Re: [boost] Preprocessor Library

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2002-04-10 12:36:43

> 1. I need to pre-generate a large number of repetitions for most EDG
> compilers, which it seems basically can't handle any PP lib constructs,
> making me wonder how much the PP lib is really buying me.

David, it helps significantly every time you get rid of one 'level' of
recursion.

// make.h

#ifndef UPPER_BOUND
#error UPPER_BOUND is not set
#endif

#ifndef LOWER_BOUND
#define LOWER_BOUND 1
#endif

#define IS_RANGE(N) LOWER_BOUND <= N && UPPER_BOUND >= N

#if RANGE(0)
    MACRO(0)
#endif
#if RANGE(1)
    MACRO(1)
#endif
#if RANGE(2)
    MACRO(2)
#endif
// etc.

// sample.h

#define LOWER_BOUND 0
#define UPPER_BOUND 15

#define AUX_MY_CONSTRUCT_GET(i) \
    template< BOOST_MY_LIBRARY_PP_PARAMS(i, typename T) > \
    struct my_construct { /* more stuff */ }; \
    /**/

#define MACRO AUX_MY_CONSTRUCT_GET

#include "make.h"

#undef LOWER_BOUND
#undef UPPER_BOUND
#undef AUX_MY_CONSTRUCT_GET
#undef MACRO

Paul Mensonides