Re: [Boost-users] [type traits / MPL] check whether a class has a certain member function

Subject: Re: [Boost-users] [type traits / MPL] check whether a class has a certain member function
From: Edward Diener (eldiener_at_[hidden])
Date: 2013-03-06 22:58:43

On 03/06/2013 01:16 PM, Steven Watanabe wrote:
> AMDG
>
> On 03/06/2013 09:48 AM, Stefan Strasser wrote:
>> Hi,
>>
>> I'm looking for a boost functionality to determine whether a given type
>> has a member function of a given name (or name + signature).
>> this seems to be possible using SFINAE, but all I can find is
>> BOOST_MPL_HAS_XXX_TRAIT_DEF which only works for nested types, not
>> functions.
>> I could of course implement it myself using SFINAE but
>> BOOST_MPL_HAS_XXX_TRAIT_DEF has a lot of compiler bug workarounds it
>> seems, so I guess this will cause problems. Is there such a
>> functionality in boost?
>>
>> I want to use it to determine the defaults of a traits class, similar to
>> C++11 pointer_traits::difference_type. But the determining factor for
>> the default is a function in my case, not a type.
>>
>
> The macro you're looking for is BOOST_TTI_HAS_MEMBER_FUNCTION.
> However, I don't think this has been released yet.  It's in the
> trunk, but I don't see it in the release branch.

I am fairly close to finishing my work with TTI, but it is not yet in 
release.