CODEWITHSUNDEEP
c++
MistyD
MistyD

Reputation: 17223

Emptying contents of a list

Suppose I have a list as such

std::list<foo*> lst;

If I do the following:

lst.clear

will that call the destructor of all items in the list ? or will I have to call the destructor individually for each item ? If not what would be the best way to empty the contents of the list and have the destructor of the pointers called ? Will the following work or is there a better way to do it

 for(
     std::list<foo*>::iterator listMyClassIter = lst.begin();
     listMyClassIter != lst.end();
     listMyClassIter ++) {
     delete listMyClassIter;   }

 lst.clear(); //Now clear the content

Upvotes: 0

Views: 81

Answers (2)

ravi
ravi

Reputation: 10733

Your list is of pointers and pointers don't have destructors. That means you have to explicitly delete pointers in the container.

EDITED AS QUESTION IS EDITED:-

If you want your list to automatically manage memory for you then you can use boost::shared_ptr rather than storing raw pointers.

You can do either of following on raw pointers:-

for (...) { delete *it; } m_list.clear ();

OR

for (...) { delete *it; m_ilist.erase (); }

Upvotes: 3

Haider
Haider

Reputation: 958

Since you are using pointer as element, destructor won't be called.

Upvotes: 1

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