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| − | {{title|Library feature-test macros {{mark c++20}}}} | + | {{title|Library feature-test macros {{mark since c++20}}}} |
| | {{cpp/utility/navbar}} | | {{cpp/utility/navbar}} |
| | | | |
| | Each of following macros is defined if the header {{header|version}} or one of the corresponding headers specified in the table is included. | | Each of following macros is defined if the header {{header|version}} or one of the corresponding headers specified in the table is included. |
| | | | |
| − | {| class="wikitable sortable" | + | {{include editlink|cpp/utility/feature test}} |
| − | |-
| + | |
| − | ! Macro name
| + | {{cpp/utility/feature test}} |
| − | ! Value
| + | |
| − | ! Header
| + | ===Notes=== |
| − | |-
| + | Each value in "Value" column follows the pattern: {{c/core|"yyyymmL"}}, where {{c/core|"yyyy"}} is a year, and {{c/core|"mm"}} is a month when the corresponding feature-set was accepted for standardization. Some values where increased since the time of their introduction, if capabilities of given feature where extended. The table above contains only the most recent values (that is, taken from the latest C++ language draft standard). A full set of values, including the initial and intermediate ones, can be found in [[cpp/feature test#Library features|this table]]. |
| − | | {{tt|__cpp_lib_addressof_constexpr}}
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| − | | 201603L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_allocator_traits_is_always_equal}}
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| − | | 201411L
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| − | | {{header|memory}} {{header|scoped_allocator}} {{header|string}} {{header|deque}} {{header|forward_list}} {{header|list}} {{header|vector}} {{header|map}} {{header|set}} {{header|unordered_map}} {{header|unordered_set}}
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| − | | {{tt|__cpp_lib_any}}
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| − | | 201606L
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| − | | {{header|any}}
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| − | | {{tt|__cpp_lib_apply}}
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| − | | 201603L
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| − | | {{header|tuple}}
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| − | | {{tt|__cpp_lib_array_constexpr}}
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| − | | 201811L
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| − | | {{header|iterator}} {{header|array}}
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| − | | {{tt|__cpp_lib_as_const}}
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| − | | 201510L
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| − | | {{header|utility}}
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| − | | {{tt|__cpp_lib_assume_aligned}}
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| − | | 201811L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_atomic_flag_test}}
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| − | | 201907L
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| − | | {{header|atomic}}
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| − | | {{tt|__cpp_lib_atomic_float}}
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| − | | 201711L
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| − | | {{header|atomic}}
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| − | | {{tt|__cpp_lib_atomic_is_always_lock_free}}
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| − | | 201603L
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| − | | {{header|atomic}}
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| − | | {{tt|__cpp_lib_atomic_lock_free_type_aliases}}
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| − | | 201907L
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| − | | {{header|atomic}}
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| − | |-
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| − | | {{tt|__cpp_lib_atomic_ref}}
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| − | | 201806L
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| − | | {{header|atomic}}
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| − | | {{tt|__cpp_lib_atomic_shared_ptr}}
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| − | | 201711L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_atomic_value_initialization}}
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| − | | 201911L
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| − | | {{header|atomic}} {{header|memory}}
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| − | | {{tt|__cpp_lib_atomic_wait}}
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| − | | 201907L
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| − | | {{header|atomic}}
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| − | | {{tt|__cpp_lib_barrier}}
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| − | | {{header|barrier}}
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| − | | {{tt|__cpp_lib_bind_front}}
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| − | | 201907L
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| − | | {{header|functional}}
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| − | | {{tt|__cpp_lib_bit_cast}}
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| − | | 201806L
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| − | | {{header|bit}}
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| − | | {{tt|__cpp_lib_bitops}}
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| − | | 201907L
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| − | | {{header|bit}}
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| − | | {{tt|__cpp_lib_bool_constant}}
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| − | | 201505L
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_bounded_array_traits}}
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| − | | 201902L
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_boyer_moore_searcher}}
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| − | | 201603L
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| − | | {{header|functional}}
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| − | |-
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| − | | {{tt|__cpp_lib_byte}}
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| − | | 201603L
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| − | | {{header|cstddef}}
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| − | | {{tt|__cpp_lib_char8_t}}
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| − | | 201907L
