Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>This is because you're not destroying <code>A(1)</code> you're assigning <code>A(2)</code> to it, let's extend your example by adding <a href="http://en.wikipedia.org/wiki/Assignment_operator_%28C++%29" rel="nofollow">assign operator</a>:</p> <pre class="lang-cpp prettyprint-override"><code>class A { int a; public: A(int a) : a(a) { cout &lt;&lt; "Constructor a=" &lt;&lt; a &lt;&lt; endl; } ~A() { cout &lt;&lt; "Destructor a=" &lt;&lt; a &lt;&lt; endl; } void print() { cout &lt;&lt; "Print a=" &lt;&lt; a &lt;&lt; endl; } A &amp;operator=(const A &amp;other) { cout &lt;&lt; "Assign operator old=" &lt;&lt; a &lt;&lt; " a=" &lt;&lt; other.a &lt;&lt; endl; a = other.a; } }; </code></pre> <p>Which will result to:</p> <pre class="lang-none prettyprint-override"><code>[vyktor@grepfruit tmp]$ ./a.out Constructor a=1 Print a=1 Constructor a=2 Assign operator old=1 a=2 &lt;- This line explains why destructor is not called Destructor a=2 Print a=2 Destructor a=2 </code></pre> <p>If you have one of these implemented:</p> <ul> <li><strong>Destructor</strong> - Destruct all the object's members</li> <li><strong>Copy constructor</strong> - Construct all the object's members from the equivalent members in the copy constructor's parameter</li> <li><strong>Copy assignment operator</strong> - Assign all the object's members from the equivalent members in the assignment operator's parameter</li> </ul> <p>you should implement all of them. This is called <a href="http://en.wikipedia.org/wiki/Rule_of_three_%28C++_programming%29" rel="nofollow">rule of three</a>.</p>
    singulars
    1. This table or related slice is empty.
    1. POConstructor/Destructor call order on stack
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USVyktor
    1. USVyktor
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POConstructor/Destructor call order on stack
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload