__newindex api C lua

Question

The question is how to do the following, from the Lua C API:

settings.default.color = 10 --(raise an error)
persistent.channel.xxx = 15 --(call function to set)
y = persistent.channel.xxx --(call function to read)

Answer 1

Use a proxy table. See http://www.lua.org/pil/13.4.4.html