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boost::none is constexpr-declared

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Andrzej Krzemienski
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doc/21_ref_none.qbk
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@ -17,8 +17,8 @@ namespace boost {
class none_t {/* see below */}; class none_t {/* see below */};
const none_t none (/* see below */); inline constexpr none_t none (/* see below */);
} // namespace boost } // namespace boost
``` ```

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@ -11,18 +11,24 @@
[section:relnotes Release Notes] [section:relnotes Release Notes]
[heading Boost Release 1.75]
* `boost::none` is `constexpr`-declared.
* Fixed [@https://github.com/boostorg/optional/issues/78 issue #78].
[heading Boost Release 1.73] [heading Boost Release 1.73]
* Fixed [@https://github.com/boostorg/optional/issues/78 issue #78]. * Fixed [@https://github.com/boostorg/optional/issues/78 issue #78].
* `boost::none` is now declared as an inline variable (on compilers taht support it): there is only one instance of `boost::none` across all translation units. * `boost::none` is now declared as an inline variable (on compilers taht support it): there is only one instance of `boost::none` across all translation units.
* Fixed a number of compilation errors in GCC 4.4.7 in `optional<T>` for trivial `T`s. Thanks to Robert Leahy for the fix. For details see [@https://github.com/boostorg/optional/pull/80 pr #78]. * Fixed a number of compilation errors in GCC 4.4.7 in `optional<T>` for trivial `T`s. Thanks to Robert Leahy for the fix. For details see [@https://github.com/boostorg/optional/pull/80 pr #78].
* Now surpressing warning `-Wweak-vtables`. * Now surpressing warning `-Wweak-vtables`.
[heading Boost Release 1.69] [heading Boost Release 1.69]
* Remove deprecation mark from `reset()` method (without arguments). * Remove deprecation mark from `reset()` method (without arguments).
* Fixed [@https://github.com/boostorg/optional/issues/59 issue #59]. * Fixed [@https://github.com/boostorg/optional/issues/59 issue #59].
* Fixed bug with initialization of certain wrapper types in clang with -std=c++03. See [@https://github.com/boostorg/optional/pull/64 pr #64]. * Fixed bug with initialization of certain wrapper types in clang with -std=c++03. See [@https://github.com/boostorg/optional/pull/64 pr #64].
[heading Boost Release 1.68] [heading Boost Release 1.68]

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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Detailed Semantics - Free Functions</title> <title>Detailed Semantics - Free Functions</title>
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<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Detailed Semantics - Optional References</title> <title>Detailed Semantics - Optional References</title>
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@ -538,7 +538,7 @@
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Detailed Semantics - Optional Values</title> <title>Detailed Semantics - Optional Values</title>
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@ -1774,7 +1774,7 @@
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Initialization tags</title> <title>Initialization tags</title>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Optional References</title> <title>Optional References</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -104,7 +104,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Optional Values</title> <title>Optional Values</title>
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<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Header &lt;boost/optional/optional_io.hpp&gt;</title> <title>Header &lt;boost/optional/optional_io.hpp&gt;</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -58,7 +58,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

14
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Detailed semantics</title> <title>Detailed semantics</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -32,7 +32,7 @@
<span class="special">&lt;</span><span class="keyword">class</span> <span class="special">&lt;</span><span class="keyword">class</span>
<span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharType</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code> <span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code>
<br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code> <br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span> <br>     <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code> <br>     <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span>
<span class="identifier">out</span><span class="special">,</span> <span class="identifier">out</span><span class="special">,</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">);</span></code> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">);</span></code>
</p> </p>
@ -53,8 +53,8 @@
</p> </p>
<p> <p>
<code class="computeroutput"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span> <code class="computeroutput"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code> <br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code> <br>     <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code>
<br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span> <span class="identifier">out</span><span class="special">,</span> <span class="identifier">none_t</span><span class="special">);</span></code> <br>     <code class="computeroutput"><span class="keyword">operator</span><span class="special">&lt;&lt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span> <span class="identifier">out</span><span class="special">,</span> <span class="identifier">none_t</span><span class="special">);</span></code>
</p> </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"> <li class="listitem">
@ -70,8 +70,8 @@
</p> </p>
<p> <p>
<code class="computeroutput"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span> <code class="computeroutput"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">CharType</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">CharTrait</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code> <br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code> <span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span></code> <br>     <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_ostream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span></code>
<br> &#160;&#160;&#160;&#160;<code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;&gt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span> <span class="identifier">in</span><span class="special">,</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">v</span><span class="special">);</span></code> <br>     <code class="computeroutput"><span class="keyword">operator</span><span class="special">&gt;&gt;(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span><span class="identifier">CharType</span><span class="special">,</span> <span class="identifier">CharTrait</span><span class="special">&gt;&amp;</span> <span class="identifier">in</span><span class="special">,</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;&amp;</span> <span class="identifier">v</span><span class="special">);</span></code>
</p> </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"> <li class="listitem">
@ -98,7 +98,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

42
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Release Notes</title> <title>Release Notes</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -28,6 +28,20 @@
</h2></div></div></div> </h2></div></div></div>
<h4> <h4>
<a name="boost_optional.relnotes.h0"></a> <a name="boost_optional.relnotes.h0"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_75"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_75">Boost
Release 1.75</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">none</span></code> is <code class="computeroutput"><span class="keyword">constexpr</span></code>-declared.
