44 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_MDSPAN
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_MDSPAN should be defined.
+// See file boost_no_cxx23_hdr_mdspan.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_MDSPAN
+#include "boost_no_cxx23_hdr_mdspan.ipp"
+#else
+namespace boost_no_cxx23_hdr_mdspan = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_mdspan::test();
+}
+

test/no_cxx23_hdr_print_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:46:50 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_PRINT
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_PRINT should not be defined.
+// See file boost_no_cxx23_hdr_print.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_PRINT
+#include "boost_no_cxx23_hdr_print.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_print::test();
+}
+

test/no_cxx23_hdr_print_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:46:50 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_PRINT
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_PRINT should be defined.
+// See file boost_no_cxx23_hdr_print.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_PRINT
+#include "boost_no_cxx23_hdr_print.ipp"
+#else
+namespace boost_no_cxx23_hdr_print = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_print::test();
+}
+

test/no_cxx23_hdr_spanstream_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:54:45 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_SPANSTREAM
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_SPANSTREAM should not be defined.
+// See file boost_no_cxx23_hdr_spanstream.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_SPANSTREAM
+#include "boost_no_cxx23_hdr_spanstream.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_spanstream::test();
+}
+

test/no_cxx23_hdr_spanstream_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:54:45 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_SPANSTREAM
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_SPANSTREAM should be defined.
+// See file boost_no_cxx23_hdr_spanstream.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_SPANSTREAM
+#include "boost_no_cxx23_hdr_spanstream.ipp"
+#else
+namespace boost_no_cxx23_hdr_spanstream = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_spanstream::test();
+}
+

test/no_cxx23_hdr_stacktrace_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:59:13 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_STACKTRACE
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_STACKTRACE should not be defined.
+// See file boost_no_cxx23_hdr_stacktrace.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_STACKTRACE
+#include "boost_no_cxx23_hdr_stacktrace.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_stacktrace::test();
+}
+

test/no_cxx23_hdr_stacktrace_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 18:59:13 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_STACKTRACE
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_STACKTRACE should be defined.
+// See file boost_no_cxx23_hdr_stacktrace.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_STACKTRACE
+#include "boost_no_cxx23_hdr_stacktrace.ipp"
+#else
+namespace boost_no_cxx23_hdr_stacktrace = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_stacktrace::test();
+}
+

test/no_cxx23_hdr_stdfloat_fail.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 19:03:28 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_STDFLOAT
+// This file should not compile, if it does then
+// BOOST_NO_CXX23_HDR_STDFLOAT should not be defined.
+// See file boost_no_cxx23_hdr_stdfloat.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifdef BOOST_NO_CXX23_HDR_STDFLOAT
+#include "boost_no_cxx23_hdr_stdfloat.ipp"
+#else
+#error "this file should not compile"
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_stdfloat::test();
+}
+

test/no_cxx23_hdr_stdfloat_pass.cpp

@@ -0,0 +1,37 @@
+//  This file was automatically generated on Sat Sep  9 19:03:28 2023
+//  by libs/config/tools/generate.cpp
+//  Copyright John Maddock 2002-21.
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org/libs/config for the most recent version.//
+//  Revision $Id$
+//
+
+
+// Test file for macro BOOST_NO_CXX23_HDR_STDFLOAT
+// This file should compile, if it does not then
+// BOOST_NO_CXX23_HDR_STDFLOAT should be defined.
+// See file boost_no_cxx23_hdr_stdfloat.ipp for details
+
+// Must not have BOOST_ASSERT_CONFIG set; it defeats
+// the objective of this file:
+#ifdef BOOST_ASSERT_CONFIG
+#  undef BOOST_ASSERT_CONFIG
+#endif
+
+#include <boost/config.hpp>
+#include "test.hpp"
+
+#ifndef BOOST_NO_CXX23_HDR_STDFLOAT
+#include "boost_no_cxx23_hdr_stdfloat.ipp"
+#else
+namespace boost_no_cxx23_hdr_stdfloat = empty_boost;
+#endif
+
+int main( int, char *[] )
+{
+   return boost_no_cxx23_hdr_stdfloat::test();
+}
+