Making broadcast work for own type

[Tamas_Papp]

Even though the code changed a bit, most of this is still relevant:

Broadcast for custom type

I am using v0.6, this is an MWE of a question I want to solve. I would like to make broadcast work for a custom type struct CongruentVector{Td,Tv} descriptor::Td vector::Tv end the following way: given a method ≅ with fallback ≅(a, b) = a == b I would test that all CongruentVector arguments to broadcast have descriptors that are ≅, then broadcast on their vectors and nothing else, ie every other argument would be treated as a “scalar”. The idea behind this interface is that it woul…