Deprecate constant lookups via .const_missing

[lanej]

Constant lookups are terrible. They cause cryptic errors and are hard to test without message expectations.

• Store a simple hash-of-hashes to model the tree
• Deprecate constant lookups by providing convenience functions using a simple variadic positional argument

Feature.enabled?(:new_feature, :available_for_presentation, user: OpenStruct.new(id: 12345)) # true

[kgraves]

This all looks good to me 👍

[Roguelazer]

why not just define this as, you know,

class Error < NameError do
   ...
end

Anonymous classes often feel like a code smell to me

[lanej]

not an anonymous class, just a different way to declare a subclass.

[Roguelazer]

same question