Sharing global variables between different Lua states through require

Question

I\'m trying to find a way to share global variables of a specific Lua script(test.lua in the example) between different Lua states.

Here\'s my simple exampl

Answer 1

While Lua states are separate by default, some binding libraries expose functionality to transfer information from one to the other.

For example, in sol, there are methods to serialize fairly arbitrary Lua data, including functions, to C++ data. You can then de-serialize that data into another Lua state, to effectively copy it (code link).

But you still will have two copies, in the end. You can't modify one Lua state from another directly.

Your last point, about exposing some getter/setter, is valid. You can have some data stored in C/C++ and have two different Lua states able to access it. You still have to bind that data to each VM separately.