Re: [boost] Avoiding boost::noncopyable error.

From: James Porter (porterj_at_[hidden])
Date: 2008-04-16 17:03:21

On Tue, Apr 15, 2008 at 5:38 AM, Emre Turkay <emreturkay_at_[hidden]> wrote:
> Hi folks,
>
>  In the example below, while (1) is compiling fine, (2) causes compiler error
>  in linux gcc 4.1.3.
>  I certainly don't want to copy the member variable of the object in copy
>  constructor, and I need T2.
>  How can I handle it?
>
[snip]
>     B(const B<T>& b) { }   // (1)
>     template <typename T2> B(const B<T2>& b) { } // (2)

Without (1), you'll be using the (implicit) default copy constructor,
which takes precedence over (2) and will attempt to copy A. You need
both copy constructors for this.

- Jim