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2
doc/00_optional.qbk
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@ -2,7 +2,7 @@
[quickbook 1.4]
[authors [Cacciola Carballal, Fernando Luis]]
[copyright 2003-2007 Fernando Luis Cacciola Carballal]
[copyright 2014-2017 Andrzej Krzemieński]
[copyright 2014-2018 Andrzej Krzemieński]
[category miscellaneous]
[id optional]
[dirname optional]

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doc/27_ref_optional_synopsis.qbk
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@ -179,9 +179,19 @@ They are empty, trivially copyable classes with disabled default constructor.
template<class F> T value_or_eval( F f ) const& ; ``[link reference_optional_value_or_call __GO_TO__]``
template<class F> T value_or_eval( F f ) && ; ``[link reference_optional_value_or_call_move __GO_TO__]``
template<class F> auto map( F f ) const& -> ``['see below]``; ``[link reference_optional_map __GO_TO__]``
template<class F> auto map( F f ) & -> ``['see below]``; ``[link reference_optional_map __GO_TO__]``
template<class F> auto map( F f ) && -> ``['see below]``; ``[link reference_optional_map_move __GO_TO__]``
template<class F> auto flat_map( F f ) const& -> ``['see below]``; ``[link reference_optional_flat_map __GO_TO__]``
template<class F> auto flat_map( F f ) & -> ``['see below]``; ``[link reference_optional_flat_map __GO_TO__]``
template<class F> auto flat_map( F f ) && -> ``['see below]``; ``[link reference_optional_flat_map_move __GO_TO__]``
T const* get_ptr() const ; ``[link reference_optional_get_ptr __GO_TO__]``
T* get_ptr() ; ``[link reference_optional_get_ptr __GO_TO__]``
bool has_value() const noexcept ; ``[link reference_optional_operator_bool __GO_TO__]``
explicit operator bool() const noexcept ; ``[link reference_optional_operator_bool __GO_TO__]``
bool operator!() const noexcept ; ``[link reference_optional_operator_not __GO_TO__]``
@ -234,7 +244,6 @@ They are empty, trivially copyable classes with disabled default constructor.
optional& operator = ( none_t ) noexcept ; ``[link reference_optional_ref_assign_none_t __GO_TO__]``
optional& operator = ( optional const& rhs ) noexcept; ``[link reference_optional_ref_copy_assign __GO_TO__]``
template<class U> optional& operator = ( optional<U&> const& rhs ) noexcept ; ``[link reference_optional_ref_assign_optional_U __GO_TO__]``
@ -254,8 +263,14 @@ They are empty, trivially copyable classes with disabled default constructor.
template<class F> T& value_or_eval( F f ) const ; ``[link reference_optional_ref_value_or_eval __GO_TO__]``
template<class F> auto map( F f ) const -> ``['see below]``; ``[link reference_optional_ref_map __GO_TO__]``
template<class F> auto flat_map( F f ) const -> ``['see below]``; ``[link reference_optional_ref_flat_map __GO_TO__]``
T* get_ptr() const noexcept ; ``[link reference_optional_ref_get_ptr __GO_TO__]``
bool has_value() const noexcept ; ``[link reference_optional_ref_operator_bool __GO_TO__]``
explicit operator bool() const noexcept ; ``[link reference_optional_ref_operator_bool __GO_TO__]``
bool operator!() const noexcept ; ``[link reference_optional_ref_operator_not __GO_TO__]``

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doc/28_ref_optional_semantics.qbk
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@ -685,6 +685,65 @@ __SPACE__
__SPACE__
[#reference_optional_map]
[: `template<class F> auto optional<T>::map(F f) const& -> `['see below]` ;`]
[: `template<class F> auto optional<T>::map(F f) & -> `['see below]` ;`]
* [*Effects:] `if (*this) return f(**this); else return none;`
* [*Notes:] The return type of these overloads is `optional<decltype(f(**this))>`. On compilers that do not support ref-qualifiers on member functions, these two (as well as the next one) overloads are replaced with good old const and non-const overloads.
* [*Example:]
``
auto length = [](const string& s){ return s.size(); };
optional<string> o1 {}, o2 {"cat"};
optional<size_t> os1 = o1.map(length), os2 = o2.map(length);
assert ( !os1 ) ;
assert ( os2 ) ;
assert ( *os2 == 3 ) ;
``
__SPACE__
[#reference_optional_map_move]
[: `template<class F> auto optional<T>::map(F f) && -> `['see below]` ;`]
* [*Effects:] `if (*this) return f(std::move(**this)); else return none;`
* [*Notes:] The return type of this overload is `optional<decltype(f(istd::move(**this)))>`.
__SPACE__
[#reference_optional_flat_map]
[: `template<class F> auto optional<T>::flat_map(F f) const& -> `['see below]` ;`]
[: `template<class F> auto optional<T>::flat_map(F f) & -> `['see below]` ;`]
* [*Requires:] The return type of expression `f(**this)` is `optional<U>` for some object or reference type `U`.
* [*Effects:] `if (*this) return f(**this); else return none;`
* [*Notes:] The return type of these overloads is `optional<U>`. On compilers that do not support ref-qualifiers on member functions, these two (as well as the next one) overloads are replaced with good old const and non-const overloads.
* [*Example:]
``
optional<char> first_char(const string& s) {
return s.empty() ? none : optional<char>(s[0]);
};
optional<string> o1 {}, o2 {"cat"};
optional<char> os1 = o1.flat_map(first_char), os2 = o2.flat_map(first_char);
assert ( !os1 ) ;
assert ( os2 ) ;
assert ( *os2 == 'c' ) ;
``
__SPACE__
[#reference_optional_flat_map_move]
[: `template<class F> auto optional<T>::flat_map(F f) && -> `['see below]` ;`]
* [*Requires:] The return type of expression `f(std::move(**this))` is `optional<U>` for some object or reference type `U`.
* [*Effects:] `if (*this) return f(std::move(**this)); else return none;`
* [*Notes:] The return type of this overload is `optional<U>`.
__SPACE__
[#reference_optional_get_value_or_value]
[: `T const& optional<T>::get_value_or( T const& default) const ;`]
@ -754,6 +813,7 @@ __SPACE__
[#reference_optional_operator_bool]
[: `explicit optional<T>::operator bool() const noexcept ;`]
[: `bool optional<T>::has_value() const noexcept ;`]
* [*Returns:] `get_ptr() != 0`.
* [*Notes:] On compilers that do not support explicit conversion operators this falls back to safe-bool idiom.
@ -1033,6 +1093,21 @@ __SPACE__
__SPACE__
[#reference_optional_ref_map]
[: `template<class F> auto optional<T&>::map( F f ) const -> `['see below]`;`]
* [*Effects:] Equivalent to `if (*this) return f(**this); else return none;`.
* [*Remarks:] The return type of this function is `optional<decltype(f(**this))>`.
__SPACE__
[#reference_optional_ref_flat_map]
[: `template<class F> auto optional<T&>::flat_map( F f ) const -> `['see below]`;`]
* [*Requires:] The return type of expression `f(**this)` is `optional<U>` for some object or reference type `U`.
* [*Effects:] Equivalent to `if (*this) return f(**this); else return none;`.
* [*Remarks:] The return type of this function is `optional<U>`.
__SPACE__
[#reference_optional_ref_get_ptr]
[: `T* optional<T&>::get_ptr () const noexcept;`]
* [*Returns:] `ref`.
@ -1040,6 +1115,7 @@ __SPACE__
__SPACE__
[#reference_optional_ref_operator_bool]
[: `bool has_value() const noexcept;`]
[: `optional<T&>::operator bool () const noexcept;`]
* [*Returns:] `bool(ref)`.

