StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
10553964
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-05-11T15:05:03.447
FavoriteCount
0
LastActivityDate
2012-05-11T15:05:03.447
LastEditDate
LastEditorUserId
0
OwnerUserId
1370785
ParentId
10552656
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
<ol> <li>You can definitely create Class "a" on the stack.</li> <li>There are 4 (actually more but will stick with the basics) new & delete method signatures you should know. <pre><code>void* operator new (std::size_t size) throw (std::bad_alloc); void* operator new[] (std::size_t size) throw (std::bad_alloc); void operator delete (void* ptr) throw (); void operator delete[] (void* ptr) throw (); </code></pre> You are allocating an array within the "operator new" method which should be done in the "operator new[]" method. This will get rid of your nasty check. Write both, "operator new" and "operator new[]"</li> <li>Don't forget you want to give the caller an object of type "a" ( <code>a myA = new a</code>) so make sure you return "a" not char*, therefore you need to also be casting.</li> <li>You need to write the corresponding delete[] and delete methods.</li> <li>To answer your question, I believe it does leak memory. The new signature you've provided is called the "placement new". This allows you to allocate a new pointer without allocating memory but to give it a location to point to. Example: If you needed a pointer to a specific point in memory. <pre><code>long z = 0x0F9877F80078; a myA = new (z) a[5]; // 5 pointers that point to 0x0F9877F80078 </code></pre></li> </ol> By definition the placement-new operator is not supposed to allocate memory and since you have you make be leaking. Get rid of your second argument, which you can do now since you have 2 versions of operator new and you're good to go. Don't forget to return an object "a". Check out IBM's Info Center: <a href="http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Flanguage%2Fref%2Fcplr318.htm" rel="nofollow">http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Flanguage%2Fref%2Fcplr318.htm</a> And the reference or references, cpluplus.com: <a href="http://www.cplusplus.com/reference/std/new" rel="nofollow">http://www.cplusplus.com/reference/std/new</a>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POis the following new overload leaking memory?
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USjiveturkey
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
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.