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Subject: Re: [boost] [core/noncopyable][test/boost::unit_test::singleton]massivetestfailures
From: Peter Dimov (lists_at_[hidden])
Date: 2014-08-21 12:08:54

Andrey Semashev wrote:
> My point was that noncopyable should not impose any constraints on the
> user's class beyond the ones needed. The fact that it did before C++11 is
> not an advantage but the necessary evil people had to put up with.

What is your justification for this claim?

> Sure, but following that logic noncopyable shouldn't have existed in the
> first place.

No, this does not follow (even though I agree that it shouldn't have existed
:-). The fact that noncopyable only works for 99.4% of the uses does not
imply that it should not be provided.

> > Stated differently, were the changes driven by any kind of user demand?
> Well, there was this ticket:

Yes, I know. You'll note that it cites no reasons for the change and
provides no examples of noncopyable's supposed inadequacy. It's just "C++11
is shiny, let's make use of it!"

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