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Document C++20 macros.
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jzmaddock
@@ -45,6 +45,8 @@
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that describe C++17 features not supported</a></span></dt>
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<dt><span class="section"><a href="boost_macro_reference.html#boost_config.boost_macro_reference.macros_that_allow_use_of_c__17_features_with_c__14_or_earlier_compilers">Macros
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that allow use of C++17 features with C++14 or earlier compilers</a></span></dt>
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<dt><span class="section"><a href="boost_macro_reference.html#boost_config.boost_macro_reference.macros_that_describe_c__20_features_not_supported">Macros
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that describe C++20 features not supported</a></span></dt>
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<dt><span class="section"><a href="boost_macro_reference.html#boost_config.boost_macro_reference.macros_that_describe_features_that_have_been_removed_from_the_standard_">Macros
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that describe features that have been removed from the standard.</a></span></dt>
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<dt><span class="section"><a href="boost_macro_reference.html#boost_config.boost_macro_reference.boost_helper_macros">Boost
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@@ -4125,6 +4127,204 @@
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_config.boost_macro_reference.macros_that_describe_c__20_features_not_supported"></a><a class="link" href="boost_macro_reference.html#boost_config.boost_macro_reference.macros_that_describe_c__20_features_not_supported" title="Macros that describe C++20 features not supported">Macros
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that describe C++20 features not supported</a>
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</h3></div></div></div>
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<p>
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The following macros describe features in the 2020 ISO C++ standard, formerly
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known as C++2a, that are not yet supported by a particular compiler or library.
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</p>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Macro
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_BARRIER</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">barrier</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_FORMAT</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">format</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_SOURCE_LOCATION</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">format</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_BIT</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">bit</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_LATCH</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">latch</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_SPAN</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">span</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_COMPARE</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">compare</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_NUMBERS</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">numbers</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_STOP_TOKEN</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">stop_token</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_CONCEPTS</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">concepts</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_RANGES</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">range</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_SYNCSTREAM</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">syncstream</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_COROUTINE</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">coroutine</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX20_HDR_SEMAPHORE</span></code>
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</p>
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</td>
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<td>
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<p>
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The compiler does not support the header <code class="computeroutput"><span class="special"><</span><span class="identifier">semaphore</span><span class="special">></span></code>.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="boost_config.boost_macro_reference.macros_that_describe_features_that_have_been_removed_from_the_standard_"></a><a class="link" href="boost_macro_reference.html#boost_config.boost_macro_reference.macros_that_describe_features_that_have_been_removed_from_the_standard_" title="Macros that describe features that have been removed from the standard.">Macros
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that describe features that have been removed from the standard.</a>
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</h3></div></div></div>
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@@ -4205,6 +4405,19 @@
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_ATOMIC_SMART_PTR</span></code>
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</p>
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</td>
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<td>
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<p>
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The standard library no longer supports atomic overloads for <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">shared_ptr</span></code>: use <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">atomic</span><span class="special"><</span><span class="identifier">shared_ptr</span><span class="special"><</span><span class="identifier">T</span><span class="special">>></span></code>
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instead.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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