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I prefer 2)
1. It is simpler than 1)
2. If there is bug in 2), you can correct it and just dofile() —— no
need restart the program.

2011/11/26 Marc Balmer <>:
> Hi
> I have a stylistic question wrt/ calling Lua "callbacks" from a C
> program.  I see two obvious approaches:
> 1) Lua code registers callbacks explicitely using a RegisterCallback
> function that is provided by the C program; the C program later calls
> the callback function when one is registered.
> 2) Lua code does not register callbacks, but the callbacks must be
> functions with a certain name, e.g. "MouseMovedCallback"; C code will
> then see if a function with the correct name is available in the Lua
> state, and if so, call it.
> Are there advantages of one approach over the other?  Are there other
> approaches?  If you also use callback written in Lua, which you call
> from C, I'd like you to share your opinion (and/or experience).
> I experienced with both forms, I am unsure for which form to go...
> Thanks,
> Marc