What is the longest name in C++?

Question:
What is the longest identifier in C++20 Standard Library?

Answer:
https://github.com/yohhoy/cpp-longest-identifier

identifier	len	since
atomic_compare_exchange_strong_explicit	39	C++11
hardware_constructive_interference_size	39	C++17
get_return_object_on_allocation_failure	39	C++20
uninitialized_construct_using_allocator	39	C++20
propagate_on_container_copy_assignment	38	C++11
propagate_on_container_move_assignment	38	C++11
hardware_destructive_interference_size	38	C++17
is_pointer_interconvertible_with_class	38	C++20
atomic_compare_exchange_weak_explicit	37	C++11
select_on_container_copy_construction	37	C++11
is_pointer_interconvertible_base_of_v	37	C++20
is_trivially_default_constructible_v	36	C++17
has_unique_object_representations_v	35	C++17
is_pointer_interconvertible_base_of	35	C++20
inappropriate_io_control_operation	34	C++11
is_trivially_default_constructible	34	C++11
is_nothrow_default_constructible_v	34	C++17
indirectly_regular_unary_invocable	34	C++20
atomic_flag_test_and_set_explicit	33	C++11
has_unique_object_representations	33	C++17
is_trivially_copy_constructible_v	33	C++17
is_trivially_move_constructible_v	33	C++17
uninitialized_default_construct_n	33	C++17
lexicographical_compare_three_way	33	C++20
is_nothrow_default_constructible	32	C++11
uses_allocator_construction_args	32	C++20