libMesh: A C++ Finite Element Library

Is there any reason why the AutoPtr class does not have a copy 
constructor? I would like to create an stl vector of AutoPtr

   vector< AutoPtr<NumericVector<Number> > > local_solution_history;

to store the entire solution history.


thanks,
df

Re: [Libmesh-users] AutoPtr copy constructor From: John Peterson <jwpeterson@gm...> - 2008-09-18 16:07 On Thu, Sep 18, 2008 at 5:38 PM, David Fuentes <fuentes@...> wrote: > > > Is there any reason why the AutoPtr class does not have a copy > constructor? I would like to create an stl vector of AutoPtr > > vector< AutoPtr<NumericVector<Number> > > local_solution_history; > > to store the entire solution history. Unfortunately you can never ever have a container of AutoPtrs. You might try a boost::shared_ptr instead. The reasoning is that items in an STL container must by copyable, and AutoPtr is not, since it's not clear which copy would then manage the memory. -- John

Re: [Libmesh-users] AutoPtr copy constructor From: Benjamin Kirk <benjamin.kirk@na...> - 2008-09-18 17:18 >> Is there any reason why the AutoPtr class does not have a copy >> constructor? I would like to create an stl vector of AutoPtr >> >> vector< AutoPtr<NumericVector<Number> > > local_solution_history; >> >> to store the entire solution history. > > Unfortunately you can never ever have a container of AutoPtrs. You > might try a boost::shared_ptr instead. The reasoning is that items in > an STL container must by copyable, and AutoPtr is not, since it's not > clear which copy would then manage the memory. See this for more info: http://www.devx.com/tips/Tip/13606 Note that there was once upon a time a broken AIX compiler which did not like its own std::auto_ptr<>, which is why we have AutoPtr<>. Make no mistake, though, AutoPtr<> is exactly a std::auto_ptr<>. In fact, we took the std::auto_ptr<> source from gcc's libstdc++ several years back and renamed it. (This is permitted by the licensing of the file.) I am pretty sure we could go back to std::auto_ptr<> now, but I'm not in a big hurry either. -Ben

9 messages have been excluded from this view by a project administrator.