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@ -11,6 +11,13 @@
[section:relnotes Release Notes]
[heading Boost Release 1.68]
* Added member function `has_value()` for compatibility with `std::optional` ([@https://github.com/boostorg/optional/issues/52 issue #52]).
* Added member function `map()` for transforming `optional<T>` into `optional<U>` using a function of type `T -> U`.
* Added member function `flat_map()` for transforming `optional<T>` into `optional<U>` using a function of type `T -> optonal<U>`.
[heading Boost Release 1.67]
* Fixed [@https://github.com/boostorg/optional/issues/46 issue #46].

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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Acknowledgements</title>
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@ -116,8 +116,7 @@
</div>
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<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Dependencies and Portability</title>
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@ -77,8 +77,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -76,8 +76,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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@ -93,8 +93,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
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@ -155,8 +155,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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@ -61,8 +61,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
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@ -61,8 +61,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -80,8 +80,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
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@ -50,8 +50,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
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@ -3,7 +3,7 @@
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
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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>
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>)
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@ -3,7 +3,7 @@
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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@ -33,8 +33,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Header &lt;boost/optional/optional_fwd.hpp&gt;</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
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@ -52,8 +52,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Detailed Semantics - Free Functions</title>
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@ -507,8 +507,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

47
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Detailed Semantics - Optional References</title>
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<link rel="prev" href="detailed_semantics___optional_values.html" title="Detailed Semantics - Optional Values">
@ -407,6 +407,45 @@
is ill-formed.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_ref_map"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;::</span><span class="identifier">map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span> <span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput"><span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> Equivalent to <code class="computeroutput"><span class="keyword">if</span> <span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">);</span> <span class="keyword">else</span> <span class="keyword">return</span> <span class="identifier">none</span><span class="special">;</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Remarks:</strong></span> The return type of this function
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">decltype</span><span class="special">(</span><span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">))&gt;</span></code>.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_ref_flat_map"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;::</span><span class="identifier">flat_map</span><span class="special">(</span>
<span class="identifier">F</span> <span class="identifier">f</span>
<span class="special">)</span> <span class="keyword">const</span>
<span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput"><span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Requires:</strong></span> The return type of expression
<code class="computeroutput"><span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">)</span></code>
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>
for some object or reference type <code class="computeroutput"><span class="identifier">U</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> Equivalent to <code class="computeroutput"><span class="keyword">if</span> <span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">);</span> <span class="keyword">else</span> <span class="keyword">return</span> <span class="identifier">none</span><span class="special">;</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Remarks:</strong></span> The return type of this function
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
@ -422,6 +461,9 @@
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_ref_operator_bool"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">bool</span> <span class="identifier">has_value</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></code>
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;::</span><span class="keyword">operator</span> <span class="keyword">bool</span>
<span class="special">()</span> <span class="keyword">const</span>
<span class="keyword">noexcept</span><span class="special">;</span></code>
@ -501,8 +543,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

