id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2329	GCC preprocessing error	rtelyuk@…	No-Maintainer	"#include ""boost/preprocessor.hpp""

#define _NOP()
#define _UL() _
#define _SC() ;
#define CLASS( name )     class name
#define STRUCT( name )    struct name

#define _PUBLIC() public
#define _PRIVATE() private
#define _PROTECTED() protected

#define DECLARE_MEMBER(r, d, mem) \
    BOOST_PP_TUPLE_ELEM(2, 0, mem) BOOST_PP_TUPLE_ELEM(2, 1, mem) _SC()

#define DECLARE_ARG_CONSTRUCT(r, d, arg) \
    BOOST_PP_TUPLE_ELEM(2, 0, arg) BOOST_PP_TUPLE_ELEM(2, 1, arg)_UL() BOOST_PP_EXPR_IF(BOOST_PP_LESS_EQUAL(r,d), BOOST_PP_COMMA())

#define DECLARE_ARG_CONSTRUCT_INIT(r, d, arg) \
    BOOST_PP_TUPLE_ELEM(2, 1, arg) ( BOOST_PP_TUPLE_ELEM(2, 1, arg)_UL() ) BOOST_PP_EXPR_IF(BOOST_PP_LESS_EQUAL(r,d), BOOST_PP_COMMA())

#define DECLARE_T( lang_type, name, memeber_seq, member_access ) \
    lang_type(name) { \
    name ( \
    BOOST_PP_SEQ_FOR_EACH( DECLARE_ARG_CONSTRUCT, BOOST_PP_SEQ_SIZE(memeber_seq), memeber_seq ) \
    ) : \
    BOOST_PP_SEQ_FOR_EACH( DECLARE_ARG_CONSTRUCT_INIT, BOOST_PP_SEQ_SIZE(memeber_seq), memeber_seq ) \
    {} \
    member_access##: \
    BOOST_PP_SEQ_FOR_EACH( DECLARE_MEMBER , _NOP(), memeber_seq) \
    };

#define DEF_TN( t,n ) ((t,n))

Use in code:
DECLARE_T( STRUCT, some, DEF_TN(int, a) DEF_TN(int, b) DEF_TN(int, c), _PUBLIC() )

Two compilers MSVC++ 2005 for Win platform
and XCode 3.0 GCC for MacOSX platform

Result:
MSVC++ 2005 /W4 ― preprocessing succeful:
struct some { some ( int a_ , int b_ , int c_    ) : a ( a_ ) , b ( b_ ) , c ( c_ )    {} public: int a ; int b ; int c ;   };

XCode GCC ― error: macro ""BOOST_PP_EXPR_IIF"" passed 3 arguments, but takes just 2"	Bugs	closed	Boost 1.37.0	preprocessor	Boost 1.36.0	Problem	invalid