forked from boostorg/optional
Catching up with N4078
This commit is contained in:
Andrzej Krzemienski
@ -1337,33 +1337,37 @@
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<code class="computeroutput"><span class="identifier">T</span> <span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span></code>
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<span class="emphasis"><em>(not a ref)</em></span><code class="computeroutput"><span class="special">>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="special">&&;</span></code>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">T</span> <span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span></code>
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<span class="emphasis"><em>(not a ref)</em></span><code class="computeroutput"><span class="special">>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="keyword">const</span><span class="special">&&;</span></code>
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">T</span></code>
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is <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>
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and <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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is initialized.
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<span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> contains a value.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Returns:</strong></span> A move-constructed copy the
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contained value.
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<span class="bold"><strong>Effects:</strong></span> Equivalent to <code class="computeroutput"><span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">move</span><span class="special">(*</span><span class="identifier">val</span><span class="special">);</span></code>.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Throws:</strong></span> Whatever the <code class="computeroutput"><span class="identifier">T</span></code>'s
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constructor selected for the move throws.
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<span class="bold"><strong>Remarks:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code>
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is not <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>,
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the program is ill-formed.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> The requirement is asserted via
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<code class="computeroutput"><span class="identifier">BOOST_ASSERT</span><span class="special">()</span></code>.
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On compilers that do not support ref-qualifiers on member functions this
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overload is not present.
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On GCC compiler the second overload is not present, as this compiler
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incorrectly implements binding of references to const prvalues. On compilers
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that do not support ref-qualifiers on member functions both these overloads
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are not present.
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</li>
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</ul></div>
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<p>
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<span class="inlinemediaobject"><img src="../../images/space.png" alt="space"></span>
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</p>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">&>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">;</span></code>
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<code class="computeroutput"><span class="identifier">T</span> <span class="special">&</span>
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<span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">&>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">;</span></code>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">T</span> <span class="special">&</span>
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@ -1373,6 +1377,11 @@
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<code class="computeroutput"><span class="identifier">T</span> <span class="special">&</span>
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<span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">&>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="special">&&</span> <span class="special">;</span></code>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">T</span> <span class="special">&</span>
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<span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">&>::</span><span class="keyword">operator</span><span class="special">*()</span> <span class="keyword">const</span><span class="special">&&</span>
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<span class="special">;</span></code>
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Requires: </strong></span> <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> is initialized
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@ -1387,9 +1396,11 @@
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> The requirement is asserted via
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<code class="computeroutput"><span class="identifier">BOOST_ASSERT</span><span class="special">()</span></code>.
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On compilers that do not support ref-qualifiers on member functions these
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three overloads are replaced with the classical two: a <code class="computeroutput"><span class="keyword">const</span></code> and non-<code class="computeroutput"><span class="keyword">const</span></code>
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member functions.
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On GCC compiler the fourth overload is not present, as this compiler
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incorrectly implements binding of references to const prvalues. On compilers
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that do not support ref-qualifiers on member functions these four overloads
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are replaced with the classical two: a <code class="computeroutput"><span class="keyword">const</span></code>
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and non-<code class="computeroutput"><span class="keyword">const</span></code> member functions.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Example:</strong></span>
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@ -1415,13 +1426,7 @@
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Returns:</strong></span> A reference to the contained
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value, if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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is initialized.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Throws:</strong></span> An instance of <code class="computeroutput"><span class="identifier">bad_optional_access</span></code>, if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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is not initialized.
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<span class="bold"><strong>Effects:</strong></span> Equivalent to <code class="computeroutput"><span class="keyword">return</span> <span class="keyword">bool</span><span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="special">?</span> <span class="special">*</span><span class="identifier">val</span> <span class="special">:</span> <span class="keyword">throw</span> <span class="identifier">bad_optional_access</span><span class="special">();</span></code>.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> On compilers that do not support
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@ -1452,22 +1457,24 @@
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<code class="computeroutput"><span class="identifier">T</span> <span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">value</span><span class="special">()</span> <span class="special">&&</span>
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<span class="special">;</span></code>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">T</span> <span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">value</span><span class="special">()</span> <span class="keyword">const</span><span class="special">&&</span> <span class="special">;</span></code>
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">T</span></code>
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is <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>.
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<span class="bold"><strong>Effects:</strong></span> Equivalent to <code class="computeroutput"><span class="keyword">return</span> <span class="keyword">bool</span><span class="special">(*</span><span class="keyword">this</span><span class="special">)</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="identifier">val</span><span class="special">)</span> <span class="special">:</span> <span class="keyword">throw</span>
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<span class="identifier">bad_optional_access</span><span class="special">();</span></code>.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Returns:</strong></span> A move-constructed copy of
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the contained value, if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> is initialized.
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<span class="bold"><strong>Remarks:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code>
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is not <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>,
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the program is ill-formed.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Throws:</strong></span> An instance of <code class="computeroutput"><span class="identifier">bad_optional_access</span></code>, if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>
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is not initialized.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> On compilers that do not support
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ref-qualifiers on member functions this overload is not present.
