Detecting any changes in a set of Lua objects from C

[Marc Lepage <mlepage@...>]

Apologies if this seems half-baked.

I am wondering if it is possible, or even a common pattern, to be able to specify a set of objects (say tables) at time A, and later at time B to be able to know if that set of objects has had any changes.

By any changes, I mean:

  - removed fields

  - added fields

  - changed field values

  - changed metatables and values in metatables

Assume the ability to add C code to do this (i.e. it doesn't have to be done in pure Lua).

Basically, I am asking if I can know if there have been changes to a set of Lua objects, from C, without having to proxy out everything in Lua to detect it there.