Re: [boost] warning suppression

From: Andreas Huber (ahd6974-spamboostorgtrap_at_[hidden])
Date: 2007-08-12 05:35:08

"Steven Watanabe" <steven_at_[hidden]> wrote in message 
news:loom.20070811T184620-255_at_post.gmane.org...
>> See above, your finding of flaws with these warnings is not exactly 
>> common.
>
> It's happened to me too.  I was accidentally passing a reference
> type to alignment_of.  I knew there was a problem in my code
> but the warning helped my find it immediately.  If you really
> need to suppress this warning for users you can write
>
> template<class T>
> class C {
> public:
>    C(const C& c) {
>        BOOST_STATIC_ASSERT((!boost::is_same<T, T>::value));
>    }
>    C& operator=(const C& c) {
>        BOOST_STATIC_ASSERT((!boost::is_same<T, T>::value));
>    }
> };

I don't see how this could work for my situation, see my answer to John. 
Statechart users derive their normal (non-template) classes from the class 
template statechart::simple_state. Unless I'm missing something, adding 
static asserts to simple_state (as you do in the class template C) would not 
work as the compiler would then try to generate copy functions for the 
user-defined classes only to issue an error when it tries to instantiate 
simple_state copy functions.

I ask again: If you really do care so much about these warnings then why 
don't you simply reenable them after including the headers that disable 
them? As Bo has mentioned, chances are that other headers that you include 
also disable these warnings.

-- 
Andreas Huber
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