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<span class="bold"><strong>Notes:</strong></span> On GCC compiler the second overload
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is not present, as this compiler incorrectly implements binding of references
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to const prvalues. On compilers that do not support ref-qualifiers on
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member functions both these overloads are not present.
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</li>
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</ul></div>
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<p>
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@ -1481,13 +1488,14 @@
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">T</span></code>
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is <a href="../../../../../utility/CopyConstructible.html" target="_top"><code class="computeroutput"><span class="identifier">CopyConstructible</span></code></a> and <code class="computeroutput"><span class="identifier">U</span> <span class="special">&&</span></code>
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is convertible to <code class="computeroutput"><span class="identifier">T</span></code>.
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<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="special">**</span><span class="keyword">this</span><span class="special">;</span> <span class="keyword">else</span> <span class="keyword">return</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span><span class="identifier">U</span><span class="special">>(</span><span class="identifier">v</span><span class="special">);</span></code>.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
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<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</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">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span><span class="identifier">U</span><span class="special">>(</span><span class="identifier">v</span><span class="special">);</span></code>.
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<span class="bold"><strong>Remarks:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code>
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is not <a href="../../../../../utility/CopyConstructible.html" target="_top"><code class="computeroutput"><span class="identifier">CopyConstructible</span></code></a> or <code class="computeroutput"><span class="identifier">U</span> <span class="special">&&</span></code>
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is not convertible to <code class="computeroutput"><span class="identifier">T</span></code>,
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the program is ill-formed.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> On compilers that do not support
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@ -1507,15 +1515,14 @@
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</p></blockquote></div>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
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<li class="listitem">
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<span class="bold"><strong>Requires:</strong></span> <code class="computeroutput"><span class="identifier">T</span></code>
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is <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>
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and <code class="computeroutput"><span class="identifier">U</span> <span class="special">&&</span></code>
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is convertible to <code class="computeroutput"><span class="identifier">T</span></code>.
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<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">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">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span><span class="identifier">U</span><span class="special">>(</span><span class="identifier">v</span><span class="special">);</span></code>.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Effects:</strong></span> <code class="computeroutput"><span class="keyword">if</span>
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<span class="special">(*</span><span class="keyword">this</span><span class="special">)</span> <span class="keyword">return</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>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">forward</span><span class="special"><</span><span class="identifier">U</span><span class="special">>(</span><span class="identifier">v</span><span class="special">);</span></code>.
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<span class="bold"><strong>Remarks:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code>
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is not <code class="computeroutput"><span class="identifier">MoveConstructible</span></code>
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or <code class="computeroutput"><span class="identifier">U</span> <span class="special">&&</span></code>
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is not convertible to <code class="computeroutput"><span class="identifier">T</span></code>,
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the program is ill-formed.
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</li>
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<li class="listitem">
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<span class="bold"><strong>Notes:</strong></span> On compilers that do not support
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@ -133,7 +133,7 @@
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</div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"><p><small>Last revised: June 20, 2014 at 20:25:26 GMT</small></p></td>
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<td align="left"><p><small>Last revised: June 27, 2014 at 22:17:04 GMT</small></p></td>
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<td align="right"><div class="copyright-footer"></div></td>
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</tr></table>
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<hr>
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@ -96,12 +96,14 @@
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<span class="identifier">T</span><span class="special">*</span> <span class="keyword">operator</span> <span class="special">->()</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_arrow"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span><span class="special">&</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="special">&;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="special">&&;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span><span class="special">&</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="special">&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="special">&&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="keyword">operator</span> <span class="special">*()</span> <span class="keyword">const</span><span class="special">&&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_operator_asterisk_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="keyword">const</span><span class="special">&</span> <span class="identifier">value</span><span class="special">()</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span><span class="special">&</span> <span class="identifier">value</span><span class="special">()</span> <span class="special">&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="identifier">value</span><span class="special">()</span> <span class="special">&&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="identifier">T</span> <span class="identifier">value</span><span class="special">()</span> <span class="keyword">const</span><span class="special">&&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">U</span><span class="special">></span> <span class="identifier">T</span> <span class="identifier">value_or</span><span class="special">(</span> <span class="identifier">U</span> <span class="special">&&</span> <span class="identifier">v</span> <span class="special">)</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value_or"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
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<span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">U</span><span class="special">></span> <span class="identifier">T</span> <span class="identifier">value_or</span><span class="special">(</span> <span class="identifier">U</span> <span class="special">&&</span> <span class="identifier">v</span> <span class="special">)</span> <span class="special">&&</span> <span class="special">;</span> <a class="link" href="../boost_optional/reference/detailed_semantics.html#reference_optional_value_or_move"><span class="inlinemediaobject"><img src="../images/callouts/R.png" alt="R"></span></a>
|
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|
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