Feature Test Macro Support

Overview

This file documents the feature test macros currently supported by libc++.

Status

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	unimplemented
__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	unimplemented
__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	unimplemented
__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	unimplemented
__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	201606L
__cpp_lib_void_t	201411L
C++ 2a
__cpp_lib_array_constexpr	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	unimplemented
__cpp_lib_atomic_wait	201907L
__cpp_lib_bind_front	unimplemented
__cpp_lib_bit_cast	unimplemented
__cpp_lib_char8_t	201811L
__cpp_lib_concepts	unimplemented
__cpp_lib_constexpr_dynamic_alloc	201907L
__cpp_lib_constexpr_misc	unimplemented
__cpp_lib_constexpr_swap_algorithms	unimplemented
__cpp_lib_constexpr_utility	201811L
__cpp_lib_destroying_delete	201806L
__cpp_lib_endian	201907L
__cpp_lib_erase_if	202002L
__cpp_lib_generic_unordered_lookup	unimplemented
__cpp_lib_interpolate	201902L
__cpp_lib_is_constant_evaluated	201811L
__cpp_lib_list_remove_return_type	201806L
__cpp_lib_math_constants	201907L
__cpp_lib_ranges	unimplemented
__cpp_lib_span	202002L
__cpp_lib_three_way_comparison	unimplemented
__cpp_lib_to_array	201907L