Function lua_tocfunction

Source/Misc/lua/src/lua.c:2228–2231

LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
StkId o = index2adr(L, idx);
return (!iscfunction(o)) ? NULL : clvalue(o)->c.f;
}


LUA_API void *lua_touserdata (lua_State *L, int idx) {