Template:cpp/utility/lib feature macros

Macro name	Feature	Value	Std	Paper(s)
__cpp_lib_adaptor_iterator_pair_constructor	Iterator pair constructors for std::stack and std::queue	202106L	(C++23)	P1425R4
__cpp_lib_addressof_constexpr	Constexpr std::addressof	201603L	(C++17)	LWG2296
__cpp_lib_algorithm_default_value_type	Enabling list-initialization for algorithms	202403L	(C++26)	P2248R8 P3217R0
__cpp_lib_algorithm_iterator_requirements	Ranges iterators as inputs to non-Ranges algorithms	202207L	(C++23)	P2408R5
__cpp_lib_aligned_accessor	std::aligned_accessor: an std::mdspan accessor expressing pointer over-alignment	202411L	(C++26)	P2897R7
__cpp_lib_allocate_at_least	Size-feedback in the allocator interface, e.g.: std::allocator::allocate_at_least, std::allocator_traits::allocate_at_least	202302L	(C++23)	P0401R6 P2652R2 LWG3887
__cpp_lib_allocator_traits_is_always_equal	std::allocator_traits::is_always_equal, noexcept cleanups	201411L	(C++17)	N4258
__cpp_lib_any	std::any	201606L	(C++17)	P0220R1 P0032R3
__cpp_lib_apply	std::apply	201603L	(C++17)	P0220R1
__cpp_lib_array_constexpr	Constexpr for std::reverse_iterator, std::move_iterator, std::array and range access	201603L	(C++17)	P0031R0
	ConstexprIterator; constexpr comparison for std::array; misc constexpr bits (std::array::fill et al.)	201811L	(C++20)	P0858R0 LWG3257 P1023R0 P1032R1
__cpp_lib_as_const	std::as_const	201510L	(C++17)	P0007R1
__cpp_lib_associative_heterogeneous_erasure	Heterogeneous erasure in associative containers and unordered associative containers	202110L	(C++23)	P2077R3
__cpp_lib_associative_heterogeneous_insertion	Heterogeneous overloads for the remaining member functions in ordered and unordered associative containers	202306L	(C++26)	P2363R5
__cpp_lib_assume_aligned	std::assume_aligned	201811L	(C++20)	P1007R3
__cpp_lib_atomic_flag_test	std::atomic_flag::test	201907L	(C++20)	P1135R6
__cpp_lib_atomic_float	Floating-point atomic	201711L	(C++20)	P0020R6
__cpp_lib_atomic_is_always_lock_free	Constexpr std::atomic<T>::is_always_lock_free	201603L	(C++17)	P0152R1
__cpp_lib_atomic_lock_free_type_aliases	Atomic lockfree integral types (std::atomic_signed_lock_free, std::atomic_unsigned_lock_free)	201907L	(C++20)	P1135R6
__cpp_lib_atomic_min_max	Atomic minimum/maximum (std::atomic::fetch_min, std::atomic::fetch_max, etc)	202403L	(C++26)	P0493R5
__cpp_lib_atomic_ref	std::atomic_ref	201806L	(C++20)	P0019R8
	std::atomic_ref::address()	202411L	(C++26)	P2835R7
__cpp_lib_atomic_shared_ptr	std::atomic<std::shared_ptr>	201711L	(C++20)	P0718R2
__cpp_lib_atomic_value_initialization	Fixing atomic initialization (value-initialize std::atomic by default)	201911L	(C++20)	P0883R2
__cpp_lib_atomic_wait	Efficient std::atomic waiting	201907L	(C++20)	P1135R6
__cpp_lib_barrier	std::barrier	201907L	(C++20)	P1135R6
	std::barrier's phase completion guarantees	202302L	(C++23)	P2588R3
__cpp_lib_bind_back	std::bind_back	202202L	(C++23)	P2387R3
	Allow passing callable objects as non-type template arguments to std::bind_back	202306L	(C++26)	P2714R1
__cpp_lib_bind_front	std::bind_front	201907L	(C++20)	P0356R5 P1651R0
	Allow passing callable objects as non-type template arguments to std::bind_front	202306L	(C++26)	P2714R1
