17 Language support library [support]

17.3 Implementation properties [support.limits]

17.3.2 Header <version> synopsis [version.syn]

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The header <version> supplies implementation-dependent information about the C++ standard library (e.g., version number and release date).
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Each of the macros defined in <version> is also defined after inclusion of any member of the set of library headers indicated in the corresponding comment in this synopsis.
[Note 1: 
Future revisions of C++ might replace the values of these macros with greater values.
— end note]
#define __cpp_lib_adaptor_iterator_pair_constructor 202106L // also in <stack>, <queue> #define __cpp_lib_addressof_constexpr 201603L // freestanding, also in <memory> #define __cpp_lib_algorithm_iterator_requirements 202207L // also in <algorithm>, <numeric>, <memory> #define __cpp_lib_allocate_at_least 202302L // also in <memory> #define __cpp_lib_allocator_traits_is_always_equal 201411L // freestanding, also in <memory>, <scoped_allocator>, <string>, <deque>, <forward_list>, <list>, // <vector>, <map>, <set>, <unordered_map>, <unordered_set> #define __cpp_lib_any 201606L // also in <any> #define __cpp_lib_apply 201603L // freestanding, also in <tuple> #define __cpp_lib_array_constexpr 201811L // also in <iterator>, <array> #define __cpp_lib_as_const 201510L // freestanding, also in <utility> #define __cpp_lib_associative_heterogeneous_erasure 202110L // also in <map>, <set>, <unordered_map>, <unordered_set> #define __cpp_lib_associative_heterogeneous_insertion 202306L // also in <map>, <set>, <unordered_map>, <unordered_set> #define __cpp_lib_assume_aligned 201811L // freestanding, also in <memory> #define __cpp_lib_atomic_flag_test 201907L // freestanding, also in <atomic> #define __cpp_lib_atomic_float 201711L // freestanding, also in <atomic> #define __cpp_lib_atomic_is_always_lock_free 201603L // freestanding, also in <atomic> #define __cpp_lib_atomic_lock_free_type_aliases 201907L // also in <atomic> #define __cpp_lib_atomic_ref 201806L // freestanding, also in <atomic> #define __cpp_lib_atomic_shared_ptr 201711L // also in <memory> #define __cpp_lib_atomic_value_initialization 201911L // freestanding, also in <atomic>, <memory> #define __cpp_lib_atomic_wait 201907L // freestanding, also in <atomic> #define __cpp_lib_barrier 202302L // also in <barrier> #define __cpp_lib_bind_back 202306L // freestanding, also in <functional> #define __cpp_lib_bind_front 202306L // freestanding, also in <functional> #define __cpp_lib_bit_cast 201806L // freestanding, also in <bit> #define __cpp_lib_bitops 201907L // freestanding, also in <bit> #define __cpp_lib_bitset 202306L // also in <bitset> #define __cpp_lib_bool_constant 201505L // freestanding, also in <type_traits> #define __cpp_lib_bounded_array_traits 201902L // freestanding, also in <type_traits> #define __cpp_lib_boyer_moore_searcher 201603L // also in <functional> #define __cpp_lib_byte 201603L // freestanding, also in <cstddef> #define __cpp_lib_byteswap 202110L // freestanding, also in <bit> #define __cpp_lib_char8_t 201907L // freestanding, also in <atomic>, <filesystem>, <istream>, <limits>, <locale>, <ostream>, <string>, // <string_view> #define __cpp_lib_chrono 202306L // also in <chrono> #define __cpp_lib_chrono_udls 201304L // also in <chrono> #define __cpp_lib_clamp 201603L // also in <algorithm> #define __cpp_lib_common_reference 202302L // also in <type_traits> #define __cpp_lib_common_reference_wrapper 202302L // also in <functional> #define __cpp_lib_complex_udls 201309L // also in <complex> #define __cpp_lib_concepts 202207L // freestanding, also in <concepts>, <compare> #define __cpp_lib_constexpr_algorithms 202306L // also in <algorithm>, <utility> #define __cpp_lib_constexpr_bitset 202207L // also in <bitset> #define __cpp_lib_constexpr_charconv 202207L // also in <charconv> #define __cpp_lib_constexpr_cmath 202306L // also in <cmath>, <cstdlib> #define __cpp_lib_constexpr_complex 202306L // also in <complex> #define __cpp_lib_constexpr_dynamic_alloc 201907L // also in <memory> #define __cpp_lib_constexpr_functional 201907L // freestanding, also in <functional> #define __cpp_lib_constexpr_iterator 201811L // freestanding, also in <iterator> #define __cpp_lib_constexpr_memory 202202L // freestanding, also in <memory> #define __cpp_lib_constexpr_numeric 201911L // also in <numeric> #define __cpp_lib_constexpr_string 201907L // also in <string> #define __cpp_lib_constexpr_string_view 201811L // also in <string_view> #define __cpp_lib_constexpr_tuple 201811L // freestanding, also in <tuple> #define __cpp_lib_constexpr_typeinfo 202106L // freestanding, also in <typeinfo> #define __cpp_lib_constexpr_utility 201811L // freestanding, also in <utility> #define __cpp_lib_constexpr_vector 201907L // also in <vector> #define __cpp_lib_containers_ranges 202202L // also in <vector>, <list>, <forward_list>, <map>, <set>, <unordered_map>, <unordered_set>, // <deque>, <queue>, <stack>, <string> #define __cpp_lib_copyable_function 202306L // also in <functional> #define __cpp_lib_coroutine 201902L // also in <coroutine> #define __cpp_lib_debugging 202311L // freestanding, also in <debugging> #define __cpp_lib_destroying_delete 201806L // freestanding, also in <new> #define __cpp_lib_enable_shared_from_this 201603L // also in <memory> #define __cpp_lib_endian 201907L // freestanding, also in <bit> #define __cpp_lib_erase_if 202002L // also in <string>, <deque>, <forward_list>, <list>, <vector>, <map>, <set>, <unordered_map>, // <unordered_set> #define __cpp_lib_exchange_function 201304L // freestanding, also in <utility> #define __cpp_lib_execution 201902L // also in <execution> #define __cpp_lib_expected 202211L // also in <expected> #define __cpp_lib_filesystem 201703L // also in <filesystem> #define __cpp_lib_flat_map 202207L // also in <flat_map> #define __cpp_lib_flat_set 202207L // also in <flat_set> #define __cpp_lib_format 202311L // also in <format> #define __cpp_lib_format_ranges 202207L // also in <format> #define __cpp_lib_format_uchar 202311L // also in <format> #define __cpp_lib_formatters 202302L // also in <stacktrace>, <thread> #define __cpp_lib_forward_like 202207L // freestanding, also in <utility> #define __cpp_lib_freestanding_algorithm 202311L // freestanding, also in <algorithm> #define __cpp_lib_freestanding_array 202311L // freestanding, also in <array> #define __cpp_lib_freestanding_char_traits 202306L // freestanding, also in <string> #define __cpp_lib_freestanding_charconv 202306L // freestanding, also in <charconv> #define __cpp_lib_freestanding_cstdlib 202306L // freestanding, also in <cstdlib>, <cmath> #define __cpp_lib_freestanding_cstring 202311L // freestanding, also in <cstring> #define __cpp_lib_freestanding_cwchar 202306L // freestanding, also in <cwchar> #define __cpp_lib_freestanding_errc 202306L // freestanding, also in <cerrno>, <system_error> #define __cpp_lib_freestanding_expected 202311L // freestanding, also in <expected> #define __cpp_lib_freestanding_feature_test_macros 202306L // freestanding #define __cpp_lib_freestanding_functional 202306L // freestanding, also in <functional> #define __cpp_lib_freestanding_iterator 202306L // freestanding, also