128
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Detailed Semantics - Optional Values</title>
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<link rel="prev" href="header_optional_optional_refs.html" title="Optional References">
@ -1471,6 +1471,126 @@
ref-qualifiers on member functions this overload is not present.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_map"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="special">-&gt;</span>
</code><span class="emphasis"><em>see below</em></span><code class="computeroutput"> <span class="special">;</span></code>
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="special">&amp;</span> <span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput">
<span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">);</span> <span class="keyword">else</span> <span class="keyword">return</span>
<span class="identifier">none</span><span class="special">;</span></code>
</li>
<li class="listitem">
<span class="bold"><strong>Notes:</strong></span> The return type of these overloads
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">decltype</span><span class="special">(</span><span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">))&gt;</span></code>.
On compilers that do not support ref-qualifiers on member functions,
these two (as well as the next one) overloads are replaced with good
old const and non-const overloads.
</li>
<li class="listitem">
<span class="bold"><strong>Example:</strong></span>
<pre class="programlisting"><span class="keyword">auto</span> <span class="identifier">length</span> <span class="special">=</span> <span class="special">[](</span><span class="keyword">const</span> <span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">s</span><span class="special">){</span> <span class="keyword">return</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">size</span><span class="special">();</span> <span class="special">};</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;</span> <span class="identifier">o1</span> <span class="special">{},</span> <span class="identifier">o2</span> <span class="special">{</span><span class="string">"cat"</span><span class="special">};</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">size_t</span><span class="special">&gt;</span> <span class="identifier">os1</span> <span class="special">=</span> <span class="identifier">o1</span><span class="special">.</span><span class="identifier">map</span><span class="special">(</span><span class="identifier">length</span><span class="special">),</span> <span class="identifier">os2</span> <span class="special">=</span> <span class="identifier">o2</span><span class="special">.</span><span class="identifier">map</span><span class="special">(</span><span class="identifier">length</span><span class="special">);</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="special">!</span><span class="identifier">os1</span> <span class="special">)</span> <span class="special">;</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="identifier">os2</span> <span class="special">)</span> <span class="special">;</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="special">*</span><span class="identifier">os2</span> <span class="special">==</span> <span class="number">3</span> <span class="special">)</span> <span class="special">;</span>
</pre>
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_map_move"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="special">&amp;&amp;</span>
<span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput">
<span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(**</span><span class="keyword">this</span><span class="special">));</span> <span class="keyword">else</span> <span class="keyword">return</span>
<span class="identifier">none</span><span class="special">;</span></code>
</li>
<li class="listitem">
<span class="bold"><strong>Notes:</strong></span> The return type of this overload
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">decltype</span><span class="special">(</span><span class="identifier">f</span><span class="special">(</span><span class="identifier">istd</span><span class="special">::</span><span class="identifier">move</span><span class="special">(**</span><span class="keyword">this</span><span class="special">)))&gt;</span></code>.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
<a name="reference_optional_flat_map"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">flat_map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="special">-&gt;</span>
</code><span class="emphasis"><em>see below</em></span><code class="computeroutput"> <span class="special">;</span></code>
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">flat_map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="special">&amp;</span> <span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput">
<span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Requires:</strong></span> The return type of expression
<code class="computeroutput"><span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">)</span></code>
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>
for some object or reference type <code class="computeroutput"><span class="identifier">U</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(**</span><span class="keyword">this</span><span class="special">);</span> <span class="keyword">else</span> <span class="keyword">return</span>
<span class="identifier">none</span><span class="special">;</span></code>
</li>
<li class="listitem">
<span class="bold"><strong>Notes:</strong></span> The return type of these overloads
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>.
On compilers that do not support ref-qualifiers on member functions,
these two (as well as the next one) overloads are replaced with good
old const and non-const overloads.
</li>
<li class="listitem">
<span class="bold"><strong>Example:</strong></span>
<pre class="programlisting"><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">first_char</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">string</span><span class="special">&amp;</span> <span class="identifier">s</span><span class="special">)</span> <span class="special">{</span>
<span class="keyword">return</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span> <span class="special">?</span> <span class="identifier">none</span> <span class="special">:</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;(</span><span class="identifier">s</span><span class="special">[</span><span class="number">0</span><span class="special">]);</span>
<span class="special">};</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;</span> <span class="identifier">o1</span> <span class="special">{},</span> <span class="identifier">o2</span> <span class="special">{</span><span class="string">"cat"</span><span class="special">};</span>
<span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">char</span><span class="special">&gt;</span> <span class="identifier">os1</span> <span class="special">=</span> <span class="identifier">o1</span><span class="special">.</span><span class="identifier">flat_map</span><span class="special">(</span><span class="identifier">first_char</span><span class="special">),</span> <span class="identifier">os2</span> <span class="special">=</span> <span class="identifier">o2</span><span class="special">.</span><span class="identifier">flat_map</span><span class="special">(</span><span class="identifier">first_char</span><span class="special">);</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="special">!</span><span class="identifier">os1</span> <span class="special">)</span> <span class="special">;</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="identifier">os2</span> <span class="special">)</span> <span class="special">;</span>
<span class="identifier">assert</span> <span class="special">(</span> <span class="special">*</span><span class="identifier">os2</span> <span class="special">==</span> <span class="char">'c'</span> <span class="special">)</span> <span class="special">;</span>
</pre>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</li>
</ul></div>
<a name="reference_optional_flat_map_move"></a><div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">flat_map</span><span class="special">(</span><span class="identifier">F</span> <span class="identifier">f</span><span class="special">)</span> <span class="special">&amp;&amp;</span>
<span class="special">-&gt;</span> </code><span class="emphasis"><em>see below</em></span><code class="computeroutput">
<span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Requires:</strong></span> The return type of expression
<code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(**</span><span class="keyword">this</span><span class="special">))</span></code>
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>
for some object or reference type <code class="computeroutput"><span class="identifier">U</span></code>.
</li>
<li class="listitem">
<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</span> <span class="identifier">f</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(**</span><span class="keyword">this</span><span class="special">));</span> <span class="keyword">else</span> <span class="keyword">return</span>
<span class="identifier">none</span><span class="special">;</span></code>
</li>
<li class="listitem">
<span class="bold"><strong>Notes:</strong></span> The return type of this overload
is <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>.
</li>
</ul></div>
<p>
<span class="inlinemediaobject"><img src="../../../images/space.png" alt="space"></span>
</p>
@ -1592,6 +1712,9 @@
<span class="keyword">const</span> <span class="keyword">noexcept</span>
<span class="special">;</span></code>
</p></blockquote></div>
<div class="blockquote"><blockquote class="blockquote"><p>
<code class="computeroutput"><span class="keyword">bool</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">has_value</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span></code>
</p></blockquote></div>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<span class="bold"><strong>Returns:</strong></span> <code class="computeroutput"><span class="identifier">get_ptr</span><span class="special">()</span> <span class="special">!=</span> <span class="number">0</span></code>.
@ -1651,8 +1774,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_in_place_init.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Initialization tags</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../../../optional/reference/header__boost_optional_optional_hpp_.html" title="Header &lt;boost/optional/optional.hpp&gt;">
<link rel="prev" href="../../../optional/reference/header__boost_optional_optional_hpp_.html" title="Header &lt;boost/optional/optional.hpp&gt;">
@ -47,8 +47,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

12
doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_refs.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Optional References</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../../../optional/reference/header__boost_optional_optional_hpp_.html" title="Header &lt;boost/optional/optional.hpp&gt;">
<link rel="prev" href="header_optional_optional_values.html" title="Optional Values">
@ -53,7 +53,6 @@
<span class="identifier">optional</span><span class="special">&amp;</span> <span class="keyword">operator</span> <span class="special">=</span> <span class="special">(</span> <span class="identifier">none_t</span> <span class="special">)</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_assign_none_t"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="identifier">optional</span><span class="special">&amp;</span> <span class="keyword">operator</span> <span class="special">=</span> <span class="special">(</span> <span class="identifier">optional</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">rhs</span> <span class="special">)</span> <span class="keyword">noexcept</span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_copy_assign"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">U</span><span class="special">&gt;</span> <span class="identifier">optional</span><span class="special">&amp;</span> <span class="keyword">operator</span> <span class="special">=</span> <span class="special">(</span> <span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&amp;&gt;</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">rhs</span> <span class="special">)</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_assign_optional_U"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
@ -73,8 +72,14 @@
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="identifier">T</span><span class="special">&amp;</span> <span class="identifier">value_or_eval</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_value_or_eval"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">flat_map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_flat_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="identifier">T</span><span class="special">*</span> <span class="identifier">get_ptr</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_get_ptr"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">bool</span> <span class="identifier">has_value</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_operator_bool"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">explicit</span> <span class="keyword">operator</span> <span class="keyword">bool</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_operator_bool"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">!()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_references.html#reference_optional_ref_operator_not"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
@ -100,8 +105,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