__cpp_lib_bit_cast	std::bit_cast	201806L	(C++20)	P0476R2
__cpp_lib_bitops	Bit operations	201907L	(C++20)	P0553R4
__cpp_lib_bitset	Interfacing std::bitset with std::string_view	202306L	(C++26)	P2697R1
__cpp_lib_bool_constant	std::bool_constant	201505L	(C++17)	N4389
__cpp_lib_bounded_array_traits	std::is_bounded_array, std::is_unbounded_array	201902L	(C++20)	P1357R1
__cpp_lib_boyer_moore_searcher	Searchers	201603L	(C++17)	P0220R1
__cpp_lib_byte	std::byte	201603L	(C++17)	P0298R3
__cpp_lib_byteswap	std::byteswap	202110L	(C++23)	P1272R4
__cpp_lib_char8_t	Library support for char8_t	201907L	(C++20)	P0482R6 P1423R3
__cpp_lib_chrono	Rounding functions for std::chrono::duration and std::chrono::time_point	201510L	(C++17)	P0092R1
	Constexpr for all the member functions of std::chrono::duration and std::chrono::time_point	201611L		P0505R0
	Calendars and Time zones	201907L	(C++20)	P0355R7 P1466R3
	Hashing support for std::chrono value classes	202306L	(C++26)	P2592R3
__cpp_lib_chrono_udls	User-defined literals for time types	201304L	(C++14)	N3642
__cpp_lib_clamp	std::clamp	201603L	(C++17)	P0025R1
__cpp_lib_common_reference	Make std::common_reference_t of std::reference_wrapper a reference type	202302L	(C++23)	P2655R3
__cpp_lib_common_reference_wrapper	Make std::common_reference_t of std::reference_wrapper a reference type	202302L	(C++23)	P2655R3
__cpp_lib_complex_udls	User-defined Literals for std::complex	201309L	(C++14)	N3779
__cpp_lib_concepts	Standard library concepts	202002L	(C++20)	P0898R3 P1754R1 P1964R2
	Move-only types for equality_comparable_with, totally_ordered_with, and three_way_comparable_with	202207L	(C++23)	P2404R3
__cpp_lib_constexpr_algorithms	Constexpr for algorithms	201806L	(C++20)	P0202R3 P0879R0 LWG3256 LWG3792
	Constexpr stable sorting	202306L	(C++26)	P2562R1
__cpp_lib_constexpr_atomic	Constexpr std::atomic and std::atomic_ref	202411L	(C++26)	P3309R3
__cpp_lib_constexpr_bitset	A more constexpr std::bitset	202207L	(C++23)	P2417R2
__cpp_lib_constexpr_charconv	Constexpr for std::to_chars and std::from_chars for integral types	202207L	(C++23)	P2291R3
__cpp_lib_constexpr_cmath	Constexpr for mathematical functions in <cmath> and <cstdlib>	202202L	(C++23)	P0533R9
	More constexpr for <cmath>	202306L	(C++26)	P1383R2
__cpp_lib_constexpr_complex	Constexpr for std::complex	201711L	(C++20)	P0415R1
	More constexpr for <complex>	202306L	(C++26)	P1383R2
__cpp_lib_constexpr_deque	Constexpr std::deque	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_dynamic_alloc	Constexpr for std::allocator and related utilities	201907L	(C++20)	P0784R7
__cpp_lib_constexpr_exceptions	Constexpr for exception types, e.g. std::bad_alloc, std::bad_cast etc.	202411L	(C++26)	P3068R6
	Constexpr for more exception types	202502L		P3378R2
__cpp_lib_constexpr_flat_map	Constexpr std::flat_map and std::flat_multimap	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_flat_set	Constexpr std::flat_set and std::flat_multiset	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_forward_list	Constexpr std::forward_list	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_functional	Misc constexpr bits (std::default_searcher); constexpr INVOKE	201907L	(C++20)	P1032R1 P1065R2
__cpp_lib_constexpr_inplace_vector	Constexpr std::inplace_vector for non-trivial types	202502L	(C++26)	P3074R7
__cpp_lib_constexpr_iterator	Misc constexpr bits (std::insert_iterator et al.)	201811L	(C++20)	P1032R1
__cpp_lib_constexpr_list	Constexpr std::list	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_map	Constexpr std::map and std::multimap	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_memory	Constexpr in std::pointer_traits	201811L	(C++20)	P1006R1
	Constexpr std::unique_ptr	202202L	(C++23)	P2273R3
