Passing a C++ shared_ptr to LUA

[MauFranco]

Hello, Thanks for sharing this great library. It has solve almost all my problems but I still have an issue.

I've done all my function and class bindings carefully following the provided instructions. Now I want to call a Lua function from C++ and I want to pass a shared_ptr as an argument to this function, or pass it as a global variable.

I have tried using this binding:

std::shared_ptr<Object> o;
LuaIntf::LuaBinding(L)
 .beginModule("module")
  .addVariableRef("object", o, false)
 .endModule();

lua_pushvalue(L, LUA_GLOBALSINDEX);
lua_getfield(L, LUA_GLOBALSINDEX, functionName);
lua_pcall(L, 0, 0, 0);

And this:

lua_pushlightuserdata(L, o);
lua_setglobal(L, "object");
lua_pushvalue(L, LUA_GLOBALSINDEX);
lua_getfield(L, LUA_GLOBALSINDEX, functionName);
lua_pcall(L, 1, 0, 0);

with no success.

I appreciate if you can help me realize how it is the correct way to do it.

Thank you very much in advance, Kind regards,

Mauricio.

[SteveKChiu]

Assume you already have success with std::shared_ptr<Object> for other function, the best way to pass std::shared_ptr<Object> to lua function from c++ is via:

1. LuaRef::fromValue
2. or Lua::push
3. or Lua::setGlobal

The lua c API won't work, you need to use one of the LuaIntf API.