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

utf8.codepoint (s [, i [, j]])sijiji

luaL_typename[-0, +0, –] const char *luaL_typename (lua_State *L, int index); Returns the name of the type

dofile ([filename])dofilestdindofiledofile

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

debug.getuservalue (u) Returns the Lua value associated to u. If u is not a full userdata, returns nil.

lua_tothread[-0, +0, –] lua_State *lua_tothread (lua_State *L, int index); Converts the value at the given

io.output ([file]) Similar to io.input, but operates

package.searchpath (name, path [, sep [, rep]]) Searches for the given name in the given path. A path is a string containing a sequence of templates

debug.traceback ([thread,] [message [, level]]) If message is present but is neither a string nor nil, this function returns message without further