all_of binary predicate

[Dirk Vanden Boer]

Hi,

Im trying to compare two float vectors using a custom compare that takes nan values into account.

I'm currently trying something like this:

BOOST_COMPUTE_FUNCTION(bool, float_equal, (value_type x, value_type y),

{

    if (isnan(x) && isnan(y))

    {

        return true;
    }

    if (isnan(x) || isnan(y))

    {

        return false;
    }

       
       return x == y;

});

return boost::compute::all_of(

    boost::compute::make_zip_iterator(boost::make_tuple(begin1, begin2)),

    boost::compute::make_zip_iterator(boost::make_tuple(end1, end2)),

    float_equal

);

Except the all_of function only accepts unary operators.

Wouldn't it make sense for the all_of algorithm to support a binary predicate so it can be used in combination with a zip_iterator.

Or am I overlooking something that would make this possible?

My current solution is to perform a transform_reduce that counts the number of non_equals but the all_of solution seems more natural.

Kind regards,

Dirk

[Jakub Szuppe]

Take a look at https://github.com/boostorg/compute/blob/develop/test/test_function.cpp#L109

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[Dirk Vanden Boer]

Thanks a lot! That did the trick.

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