__cpp_lib_constexpr_new	Constexpr placement new	202406L	(C++26)	P2747R2
__cpp_lib_constexpr_numeric	Constexpr for algorithms in <numeric>	201911L	(C++20)	P1645R1
__cpp_lib_constexpr_queue	Constexpr std::queue and std::priority_queue	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_set	Constexpr std::set and std::multiset	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_stack	Constexpr std::stack	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_string	More constexpr std::char_traits	201611L	(C++17)	P0426R1
	Fully constexpr std::char_traits	201811L	(C++20)	P1032R1
	Constexpr std::string	201907L		P0980R1
__cpp_lib_constexpr_string_view	Misc constexpr bits (std::string_view::copy)	201811L	(C++20)	P1032R1
__cpp_lib_constexpr_tuple	Misc constexpr bits (std::tuple::operator= et al.)	201811L	(C++20)	P1032R1
__cpp_lib_constexpr_typeinfo	Constexpr for std::type_info::operator==	202106L	(C++23)	P1328R1
__cpp_lib_constexpr_unordered_map	Constexpr std::unordered_map and std::unordered_multimap	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_unordered_set	Constexpr std::unordered_set and std::unordered_multiset	202502L	(C++26)	P3372R3
__cpp_lib_constexpr_utility	Misc constexpr bits (std::pair::operator= et al.)	201811L	(C++20)	P1032R1
__cpp_lib_constexpr_vector	Constexpr for std::vector	201907L	(C++20)	P1004R2
__cpp_lib_constrained_equality	Constrained relational operators for std::pair, std::tuple, std::optional, and std::variant	202403L	(C++26)	P2944R3
	Constraining std::expected equality operators	202411L		P3379R0
__cpp_lib_containers_ranges	Ranges-aware construction and insertion for containers and strings	202202L	(C++23)	P1206R7
__cpp_lib_contracts	<contracts>: Contracts support	202502L	(C++26)	P2900R14
__cpp_lib_copyable_function	std::copyable_function	202306L	(C++26)	P2548R6
__cpp_lib_coroutine	Coroutines (library support)	201902L	(C++20)	P0912R5 LWG3393
__cpp_lib_debugging	<debugging>: Debugging support	202311L	(C++26)	P2546R5
	Replaceable std::is_debugger_present	202403L		P2810R4
__cpp_lib_destroying_delete	Destroying operator delete (library support)	201806L	(C++20)	P0722R3
__cpp_lib_enable_shared_from_this	std::enable_shared_from_this::weak_from_this	201603L	(C++17)	P0033R1
__cpp_lib_endian	std::endian	201907L	(C++20)	P0463R1 P1612R1
__cpp_lib_erase_if	Uniform container erasure	202002L	(C++20)	P1209R0 P1115R3
__cpp_lib_exchange_function	std::exchange	201304L	(C++14)	N3668
__cpp_lib_execution	Execution policies	201603L	(C++17)	P0024R2
	std::execution::unsequenced_policy	201902L	(C++20)	P1001R2
__cpp_lib_expected	class template std::expected	202202L	(C++23)	P0323R12
	Monadic functions for std::expected	202211L		P2505R5
__cpp_lib_filesystem	Filesystem library	201703L	(C++17)	P0218R1 P0219R1 P0392R0 P0317R1
__cpp_lib_flat_map	std::flat_map and std::flat_multimap	202207L	(C++23)	P0429R9
__cpp_lib_flat_set	std::flat_set and std::flat_multiset	202207L	(C++23)	P1222R4 LWG3751
__cpp_lib_format	Text formatting	201907L	(C++20)	P0645R10 P1361R2 P1652R1
	Compile-time format string checks; Reducing parameterization of std::vformat_to	202106L	(C++23) (DR20)	P2216R3
	Fixing locale handling in chrono formatters; Supporting non-const-formattable types	202110L		P2372R3 P2418R2
	Exposing std::basic_format_string; clarify handling of encodings in localized formatting of chrono types	202207L	(C++23)	P2419R2 P2508R1
	Formatting pointers	202304L	(C++26)	P2510R3
	Type-checking format args	202305L		P2757R3
	Member visit	202306L		P2637R3
	Runtime format strings	202311L		P2918R2
	Renaming std::runtime_format to std::dynamic_format	202603L		P2918R2
