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FeatureTestMacroTable.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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<title>Feature Test Macro Support — libc++ 11.0 documentation</title>
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<div class="header" role="banner"><h1 class="heading"><a href="index.html">
<span>libc++ 11.0 documentation</span></a></h1>
<h2 class="heading"><span>Feature Test Macro Support</span></h2>
</div>
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<div class="content">
<div class="section" id="feature-test-macro-support">
<span id="featuretestmacrotable"></span><h1>Feature Test Macro Support<a class="headerlink" href="#feature-test-macro-support" title="Permalink to this headline">¶</a></h1>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#overview" id="id2">Overview</a></li>
<li><a class="reference internal" href="#status" id="id3">Status</a></li>
</ul>
</div>
<div class="section" id="overview">
<h2><a class="toc-backref" href="#id2">Overview</a><a class="headerlink" href="#overview" title="Permalink to this headline">¶</a></h2>
<p>This file documents the feature test macros currently supported by libc++.</p>
</div>
<div class="section" id="status">
<span id="feature-status"></span><h2><a class="toc-backref" href="#id3">Status</a><a class="headerlink" href="#status" title="Permalink to this headline">¶</a></h2>
<table border="1" class="docutils" id="id1">
<caption><span class="caption-text">Current Status
:name: feature-status-table
:widths: auto</span><a class="headerlink" href="#id1" title="Permalink to this table">¶</a></caption>
<colgroup>
<col width="74%" />
<col width="26%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Macro Name</th>
<th class="head">Value</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td colspan="2"><strong>C++ 14</strong></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_chrono_udls</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_complex_udls</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201309L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_exchange_function</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_generic_associative_lookup</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_integer_sequence</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_integral_constant_callable</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_final</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201402L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_null_pointer</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201309L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_make_reverse_iterator</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201402L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_make_unique</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_null_iterators</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_quoted_string_io</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_result_of_sfinae</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201210L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_robust_nonmodifying_seq_ops</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_shared_timed_mutex</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201402L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_string_udls</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_transformation_trait_aliases</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_transparent_operators</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201210L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_tuple_element_t</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201402L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_tuples_by_type</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201304L</span></code></td>
</tr>
<tr class="row-odd"><td colspan="2"><strong>C++ 17</strong></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_addressof_constexpr</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_allocator_traits_is_always_equal</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_any</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_apply</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_array_constexpr</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_as_const</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201510L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_atomic_is_always_lock_free</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_bool_constant</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201505L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_boyer_moore_searcher</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_byte</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_chrono</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201611L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_clamp</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_enable_shared_from_this</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_execution</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_filesystem</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201703L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_gcd_lcm</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_hardware_interference_size</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201703L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_has_unique_object_representations</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_hypot</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_incomplete_container_elements</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201505L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_invoke</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_aggregate</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201703L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_invocable</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201703L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_swappable</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_launder</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_logical_traits</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201510L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_make_from_tuple</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_map_try_emplace</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_math_special_functions</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_memory_resource</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_node_extract</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_nonmember_container_access</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_not_fn</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_optional</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_parallel_algorithm</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_raw_memory_algorithms</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_sample</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201603L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_scoped_lock</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201703L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_shared_mutex</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201505L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_shared_ptr_arrays</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_shared_ptr_weak_type</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_string_view</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_to_chars</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_transparent_operators</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201510L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_type_trait_variable_templates</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201510L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_uncaught_exceptions</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_unordered_map_try_emplace</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_variant</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201606L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_void_t</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201411L</span></code></td>
</tr>
<tr class="row-odd"><td colspan="2"><strong>C++ 2a</strong></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_atomic_ref</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_bind_front</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_bit_cast</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_char8_t</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201811L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_concepts</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_constexpr_misc</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_constexpr_swap_algorithms</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_destroying_delete</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201806L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_endian</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201907L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_erase_if</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201811L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_generic_unordered_lookup</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_interpolate</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201902L</span></code></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_is_constant_evaluated</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201811L</span></code></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_list_remove_return_type</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_ranges</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-odd"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_three_way_comparison</span></code></td>
<td><em>unimplemented</em></td>
</tr>
<tr class="row-even"><td><code class="docutils literal notranslate"><span class="pre">__cpp_lib_to_array</span></code></td>
<td><code class="docutils literal notranslate"><span class="pre">201907L</span></code></td>
</tr>
</tbody>
</table>
</div>
</div>
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