</li>
<li class="listitem">
Fixed <a href="https://github.com/boostorg/optional/issues/78" target="_top">issue
#78</a>.
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h1"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_73"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_73">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_73"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_73">Boost
Release 1.73</a> Release 1.73</a>
</h4> </h4>
@ -50,7 +64,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h1"></a> <a name="boost_optional.relnotes.h2"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_69"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_69">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_69"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_69">Boost
Release 1.69</a> Release 1.69</a>
</h4> </h4>
@ -68,7 +82,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h2"></a> <a name="boost_optional.relnotes.h3"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_68"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_68">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_68"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_68">Boost
Release 1.68</a> Release 1.68</a>
</h4> </h4>
@ -85,7 +99,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h3"></a> <a name="boost_optional.relnotes.h4"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_67"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_67">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_67"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_67">Boost
Release 1.67</a> Release 1.67</a>
</h4> </h4>
@ -99,7 +113,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h4"></a> <a name="boost_optional.relnotes.h5"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_66"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_66">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_66"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_66">Boost
Release 1.66</a> Release 1.66</a>
</h4> </h4>
@ -117,7 +131,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h5"></a> <a name="boost_optional.relnotes.h6"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_63"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_63">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_63"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_63">Boost
Release 1.63</a> Release 1.63</a>
</h4> </h4>
@ -141,7 +155,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h6"></a> <a name="boost_optional.relnotes.h7"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_62"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_62">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_62"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_62">Boost
Release 1.62</a> Release 1.62</a>
</h4> </h4>
@ -149,7 +163,7 @@
Fixed <a href="https://svn.boost.org/trac/boost/ticket/12179" target="_top">Trac #12179</a>. Fixed <a href="https://svn.boost.org/trac/boost/ticket/12179" target="_top">Trac #12179</a>.
</li></ul></div> </li></ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h7"></a> <a name="boost_optional.relnotes.h8"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_61"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_61">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_61"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_61">Boost
Release 1.61</a> Release 1.61</a>
</h4> </h4>
@ -192,7 +206,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h8"></a> <a name="boost_optional.relnotes.h9"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_60"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_60">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_60"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_60">Boost
Release 1.60</a> Release 1.60</a>
</h4> </h4>
@ -203,7 +217,7 @@
#11203</a>. #11203</a>.
</li></ul></div> </li></ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h9"></a> <a name="boost_optional.relnotes.h10"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_59"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_59">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_59"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_59">Boost
Release 1.59</a> Release 1.59</a>
</h4> </h4>
@ -217,7 +231,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h10"></a> <a name="boost_optional.relnotes.h11"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_58"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_58">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_58"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_58">Boost
Release 1.58</a> Release 1.58</a>
</h4> </h4>
@ -253,7 +267,7 @@
</li> </li>
</ul></div> </ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h11"></a> <a name="boost_optional.relnotes.h12"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_57"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_57">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_57"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_57">Boost
Release 1.57</a> Release 1.57</a>
</h4> </h4>
@ -263,7 +277,7 @@
to fix C++03 compile error on <code class="computeroutput"><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"..."</span><span class="special">)</span></code>"</em></span>. to fix C++03 compile error on <code class="computeroutput"><span class="identifier">logic_error</span><span class="special">(</span><span class="string">"..."</span><span class="special">)</span></code>"</em></span>.