__cpp_lib_format_path	Formatting of std::filesystem::path	202403L	(C++26)	P2845R8
__cpp_lib_format_ranges	Formatting ranges	202207L	(C++23)	P2286R8 P2585R1 LWG3750
__cpp_lib_format_uchar	Fix formatting of code units as integers	202311L	(C++26)	P2909R4
__cpp_lib_formatters	Formatting std::thread::id and std::stacktrace	202302L	(C++23)	P2693R1
__cpp_lib_forward_like	std::forward_like	202207L	(C++23)	P2445R1
__cpp_lib_freestanding_algorithm	Freestanding facilities in <algorithm>	202311L	(C++26)	P2407R5
__cpp_lib_freestanding_array	Make parts of std::array freestanding	202311L	(C++26)	P2407R5
__cpp_lib_freestanding_char_traits	Freestanding std::char_traits	202306L	(C++26)	P2338R4
__cpp_lib_freestanding_charconv	Freestanding facilities in <charconv>	202306L	(C++26)	P2338R4
__cpp_lib_freestanding_cstdlib	Freestanding facilities in <cstdlib>	202306L	(C++26)	P2338R4
__cpp_lib_freestanding_cstring	Freestanding facilities in <cstring>	202306L	(C++26)	P2338R4
	Removing std::strtok from freestanding facilities	202311L		P2937R0
__cpp_lib_freestanding_cwchar	Freestanding facilities in <cwchar>	202306L	(C++26)	P2338R4
__cpp_lib_freestanding_errc	Freestanding std::errc	202306L	(C++26)	P2338R4
__cpp_lib_freestanding_expected	Make parts of std::expected freestanding	202311L	(C++26)	P2833R2
__cpp_lib_freestanding_feature_test_macros	Support for freestanding feature-test macros	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_functional	Freestanding facilities in <functional>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_iterator	Freestanding facilities in <iterator>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_mdspan	Freestanding std::mdspan	202311L	(C++26)	P2833R2
__cpp_lib_freestanding_memory	Freestanding facilities in <memory>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_numeric	Freestanding facilities in <numeric> (saturation arithmetic)	202311L	(C++26)	P0543R3
__cpp_lib_freestanding_operator_new	Definition of operator new (optional in freestanding implementations)	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_optional	Making parts of std::optional freestanding	202311L	(C++26)	P2407R5
__cpp_lib_freestanding_ranges	Freestanding facilities in <ranges>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_ratio	Freestanding facilities in <ratio>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_string_view	Making parts of std::string_view freestanding	202311L	(C++26)	P2407R5
__cpp_lib_freestanding_tuple	Freestanding facilities in <tuple>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_utility	Freestanding facilities in <utility>	202306L	(C++26)	P2198R7
__cpp_lib_freestanding_variant	Making parts of std::variant freestanding	202311L	(C++26)	P2407R5
__cpp_lib_fstream_native_handle	Obtaining native handles from file streams	202306L	(C++26)	P1759R6
__cpp_lib_function_ref	std::function_ref: A type-erased callable reference	202306L	(C++26)	P0792R14
__cpp_lib_gcd_lcm	std::gcd, std::lcm	201606L	(C++17)	P0295R0
__cpp_lib_generator	std::generator: Synchronous coroutine generator for ranges	202207L	(C++23)	P2502R2
__cpp_lib_generic_associative_lookup	Heterogeneous comparison lookup in associative containers	201304L	(C++14)	N3657
__cpp_lib_generic_unordered_lookup	Heterogeneous comparison lookup in unordered associative containers	201811L	(C++20)	P0919R3
__cpp_lib_hardware_interference_size	std::hardware_{constructive, destructive}_interference_size	201703L	(C++17)	P0154R1
__cpp_lib_has_unique_object_representations	std::has_unique_object_representations	201606L	(C++17)	P0258R2
__cpp_lib_hazard_pointer	<hazard_pointer>: Hazard pointers	202306L	(C++26)	P2530R3
__cpp_lib_hive	<hive>: a bucket-based container that re-uses memory locations from erased elements	202502L	(C++26)	P0447R28
__cpp_lib_hypot	3-argument overload of