in <iterator> #define __cpp_lib_freestanding_mdspan 202311L // freestanding, also in <mdspan> #define __cpp_lib_freestanding_memory 202306L // freestanding, also in <memory> #define __cpp_lib_freestanding_numeric 202311L // freestanding, also in <numeric> #define __cpp_lib_freestanding_operator_new see below // freestanding, also in <new> #define __cpp_lib_freestanding_optional 202311L // freestanding, also in <optional> #define __cpp_lib_freestanding_ranges 202306L // freestanding, also in <ranges> #define __cpp_lib_freestanding_ratio 202306L // freestanding, also in <ratio> #define __cpp_lib_freestanding_string_view 202311L // freestanding, also in <string_view> #define __cpp_lib_freestanding_tuple 202306L // freestanding, also in <tuple> #define __cpp_lib_freestanding_utility 202306L // freestanding, also in <utility> #define __cpp_lib_freestanding_variant 202311L // freestanding, also in <variant> #define __cpp_lib_fstream_native_handle 202306L // also in <fstream> #define __cpp_lib_function_ref 202306L // also in <functional> #define __cpp_lib_gcd_lcm 201606L // also in <numeric> #define __cpp_lib_generator 202207L // also in <generator> #define __cpp_lib_generic_associative_lookup 201304L // also in <map>, <set> #define __cpp_lib_generic_unordered_lookup 201811L // also in <unordered_map>, <unordered_set> #define __cpp_lib_hardware_interference_size 201703L // freestanding, also in <new> #define __cpp_lib_has_unique_object_representations 201606L // freestanding, also in <type_traits> #define __cpp_lib_hazard_pointer 202306L // also in <hazard_pointer> #define __cpp_lib_hypot 201603L // also in <cmath> #define __cpp_lib_incomplete_container_elements 201505L // also in <forward_list>, <list>, <vector> #define __cpp_lib_int_pow2 202002L // freestanding, also in <bit> #define __cpp_lib_integer_comparison_functions 202002L // also in <utility> #define __cpp_lib_integer_sequence 201304L // freestanding, also in <utility> #define __cpp_lib_integral_constant_callable 201304L // freestanding, also in <type_traits> #define __cpp_lib_interpolate 201902L // also in <cmath>, <numeric> #define __cpp_lib_invoke 201411L // freestanding, also in <functional> #define __cpp_lib_invoke_r 202106L // freestanding, also in <functional> #define __cpp_lib_ios_noreplace 202207L // also in <ios> #define __cpp_lib_is_aggregate 201703L // freestanding, also in <type_traits> #define __cpp_lib_is_constant_evaluated 201811L // freestanding, also in <type_traits> #define __cpp_lib_is_final 201402L // freestanding, also in <type_traits> #define __cpp_lib_is_implicit_lifetime 202302L // also in <type_traits> #define __cpp_lib_is_invocable 201703L // freestanding, also in <type_traits> #define __cpp_lib_is_layout_compatible 201907L // freestanding, also in <type_traits> #define __cpp_lib_is_nothrow_convertible 201806L // freestanding, also in <type_traits> #define __cpp_lib_is_null_pointer 201309L // freestanding, also in <type_traits> #define __cpp_lib_is_pointer_interconvertible 201907L // freestanding, also in <type_traits> #define __cpp_lib_is_scoped_enum 202011L // freestanding, also in <type_traits> #define __cpp_lib_is_swappable 201603L // freestanding, also in <type_traits> #define __cpp_lib_is_within_lifetime 202306L // also in <type_traits> #define __cpp_lib_jthread 201911L // also in <stop_token>, <thread> #define __cpp_lib_latch 201907L // also in <latch> #define __cpp_lib_launder 201606L // freestanding, also in <new> #define __cpp_lib_linalg 202311L // also in <linalg> #define __cpp_lib_list_remove_return_type 201806L // also in <forward_list>, <list> #define __cpp_lib_logical_traits 201510L // freestanding, also