| .. _FeatureTestMacroTable: |
| |
| ========================== |
| Feature Test Macro Support |
| ========================== |
| |
| .. contents:: |
| :local: |
| |
| Overview |
| ======== |
| |
| This file documents the feature test macros currently supported by libc++. |
| |
| .. _feature-status: |
| |
| Status |
| ====== |
| |
| .. table:: Current Status |
| :name: feature-status-table |
| :widths: auto |
| |
| =================================================== ================= |
| Macro Name Value |
| =================================================== ================= |
| **C++ 14** |
| --------------------------------------------------------------------- |
| ``__cpp_lib_chrono_udls`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_complex_udls`` ``201309L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_exchange_function`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_generic_associative_lookup`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_integer_sequence`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_integral_constant_callable`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_final`` ``201402L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_null_pointer`` ``201309L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_make_reverse_iterator`` ``201402L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_make_unique`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_null_iterators`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_quoted_string_io`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_result_of_sfinae`` ``201210L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_robust_nonmodifying_seq_ops`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shared_timed_mutex`` ``201402L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_string_udls`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_transformation_trait_aliases`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_transparent_operators`` ``201210L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_tuple_element_t`` ``201402L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_tuples_by_type`` ``201304L`` |
| --------------------------------------------------- ----------------- |
| **C++ 17** |
| --------------------------------------------------------------------- |
| ``__cpp_lib_addressof_constexpr`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_allocator_traits_is_always_equal`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_any`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_apply`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_array_constexpr`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_as_const`` ``201510L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_is_always_lock_free`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bool_constant`` ``201505L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_boyer_moore_searcher`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_byte`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_chrono`` ``201611L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_clamp`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_enable_shared_from_this`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_execution`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_filesystem`` ``201703L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_gcd_lcm`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_hardware_interference_size`` ``201703L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_has_unique_object_representations`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_hypot`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_incomplete_container_elements`` ``201505L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_invoke`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_aggregate`` ``201703L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_invocable`` ``201703L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_swappable`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_launder`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_logical_traits`` ``201510L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_make_from_tuple`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_map_try_emplace`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_math_special_functions`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_memory_resource`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_node_extract`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_nonmember_container_access`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_not_fn`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_optional`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_parallel_algorithm`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_raw_memory_algorithms`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_sample`` ``201603L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_scoped_lock`` ``201703L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shared_mutex`` ``201505L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shared_ptr_arrays`` ``201611L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shared_ptr_weak_type`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_string_view`` ``201606L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_chars`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_transparent_operators`` ``201510L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_type_trait_variable_templates`` ``201510L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_uncaught_exceptions`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_unordered_map_try_emplace`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_variant`` ``202102L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_void_t`` ``201411L`` |
| --------------------------------------------------- ----------------- |
| **C++ 20** |
| --------------------------------------------------------------------- |
| ``__cpp_lib_array_constexpr`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_assume_aligned`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_flag_test`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_float`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_lock_free_type_aliases`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_ref`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_shared_ptr`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_value_initialization`` ``201911L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_atomic_wait`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_barrier`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bind_front`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bit_cast`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bitops`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bounded_array_traits`` ``201902L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_char8_t`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_concepts`` ``202002L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_algorithms`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_complex`` ``201711L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_dynamic_alloc`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_functional`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_iterator`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_memory`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_numeric`` ``201911L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_string`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_string_view`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_tuple`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_utility`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_vector`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_coroutine`` ``201902L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_destroying_delete`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_endian`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_erase_if`` ``202002L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_execution`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_format`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_format_uchar`` ``202311L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_generic_unordered_lookup`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_int_pow2`` ``202002L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_integer_comparison_functions`` ``202002L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_interpolate`` ``201902L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_constant_evaluated`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_layout_compatible`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_nothrow_convertible`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_pointer_interconvertible`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_jthread`` ``201911L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_latch`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_list_remove_return_type`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_math_constants`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_move_iterator_concept`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_polymorphic_allocator`` ``201902L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_remove_cvref`` ``201711L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_semaphore`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shared_ptr_arrays`` ``201707L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_shift`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_smart_ptr_for_overwrite`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_source_location`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_span`` ``202002L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ssize`` ``201902L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_starts_ends_with`` ``201711L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_string_view`` ``201803L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_syncbuf`` ``201803L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_three_way_comparison`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_address`` ``201711L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_array`` ``201907L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_type_identity`` ``201806L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_unwrap_ref`` ``201811L`` |
| --------------------------------------------------- ----------------- |
| **C++ 23** |
| --------------------------------------------------------------------- |
| ``__cpp_lib_adaptor_iterator_pair_constructor`` ``202106L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_allocate_at_least`` ``202106L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_associative_heterogeneous_erasure`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bind_back`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_byteswap`` ``202110L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_bitset`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_charconv`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_cmath`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_memory`` ``202202L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_constexpr_typeinfo`` ``202106L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_expected`` ``202211L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_format_ranges`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_formatters`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_forward_like`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_invoke_r`` ``202106L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ios_noreplace`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_is_scoped_enum`` ``202011L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_mdspan`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_move_only_function`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_optional`` ``202110L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_out_ptr`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_print`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_as_const`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_as_rvalue`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_chunk`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_chunk_by`` ``202202L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_iota`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_join_with`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_repeat`` ``202207L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_slide`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_starts_ends_with`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_to_container`` ``202202L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ranges_zip`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_reference_from_temporary`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_spanstream`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_stacktrace`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_stdatomic_h`` ``202011L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_string_contains`` ``202011L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_string_resize_and_overwrite`` ``202110L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_string`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_underlying`` ``202102L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_tuple_like`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_unreachable`` ``202202L`` |
| --------------------------------------------------- ----------------- |
| **C++ 26** |
| --------------------------------------------------------------------- |
| ``__cpp_lib_associative_heterogeneous_insertion`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bind_back`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bind_front`` ``202306L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_bitset`` ``202306L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_copyable_function`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_debugging`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_algorithm`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_array`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_cstring`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_expected`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_mdspan`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_optional`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_string_view`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_freestanding_variant`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_fstream_native_handle`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_function_ref`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_hazard_pointer`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_linalg`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_out_ptr`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_ratio`` ``202306L`` |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_rcu`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_saturation_arithmetic`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_smart_ptr_owner_equality`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_span_initializer_list`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_sstream_from_string_view`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_submdspan`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_text_encoding`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_to_chars`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_tuple_like`` *unimplemented* |
| --------------------------------------------------- ----------------- |
| ``__cpp_lib_within_lifetime`` *unimplemented* |
| =================================================== ================= |
| |
