boostorg/optional
1
0
Fork 1
mirror of https://github.com/boostorg/optional.git synced 2025-07-15 21:32:17 +02:00
Code Issues Packages Projects Releases Wiki Activity

improved example in tutorial

Browse Source
This commit is contained in:
Andrzej Krzemienski
2014-06-06 23:52:29 +02:00
parent a4e507077e
commit d25b0cfd59
3 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
doc/01_quick_start.qbk
View File

@ -88,12 +88,12 @@ Suppose we want to implement a ['lazy load] optimization. This is because we do
class Widget
{
boost::optional<Resource> resource_;
mutable boost::optional<const Resource> resource_;
public:
Widget() {}
Resource& getResource() // not thread-safe
const Resource& getResource() const // not thread-safe
{
if (resource_ == boost::none)
resource_.emplace("resource", "arguments");

4
doc/html/boost_optional/quick_start/optional_data_members.html
View File

@ -35,12 +35,12 @@
</p>
<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">Widget</span>
<span class="special">{</span>
<span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">Resource</span><span class="special">&gt;</span> <span class="identifier">resource_</span><span class="special">;</span>
<span class="keyword">mutable</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">Resource</span><span class="special">&gt;</span> <span class="identifier">resource_</span><span class="special">;</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="identifier">Widget</span><span class="special">()</span> <span class="special">{}</span>
<span class="identifier">Resource</span><span class="special">&amp;</span> <span class="identifier">getResource</span><span class="special">()</span> <span class="comment">// not thread-safe</span>
<span class="keyword">const</span> <span class="identifier">Resource</span><span class="special">&amp;</span> <span class="identifier">getResource</span><span class="special">()</span> <span class="keyword">const</span> <span class="comment">// not thread-safe</span>
<span class="special">{</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">resource_</span> <span class="special">==</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">none</span><span class="special">)</span>
<span class="identifier">resource_</span><span class="special">.</span><span class="identifier">emplace</span><span class="special">(</span><span class="string">"resource"</span><span class="special">,</span> <span class="string">"arguments"</span><span class="special">);</span>

2
doc/html/index.html
View File

@ -129,7 +129,7 @@
</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: June 06, 2014 at 21:22:06 GMT</small></p></td>
<td align="left"><p><small>Last revised: June 06, 2014 at 21:50:26 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td>
</tr></table>
<hr>