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  <author_name>faith_and_brave</author_name>
  <author_url>https://blog.hatena.ne.jp/faith_and_brave/</author_url>
  <blog_title>Faith and Brave - C++で遊ぼう</blog_title>
  <blog_url>https://faithandbrave.hateblo.jp/</blog_url>
  <categories>
    <anon>GCC</anon>
    <anon>C++</anon>
  </categories>
  <description>以下の4つです。 #include &lt;iostream&gt; #include &lt;vector&gt; #include &lt;algorithm&gt; template &lt;class T&gt; class smart_ptr { T* p_; public: smart_ptr() : p_(0) {} explicit operator bool() const // 1.明示的な型変換演算子 { return p_ != 0; } }; int main() { smart_ptr&lt;int&gt; p; if (p) {} // int x = p + 1; // NG const std::vector&lt;int&gt;…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2010-03-09 16:22:51</published>
  <title> GCC 4.5から使用可能なC++0x機能</title>
  <type>rich</type>
  <url>https://faithandbrave.hateblo.jp/entry/20100309/1268119371</url>
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