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| − | | {{header|atomic}} {{header|filesystem}} {{header|istream}} {{header|limits}} {{header|locale}} {{header|ostream}} {{header|string}} {{header|string_view}}
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| − | | {{tt|__cpp_lib_chrono}}
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| − | | {{header|chrono}}
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| − | | {{tt|__cpp_lib_chrono_udls}}
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| − | | 201304L
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| − | | {{header|chrono}}
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| − | | {{tt|__cpp_lib_clamp}}
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| − | | 201603L
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| − | | {{header|algorithm}}
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| − | | {{tt|__cpp_lib_complex_udls}}
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| − | | 201309L
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| − | | {{header|complex}}
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| − | | {{tt|__cpp_lib_concepts}}
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| − | | {{header|concepts}}
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| − | | {{tt|__cpp_lib_constexpr_algorithms}}
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| − | | {{header|algorithm}}
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| − | | {{tt|__cpp_lib_constexpr_complex}}
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| − | | {{header|complex}}
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| − | | {{tt|__cpp_lib_constexpr_dynamic_alloc}}
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| − | | 201907L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_constexpr_functional}}
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| − | | 201907L
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| − | | {{header|functional}}
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| − | | {{tt|__cpp_lib_constexpr_iterator}}
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| − | | {{header|iterator}}
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| − | | {{tt|__cpp_lib_constexpr_memory}}
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| − | | 201811L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_constexpr_numeric}}
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| − | | 201911L
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| − | | {{header|numeric}}
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| − | | {{tt|__cpp_lib_constexpr_string}}
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| − | | 201907L
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| − | | {{header|string}}
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| − | | {{tt|__cpp_lib_constexpr_string_view}}
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| − | | 201811L
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| − | | {{header|string_view}}
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| − | | {{tt|__cpp_lib_constexpr_tuple}}
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| − | | 201811L
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| − | | {{header|tuple}}
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| − | | {{tt|__cpp_lib_constexpr_utility}}
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| − | | 201811L
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| − | | {{header|utility}}
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| − | | {{tt|__cpp_lib_constexpr_vector}}
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| − | | 201907L
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| − | | {{header|vector}}
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| − | | {{tt|__cpp_lib_destroying_delete}}
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| − | | 201806L
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| − | | {{header|new}}
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| − | | {{tt|__cpp_lib_enable_shared_from_this}}
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| − | | 201603L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_endian}}
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| − | | 201907L
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| − | | {{header|bit}}
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| − | | {{tt|__cpp_lib_erase_if}}
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| − | | 201811L
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| − | | {{header|string}} {{header|deque}} {{header|forward_list}} {{header|list}} {{header|vector}} {{header|map}} {{header|set}} {{header|unordered_map}} {{header|unordered_set}}
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| − | | {{tt|__cpp_lib_exchange_function}}
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| − | | 201304L
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| − | | {{header|utility}}
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| − | | {{tt|__cpp_lib_execution}}
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| − | | 201902L
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| − | | {{header|execution}}
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| − | | {{tt|__cpp_lib_filesystem}}
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| − | | 201703L
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| − | | {{header|filesystem}}
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| − | | {{tt|__cpp_lib_format}}
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| − | | 201907L
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| − | | {{header|format}}
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| − | | {{tt|__cpp_lib_gcd_lcm}}
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| − | | 201606L
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| − | | {{header|numeric}}
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| − | |-
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| − | | {{tt|__cpp_lib_generic_associative_lookup}}
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| − | | 201304L
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| − | | {{header|map}} {{header|set}}
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| − | |- | + | |
| − | | {{tt|__cpp_lib_generic_unordered_lookup}}
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| − | | 201811L
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| − | | {{header|unordered_map}} {{header|unordered_set}}
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| − | |-
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| − | | {{tt|__cpp_lib_hardware_interference_size}}
