Porting to Lua 5.2, LUA_GLOBALSINDEX trouble

问题

In the code example: http://lua-users.org/wiki/SimplerCppBinding

There is the code:

lua_pushstring(L, T::className);
lua_pushvalue(L, methods);
lua_settable(L, LUA_GLOBALSINDEX);  //<--- LUA_GLOBALSINDEX removed in Lua 5.2

lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methods);
lua_settable(L, metatable); 

In Lua 5.2, LUA_GLOBALSINDEX no longer exists. Instead, it has lua_setglobal() and lua_getglobal().

---

Am I correct in thinking that:

lua_pushvalue(L, methods);
lua_setglobal(L, T::className);

...is the correct replacement for:

lua_pushstring(L, T::className);
lua_pushvalue(L, methods);
lua_settable(L, LUA_GLOBALSINDEX);

I'm too new to Lua to be sure, I haven't used it for 8 months. Looking at the documentation, I'm thinking this is correct, but would like verification.

回答1:

Instead of lua_settable(L,LUA_GLOBALSINDEX); use lua_setglobal(L,T::className);. That works in both Lua 5.1 and 5.2.

来源：https://stackoverflow.com/questions/9057943/porting-to-lua-5-2-lua-globalsindex-trouble