calling placement new for elements of a deque

Newsgroup: comp.lang.c++

Subject: calling placement new for elements of a deque

From: hbdevelop1@...

Date: Wed, 26 Feb 2014 21:50:29 -0800 (PST)



Hello

For optimisation reasons, I am re-using not used objects in my deque for new objects.

I am doing that this way :

void Score::Add(const char *str, Coordinates &sp)

{

for(deque<Text>::iterator it=scores.begin();it!=scores.end(); ++it)

{

if(it->notUsed==1)

{

it->Reset(str,sp);

return;

}

}



scores.push_back(Text(str,sp));

}



I thought it would be more convenient to call the placement new on the notUsed object instead of Reset.

How can I do this ?

How can I get the address of the not used object so I can use it in the new placement operator?





Thank you in advance

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