How to save the Lua object in C + +?

[TWangCoin]

I want to save a Lua of an object in c++. How to define the rest of the future can be used g_p

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Cpp: G_p luaobj; Cppsave (luaobj * a) { G_p=a }

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Test.lua local Luaobj={'name'=100,'psw'=2222} Cppsave (luaobj)