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| − | | 201703L
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| − | | {{header|new}}
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| − | |-
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| − | | {{tt|__cpp_lib_has_unique_object_representations}}
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| − | | 201606L
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| − | | {{header|type_traits}}
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| − | |-
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| − | | {{tt|__cpp_lib_hypot}}
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| − | | 201603L
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| − | | {{header|cmath}}
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| − | | {{tt|__cpp_lib_incomplete_container_elements}}
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| − | | 201505L
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| − | | {{header|forward_list}} {{header|list}} {{header|vector}}
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| − | | {{tt|__cpp_lib_int_pow2}}
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| − | | 201806L
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| − | | {{header|bit}}
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| − | | {{tt|__cpp_lib_integer_sequence}}
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| − | | 201304L
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| − | | {{header|utility}}
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| − | | {{tt|__cpp_lib_integral_constant_callable}}
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| − | | 201304L
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_interpolate}}
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| − | | {{header|cmath}} {{header|numeric}}
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| − | | {{tt|__cpp_lib_invoke}}
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| − | | 201411L
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| − | | {{header|functional}}
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| − | | {{tt|__cpp_lib_is_aggregate}}
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| − | | {{tt|__cpp_lib_is_final}}
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| − | | {{tt|__cpp_lib_is_invocable}}
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| − | | {{tt|__cpp_lib_is_layout_compatible}}
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| − | | {{tt|__cpp_lib_is_null_pointer}}
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| − | | 201309L
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| − | | {{tt|__cpp_lib_is_pointer_interconvertible}}
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_is_swappable}}
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_jthread}}
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| − | | {{header|stop_token}} {{header|thread}}
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| − | | {{tt|__cpp_lib_latch}}
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| − | | 201907L
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| − | | {{header|latch}}
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| − | | {{tt|__cpp_lib_launder}}
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| − | | 201606L
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| − | | {{header|new}}
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| − | | {{tt|__cpp_lib_list_remove_return_type}}
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| − | | 201806L
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| − | | {{header|forward_list}} {{header|list}}
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| − | | {{tt|__cpp_lib_logical_traits}}
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| − | | 201510L
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_make_from_tuple}}
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| − | | 201606L
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| − | | {{header|tuple}}
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| − | | {{tt|__cpp_lib_make_reverse_iterator}}
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| − | | {{header|iterator}}
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| − | | {{tt|__cpp_lib_make_unique}}
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_map_try_emplace}}
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| − | | {{tt|__cpp_lib_math_constants}}
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| − | | {{header|numbers}}
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| − | | {{tt|__cpp_lib_math_special_functions}}
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| − | | {{header|cmath}}
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| − | | {{tt|__cpp_lib_memory_resource}}
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| − | | {{header|memory_resource}}
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| − | | {{tt|__cpp_lib_node_extract}}
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| − | | {{header|map}} {{header|set}} {{header|unordered_map}} {{header|unordered_set}}
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| − | | {{tt|__cpp_lib_nonmember_container_access}}
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| − | | 201411L
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| − | | {{header|iterator}} {{header|array}} {{header|deque}} {{header|forward_list}} {{header|list}} {{header|map}} {{header|regex}} {{header|set}} {{header|string}} {{header|unordered_map}} {{header|unordered_set}} {{header|vector}}
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| − | | {{header|functional}}
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| − | | {{tt|__cpp_lib_nothrow_convertible}}
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| − | | {{header|type_traits}}
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| − | | {{tt|__cpp_lib_null_iterators}}
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| − | | {{tt|__cpp_lib_optional}}
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| − | | {{header|optional}}
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| − | | {{tt|__cpp_lib_parallel_algorithm}}
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| − | | {{header|algorithm}} {{header|numeric}}
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| − | | {{tt|__cpp_lib_polymorphic_allocator}}
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| − | | 201902L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_quoted_string_io}}
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| − | | {{header|iomanip}}
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| − | | {{tt|__cpp_lib_ranges}}
