Don't hardcode that certain types are leaves in functor implementation about functors.jl HOT 5 OPEN

One option is to build the default functor on ConstructionBase (which will recurse arrays). Then adopt #41 with a Numeric tag that applies to numbers and numeric arrays.

from functors.jl.

https://github.com/chengchingwen/StructWalk.jl allows to define customized walks

from functors.jl.

Breaking changes aside, I don't see any major issues with this. Functors.jl is in a weird place because it was designed to be used as part of Flux's module system, yet was written as if it were a generic struct traversal library. The upside is that more libraries outside of FluxML have been able to adopt it, but the downside is confusion from some parts seeming too task-specific (e.g. saying all numeric arrays are leaves) and others seeming too general (how many people know what fmap means?).

from functors.jl.

Maybe we should allow users to pass their own functor-like function to fmap.
We can also provide a set of functor variations like the aggressive functor proposed here.

from functors.jl.

I would close this as not planned, since people can just handle numerical arrays or use StructWalk.jl instead.

from functors.jl.