std::hypot	201603L	(C++17)	P0030R1
__cpp_lib_incomplete_container_elements	Minimal incomplete type support for std::forward_list, std::list, and std::vector	201505L	(C++17)	N4510
__cpp_lib_indirect	std::indirect	202502L	(C++26)	P3019R14
__cpp_lib_inplace_vector	std::inplace_vector: Dynamically-resizable vector with fixed capacity (inplace storage)	202406L	(C++26)	P0843R14
__cpp_lib_int_pow2	Integral power-of-2 operations (std::has_single_bit, std::bit_ceil, std::bit_floor, std::bit_width)	202002L	(C++20)	P0556R3 P1956R1
__cpp_lib_integer_comparison_functions	Integer comparison functions	202002L	(C++20)	P0586R2
__cpp_lib_integer_sequence	Compile-time integer sequences	201304L	(C++14)	N3658
__cpp_lib_integral_constant_callable	std::integral_constant	201304L	(C++14)	N3545
__cpp_lib_interpolate	std::lerp, std::midpoint	201902L	(C++20)	P0811R3
__cpp_lib_invoke	std::invoke	201411L	(C++17)	N4169
__cpp_lib_invoke_r	std::invoke_r	202106L	(C++23)	P2136R3
__cpp_lib_ios_noreplace	Support exclusive mode for fstreams	202207L	(C++23)	P2467R1
__cpp_lib_is_aggregate	std::is_aggregate	201703L	(C++17)	LWG2911
__cpp_lib_is_constant_evaluated	std::is_constant_evaluated	201811L	(C++20)	P0595R2
__cpp_lib_is_final	std::is_final	201402L	(C++14)	LWG2112
__cpp_lib_is_implicit_lifetime	std::is_implicit_lifetime	202302L	(C++23)	P2674R1
__cpp_lib_is_invocable	std::is_invocable, std::invoke_result	201703L	(C++17)	P0604R0
__cpp_lib_is_layout_compatible	std::is_layout_compatible	201907L	(C++20)	P0466R5
__cpp_lib_is_nothrow_convertible	std::is_nothrow_convertible	201806L	(C++20)	P0758R1 LWG3356
__cpp_lib_is_null_pointer	std::is_null_pointer	201309L	(C++14) (DR11)	LWG2247
__cpp_lib_is_pointer_interconvertible	Pointer-interconvertibility traits: std::is_pointer_interconvertible_with_class, std::is_pointer_interconvertible_base_of	201907L	(C++20)	P0466R5
__cpp_lib_is_scoped_enum	std::is_scoped_enum	202011L	(C++23)	P1048R1
__cpp_lib_is_sufficiently_aligned	std::is_sufficiently_aligned: checks a pointer’s alignment precondition	202411L	(C++26)	P2897R7
__cpp_lib_is_swappable	(nothrow-)swappable traits	201603L	(C++17)	P0185R1
__cpp_lib_is_virtual_base_of	std::is_virtual_base_of: Type trait for detecting virtual base classes	202406L	(C++26)	P2985R0
__cpp_lib_is_within_lifetime	Checking if a union alternative is active (std::is_within_lifetime)	202306L	(C++26)	P2641R4
__cpp_lib_jthread	Stop token and joining thread	201911L	(C++20)	P0660R10 P1869R1
__cpp_lib_latch	std::latch	201907L	(C++20)	P1135R6
__cpp_lib_launder	CWG issue 1776: Replacement of class objects containing reference members (std::launder)	201606L	(C++17)	P0137R1
__cpp_lib_linalg	A free function linear algebra interface based on the BLAS	202311L	(C++26)	P1673R13
__cpp_lib_list_remove_return_type	Change the return type of the remove(), remove_if() and unique() of std::forward_list and std::list	201806L	(C++20)	P0646R1
__cpp_lib_logical_traits	Logical operations on type traits	201510L	(C++17)	P0013R1
__cpp_lib_make_from_tuple	std::make_from_tuple	201606L	(C++17)	P0209R2
__cpp_lib_make_reverse_iterator	std::make_reverse_iterator	201402L	(C++14)	LWG2285
__cpp_lib_make_unique	std::make_unique	201304L	(C++14)	N3656
__cpp_lib_map_try_emplace	std::map::try_emplace, std::map::insert_or_assign	201411L	(C++17)	N4279
__cpp_lib_math_constants	Mathematical constants	201907L	(C++20)	P0631R8
__cpp_lib_math_special_functions	Mathematical special functions	201603L	(C++17)	P0226R1
__cpp_lib_mdspan	std::mdspan	202207L	(C++23)	P0009R18 P2599R2 P2604R0 P2613R1
	std::dims for std::mdspan	202406L	(C++26)	P2389R2
