Aleksey Gurtovoy wrote:
No, the error is caused by the following code in MPL's pair_view (which is the underlying implementation mechanism for the binary transform):
typedef typename min< typename iterator_category
::type , typename iterator_category ::type >::type category_; That is, as per iterator_category's requirements [1], pair_view assumes that the iterator_category's result would be model of MPL's Integral Constant, which does not seem to be the case with Fusion categories.
[1] http://www.boost.org/doc/libs/1_39_0/libs/mpl/doc/refmanual/iterator-categor...
I see. It's a fusion bug then. I'll see what I can do. In the meantime, may I request the OP to add a trac ticket entry for this? Thank you, Aleksey! Regards, -- Joel de Guzman http://www.boostpro.com http://spirit.sf.net