<p>Is there a method like the destruct method in c++?</p>
<hr/>**评论：**<br/><br/>dgryski: <pre><p><a href="https://golang.org/pkg/runtime/#SetFinalizer" rel="nofollow">https://golang.org/pkg/runtime/#SetFinalizer</a> but note that you have no guarantee when it will run, or even if it will run at all. Best to add an explicit Close to your type.</p></pre>mattn: <pre><p>C++ ensure calling the destructor when the instance of object goes out of the scope. But Go or some programming language that uses GC doesn't ensure the calling. Because GC will be run in the time when Go's scheduler want to do. So SetFinalizer may not match your expected. I suggest to use contract-programming that use interface WriteCloser that dgryski says.</p></pre>wangshaonan: <pre><p>I want to write a class for db connection ,just like a mysql connection ,user call connect method at start .But if user don't call close method explicitly before GC ,I want the connection will be close too. </p></pre>natefinch: <pre><p>I think you need to post what kind of problem you're trying to solve, because it's hard to help when you ask about a solution, not the problem. </p></pre>wangshaonan: <pre><p>I want to write a class for db connection ,just like a mysql connection ,user call connect method at start .But if user don't call close method explicitly before GC ,I want the connection will be close too. </p></pre>
