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Added has_value()

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Andrzej Krzemienski
2018-03-24 00:04:15 +01:00
parent 33c7a6aa2b
commit 5182f7f30f
49 changed files with 119 additions and 59 deletions
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4
doc/27_ref_optional_synopsis.qbk
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@ -182,6 +182,8 @@ They are empty, trivially copyable classes with disabled default constructor.
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__]``
@ -256,6 +258,8 @@ They are empty, trivially copyable classes with disabled default constructor.
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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@ -754,6 +754,7 @@ __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.
@ -1040,6 +1041,7 @@ __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 +11,11 @@
[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]).
[heading Boost Release 1.67]
* Fixed [@https://github.com/boostorg/optional/issues/46 issue #46].

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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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@ -3,7 +3,7 @@
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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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@ -422,6 +422,9 @@
<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>

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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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@ -1592,6 +1592,9 @@
<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>.

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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Initialization tags</title>
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Optional References</title>
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@ -75,6 +75,8 @@
<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>

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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Optional Values</title>
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@ -108,6 +108,8 @@
<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>

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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_io.hpp&gt;</title>
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Detailed semantics</title>
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@ -3,7 +3,7 @@
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Release Notes</title>
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@ -28,6 +28,29 @@
</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></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 +68,7 @@
</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 +92,7 @@
</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 +100,7 @@
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 +143,7 @@
</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 +154,7 @@
#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 +168,7 @@
</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 +204,7 @@
</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 +214,7 @@
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>

2
doc/html/boost_optional/tutorial/design_overview.html
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@ -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">

2
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">

2
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">

2
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">

2
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">
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<link rel="prev" href="in_place_factories.html" title="In-Place Factories">

2
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">
<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="mixed_relational_comparisons.html" title="Mixed relational comparisons">

2
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">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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<link rel="up" href="../gotchas.html" title="Gotchas">
<link rel="prev" href="moved_from__optional_.html" title="Moved-from optional">

2
doc/html/boost_optional/tutorial/gotchas/moved_from__optional_.html
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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">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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<link rel="prev" href="../gotchas.html" title="Gotchas">

2
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">
<link rel="up" href="../../optional/tutorial.html" title="Tutorial">
<link rel="prev" href="optional_references/rebinding_semantics_for_assignment_of_optional_references.html" title="Rebinding semantics for assignment of optional references">

2
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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<link rel="prev" href="relational_operators.html" title="Relational operators">

2
doc/html/boost_optional/tutorial/optional_references.html
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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">
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
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<link rel="prev" href="io_operators.html" title="IO operators">

2
doc/html/boost_optional/tutorial/optional_references/rebinding_semantics_for_assignment_of_optional_references.html
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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>
<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_references.html" title="Optional references">
<link rel="prev" href="../optional_references.html" title="Optional references">

15
doc/html/boost_optional/tutorial/performance_considerations.html
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@ -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>

2
doc/html/boost_optional/tutorial/relational_operators.html
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@ -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">
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<link rel="prev" href="when_to_use_optional.html" title="When to use Optional">

2
doc/html/boost_optional/tutorial/type_requirements.html
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@ -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">
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2
doc/html/boost_optional/tutorial/when_to_use_optional.html
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@ -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">

4
doc/html/index.html
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@ -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>
@ -146,7 +146,7 @@
</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: March 23, 2018 at 23:01:17 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>

2
doc/html/optional/reference.html
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@ -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">
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2
doc/html/optional/reference/header__boost_optional_optional_hpp_.html
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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.hpp&gt;</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="../../boost_optional/reference/header__boost_optional_optional_fwd_hpp_.html" title="Header &lt;boost/optional/optional_fwd.hpp&gt;">

2
doc/html/optional/tutorial.html
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@ -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">
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<link rel="prev" href="../boost_optional/quick_start/storage_in_containers.html" title="Storage in containers">

1
include/boost/optional/detail/optional_reference_spec.hpp
View File

@ -159,6 +159,7 @@ 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; }
#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES

4
include/boost/optional/optional.hpp
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@ -375,7 +375,7 @@ 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 :
@ -1333,6 +1333,8 @@ class optional
}
#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()

2
test/optional_test.cpp
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@ -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);
}