Hello Felipe, ----- Mensaje original ----- De: Felipe Magno de Almeida <felipe.m.almeida@gmail.com> Fecha: Viernes, Marzo 3, 2006 11:22 pm Asunto: [boost] [multi_index] BOOST_MULTI_INDEX_CONST_MEM_FUN and membertemplate functions

Hi,

BOOST_MULTI_INDEX_CONST_MEM_FUN is implemented ths way:

#define BOOST_MULTI_INDEX_CONST_MEM_FUN(Class,Type,MemberFunName) \ ::boost::multi_index::const_mem_fun<Class,Type,&Class::MemberFunName>

But when I need to do something like this:

typedef boost::tuple<std::string, std::string> tuple;

BOOST_MULTI_INDEX_CONST_MEM_FUN(tuple, std::string const&, get<0>);

It doesnt work because of the two closing brackets that results from the macro expansion. Couldnt be added a space after &Class::MemberFunName ? Here it works ok adding the space.

Of course, count on this being committed asap. I've got a couple of questions, though: 1. Regardless of whether your compiler takes the expanded macro as containing a '>>' instead of two '>'s, it is my understanding that a *conformant* preprocessor shouldn't do this. Is this correct? (I'll add the blank, anyway.) 2. Do you say this particular use of const_mem_fun (macro problems aside) works for you? Which compiler and version of Boost (1.33.1,CVS) are you using? I'm a little surprised because accessing tuple::get with const_mem_fun is a very tricky issue, as discussed for instance in the following thread: http://lists.boost.org/boost-users/2005/12/16087.php Joaquín M López Muñoz Telefónica, Investigación y Desarrollo