15
doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/header_optional_optional_values.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Optional Values</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../../../optional/reference/header__boost_optional_optional_hpp_.html" title="Header &lt;boost/optional/optional.hpp&gt;">
<link rel="prev" href="header_optional_in_place_init.html" title="Initialization tags">
@ -105,9 +105,19 @@
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="identifier">T</span> <span class="identifier">value_or_eval</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_value_or_call"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="identifier">T</span> <span class="identifier">value_or_eval</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="special">&amp;&amp;</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_value_or_call_move"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="special">&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="special">&amp;&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_map_move"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">flat_map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_flat_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">flat_map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="special">&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_flat_map"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">F</span><span class="special">&gt;</span> <span class="keyword">auto</span> <span class="identifier">flat_map</span><span class="special">(</span> <span class="identifier">F</span> <span class="identifier">f</span> <span class="special">)</span> <span class="special">&amp;&amp;</span> <span class="special">-&gt;</span> <span class="emphasis"><em>see below</em></span><span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_flat_map_move"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="identifier">T</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">get_ptr</span><span class="special">()</span> <span class="keyword">const</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_get_ptr"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="identifier">T</span><span class="special">*</span> <span class="identifier">get_ptr</span><span class="special">()</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_get_ptr"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">bool</span> <span class="identifier">has_value</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_operator_bool"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">explicit</span> <span class="keyword">operator</span> <span class="keyword">bool</span><span class="special">()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_operator_bool"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">!()</span> <span class="keyword">const</span> <span class="keyword">noexcept</span> <span class="special">;</span> <a class="link" href="detailed_semantics___optional_values.html#reference_optional_operator_not"><span class="inlinemediaobject"><img src="../../../images/callouts/R.png" alt="R"></span></a>
@ -130,8 +140,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/reference/io_header.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Header &lt;boost/optional/optional_io.hpp&gt;</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/reference.html" title="Reference">
<link rel="prev" href="header__boost_optional_bad_optional_access_hpp_/detailed_semantics.html" title="Detailed semantics">
@ -58,8 +58,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/reference/io_header/io_semantics.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Detailed semantics</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../io_header.html" title="Header &lt;boost/optional/optional_io.hpp&gt;">
<link rel="prev" href="../io_header.html" title="Header &lt;boost/optional/optional_io.hpp&gt;">
@ -98,8 +98,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

52
doc/html/boost_optional/relnotes.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Release Notes</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../index.html" title="Boost.Optional">
<link rel="up" href="../index.html" title="Boost.Optional">
<link rel="prev" href="dependencies_and_portability/optional_reference_binding.html" title="Optional Reference Binding">
@ -28,6 +28,37 @@
</h2></div></div></div>
<h4>
<a name="boost_optional.relnotes.h0"></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
Release 1.68</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added member function <code class="computeroutput"><span class="identifier">has_value</span><span class="special">()</span></code> for compatibility with <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">optional</span></code> (<a href="https://github.com/boostorg/optional/issues/52" target="_top">issue
#52</a>).
</li>
<li class="listitem">
Added member function <code class="computeroutput"><span class="identifier">map</span><span class="special">()</span></code> for transforming <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> into <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code> using a function of type <code class="computeroutput"><span class="identifier">T</span> <span class="special">-&gt;</span> <span class="identifier">U</span></code>.
</li>
<li class="listitem">
Added member function <code class="computeroutput"><span class="identifier">flat_map</span><span class="special">()</span></code> for transforming <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> into <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code> using a function of type <code class="computeroutput"><span class="identifier">T</span> <span class="special">-&gt;</span> <span class="identifier">optonal</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">&gt;</span></code>.
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h1"></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
Release 1.67</a>
</h4>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed <a href="https://github.com/boostorg/optional/issues/46" target="_top">issue
#46</a>.
</li>
<li class="listitem">
Fixed <code class="computeroutput"><span class="special">-</span><span class="identifier">Wzero</span><span class="special">-</span><span class="identifier">as</span><span class="special">-</span><span class="identifier">null</span><span class="special">-</span><span class="identifier">pointer</span><span class="special">-</span><span class="identifier">constant</span></code> warnings.
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h2"></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
Release 1.66</a>
</h4>
@ -45,7 +76,7 @@
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h1"></a>
<a name="boost_optional.relnotes.h3"></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
Release 1.63</a>
</h4>
@ -69,7 +100,7 @@
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h2"></a>
<a name="boost_optional.relnotes.h4"></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
Release 1.62</a>
</h4>
@ -77,7 +108,7 @@
Fixed <a href="https://svn.boost.org/trac/boost/ticket/12179" target="_top">Trac #12179</a>.
</li></ul></div>
<h4>
<a name="boost_optional.relnotes.h3"></a>
<a name="boost_optional.relnotes.h5"></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
Release 1.61</a>
</h4>
@ -120,7 +151,7 @@
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h4"></a>
<a name="boost_optional.relnotes.h6"></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
Release 1.60</a>
</h4>
@ -131,7 +162,7 @@
#11203</a>.
</li></ul></div>
<h4>
<a name="boost_optional.relnotes.h5"></a>
<a name="boost_optional.relnotes.h7"></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
Release 1.59</a>
</h4>
@ -145,7 +176,7 @@
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h6"></a>
<a name="boost_optional.relnotes.h8"></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
Release 1.58</a>
</h4>
@ -181,7 +212,7 @@
</li>
</ul></div>
<h4>
<a name="boost_optional.relnotes.h7"></a>
<a name="boost_optional.relnotes.h9"></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
Release 1.57</a>
</h4>
@ -191,7 +222,7 @@
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>.
</li></ul></div>
<h4>
<a name="boost_optional.relnotes.h8"></a>
<a name="boost_optional.relnotes.h10"></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
Release 1.56</a>
</h4>
@ -248,8 +279,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/design_overview.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Design Overview</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="../../optional/tutorial.html" title="Tutorial">
@ -170,8 +170,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/design_overview/the_interface.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>The Interface</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../design_overview.html" title="Design Overview">
<link rel="prev" href="the_semantics.html" title="The semantics">
@ -173,8 +173,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/design_overview/the_semantics.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>The semantics</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../../index.html" title="Boost.Optional">
<link rel="up" href="../design_overview.html" title="Design Overview">
<link rel="prev" href="../design_overview.html" title="Design Overview">
@ -107,8 +107,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/exception_safety_guarantees.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Exception Safety Guarantees</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="gotchas/false_positive_with__wmaybe_uninitialized.html" title="False positive with -Wmaybe-uninitialized">
@ -161,8 +161,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/gotchas.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Gotchas</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="in_place_factories.html" title="In-Place Factories">
@ -98,8 +98,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/gotchas/false_positive_with__wmaybe_uninitialized.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>False positive with -Wmaybe-uninitialized</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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<link rel="up" href="../gotchas.html" title="Gotchas">
<link rel="prev" href="mixed_relational_comparisons.html" title="Mixed relational comparisons">
@ -63,8 +63,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/gotchas/mixed_relational_comparisons.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Mixed relational comparisons</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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<link rel="prev" href="moved_from__optional_.html" title="Moved-from optional">
@ -45,8 +45,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Moved-from optional</title>
<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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@ -49,8 +49,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/in_place_factories.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>In-Place Factories</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
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<link rel="prev" href="optional_references/rebinding_semantics_for_assignment_of_optional_references.html" title="Rebinding semantics for assignment of optional references">
@ -183,8 +183,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/io_operators.html
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>IO operators</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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@ -73,8 +73,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Optional references</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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@ -103,8 +103,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Rebinding semantics for assignment of optional references</title>
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@ -133,8 +133,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

