lua_copy[-0, +0, –] void lua_copy (lua_State *L, int fromidx, int toidx); Copies the element at index

os.setlocale (locale [, category]) Sets the current locale of the program. locale is a system-dependent string specifying a locale; category is an optional

debug.upvaluejoin (f1, n1, f2, n2) Make the n1-th upvalue of the Lua closure f1 refer to the n2-th upvalue of the Lua closure f2

file:seek ([whence [, offset]]) Sets and gets the file position, measured from the beginning of the file, to the position given by offset plus a base specified by

utf8.char (···)

luaL_optstring[-0, +0, v] const char *luaL_optstring (lua_State *L, int arg

lua_isuserdata[-0, +0, –] int lua_isuserdata (lua_State *L, int index); Returns 1 if the value at the given

getmetatable (object) If object does not have a metatable, returns nil. Otherwise, if the object's metatable has a __metatable field, returns

lua_Debug typedef struct lua_Debug { int event; const char *name; /* (n) */ const char *namewhat; /* (n) */ const char

string.upper (s)