Re: [boost] [Boost.Test] return value of macros

From: Gennadiy Rozental (rogeeff_at_[hidden])
Date: 2008-01-26 05:52:44

"Thorsten Ottosen" <thorsten.ottosen_at_[hidden]> wrote in message 
news:47986956.1060904_at_dezide.com...
> Hi Gennadiy,
>
> I often want to output message or do additional test of another test 
> fails.
>
> It would be cool if I could do it like this:
>
> if( !BOOST_CHECK_CLOSE( aStarEcr, close,  0.0001 ) )
> {
>      BOOST_MESSAGE( "\nA* sequence: " << aStarSeq );
>      BOOST_MESSAGE( "\nClose sequence: " << closeSeq );
> }
>
> But, AFAICT, the macros are implemented this way:
>
>
> #define BOOST_CHECK_WITH_ARGS_IMPL( P, check_descr, TL, CT, ARGS )  \
> do {                                                                \
>     BOOST_TEST_PASSPOINT();                                         \
>     BOOST_TEST_TOOL_IMPL( check_frwd, P, check_descr, TL, CT )      \
>     BOOST_PP_SEQ_FOR_EACH( BOOST_TEST_PASS_ARG_INFO, '_', ARGS ) ); \
> } while( ::boost::test_tools::dummy_cond )                          \
> /**/
>
> Do you think it would be possible have a bool returning function
> instead of the while loop?

I can do what you need for gcc using ({ ... }) . Unfortunately it doesn't 
seem ot work for most other compilers including msvc. If you know portable 
solution please let me know.

Gennadiy.