Re: [boost] [type_traits] extension has_operator_xxx - conforming to coding guidelines for ICE

Subject: Re: [boost] [type_traits] extension has_operator_xxx - conforming to coding guidelines for ICE
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2011-02-03 18:13:02

AMDG

On 2/3/2011 2:36 PM, Frédéric Bron wrote:
> I have tried to comply with the coding guidelines for integral
> constant expressions
> (http://www.boost.org/development/int_const_guidelines.html).
> I have been able to comply with most of them but still have the following issue:
>
>> Don't use dependent default parameters for non-type template parameters.
>> For example:
>>
>> template<class T, int I = ::boost::is_integral<T>::value>   // Error can't deduce value of I in some cases.
>> struct foobar;
>>
>> Rationale: this kind of usage fails for Borland C++. Note that this is only an issue where the default value is dependent upon a previous template parameter, for example the following is fine:
>
> Is there any known workaround for this? In my case, int is replaced by
> bool but I think it is the same issue.
>

I personally ignore this page.  It was originally
written for VC 6 and Borland 5.5 which are both
pretty much irrelevant at this point.  Unless
someone can confirm that these problems still
exist in recent versions of Codegear, I vote that
we remove this page.

In Christ,
Steven Watanabe