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From: David Abrahams (dave_at_[hidden])
Date: 2006-03-29 11:50:43

David Abrahams <dave_at_[hidden]> writes:

> Ulrich Eckhardt <doomster_at_[hidden]> writes:
>> On Wednesday 29 March 2006 08:05, Václav Veselý wrote:
>>> I'm confused with syntax. new_<T> always creates auto_ptr<T>. How can I
>>> create for example shared_ptr<T>?
>> You probably can't, but:
>> - std::auto_ptr is much less resource intensive (shared_ptr requires an
>> additionally, dynamically-allocated structure to hold some internals)
>> - you don't need to, as auto_ptr converts to shared_ptr, there is a special
>> ctor taking an auto_ptr
> Unfortunately for this particular facility, the converting constructor
> is explicit, so you can't do
> f(new_<T>(a, b, c))
> if f takes a shared_ptr<T>.

I just realized we could probably fix this by removing an "explicit"
from the ctor that accepts an rvalue auto_ptr. What about that,
Peter? This seems like a poster child for rvalue distinction!

Dave Abrahams
Boost Consulting

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