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 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 unimplemented
__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_barrier 201907L
__cpp_lib_bind_front 201907L
__cpp_lib_bit_cast unimplemented
__cpp_lib_bitops unimplemented
__cpp_lib_bounded_array_traits 201902L
__cpp_lib_char8_t 201811L
__cpp_lib_concepts 202002L
__cpp_lib_constexpr_algorithms 201806L
__cpp_lib_constexpr_complex unimplemented
__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 201811L
__cpp_lib_constexpr_string_view 201811L
__cpp_lib_constexpr_tuple 201811L
__cpp_lib_constexpr_utility 201811L
__cpp_lib_constexpr_vector unimplemented
__cpp_lib_coroutine unimplemented
__cpp_lib_destroying_delete 201806L
__cpp_lib_endian 201907L
__cpp_lib_erase_if 202002L
__cpp_lib_execution unimplemented
__cpp_lib_format unimplemented
__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 unimplemented
__cpp_lib_latch 201907L
__cpp_lib_list_remove_return_type 201806L
__cpp_lib_math_constants 201907L
__cpp_lib_polymorphic_allocator unimplemented
__cpp_lib_ranges unimplemented
__cpp_lib_remove_cvref 201711L
__cpp_lib_semaphore 201907L
__cpp_lib_shift 201806L
__cpp_lib_smart_ptr_for_overwrite unimplemented
__cpp_lib_source_location unimplemented
__cpp_lib_span 202002L
__cpp_lib_ssize 201902L
__cpp_lib_starts_ends_with 201711L
__cpp_lib_string_view 201803L
__cpp_lib_syncbuf unimplemented
__cpp_lib_three_way_comparison unimplemented
__cpp_lib_to_address 201711L
__cpp_lib_to_array 201907L
__cpp_lib_unwrap_ref 201811L
C++ 2b
__cpp_lib_is_scoped_enum 202011L
__cpp_lib_stacktrace unimplemented
__cpp_lib_stdatomic_h unimplemented
__cpp_lib_string_contains 202011L
__cpp_lib_to_underlying 202102L