If you are tired of angle brackets in your templates (no, it's not a TV
commercial :), may be you'll like this one:
typedef eval<
count_if(
list(int,char,long,int)
, lambda(is_same(_,int))
)
>::type res;
BOOST_STATIC_ASSERT(res::value == 2);
Or this one:
typedef eval<
find_if(
filter_view(
list(int,float,char,long,double)
, lambda(not_(is_float(_)))
)
, lambda( or_(
is_same(_,short)
, less(sizeof_(_),sizeof_(int))
) )
)
>::type iter;
typedef eval< is_same(iter::type,char) >::type res2;
BOOST_STATIC_ASSERT(res2::value);
The above actually compiles on Comeau C/C++ 4.3.0.1 and Intel C++ 6.0 with
the current MPL sources in the CVS; see
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/*checkout*/boost/boost/libs/m
pl/example/lambda2.cpp for an example. Note that the "factorial" snippet
there doesn't work yet (if you ask 'fact::value', it will blow).
Aleksey
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