18
doc/html/boost_optional/tutorial/performance_considerations.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Performance considerations</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="type_requirements.html" title="Type requirements">
@ -56,12 +56,13 @@
<p>
We call it a <span class="emphasis"><em>direct</em></span> storage. This makes <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> a
trivially-copyable type for scalar <code class="computeroutput"><span class="identifier">T</span></code>s.
This only works for compilers that support defaulted functions. On compilers
without defaulted functions we still use the direct storage, but <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code> is
no longer recognized as trivially-copyable. Apart from scalar types, we leave
the programmer a way of customizing her type, so that it is reconized by
<code class="computeroutput"><span class="identifier">optional</span></code> as candidate for
optimized storage, by specializing type trait <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">opitonal_config</span><span class="special">::</span><span class="identifier">optional_uses_direct_storage_for</span></code>:
This only works for compilers that support defaulted functions (including
defaulted move assignment and constructor). On compilers without defaulted
functions we still use the direct storage, but <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>
is no longer recognized as trivially-copyable. Apart from scalar types, we
leave the programmer a way of customizing her type, so that it is reconized
by <code class="computeroutput"><span class="identifier">optional</span></code> as candidate
for optimized storage, by specializing type trait <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">opitonal_config</span><span class="special">::</span><span class="identifier">optional_uses_direct_storage_for</span></code>:
</p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">X</span> <span class="comment">// not trivial</span>
<span class="special">{</span>
@ -250,8 +251,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/relational_operators.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Relational operators</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="when_to_use_optional.html" title="When to use Optional">
@ -99,8 +99,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/type_requirements.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Type requirements</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="exception_safety_guarantees.html" title="Exception Safety Guarantees">
@ -95,8 +95,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/boost_optional/tutorial/when_to_use_optional.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>When to use Optional</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="design_overview/the_interface.html" title="The Interface">
@ -128,8 +128,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

7
doc/html/index.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Boost.Optional</title>
<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="index.html" title="Boost.Optional">
<link rel="next" href="boost_optional/quick_start.html" title="Quick Start">
</head>
@ -26,8 +26,7 @@
<span class="firstname">Fernando Luis</span> <span class="surname">Cacciola Carballal</span>
</h3></div></div>
<div><p class="copyright">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal</p></div>
<div><p class="copyright">Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski</p></div>
<div><p class="copyright">Copyright &#169; 2014-2018 Andrzej Krzemie&#324;ski</p></div>
<div><div class="legalnotice">
<a name="optional.legal"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
@ -146,7 +145,7 @@
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: May 17, 2017 at 23:01:39 GMT</small></p></td>
<td align="left"><p><small>Last revised: July 02, 2018 at 21:10:01 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>

5
doc/html/optional/reference.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Reference</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../index.html" title="Boost.Optional">
<link rel="up" href="../index.html" title="Boost.Optional">
<link rel="prev" href="../boost_optional/tutorial/performance_considerations.html" title="Performance considerations">
@ -75,8 +75,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/optional/reference/header__boost_optional_optional_hpp_.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Header &lt;boost/optional/optional.hpp&gt;</title>
<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../../index.html" title="Boost.Optional">
<link rel="up" href="../reference.html" title="Reference">
<link rel="prev" href="../../boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html" title="Header &lt;boost/optional/optional_fwd.hpp&gt;">
@ -97,8 +97,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

5
doc/html/optional/tutorial.html
View File

@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Tutorial</title>
<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="../index.html" title="Boost.Optional">
<link rel="up" href="../index.html" title="Boost.Optional">
<link rel="prev" href="../boost_optional/quick_start/storage_in_containers.html" title="Storage in containers">
@ -139,8 +139,7 @@
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2007 Fernando Luis Cacciola Carballal<br>Copyright &#169; 2014-2017 Andrzej
Krzemie&#324;ski<p>
<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>
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>)
</p>

12
include/boost/optional/detail/experimental_traits.hpp
View File

@ -14,10 +14,9 @@
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/predef.h>
#include <boost/type_traits.hpp>
namespace boost { namespace optional_detail {
// The condition to use POD implementation
#ifdef BOOST_OPTIONAL_CONFIG_NO_POD_SPEC
@ -40,11 +39,16 @@ namespace boost { namespace optional_detail {
# define BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
#endif
// GCC 5 or higher, or clang with libc++ or clang with libstdc++ 5 or higher
#if __cplusplus >= 201103L
# if BOOST_WORKAROUND(BOOST_GCC, >= 50000)
# define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS
# elif (defined BOOST_CLANG)
# define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS
# if BOOST_LIB_STD_CXX > 0
# define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS
# elif BOOST_LIB_STD_GNU >= 441200023 && BOOST_LIB_STD_GNU != 450600023 && BOOST_LIB_STD_GNU != 450600026 && BOOST_LIB_STD_GNU != 460800003 && BOOST_LIB_STD_GNU != 450400026 && BOOST_LIB_STD_GNU != 460700026
# define BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS
# endif
# endif
#endif
@ -52,10 +56,12 @@ namespace boost { namespace optional_detail {
#ifndef BOOST_OPTIONAL_DETAIL_USE_STD_TYPE_TRAITS
# define BOOST_OPTIONAL_DETAIL_HAS_TRIVIAL_CTOR(T) BOOST_HAS_TRIVIAL_CONSTRUCTOR(T)
#else
# include <type_traits>
# define BOOST_OPTIONAL_DETAIL_HAS_TRIVIAL_CTOR(T) std::is_trivially_default_constructible<T>::value
#endif
namespace boost { namespace optional_detail {
#ifndef BOOST_OPTIONAL_DETAIL_NO_SPEC_FOR_TRIVIAL_TYPES
template <typename T>

21
include/boost/optional/detail/optional_reference_spec.hpp
View File

@ -1,4 +1,4 @@
// Copyright (C) 2015-2016 Andrzej Krzemienski.
// Copyright (C) 2015-2018 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -159,6 +159,25 @@ public:
void reset() BOOST_NOEXCEPT { ptr_ = 0; }
bool is_initialized() const BOOST_NOEXCEPT { return ptr_ != 0; }
bool has_value() const BOOST_NOEXCEPT { return ptr_ != 0; }
template <typename F>
optional<typename boost::result_of<F(T&)>::type> map(F f) const
{
if (this->has_value())
return f(this->get());
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(T&)>::type>::type> flat_map(F f) const
{
if (this->has_value())
return f(get());
else
return none;
}
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES

