Hi, I have been using boost/operators.hpp recently, and found it quite good at removing lines of code from my maintainance area :) I have some remarks about it : 1/ The mixed operators are only provided if you know the type in advance and it is fixed. For example, it is not possible for example to mix with a template family of types. E.g. let's say that My_type has to provide mixed operators with all types X<U>. This is not possible to do with the current library. Another related thing is how to express "I want My_type to mix with all integral types". Maybe there could be a version of the operators that uses enable_if and tr1::is_integral somehow, for this purpose ? Just a thought. 2/ I think it is "Euclidean Ring", not "Euclidian Ring" ("e" instead of "i"), hence the names for euclidian_ring_operators<T> and similar, are unfortunate. -- Sylvain