__cpp_lib_memory_resource	std::pmr::memory_resource	201603L	(C++17)	P0220R1
__cpp_lib_modules	Standard library modules std and std.compat	202207L	(C++23)	P2465R3
__cpp_lib_move_iterator_concept	Make std::move_iterator a random access iterator	202207L	(C++23)	P2520R0
__cpp_lib_move_only_function	std::move_only_function	202110L	(C++23)	P0288R9
__cpp_lib_node_extract	Splicing maps and sets (std::map::extract, std::map::merge, insert(node_type), etc)	201606L	(C++17)	P0083R3
__cpp_lib_nonmember_container_access	std::size, std::data and std::empty	201411L	(C++17)	N4280
__cpp_lib_not_fn	std::not_fn	201603L	(C++17)	P0005R4
	Allow passing callable objects as non-type template arguments to std::not_fn	202306L	(C++26)	P2714R1
__cpp_lib_null_iterators	Null LegacyForwardIterators	201304L	(C++14)	N3644
__cpp_lib_optional	std::optional	201606L	(C++17)	P0220R1 P0032R3 P0307R2
	Fully constexpr std::optional	202106L	(C++23) (DR20)	P2231R1
	Monadic operations in std::optional	202110L	(C++23)	P0798R8 LWG3621
__cpp_lib_optional_range_support	std::optional range support	202406L	(C++26)	P3168R2
__cpp_lib_out_ptr	std::out_ptr, std::inout_ptr	202106L	(C++23)	P1132R8
	Freestanding std::out_ptr, std::inout_ptr	202311L	(C++26)	P2833R2
__cpp_lib_parallel_algorithm	Parallel algorithms	201603L	(C++17)	P0024R2
__cpp_lib_philox_engine	std::philox_engine: Counter-based random number engine	202406L	(C++26)	P2075R6
__cpp_lib_polymorphic	std::polymorphic	202502L	(C++26)	P3019R14
__cpp_lib_polymorphic_allocator	std::pmr::polymorphic_allocator as a vocabulary type	201902L	(C++20)	P0339R6 LWG3437
__cpp_lib_print	Formatted output	202207L	(C++23)	P2093R14
	Permit an efficient implementation of std::print	202403L	(C++26) (DR23)	P3107R5
	std::print more types faster with less memory	202406L		P3235R3
__cpp_lib_quoted_string_io	std::quoted	201304L	(C++14)	N3654
__cpp_lib_ranges	Ranges library and constrained algorithms	201911L	(C++20)	P0896R4 P1035R7 P1716R3
	Non-default-initializable views	202106L	(C++23) (DR20)	P2325R3
	Views with ownership	202110L		P2415R2
	std::ranges::range_adaptor_closure	202202L	(C++23)	P2387R3
	Relaxing range adaptors to allow for move-only types	202207L		P2494R2
	Removing “poison pill” overloads in ranges::begin, ranges::end, ranges::rbegin, ranges::rend, and ranges::size	202211L		P2602R2
	Relaxing ranges to allow certain projections	202302L		P2609R3
	Removing the common reference requirement from the indirectly invocable concepts	202406L	(C++26) (DR20)	P2997R1
__cpp_lib_ranges_as_const	std::const_iterator, std::ranges::as_const_view	202207L	(C++23)	P2278R4
	Making std::basic_const_iterator follow its underlying type's convertibility	202311L	(C++26)	P2836R1
__cpp_lib_ranges_as_input	std::ranges::as_input_view	202502L	(C++26)	P3137R3 P3828R1
__cpp_lib_ranges_as_rvalue	std::ranges::as_rvalue_view	202207L	(C++23)	P2446R2
__cpp_lib_ranges_cache_latest	std::ranges::cache_latest_view	202411L	(C++26)	P3138R5
__cpp_lib_ranges_cartesian_product	std::ranges::cartesian_product_view	202207L	(C++23)	P2374R4 P2540R1
__cpp_lib_ranges_chunk	std::ranges::chunk_view	202202L	(C++23)	P2442R1
__cpp_lib_ranges_chunk_by	std::ranges::chunk_by_view	202202L	(C++23)	P2443R1
__cpp_lib_ranges_concat	std::ranges::concat_view	202403L	(C++26)	P2542R8
__cpp_lib_ranges_contains	std::ranges::contains	202207L	(C++23)	P2302R4
__cpp_lib_ranges_enumerate	std::ranges::enumerate_view	202302L	(C++23)	P2164R9
__cpp_lib_ranges_find_last	std::ranges::find_last, std::ranges::find_last_if, and std::ranges::find_last_if_not	202207L	(C++23)	P1223R5 LWG3807
__cpp_lib_ranges_fold	std::ranges fold algorithms	