110
include/boost/optional/optional.hpp
View File

@ -1,5 +1,5 @@
// Copyright (C) 2003, 2008 Fernando Luis Cacciola Carballal.
// Copyright (C) 2014 - 2017 Andrzej Krzemienski.
// Copyright (C) 2014 - 2018 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -53,6 +53,7 @@
#include <boost/move/utility.hpp>
#include <boost/none.hpp>
#include <boost/utility/compare_pointees.hpp>
#include <boost/utility/result_of.hpp>
#include <boost/optional/optional_fwd.hpp>
#include <boost/optional/detail/optional_config.hpp>
@ -375,7 +376,7 @@ class optional_base : public optional_tag
pointer_const_type get_ptr() const { return m_initialized ? get_ptr_impl() : 0 ; }
pointer_type get_ptr() { return m_initialized ? get_ptr_impl() : 0 ; }
bool is_initialized() const { return m_initialized ; }
bool is_initialized() const BOOST_NOEXCEPT { return m_initialized ; }
protected :
@ -757,7 +758,16 @@ class optional_base : public optional_tag
storage_type m_storage ;
} ;
template <typename T>
struct optional_value_type
{
};
template <typename T>
struct optional_value_type< ::boost::optional<T> >
{
typedef T type;
};
#include <boost/optional/detail/optional_trivially_copyable_base.hpp>
@ -1304,7 +1314,7 @@ class optional
#endif
#ifndef BOOST_NO_CXX11_REF_QUALIFIERS
#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
template <typename F>
value_type value_or_eval ( F f ) const&
{
@ -1322,6 +1332,61 @@ class optional
else
return f();
}
template <typename F>
optional<typename boost::result_of<F(reference_type)>::type> map(F f) &
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename boost::result_of<F(reference_const_type)>::type> map(F f) const&
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename boost::result_of<F(reference_type_of_temporary_wrapper)>::type> map(F f) &&
{
if (this->has_value())
return f(boost::move(this->get()));
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type)>::type>::type> flat_map(F f) &
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_const_type)>::type>::type> flat_map(F f) const&
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type_of_temporary_wrapper)>::type>::type> flat_map(F f) &&
{
if (this->has_value())
return f(boost::move(get()));
else
return none;
}
#else
template <typename F>
value_type value_or_eval ( F f ) const
@ -1331,8 +1396,47 @@ class optional
else
return f();
}
template <typename F>
optional<typename boost::result_of<F(reference_type)>::type> map(F f)
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename boost::result_of<F(reference_const_type)>::type> map(F f) const
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_type)>::type>::type> flat_map(F f)
{
if (this->has_value())
return f(get());
else
return none;
}
template <typename F>
optional<typename optional_detail::optional_value_type<typename boost::result_of<F(reference_const_type)>::type>::type> flat_map(F f) const
{
if (this->has_value())
return f(get());
else
return none;
}
#endif
bool has_value() const BOOST_NOEXCEPT { return this->is_initialized() ; }
bool operator!() const BOOST_NOEXCEPT { return !this->is_initialized() ; }
BOOST_EXPLICIT_OPERATOR_BOOL_NOEXCEPT()

3
test/Jamfile.v2
View File

@ -23,6 +23,8 @@ import testing ;
[ run optional_test_convert_from_T.cpp ]
[ run optional_test_empty_braces.cpp ]
[ run optional_test_make_optional.cpp ]
[ run optional_test_flat_map.cpp ]
[ run optional_test_map.cpp ]
[ run optional_test_tie.cpp ]
[ run optional_test_ref_assign_portable_minimum.cpp ]
[ run optional_test_ref_assign_mutable_int.cpp ]
@ -71,6 +73,7 @@ import testing ;
[ run optional_test_static_properties.cpp ]
[ compile optional_test_maybe_uninitialized_warning.cpp ]
[ compile optional_test_deleted_default_ctor.cpp ]
#[ run optional_xconfig_HACK_TO_LIST_PREDEFINED_MACROS.cpp ]
[ run optional_xconfig_NO_PROPER_ASSIGN_FROM_CONST_INT_pass.cpp ]
[ run-fail optional_xconfig_NO_PROPER_ASSIGN_FROM_CONST_INT_fail.cpp ]
[ run optional_xconfig_NO_PROPER_CONVERT_FROM_CONST_INT_pass.cpp ]

2
test/optional_test.cpp
View File

@ -32,7 +32,7 @@
#include "boost/core/lightweight_test.hpp"
#include "optional_test_common.cpp"
#include "optional_test_common.hpp"
void test_implicit_construction ( optional<double> opt, double v, double z )
{

12
test/optional_test_common.cpp → test/optional_test_common.hpp
View File

@ -194,6 +194,9 @@ inline void check_uninitialized_const ( optional<T> const& opt )
BOOST_TEST( !opt ) ;
BOOST_TEST( !get_pointer(opt) ) ;
BOOST_TEST( !opt.get_ptr() ) ;
BOOST_TEST( !opt.has_value() ) ;
BOOST_TEST( !opt.is_initialized() ) ;
BOOST_TEST( opt == boost::none ) ;
}
template<class T>
inline void check_uninitialized ( optional<T>& opt )
@ -204,6 +207,9 @@ inline void check_uninitialized ( optional<T>& opt )
BOOST_TEST( !opt ) ;
BOOST_TEST( !get_pointer(opt) ) ;
BOOST_TEST( !opt.get_ptr() ) ;
BOOST_TEST( !opt.has_value() ) ;
BOOST_TEST( !opt.is_initialized() ) ;
BOOST_TEST( opt == boost::none ) ;
check_uninitialized_const(opt);
}
@ -220,6 +226,9 @@ inline void check_initialized_const ( optional<T> const& opt )
BOOST_TEST ( !!opt ) ;
BOOST_TEST ( get_pointer(opt) ) ;
BOOST_TEST ( opt.get_ptr() ) ;
BOOST_TEST ( opt.has_value() ) ;
BOOST_TEST ( opt.is_initialized() ) ;
BOOST_TEST ( opt != boost::none ) ;
}
template<class T>
@ -234,6 +243,9 @@ inline void check_initialized ( optional<T>& opt )
BOOST_TEST ( !!opt ) ;
BOOST_TEST ( get_pointer(opt) ) ;
BOOST_TEST ( opt.get_ptr() ) ;
BOOST_TEST ( opt.has_value() ) ;
BOOST_TEST ( opt.is_initialized() ) ;
BOOST_TEST ( opt != boost::none ) ;
check_initialized_const(opt);
}

