[boost] [Test] XX_MESSAGE and evaluation of arguments

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2007-04-11 10:26:34

Hi Gennadiy,

When I use macros such as

         BOOST_CHECK_MESSAGE( !evidence,
                              "update evidence = " << 
withEvidenceUpdate 					<< ", evidence = " << *evidence );

it annoys me that the second argument is evaluated even when the test 
should pass.

In the case above, evidence is an optional<int>. It would be cool if the
construction of the error messsage could be delayed until it was 
actually needed, to make the above scenario valid.

Do you think that is possible?

Thanks

-Thorsten