add support for properly typed maps

[ab9rf]

These changes allow codegen to produce properly typed C++ std::map and std::unordered_map objects in generated structures

[ab9rf]

moving this to draft until i sort out the hashing stuff and add identity support for unordered_set

[dhthwy]

wow. this is going to be a nightmare.

have to write hash functions for all the structs like df::labor_kitchen_interface_food_key huh?

[dhthwy]

I believe these errors

error: ‘get’ is not a member of ‘df::identity_traits<std::unordered_set<std::shared_ptr<df::widget> > >’
  440 |     { FLD(CONTAINER, filtered_set), identity_traits<std::unordered_set<std::shared_ptr<df::widget > > >::get(), 0, 0 },

is due to failure from having no hash function. I manually patched labor_kitchen_interface_food_key to include a hash function and it seemed to compile without that error

Which you probably already know...so.

[dhthwy]

library/include/df/custom/file_compressorst.methods.inc has a manual = operator for that one.

I guess the == operator could be done that way for now?

and I suppose could add hash specializations to std namespace so that unordered_map doesn't need a 3rd argument.

[ab9rf]

I believe these errors

error: ‘get’ is not a member of ‘df::identity_traits<std::unordered_set<std::shared_ptr<df::widget> > >’
  440 |     { FLD(CONTAINER, filtered_set), identity_traits<std::unordered_set<std::shared_ptr<df::widget > > >::get(), 0, 0 },

is due to failure from having no hash function. I manually patched labor_kitchen_interface_food_key to include a hash function and it seemed to compile without that error

Which you probably already know...so.

Yes, indeed. The issue is coming up with a way to get these to exist in a clean way via codegen. I have a kernel of an idea on how to do it, but I've already blown my peak programming time for today on other stuff, so I'm going to push this to tomorrow.

also the error above is actually because we don't have an identity_traits specialization for std::unordered_set and so it gets the generic template which is just an empty struct, which doesn't define get - hence, the error