275
test/optional_test_flat_map.cpp Normal file
View File

@ -0,0 +1,275 @@
// Copyright (C) 2018 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#include "boost/optional/optional.hpp"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/core/ignore_unused.hpp"
#include "boost/core/is_same.hpp"
#include "boost/core/lightweight_test.hpp"
#include "boost/core/lightweight_test_trait.hpp"
using boost::optional;
using boost::make_optional;
using boost::core::is_same;
template <typename Expected, typename Deduced>
void verify_type(Deduced)
{
BOOST_TEST_TRAIT_TRUE(( is_same<Expected, Deduced> ));
}
struct Int
{
int i;
explicit Int(int i_) : i(i_) {}
};
struct convert_t
{
typedef optional<Int> result_type;
optional<Int> operator()(int i) { if (i != 0) return Int(i); else return boost::none; }
};
void test_flat_map_on_mutable_optional_with_function_object()
{
{
optional<int> oi (1);
verify_type< optional<Int> >(oi.flat_map(convert_t()));
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(bool(oI));
BOOST_TEST_EQ(1, oI->i);
}
{
optional<int> oi (0);
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(!oI);
}
{
optional<int> oi;
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(!oI);
}
}
void test_flat_map_on_const_optional_with_function_object()
{
{
const optional<int> oi (1);
verify_type< optional<Int> >(oi.flat_map(convert_t()));
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(bool(oI));
BOOST_TEST_EQ(1, oI->i);
}
{
const optional<int> oi (0);
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(!oI);
}
{
const optional<int> oi;
optional<Int> oI = oi.flat_map(convert_t());
BOOST_TEST(!oI);
}
}
void test_flat_map_with_lambda()
{
#if !defined BOOST_NO_CXX11_LAMBDAS && !defined BOOST_NO_CXX11_DECLTYPE_N3276
{
optional<int> oi (1);
verify_type< optional<Int> >(oi.flat_map([](int i){ return optional<Int>(i == 0, Int(i)); }));
optional<Int> oI = oi.flat_map([](int i){ return optional<Int>(i != 0, Int(i)); });
BOOST_TEST(bool(oI));
BOOST_TEST_EQ(1, oI->i);
}
{
optional<int> oi (0);
optional<Int> oI = oi.flat_map([](int i){ return optional<Int>(i != 0, Int(i)); });
BOOST_TEST(!oI);
}
{
optional<int> oi;
optional<Int> oI = oi.flat_map([](int i){ return optional<Int>(i != 0, Int(i)); });
BOOST_TEST(!oI);
}
#endif // lambdas
}
struct get_opt_ref
{
typedef optional<int&> result_type;
optional<int&> operator()(int& i) { return i != 0 ? optional<int&>(i) : optional<int&>(); }
};
void test_flat_map_obj_to_ref()
{
{
optional<int> oi (2);
verify_type< optional<int&> >(oi.flat_map(get_opt_ref()));
optional<int&> ori = oi.flat_map(get_opt_ref());
BOOST_TEST(bool(ori));
BOOST_TEST_EQ(2, *ori);
*ori = 3;
BOOST_TEST(bool(oi));
BOOST_TEST_EQ(3, *oi);
BOOST_TEST_EQ(3, *ori);
}
{
optional<int> oi (0);
optional<int&> ori = oi.flat_map(get_opt_ref());
BOOST_TEST(!ori);
}
{
optional<int> oi;
optional<int&> ori = oi.flat_map(get_opt_ref());
BOOST_TEST(!ori);
}
}
optional<int&> get_opt_int_ref(Int& i)
{
return i.i ? optional<int&>(i.i) : optional<int&>();
}
void test_flat_map_ref_to_ref()
{
{
Int I (5);
optional<Int&> orI (I);
verify_type< optional<int&> >(orI.flat_map(get_opt_int_ref));
optional<int&> ori = orI.flat_map(get_opt_int_ref);
BOOST_TEST(bool(ori));
BOOST_TEST_EQ(5, *ori);
*ori = 6;
BOOST_TEST_EQ(6, *ori);
BOOST_TEST_EQ(6, I.i);
}
{
Int I (0);
optional<Int&> orI (I);
optional<int&> ori = orI.flat_map(get_opt_int_ref);
BOOST_TEST(!ori);
}
{
optional<Int&> orI;
optional<int&> ori = orI.flat_map(get_opt_int_ref);
BOOST_TEST(!ori);
}
}
optional< optional<Int> > make_opt_int(int i)
{
if (i == 0)
return boost::none;
else if (i == 1)
return boost::make_optional(optional<Int>());
else
return boost::make_optional(boost::make_optional(Int(i)));
}
void test_flat_map_opt_opt()
{
{
optional<int> oi (9);
verify_type<optional<optional<Int> > >(oi.flat_map(make_opt_int));
optional<optional<Int> > ooI = oi.flat_map(make_opt_int);
BOOST_TEST(bool(ooI));
BOOST_TEST(bool(*ooI));
BOOST_TEST_EQ(9, (**ooI).i);
}
{
optional<int> oi (1);
optional<optional<Int> > ooI = oi.flat_map(make_opt_int);
BOOST_TEST(bool(ooI));
BOOST_TEST(!*ooI);
}
{
optional<int> oi (0);
optional<optional<Int> > ooI = oi.flat_map(make_opt_int);
BOOST_TEST(!ooI);
}
{
optional<int> oi;
optional<optional<Int> > ooI = oi.flat_map(make_opt_int);
BOOST_TEST(!ooI);
}
}
#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
struct MoveOnly
{
int value;
explicit MoveOnly(int i) : value(i) {}
MoveOnly(MoveOnly && r) : value(r.value) { r.value = 0; }
MoveOnly& operator=(MoveOnly && r) { value = r.value; r.value = 0; return *this; }
private:
MoveOnly(MoveOnly const&);
void operator=(MoveOnly const&);
};
MoveOnly makeMoveOnly(int i)
{
return MoveOnly(i);
}
optional<MoveOnly> makeOptMoveOnly(int i)
{
return optional<MoveOnly>(MoveOnly(i));
}
optional<int> get_val(MoveOnly m)
{
return optional<int>(m.value != 0, m.value);
}
void test_flat_map_move_only()
{
{
optional<MoveOnly> om (makeMoveOnly(1)), om2 (makeMoveOnly(2));
verify_type<optional<int> >(boost::move(om).flat_map(get_val));
optional<int> oi = boost::move(om2).flat_map(get_val);
BOOST_TEST(bool(oi));
BOOST_TEST_EQ(2, *oi);
}
{
optional<int> oj = makeOptMoveOnly(4).flat_map(get_val);
BOOST_TEST(bool(oj));
BOOST_TEST_EQ(4, *oj);
}
{
optional<int> oj = optional<MoveOnly>().flat_map(get_val);
BOOST_TEST(!oj);
}
}
#endif // no rvalue refs
int main()
{
test_flat_map_on_mutable_optional_with_function_object();
test_flat_map_on_const_optional_with_function_object();
test_flat_map_with_lambda();
test_flat_map_obj_to_ref();
test_flat_map_ref_to_ref();
test_flat_map_opt_opt();
#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
test_flat_map_move_only();
#endif
return boost::report_errors();
}

