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Added shared_ptr aliasing move constructor.

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Signed-off-by: Gavin Lambert <github@mirality.co.nz>
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Gavin Lambert
2015-10-12 18:19:22 +13:00
parent df90496583
commit 05d5a4e9a0
4 changed files with 126 additions and 0 deletions
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shared_ptr.htm
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@@ -139,6 +139,8 @@ void bad()
template&lt;class Y&gt; <a href="#aliasing_constructor" >shared_ptr</a>(shared_ptr&lt;Y&gt; const &amp; r, element_type * p); // never throws
template&lt;class Y&gt; <a href="#aliasing_move_constructor" >shared_ptr</a>(shared_ptr&lt;Y&gt; &amp;&amp; r, element_type * p); // never throws
template&lt;class Y&gt; explicit <a href="#weak_ptr_constructor" >shared_ptr</a>(<a href="weak_ptr.htm" >weak_ptr</a>&lt;Y&gt; const &amp; r);
template&lt;class Y&gt; explicit <a href="#auto_ptr_constructor" >shared_ptr</a>(std::auto_ptr&lt;Y&gt; &amp; r);
@@ -352,6 +354,16 @@ template&lt;class Y&gt; shared_ptr(shared_ptr&lt;Y&gt; &amp;&amp; r); // never t
<p><b>Postconditions:</b> <code>get() == p &amp;&amp; use_count() == r.use_count()</code>.</p>
<p><b>Throws:</b> nothing.</p>
</blockquote>
<h3 id="aliasing_move_constructor">aliasing move constructor</h3>
<pre>template&lt;class Y&gt; shared_ptr(shared_ptr&lt;Y&gt; &amp;&amp; r, element_type * p); // never throws</pre>
<blockquote>
<p>
<b>Effects:</b> Move-constructs a <code>shared_ptr</code> from <code>r</code>, while
storing <code>p</code> instead.
</p>
<p><b>Postconditions:</b> <code>get() == p</code> and <code>use_count()</code> equals the old count of <code>r</code>. <code>r</code> is <em>empty</em> and <code>r.get() == 0</code>.</p>
<p><b>Throws:</b> nothing.</p>
</blockquote>
<h3 id="weak_ptr_constructor">weak_ptr constructor</h3>
<pre>template&lt;class Y&gt; explicit shared_ptr(<a href="weak_ptr.htm" >weak_ptr</a>&lt;Y&gt; const &amp; r);</pre>
<blockquote>