io.flush () Equivalent to io.output():flush().

luaL_getmetafield[-0, +(0|1), m] int luaL_getmetafield (lua_State *L, int obj, const char *e);

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

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

tonumber (e [, base]) When called with no base, tonumber tries to convert its argument to a number. If the argument is already a number or a string convertible

coroutine.yield (···) Suspends the execution of the calling coroutine. Any arguments to yield are passed as extra results to resume.

utf8.len (s [, i [, j]])sijij

lua_Alloc typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize,

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