[boost] [Config] A proposal to Boost.Config.

Subject: [boost] [Config] A proposal to Boost.Config.
From: Kohei Takahashi (flast_at_[hidden])
Date: 2011-04-26 02:39:37

Hi,

Boost.Config provides BOOST_PLATFORM macro (it will expand to strings).

However, it cannot use to switch including header like followings.
#include <boost/config.hpp>
#include "somedir/" BOOST_PLATFORM "/someheader.hpp"

So, I propose a new macro BOOST_PLATFORM_LABEL (change to more suitable
name).
That provide not stringized platform name like this.
#define BOOST_PLATFORM_LABEL linux

By using such macro, will be able to switch including header.
#include <boost/config.hpp>
#include <boost/preprocessor/stringize.hpp>
#include
BOOST_PP_STRINGIZE( somedir/BOOST_PLATFORM_LABEL/someheader.hpp )

However, such macro has a problem.
For example, it fail including when *linux* (or another label) defined
to other symbol.
#include <boost/config.hpp>
#include <boost/preprocessor/stringize.hpp>
#define linux others
#include
BOOST_PP_STRINGIZE( somedir/BOOST_PLATFORM_LABEL/someheader.hpp ) //
Oops! Expand to somedir/others/someheader.hpp in linux.

How do you feel this macro?
Thanks.

-- 
TAKAHASHI Kohei
College of Information Science, University of Tsukuba
private mail: flast_at_[hidden]
others:       flast_at_[hidden]
              s0911476_at_[hidden]