Re: [Boost-users] boost tti has_member_function

Subject: Re: [Boost-users] boost tti has_member_function
From: Edward Diener (eldiener_at_[hidden])
Date: 2014-05-08 18:06:46

On 5/8/2014 1:06 PM, Edward Diener wrote:
> On 5/7/2014 12:44 AM, Edward Diener wrote:
>> On 5/5/2014 12:34 PM, Matei David wrote:
>>> I'm trying to use boost tti has_member_function to test if a
>>> user-specified allocator has the expected methods. However, this fails
>>> with standard allocators.
>>>
>>> #include <iostream>
>>> #include <memory>
>>> #include <boost/tti/has_member_function.hpp>
>>> BOOST_TTI_HAS_MEMBER_FUNCTION(deallocate)
>>> typedef std::allocator< int > T;
>>> int main()
>>> {
>>>      std::cout << has_member_function_deallocate<
>>>          void (T::*) (T::pointer, T::size_type)
>>>      >::value << "\n";
>>> }
>>>
>>> I tried gcc-4.8.2 and clang-3.4. I'm compiling with:
>>> {g++|clang++} -std=c++11 -I${BOOST}/include -Wall -Wextra
>>> -pedantic -Wno-ignored-qualifiers -g3 -O0
>>>
>>> In both cases, I get a 0. However, using "-E" and grep-ing for
>>> "\<deallocate\>", I see this signature:
>>>
>>> void deallocate(pointer __p, size_type)
>>>
>>> Shouldn't I be getting a 1? Am I using it the wrong way?
>>
>> There is no member function called 'deallocate' in the class
>> std::allocator<T>. There is an inherited 'deallocate' function but TTI
>> cannot currently identify inherited types, data, or functions.
>
> I need to correct that last statement. TTI cannot currently identify
> inherited types, data, and functions if they are protected, but it can
> if they are public.

Apologies, but I am wrong. TTI cannot currently identify inherited 
types, data, or functions even if they are public.