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| − | | {{header|algorithm}} {{header|functional}} {{header|iterator}} {{header|memory}} {{header|ranges}}
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_remove_cvref}}
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| − | | {{tt|__cpp_lib_result_of_sfinae}}
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| − | | {{tt|__cpp_lib_robust_nonmodifying_seq_ops}}
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| − | | {{header|algorithm}}
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| − | | {{tt|__cpp_lib_sample}}
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| − | | 201603L
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| − | | {{header|algorithm}}
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| − | | {{tt|__cpp_lib_scoped_lock}}
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| − | | 201703L
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| − | | {{header|mutex}}
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| − | | {{tt|__cpp_lib_semaphore}}
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| − | | {{header|semaphore}}
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| − | | {{tt|__cpp_lib_shared_mutex}}
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| − | | 201505L
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| − | | {{header|shared_mutex}}
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| − | | {{tt|__cpp_lib_shared_ptr_arrays}}
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| − | | 201707L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_shared_ptr_weak_type}}
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| − | | 201606L
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| − | | {{header|memory}}
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| − | | {{tt|__cpp_lib_shared_timed_mutex}}
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| − | | 201402L
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| − | | {{header|shared_mutex}}
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| − | | {{tt|__cpp_lib_shift}}
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| − | | 201806L
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| − | | {{header|algorithm}}
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| − | | {{tt|__cpp_lib_smart_ptr_for_overwrite}}
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| − | | 201811L
| + | |
| − | | {{header|memory}}
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| − | |-
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| − | | {{tt|__cpp_lib_source_location}}
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| − | | 201907L
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| − | | {{header|source_location}}
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| − | | {{tt|__cpp_lib_span}}
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| − | | 202002L
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| − | | {{header|span}}
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| − | |-
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| − | | {{tt|__cpp_lib_ssize}}
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| − | | 201902L
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| − | | {{header|iterator}}
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| − | |-
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| − | | {{tt|__cpp_lib_starts_ends_with}}
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| − | | 201711L
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| − | | {{header|string}} {{header|string_view}}
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| − | |-
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| − | | {{tt|__cpp_lib_string_udls}}
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| − | | 201304L
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| − | | {{header|string}}
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| − | |-
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| − | | {{tt|__cpp_lib_string_view}}
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| − | | 201803L
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| − | | {{header|string}} {{header|string_view}}
| + | |
| − | |-
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| − | | {{tt|__cpp_lib_syncbuf}}
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| − | | 201803L
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| − | | 201907L
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| − | | 201711L
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| − | | 201907L
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| − | | {{header|array}}
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| − | |-
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| − | | 201611L
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| − | |-
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| − | | 201304L
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| − | | 201510L
| + | |
| − | | {{header|memory}} {{header|functional}}
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| − | |-
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| − | | {{tt|__cpp_lib_tuple_element_t}}
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| − | | 201402L
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| − | | {{header|tuple}}
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| − | |-
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| − | | {{tt|__cpp_lib_variant}}
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| − | | {{header|variant}}
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| − | |-
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| − | | {{tt|__cpp_lib_void_t}}
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| − | | 201411L
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| − | | {{header|type_traits}}
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| − | |}
| + | |
| | | | |
| | ===See also=== | | ===See also=== |
| | {{dsc begin}} | | {{dsc begin}} |
| − | {{dsc | [[cpp/feature_test|'''Feature testing''']] {{mark c++20}} | A set of preprocessor macros to test the corresponding to C++ language and library features }} | + | {{dsc|[[cpp/feature_test|'''Feature testing''']] {{mark c++20}}|A set of preprocessor macros to test the corresponding to C++ language and library features}} |
| | + | {{dsc see cpp|cpp/freestanding#Requirements on standard library headers|Headers required for a freestanding implementation|nomono=true}} |
| | + | {{dsc see cpp|cpp/preprocessor/replace#Predefined macros|Predefined Macro Symbols|nomono=true}} |
| | {{dsc end}} | | {{dsc end}} |
| | | | |
| | {{langlinks|es|ja|ru|zh}} | | {{langlinks|es|ja|ru|zh}} |