</li></ul></div> </li></ul></div>
<h4> <h4>
<a name="boost_optional.relnotes.h12"></a> <a name="boost_optional.relnotes.h13"></a>
<span class="phrase"><a name="boost_optional.relnotes.boost_release_1_56"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_56">Boost <span class="phrase"><a name="boost_optional.relnotes.boost_release_1_56"></a></span><a class="link" href="relnotes.html#boost_optional.relnotes.boost_release_1_56">Boost
Release 1.56</a> Release 1.56</a>
</h4> </h4>
@ -320,7 +334,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

12
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Design Overview</title> <title>Design Overview</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -65,8 +65,8 @@
<code class="computeroutput"><span class="identifier">npos</span></code>, -1, etc... This is <code class="computeroutput"><span class="identifier">npos</span></code>, -1, etc... This is
equivalent to adding the special value to the set of possible values of equivalent to adding the special value to the set of possible values of
a given type. This super set of <code class="computeroutput"><span class="identifier">T</span></code> a given type. This super set of <code class="computeroutput"><span class="identifier">T</span></code>
plus some <span class="emphasis"><em>nil_t</em></span>&#8212;where <code class="computeroutput"><span class="identifier">nil_t</span></code> plus some <span class="emphasis"><em>nil_t</em></span>—where <code class="computeroutput"><span class="identifier">nil_t</span></code>
is some stateless POD&#8212;can be modeled in modern languages as a <span class="bold"><strong>discriminated union</strong></span> of T and nil_t. Discriminated is some stateless POD—can be modeled in modern languages as a <span class="bold"><strong>discriminated union</strong></span> of T and nil_t. Discriminated
unions are often called <span class="emphasis"><em>variants</em></span>. A variant has a unions are often called <span class="emphasis"><em>variants</em></span>. A variant has a
<span class="emphasis"><em>current type</em></span>, which in our case is either <code class="computeroutput"><span class="identifier">T</span></code> or <code class="computeroutput"><span class="identifier">nil_t</span></code>. <span class="emphasis"><em>current type</em></span>, which in our case is either <code class="computeroutput"><span class="identifier">T</span></code> or <code class="computeroutput"><span class="identifier">nil_t</span></code>.
Using the <a href="../../../../../variant/index.html" target="_top">Boost.Variant</a> Using the <a href="../../../../../variant/index.html" target="_top">Boost.Variant</a>
@ -100,8 +100,8 @@
</p> </p>
<p> <p>
In any event, both the discriminated-union or the single-element container In any event, both the discriminated-union or the single-element container
models serve as a conceptual ground for a class representing optional&#8212;i.e. models serve as a conceptual ground for a class representing optional—i.e.
possibly uninitialized&#8212;objects. For instance, these models show the possibly uninitialized—objects. For instance, these models show the
<span class="emphasis"><em>exact</em></span> semantics required for a wrapper of optional <span class="emphasis"><em>exact</em></span> semantics required for a wrapper of optional
values: values:
</p> </p>
@ -170,7 +170,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

8
doc/html/boost_optional/tutorial/design_overview/the_interface.html
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>The Interface</title> <title>The Interface</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -79,7 +79,7 @@
facto</em></span> standard for handling optional objects because all you facto</em></span> standard for handling optional objects because all you
have to do to refer to a value which you don't really have is to use a have to do to refer to a value which you don't really have is to use a
null pointer value of the appropriate type. Pointers have been used for null pointer value of the appropriate type. Pointers have been used for
decades&#8212;from the days of C APIs to modern C++ libraries&#8212;to <span class="emphasis"><em>refer</em></span> decades—from the days of C APIs to modern C++ libraries—to <span class="emphasis"><em>refer</em></span>
to optional (that is, possibly nonexistent) objects; particularly as optional to optional (that is, possibly nonexistent) objects; particularly as optional
arguments to a function, but also quite often as optional data members. arguments to a function, but also quite often as optional data members.
</p> </p>
@ -93,7 +93,7 @@
and this information is tied to the <span class="emphasis"><em>syntax</em></span> of the and this information is tied to the <span class="emphasis"><em>syntax</em></span> of the
expressions. That is, the presence of operators <code class="computeroutput"><span class="special">*</span></code> expressions. That is, the presence of operators <code class="computeroutput"><span class="special">*</span></code>
and <code class="computeroutput"><span class="special">-&gt;</span></code> tell by themselves and <code class="computeroutput"><span class="special">-&gt;</span></code> tell by themselves
&#8212;without any additional context&#8212; that the expression will be undefined —without any additional context— that the expression will be undefined
unless the implied pointee actually exist. unless the implied pointee actually exist.
</p> </p>
<p> <p>
@ -173,7 +173,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>The semantics</title> <title>The semantics</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -107,7 +107,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
doc/html/boost_optional/tutorial/exception_safety_guarantees.html
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Exception Safety Guarantees</title> <title>Exception Safety Guarantees</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -161,7 +161,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

6
doc/html/boost_optional/tutorial/gotchas.html
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Gotchas</title> <title>Gotchas</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -37,7 +37,7 @@
</p> </p>
<p> <p>
First, it is functionally similar to a tristate boolean (false, maybe, First, it is functionally similar to a tristate boolean (false, maybe,
true) &#8212;such as <a href="../../../../../../doc/html/tribool.html" target="_top">boost::tribool</a>&#8212; true) —such as <a href="../../../../../../doc/html/tribool.html" target="_top">boost::tribool</a>—
except that in a tristate boolean, the maybe state <span class="underline">represents except that in a tristate boolean, the maybe state <span class="underline">represents
a valid value</span>, unlike the corresponding state of an uninitialized a valid value</span>, unlike the corresponding state of an uninitialized
<code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">bool</span><span class="special">&gt;</span></code>. <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">bool</span><span class="special">&gt;</span></code>.
