Re: [boost] auto_vector - vector with auto_ptr semantics

From: Rainer Deyke (root_at_[hidden])
Date: 2002-02-05 10:33:36

----- Original Message -----
From: "Howard Hinnant" <hinnant_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Monday, February 04, 2002 7:40 PM
Subject: Re: [boost] auto_vector - vector with auto_ptr semantics

> How 'bout:
>
> std::vector<int> g()
> {
>    std::vector<int> first, second;
>    // Do various operations on 'first' and 'second' here.
>    return std::vector<int>(std::move(first.size() > second.size() ?
> first : second));
> }
>
> std::vector<int> v(std::move(g()));

That would have the intended behavior on a sufficiently optimizing
compiler, but it's overly verbose and it does not maintain the
no-throw guarantee, since the compiler is not required to optimize
away the copy.

--
Rainer Deyke | root_at_[hidden] | http://rainerdeyke.com