https://konstantd.github.io/tags/polymorphism/Recent content in Polymorphism on My C++ Technical BlogHugo -- 0.155.3en-usTue, 16 Jun 2026 14:37:09 +0300https://konstantd.github.io/posts/class-member-functions-rules/Tue, 16 Jun 2026 14:37:09 +0300https://konstantd.github.io/posts/class-member-functions-rules/<p>For resource managing in classes, <strong>do not think that move will always move</strong>. It will fallback to copy if the object is not moveable. Or if the operation throws an exception, it will fall back to copy as well, so <strong>always mark</strong> the move constructor as <code>noexcept</code> as we saw on the <a href="https://konstantd.github.io/posts/move-ctor-no-except/">previous blog about move semantics</a>.</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-cpp" data-lang="cpp"><span style="display:flex;"><span><span style="color:#66d9ef">struct</span> <span style="color:#a6e22e">MyClass</span>{ </span></span><span style="display:flex;"><span> std<span style="color:#f92672">::</span>vector<span style="color:#f92672">&lt;</span><span style="color:#66d9ef">int</span><span style="color:#f92672">&gt;</span> m_data; </span></span><span style="display:flex;"><span> <span style="color:#f92672">~</span>MyClass() <span style="color:#f92672">=</span> <span style="color:#66d9ef">default</span>; </span></span><span style="display:flex;"><span>}; </span></span></code></pre></div><p>Given the above class, consider the below lines:</p>