192
test/optional_test_map.cpp Normal file
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@ -0,0 +1,192 @@
// Copyright (C) 2018 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// akrzemi1@gmail.com
#include "boost/optional/optional.hpp"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/core/ignore_unused.hpp"
#include "boost/core/is_same.hpp"
#include "boost/core/lightweight_test.hpp"
#include "boost/core/lightweight_test_trait.hpp"
using boost::optional;
using boost::make_optional;
using boost::core::is_same;
template <typename Expected, typename Deduced>
void verify_type(Deduced)
{
BOOST_TEST_TRAIT_TRUE(( is_same<Expected, Deduced> ));
}
#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
struct MoveOnly
{
int value;
explicit MoveOnly(int i) : value(i) {}
MoveOnly(MoveOnly && r) : value(r.value) { r.value = 0; }
MoveOnly& operator=(MoveOnly && r) { value = r.value; r.value = 0; return *this; }
private:
MoveOnly(MoveOnly const&);
void operator=(MoveOnly const&);
};
MoveOnly makeMoveOnly(int i)
{
return MoveOnly(i);
}
optional<MoveOnly> makeOptMoveOnly(int i)
{
return optional<MoveOnly>(MoveOnly(i));
}
int get_val(MoveOnly m)
{
return m.value;
}
void test_map_move_only()
{
optional<MoveOnly> om (makeMoveOnly(7)), om2 (makeMoveOnly(8));
verify_type<optional<int> >(boost::move(om).map(get_val));
optional<int> oi = boost::move(om2).map(get_val);
BOOST_TEST(bool(oi));
BOOST_TEST_EQ(8, *oi);
optional<int> oj = makeOptMoveOnly(4).map(get_val);
BOOST_TEST(bool(oj));
BOOST_TEST_EQ(4, *oj);
optional<MoveOnly> o_;
optional<int> oi_ = boost::move(o_).map(get_val);
BOOST_TEST(!oi_);
}
#endif // no rvalue refs
struct Int
{
int i;
explicit Int(int i_) : i(i_) {}
};
struct convert_t
{
typedef Int result_type;
Int operator()(int i) { return Int(i); }
};
int& get_int_ref(Int& i)
{
return i.i;
}
struct get_ref
{
typedef int& result_type;
int& operator()(int& i) { return i; }
};
void test_map()
{
optional<int> oi (1);
verify_type<optional<Int> >(oi.map(convert_t()));
optional<Int> oI = oi.map(convert_t());
BOOST_TEST(bool(oI));
BOOST_TEST_EQ(1, oI->i);
optional<Int> o_ = optional<int>().map(convert_t());
BOOST_TEST(!o_);
}
optional<Int> make_opt_int(int i)
{
if (i != 0)
return Int(i);
else
return boost::none;
}
void test_map_optional()
{
optional<int> o9 (9), o0 (0), o_;
verify_type<optional<optional<Int> > >(o9.map(make_opt_int));
optional<optional<Int> > oo9 = o9.map(make_opt_int);
BOOST_TEST(bool(oo9));
BOOST_TEST(bool(*oo9));
BOOST_TEST_EQ(9, (**oo9).i);
optional<optional<Int> > oo0 = o0.map(make_opt_int);
BOOST_TEST(bool(oo0));
BOOST_TEST(!*oo0);
optional<optional<Int> > oo_ = o_.map(make_opt_int);
BOOST_TEST(!oo_);
}
void test_map_with_lambda()
{
#if !defined BOOST_NO_CXX11_LAMBDAS && !defined BOOST_NO_CXX11_DECLTYPE_N3276
optional<int> oi (1), oj(2);
verify_type<optional<bool> >(oi.map([](int i){ return i == 1; }));
optional<bool> ob = oi.map([](int i){ return i == 1; });
optional<bool> oc = oj.map([](int i){ return i == 1; });
BOOST_TEST(bool(ob));
BOOST_TEST_EQ(true, *ob);
BOOST_TEST(bool(oc));
BOOST_TEST_EQ(false, *oc);
#endif // lambdas
}
void test_map_to_ref()
{
optional<int> oi (2);
verify_type<optional<int&> >(oi.map(get_ref()));
optional<int&> ori = oi.map(get_ref());
BOOST_TEST(bool(ori));
*ori = 3;
BOOST_TEST(bool(oi));
BOOST_TEST_EQ(3, *oi);
BOOST_TEST_EQ(3, *ori);
}
void test_map_optional_ref()
{
Int I (5);
optional<Int&> ori (I);
verify_type<optional<int&> >(ori.map(get_int_ref));
optional<int&> orii = ori.map(get_int_ref);
BOOST_TEST(bool(orii));
BOOST_TEST_EQ(5, *orii);
*orii = 6;
BOOST_TEST_EQ(6, I.i);
}
int main()
{
#if (!defined BOOST_NO_CXX11_REF_QUALIFIERS) && (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
test_map_move_only();
#endif
test_map_with_lambda();
test_map();
test_map_optional();
test_map_to_ref();
test_map_optional();
test_map_optional_ref();
return boost::report_errors();
}

11
test/optional_xconfig_HACK_TO_LIST_PREDEFINED_MACROS.cpp
View File

@ -1,4 +1,4 @@
// Copyright (C) 2015 Andrzej Krzemienski.
// Copyright (C) 2015 - 2018 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -11,6 +11,7 @@
#include "boost/core/lightweight_test.hpp"
#include "boost/optional/detail/optional_config.hpp"
#include "boost/predef.h"
#include <string>
int main()
@ -37,5 +38,13 @@ int main()
BOOST_TEST_EQ(empty, __GNUC_PATCHLEVEL__);
BOOST_TEST_EQ(empty, __cplusplus);
#endif
BOOST_TEST_EQ(empty, BOOST_COMP_GNUC);
BOOST_TEST_EQ(empty, BOOST_COMP_CLANG);
BOOST_TEST_EQ(empty, BOOST_LANG_STDCPP);
BOOST_TEST_EQ(empty, BOOST_LIB_C_GNU);
BOOST_TEST_EQ(empty, BOOST_LIB_STD_GNU);
BOOST_TEST_EQ(empty, BOOST_LIB_STD_CXX);
return boost::report_errors();
}