Re: [Boost-users] lambda : fabs( x - y )< eps

On 3/10/11 11:14 PM, Steven Watanabe wrote:

AMDG

On 03/10/2011 04:40 PM, er wrote:

...

I'm submitting this in case someone easily spots a less verbose representation of fabs( x - y )< eps than the one shown below and would like to share it. Using lambda (or variants) only (I know I can write my own functor class). Thanks.

How about using the attached cmath.hpp for phoenix?

Thanks, it looks worthwhile.

#include <cmath> #include #include #include #include #include #include "cmath.hpp"

int main() { double eps = 0.000001; using namespace boost::phoenix::arg_names; boost::function f = fabs(_1 - _2) < eps;

BOOST_ASSERT( f( 0.0, 0 * eps ) ); BOOST_ASSERT( !f( 0.0, eps ) ); }

In Christ, Steven Watanabe

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