Re: [boost] [type_traits] common_type fails when typeof is not used

Subject: Re: [boost] [type_traits] common_type fails when typeof is not used
From: John Maddock (boost.regex_at_[hidden])
Date: 2011-01-13 07:31:43

>> I modified your tests somewhat and added updated test cases as well (with
>> one case to test when BOOST_COMMON_TYPE_DONT_USE_TYPEOF is defined).
>>
>> Thanks!  John.
>
> Thanks John.
>
> There is yet an error on Sun compiler that is not really related to 
> common_type code, but to the test code itself.

It's a bug in common_type.hpp (or the compiler), since

common_type<C1C2, C1>::type evaluates to C1C2& and not C1C2.

The same code compiled with msvc does the right thing though...

Any ideas?

John.