202207L	(C++23)	P2322R6
__cpp_lib_ranges_generate_random	Vector API for random number generation (std::ranges::generate_random)	202403L	(C++26)	P1068R11
__cpp_lib_ranges_iota	std::ranges::iota	202202L	(C++23)	P2440R1
__cpp_lib_ranges_join_with	std::ranges::join_with_view	202202L	(C++23)	P2441R2
__cpp_lib_ranges_repeat	std::ranges::repeat_view	202207L	(C++23)	P2474R2
__cpp_lib_ranges_reserve_hint	std::ranges::approximately_sized_range and std::ranges::reserve_hint	202502L	(C++26)	P2846R6
__cpp_lib_ranges_slide	std::ranges::slide_view	202202L	(C++23)	P2442R1
__cpp_lib_ranges_starts_ends_with	std::ranges::starts_with, std::ranges::ends_with	202106L	(C++23)	P1659R3
__cpp_lib_ranges_stride	std::ranges::stride_view	202207L	(C++23)	P1899R3
__cpp_lib_ranges_to_container	std::ranges::to	202202L	(C++23)	P1206R7
__cpp_lib_ranges_zip	std::ranges::zip_view, std::ranges::zip_transform_view, std::ranges::adjacent_view, std::ranges::adjacent_transform_view	202110L	(C++23)	P2321R2
__cpp_lib_ratio	Adding the new 2022 SI prefixes	202306L	(C++26)	P2734R0
__cpp_lib_raw_memory_algorithms	Extending memory management tools	201606L	(C++17)	P0040R3
	Constexpr for specialized memory algorithms	202411L	(C++26)	P3369R0 P3508R0
__cpp_lib_rcu	<rcu>: Read-Copy Update (RCU)	202306L	(C++26)	P2545R4
__cpp_lib_reference_from_temporary	std::reference_constructs_from_temporary and std::reference_converts_from_temporary	202202L	(C++23)	P2255R2
__cpp_lib_reference_wrapper	Comparisons for std::reference_wrapper	202403L	(C++26)	P2944R3
__cpp_lib_remove_cvref	std::remove_cvref	201711L	(C++20)	P0550R2
__cpp_lib_result_of_sfinae	std::result_of and SFINAE	201210L	(C++14)	N3462
__cpp_lib_robust_nonmodifying_seq_ops	Making non-modifying sequence operations more robust (two-range overloads for std::mismatch, std::equal and std::is_permutation)	201304L	(C++14)	N3671
__cpp_lib_sample	std::sample	201603L	(C++17)	P0220R1
__cpp_lib_saturation_arithmetic	Saturation arithmetic	202311L	(C++26)	P0543R3
	Renaming saturation arithmetic functions	202603L	(C++26)	P4052R0
__cpp_lib_scoped_lock	std::scoped_lock	201703L	(C++17)	P0156R2
__cpp_lib_semaphore	std::counting_semaphore, std::binary_semaphore	201907L	(C++20)	P1135R6
__cpp_lib_senders	std::execution: Sender-receiver model of execution control	202406L	(C++26)	P2300R10
__cpp_lib_shared_mutex	std::shared_mutex (untimed)	201505L	(C++17)	N4508
__cpp_lib_shared_ptr_arrays	std::shared_ptr	201611L	(C++17)	P0497R0
	Array support of std::make_shared	201707L	(C++20)	P0674R1
__cpp_lib_shared_ptr_weak_type	shared_ptr::weak_type	201606L	(C++17)	P0163R0
__cpp_lib_shared_timed_mutex	std::shared_timed_mutex	201402L	(C++14)	N3891
__cpp_lib_shift	std::shift_left and std::shift_right	201806L	(C++20)	P0769R2
	std::ranges::shift_left and std::ranges::shift_right	202202L	(C++23)	P2440R1
__cpp_lib_simd	<simd>: Data-parallel types	202411L	(C++26)	P1928R15
__cpp_lib_smart_ptr_for_overwrite	Smart pointer creation with default initialization (std::allocate_shared_for_overwrite, std::make_shared_for_overwrite, std::make_unique_for_overwrite)	202002L	(C++20)	P1020R1 P1973R1
__cpp_lib_smart_ptr_owner_equality	Enabling the use of std::weak_ptr as keys in unordered associative containers	202306L	(C++26)	P1901R2
__cpp_lib_source_location	Source-code information capture (std::source_location)	201907L	(C++20)	P1208R6
__cpp_lib_span	std::span	202002L	(C++20)	P0122R7 LWG3274 P1024R3 P1976R2
	Making parts of std::span freestanding	202311L	(C++26)	P2821R5 P2833R2