@ -98,7 +98,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
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@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>False positive with -Wmaybe-uninitialized</title> <title>False positive with -Wmaybe-uninitialized</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -63,7 +63,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
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<title>Performance considerations</title> <title>Performance considerations</title>
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

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<head> <head>
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
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<head> <head>
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<title>Type requirements</title> <title>Type requirements</title>
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>When to use Optional</title> <title>When to use Optional</title>
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Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Boost.Optional</title> <title>Boost.Optional</title>
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@ -25,8 +25,8 @@
<div><div class="author"><h3 class="author"> <div><div class="author"><h3 class="author">
<span class="firstname">Fernando Luis</span> <span class="surname">Cacciola Carballal</span> <span class="firstname">Fernando Luis</span> <span class="surname">Cacciola Carballal</span>
</h3></div></div> </h3></div></div>
<div><p class="copyright">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal</p></div> <div><p class="copyright">Copyright © 2003-2007 Fernando Luis Cacciola Carballal</p></div>
<div><p class="copyright">Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski</p></div> <div><p class="copyright">Copyright © 2014-2018 Andrzej Krzemieński</p></div>
<div><div class="legalnotice"> <div><div class="legalnotice">
<a name="optional.legal"></a><p> <a name="optional.legal"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
@ -145,7 +145,7 @@
</div> </div>
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: April 08, 2020 at 23:09:18 GMT</small></p></td> <td align="left"><p><small>Last revised: October 24, 2020 at 15:15:55 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td> <td align="right"><div class="copyright-footer"></div></td>
</tr></table> </tr></table>
<hr> <hr>

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<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Reference</title> <title>Reference</title>
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<span class="keyword">class</span> <span class="identifier">none_t</span> <span class="special">{/*</span> <span class="identifier">see</span> <span class="identifier">below</span> <span class="special">*/};</span> <span class="keyword">class</span> <span class="identifier">none_t</span> <span class="special">{/*</span> <span class="identifier">see</span> <span class="identifier">below</span> <span class="special">*/};</span>
<span class="keyword">const</span> <span class="identifier">none_t</span> <span class="identifier">none</span> <span class="special">(/*</span> <span class="identifier">see</span> <span class="identifier">below</span> <span class="special">*/);</span> <span class="keyword">inline</span> <span class="keyword">constexpr</span> <span class="identifier">none_t</span> <span class="identifier">none</span> <span class="special">(/*</span> <span class="identifier">see</span> <span class="identifier">below</span> <span class="special">*/);</span>
<span class="special">}</span> <span class="comment">// namespace boost</span> <span class="special">}</span> <span class="comment">// namespace boost</span>
</pre> </pre>
@ -75,7 +75,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

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<title>Header &lt;boost/optional/optional.hpp&gt;</title> <title>Header &lt;boost/optional/optional.hpp&gt;</title>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

4
doc/html/optional/tutorial.html
View File

@ -1,6 +1,6 @@
<html> <html>
<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Tutorial</title> <title>Tutorial</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
@ -139,7 +139,7 @@
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td> <td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski<p> <td align="right"><div class="copyright-footer">Copyright © 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright © 2014-2018 Andrzej Krzemieński<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>

7
include/boost/none.hpp
View File

@ -24,7 +24,7 @@ namespace boost {
#ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE #ifdef BOOST_OPTIONAL_USE_OLD_DEFINITION_OF_NONE
BOOST_INLINE_VARIABLE none_t const none = (static_cast<none_t>(0)) ; BOOST_INLINE_VARIABLE none_t BOOST_CONSTEXPR_OR_CONST none = (static_cast<none_t>(0)) ;
#elif defined BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE #elif defined BOOST_OPTIONAL_USE_SINGLETON_DEFINITION_OF_NONE
@ -45,16 +45,15 @@ namespace detail { namespace optional_detail {
namespace { namespace {
// TU-local // TU-local
const none_t& none = detail::optional_detail::none_instance<none_t>::instance; const none_t& none = detail::optional_detail::none_instance<none_t>::instance;
} }
#else #else
BOOST_INLINE_VARIABLE const none_t none ((none_t::init_tag())); BOOST_INLINE_VARIABLE BOOST_CONSTEXPR_OR_CONST none_t none ((none_t::init_tag()));
#endif // older definitions #endif // older definitions
} // namespace boost } // namespace boost
#endif // header guard #endif // header guard