Begin C++20 support.

checks/Jamfile.v2

@@ -1,6 +1,6 @@
 #
 # *** DO NOT EDIT THIS FILE BY HAND ***
-# This file was automatically generated on Sun Jul 26 20:34:45 2020
+# This file was automatically generated on Thu Mar  4 18:30:31 2021
 #  by libs/config/tools/generate.cpp
 # Copyright John Maddock.
 # Use, modification and distribution are subject to the 
@@ -129,6 +129,20 @@ obj cxx17_iterator_traits : test_case.cpp : <define>TEST_BOOST_NO_CXX17_ITERATOR
 obj cxx17_std_apply : test_case.cpp : <define>TEST_BOOST_NO_CXX17_STD_APPLY ;
 obj cxx17_std_invoke : test_case.cpp : <define>TEST_BOOST_NO_CXX17_STD_INVOKE ;
 obj cxx17_structured_bindings : test_case.cpp : <define>TEST_BOOST_NO_CXX17_STRUCTURED_BINDINGS ;
+obj cxx20_hdr_barrier : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_BARRIER ;
+obj cxx20_hdr_bit : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_BIT ;
+obj cxx20_hdr_compare : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_COMPARE ;
+obj cxx20_hdr_concepts : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_CONCEPTS ;
+obj cxx20_hdr_coroutine : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_COROUTINE ;
+obj cxx20_hdr_format : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_FORMAT ;
+obj cxx20_hdr_latch : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_LATCH ;
+obj cxx20_hdr_numbers : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_NUMBERS ;
+obj cxx20_hdr_ranges : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_RANGES ;
+obj cxx20_hdr_semaphore : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_SEMAPHORE ;
+obj cxx20_hdr_source_location : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_SOURCE_LOCATION ;
+obj cxx20_hdr_span : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_SPAN ;
+obj cxx20_hdr_stop_token : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_STOP_TOKEN ;
+obj cxx20_hdr_syncstream : test_case.cpp : <define>TEST_BOOST_NO_CXX20_HDR_SYNCSTREAM ;
 obj cxx98_binders : test_case.cpp : <define>TEST_BOOST_NO_CXX98_BINDERS ;
 obj cxx98_function_base : test_case.cpp : <define>TEST_BOOST_NO_CXX98_FUNCTION_BASE ;
 obj cxx98_random_shuffle : test_case.cpp : <define>TEST_BOOST_NO_CXX98_RANDOM_SHUFFLE ;

checks/std/cpp_aggregate_bases_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_aggregate_nsdmi_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_alias_templates_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_aligned_new_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_attributes_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_binary_literals_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_capture_star_this_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_char8_t_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_conditional_explicit_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_constexpr_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_constexpr_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_constexpr_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_decltype_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_decltype_auto_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_deduction_guides_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_delegating_constructors_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_enumerator_attributes_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_exceptions_03.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_explicit_conversion_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_fold_expressions_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_generic_lambdas_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_guaranteed_copy_elision_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_hex_float_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_if_constexpr_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_impl_destroying_delete_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_impl_three_way_comparison_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_inheriting_constructors_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_inheriting_constructors_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_init_captures_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_initializer_lists_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_inline_variables_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lambdas_11.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_addressof_constexpr_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_allocator_traits_is_always_equal_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_any_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_apply_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_array_constexpr_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_as_const_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_atomic_is_always_lock_free_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_atomic_ref_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_bind_front_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_bit_cast_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_bool_constant_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_boyer_moore_searcher_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_byte_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_char8_t_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_chrono_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_chrono_udls_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_clamp_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_complex_udls_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_concepts_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_constexpr_misc_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_constexpr_swap_algorithms_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_destroying_delete_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_enable_shared_from_this_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_erase_if_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_exchange_function_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_execution_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_filesystem_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_gcd_lcm_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_generic_associative_lookup_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_generic_unordered_lookup_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_hardware_interference_size_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_has_unique_object_representations_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_hypot_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_incomplete_container_elements_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_integer_sequence_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_integral_constant_callable_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_invoke_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_aggregate_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_constant_evaluated_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_final_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_invocable_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_null_pointer_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_is_swappable_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_launder_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_list_remove_return_type_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_logical_traits_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_make_from_tuple_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_make_reverse_iterator_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_make_unique_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_map_try_emplace_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_math_special_functions_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_memory_resource_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_node_extract_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_nonmember_container_access_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_not_fn_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_null_iterators_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_optional_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_parallel_algorithm_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_quoted_string_io_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_ranges_20.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_raw_memory_algorithms_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_result_of_sfinae_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_robust_nonmodifying_seq_ops_14.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:31 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_sample_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_scoped_lock_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_shared_mutex_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the 

checks/std/cpp_lib_shared_ptr_arrays_17.cpp

@@ -1,4 +1,4 @@
-//  This file was automatically generated on Sun Jul 26 20:34:45 2020
+//  This file was automatically generated on Thu Mar  4 18:30:30 2021
 //  by libs/config/tools/generate.cpp
 //  Copyright John Maddock 2002-4.
 //  Use, modification and distribution are subject to the