Re:C++ Core Guidelines
by tragomaskhalos on Friday September 18, 2015 @06:27PM
(#10242409)
You can easily do your != et al from < thing by using CRTP inheriting from a 'comparable' template class that provides the implementations. Sort of thing that should be in std really.
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It is.
using namespace std::rel_ops;
It looks like this isn't attached to the class definition, but rather to the uses. I.e. for every use of a class that only defines ==, <, you have to include rel_ops. But then it would basically provide the other comparators to all classes, maybe not something you'd want.