Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


BOOST_VMD_ASSERT_IS_TUPLE — Asserts that the sequence is a Boost PP tuple.


// In header: <boost/vmd/assert_is_tuple.hpp>



The macro checks that the sequence is a Boost PP tuple. If it is not a Boost PP tuple, it forces a compiler error.

The macro normally checks for a Boost PP tuple only in debug mode. However an end-user can force the macro to check or not check by defining the macro BOOST_VMD_ASSERT_DATA to 1 or 0 respectively.

sequence = a possible Boost PP tuple.

returns  = Normally the macro returns nothing. 

           If the sequence is a Boost PP tuple, nothing is 
           For VC++, because there is no sure way of forcing  
           a compiler error from within a macro without producing
           output, if the sequence is not a Boost PP tuple the 
           macro forces a compiler error by outputting invalid C++. 
           For all other compilers a compiler error is forced 
           without producing output if the sequence is not a 
           Boost PP tuple.