in <type_traits> #define __cpp_lib_make_from_tuple 201606L // freestanding, also in <tuple> #define __cpp_lib_make_reverse_iterator 201402L // freestanding, also in <iterator> #define __cpp_lib_make_unique 201304L // also in <memory> #define __cpp_lib_map_try_emplace 201411L // also in <map> #define __cpp_lib_math_constants 201907L // also in <numbers> #define __cpp_lib_math_special_functions 201603L // also in <cmath> #define __cpp_lib_mdspan 202207L // also in <mdspan> #define __cpp_lib_memory_resource 201603L // also in <memory_resource> #define __cpp_lib_modules 202207L // freestanding #define __cpp_lib_move_iterator_concept 202207L // freestanding, also in <iterator> #define __cpp_lib_move_only_function 202110L // also in <functional> #define __cpp_lib_node_extract 201606L // also in <map>, <set>, <unordered_map>, <unordered_set> #define __cpp_lib_nonmember_container_access 201411L // freestanding, also in <array>, <deque>, <forward_list>, <iterator>, <list>, <map>, <regex>, <set>, // <string>, <unordered_map>, <unordered_set>, <vector> #define __cpp_lib_not_fn 202306L // freestanding, also in <functional> #define __cpp_lib_null_iterators 201304L // freestanding, also in <iterator> #define __cpp_lib_optional 202110L // also in <optional> #define __cpp_lib_out_ptr 202311L // freestanding, also in <memory> #define __cpp_lib_parallel_algorithm 201603L // also in <algorithm>, <numeric> #define __cpp_lib_polymorphic_allocator 201902L // also in <memory_resource> #define __cpp_lib_print 202207L // also in <print>, <ostream> #define __cpp_lib_quoted_string_io 201304L // also in <iomanip> #define __cpp_lib_ranges 202302L // also in <algorithm>, <functional>, <iterator>, <memory>, <ranges> #define __cpp_lib_ranges_as_const 202311L // freestanding, also in <ranges> #define __cpp_lib_ranges_as_rvalue 202207L // freestanding, also in <ranges> #define __cpp_lib_ranges_cartesian_product 202207L // freestanding, also in <ranges> #define __cpp_lib_ranges_chunk 202202L // freestanding, also in <ranges> #define __cpp_lib_ranges_chunk_by 202202L // freestanding, also in <ranges> #define __cpp_lib_ranges_contains 202207L // also in <algorithm> #define __cpp_lib_ranges_enumerate 202302L // also in <ranges>, <version> #define __cpp_lib_ranges_find_last 202207L // also in <algorithm> #define __cpp_lib_ranges_fold 202207L // also in <algorithm> #define __cpp_lib_ranges_iota 202202L // also in <numeric> #define __cpp_lib_ranges_join_with 202202L // freestanding, also in <ranges> #define __cpp_lib_ranges_repeat 202207L // freestanding, also in <ranges> #define __cpp_lib_ranges_slide 202202L // freestanding, also in <ranges> #define __cpp_lib_ranges_starts_ends_with 202106L // also in <algorithm> #define __cpp_lib_ranges_stride 202207L // freestanding, also in <ranges> #define __cpp_lib_ranges_to_container 202202L // freestanding, also in <ranges> #define __cpp_lib_ranges_zip 202110L // freestanding, also in <ranges>, <tuple>, <utility> #define __cpp_lib_ratio 202306L // also in <ratio> #define __cpp_lib_raw_memory_algorithms 201606L // also in <memory> #define __cpp_lib_rcu 202306L // also in <rcu> #define __cpp_lib_reference_from_temporary 202202L // freestanding, also in <type_traits> #define __cpp_lib_remove_cvref 201711L // freestanding, also in <type_traits> #define __cpp_lib_result_of_sfinae 201210L // freestanding, also in <functional>, <type_traits> #define __cpp_lib_robust_nonmodifying_seq_ops 201304L // also in <algorithm> #define __cpp_lib_sample 201603L // also in <algorithm> #define __cpp_lib_saturation_arithmetic 202311L // also in <numeric> #define __cpp_lib_scoped_lock 201703L // also in <mutex> #define __cpp_lib_semaphore 201907L // also in <semaphore> #define __cpp_lib_shared_mutex 201505L // also in <shared_mutex> #define __cpp_lib_shared_ptr_arrays 201707L // also in <memory> #define __cpp_lib_shared_ptr_weak_type 201606L // also in <memory> #define __cpp_lib_shared_timed_mutex 201402L // also in <shared_mutex> #define __cpp_lib_shift 202202L // also in <algorithm> #define __cpp_lib_smart_ptr_for_overwrite 202002L // also in <memory> #define __cpp_lib_smart_ptr_owner_equality 202306L // also in <memory> #define __cpp_lib_source_location 201907L // freestanding, also in <source_location> #define __cpp_lib_span 202311L // freestanding, also in <span> #define __cpp_lib_span_initializer_list 202311L // also in <span> #define __cpp_lib_spanstream 202106L // also in <spanstream> #define __cpp_lib_ssize 201902L // freestanding, also in <iterator> #define __cpp_lib_sstream_from_string_view 202306L // also in <sstream> #define __cpp_lib_stacktrace 202011L // also in <stacktrace> #define __cpp_lib_start_lifetime_as 202207L // freestanding, also in <memory> #define __cpp_lib_starts_ends_with 201711L // also in <string>, <string_view> #define __cpp_lib_stdatomic_h 202011L // also in <stdatomic.h> #define __cpp_lib_string_contains 202011L // also in <string>, <string_view> #define __cpp_lib_string_resize_and_overwrite 202110L // also in <string> #define __cpp_lib_string_udls 201304L // also in <string> #define __cpp_lib_string_view 201803L // also in <string>, <string_view> #define __cpp_lib_submdspan 202306L // also in <mdspan> #define __cpp_lib_syncbuf 201803L // also in <syncstream> #define __cpp_lib_text_encoding 202306L // also in <text_encoding> #define __cpp_lib_three_way_comparison 201907L // freestanding, also in <compare> #define __cpp_lib_to_address 201711L // freestanding, also in <memory> #define __cpp_lib_to_array 201907L // also in <array> #define __cpp_lib_to_chars 202306L // also in <charconv> #define __cpp_lib_to_string 202306L // also in <string> #define __cpp_lib_to_underlying 202102L // freestanding, also in <utility> #define __cpp_lib_transformation_trait_aliases 201304L // freestanding, also in <type_traits> #define __cpp_lib_transparent_operators 201510L // freestanding, also in <memory>, <functional> #define __cpp_lib_tuple_element_t 201402L // freestanding, also in <tuple> #define __cpp_lib_tuple_like 202311L // also in <utility>, <tuple>, <map>, <unordered_map> #define __cpp_lib_tuples_by_type 201304L // freestanding, also in <utility>, <tuple> #define __cpp_lib_type_identity 201806L // freestanding, also in <type_traits> #define __cpp_lib_type_trait_variable_templates 201510L // freestanding, also in <type_traits> #define __cpp_lib_uncaught_exceptions 201411L // freestanding, also in <exception> #define __cpp_lib_unordered_map_try_emplace 201411L // also in <unordered_map> #define __cpp_lib_unreachable 202202L // freestanding, also in <utility> #define __cpp_lib_unwrap_ref 201811L // freestanding, also in <type_traits> #define __cpp_lib_variant 202306L // also in <variant> #define __cpp_lib_void_t 201411L // freestanding, also in <type_traits>
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The macro __cpp_lib_freestanding_operator_new is defined to the integer literal 202306L if all the default versions of the replaceable global allocation functions meet the requirements of a hosted implementation, and to the integer literal 0 otherwise ([new.delete]).
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Recommended practice: Freestanding implementations should only define a macro from <version> if the implementation provides the corresponding facility in its entirety.