__cpp_lib_spanstream	std::spanbuf, std::spanstream	202106L	(C++23)	P0448R4
__cpp_lib_ssize	std::ssize and unsigned std::span::size	201902L	(C++20)	P1227R2
__cpp_lib_sstream_from_string_view	Interfacing std::stringstreams with std::string_view	202306L	(C++26)	P2495R3
__cpp_lib_stacktrace	Stacktrace library	202011L	(C++23)	P0881R7
__cpp_lib_start_lifetime_as	Explicit lifetime management (std::start_lifetime_as)	202207L	(C++23)	P2590R2
__cpp_lib_starts_ends_with	String prefix and suffix checking (starts_with() and ends_with() for std::string and std::string_view)	201711L	(C++20)	P0457R2
__cpp_lib_stdatomic_h	Compatibility header for C atomic operations	202011L	(C++23)	P0943R6
__cpp_lib_string_contains	contains() for std::basic_string and std::basic_string_view	202011L	(C++23)	P1679R3
__cpp_lib_string_resize_and_overwrite	std::basic_string::resize_and_overwrite	202110L	(C++23)	P1072R10
__cpp_lib_string_udls	User-defined literals for string types	201304L	(C++14)	N3642
__cpp_lib_string_view	std::string_view	201606L	(C++17)	P0220R1 P0254R2
	ConstexprIterator	201803L	(C++20)	P0858R0 LWG3257
	Concatenation of std::strings and std::string_views	202403L	(C++26)	P2591R5
__cpp_lib_submdspan	std::submdspan	202306L	(C++26)	P2630R4
	Padded mdspan layouts	202403L		P2642R6
__cpp_lib_syncbuf	Synchronized buffered ostream (std::syncbuf, std::osyncstream) and manipulators	201803L	(C++20)	P0053R7 P0753R2
__cpp_lib_text_encoding	std::text_encoding	202306L	(C++26)	P1885R12
__cpp_lib_three_way_comparison	Three-way comparison (library support); adding three-way comparison to the library	201907L	(C++20)	P0768R1 P1614R2
__cpp_lib_to_address	Utility to convert a pointer to a raw pointer (std::to_address)	201711L	(C++20)	P0653R2
__cpp_lib_to_array	std::to_array	201907L	(C++20)	P0325R4
__cpp_lib_to_chars	Elementary string conversions (std::to_chars, std::from_chars)	201611L	(C++17)	P0067R5 P0682R1 LWG3137
	Testing for success or failure of <charconv> functions	202306L	(C++26)	P2497R0
__cpp_lib_to_string	Redefining std::to_string in terms of std::format	202306L	(C++26)	P2587R3
__cpp_lib_to_underlying	std::to_underlying	202102L	(C++23)	P1682R3
__cpp_lib_transformation_trait_aliases	Alias templates for transformation traits	201304L	(C++14)	N3655
__cpp_lib_transparent_operators	Transparent operator functors (std::less<> et al)	201210L	(C++14)	N3421
	Transparent std::owner_less (std::owner_less<void>)	201510L	(C++17)	P0074R0
__cpp_lib_tuple_element_t	std::tuple_element_t	201402L	(C++14)	N3887
__cpp_lib_tuple_like	Compatibility between std::tuple and tuple-like objects (std::pair, std::array, std::subrange)	202207L	(C++23)	P2165R4
	Add tuple protocol to std::complex	202311L	(C++26)	P2819R2
__cpp_lib_tuples_by_type	Addressing tuples by type	201304L	(C++14)	N3670
__cpp_lib_type_identity	std::type_identity	201806L	(C++20)	P0887R1
__cpp_lib_type_trait_variable_templates	Type traits variable templates (std::is_void_v, etc)	201510L	(C++17)	P0006R0
__cpp_lib_uncaught_exceptions	std::uncaught_exceptions	201411L	(C++17)	N4259
__cpp_lib_unordered_map_try_emplace	std::unordered_map::try_emplace, std::unordered_map::insert_or_assign	201411L	(C++17)	N4279
__cpp_lib_unreachable	std::unreachable	202202L	(C++23)	P0627R6
__cpp_lib_unwrap_ref	std::unwrap_ref_decay and std::unwrap_reference	201811L	(C++20)	P0318R1 LWG3348
__cpp_lib_variant	std::variant: A type-safe union for C++17	201606L	(C++17)	P0088R3 P0393R3 P0032R3
	std::visit for classes derived from std::variant	202102L	(C++23) (DR17)	P2162R2
	Fully constexpr std::variant	202106L	(C++23) (DR20)	P2231R1
	Member visit	202306L	(C++26)	P2637R3
__cpp_lib_void_t	std::void_t	201411L	(C++17)	N3911
Total number of macros: 263