Re: shared_ptr in priority_queue: how to make it work
In article <1149568697.405352.94530@y43g2000cwc.googlegroups.com>, zl2k
<kdsfinger@gmail.com> wrote:
int main(){
priority_queue<shared_ptr<myClass> > pq;
shared_ptr<myClass> temp(new myClass(1));
pq.push(temp);
temp.reset(new myClass(2));
pq.push(temp);
temp.reset(new myClass(3));
pq.push(temp);
while (!pq.empty()){
temp = pq.top();
cout<<temp->a<<endl;
pq.pop();
}
}
you need a less than compare function that compares the pointed to
values of the shared_ptrs. that is
struct pointed_to_less
{
bool operator () (const shared_ptr<MyClass> &a,const
shared_ptr<MyClass> &b) const
{ return *a < *b;}
};
int main()
{
priority_queue<shared_ptr<MyClass>,pointed_to_less> pq;
// etc.
}
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