lua_topointer[-0, +0, –] const void *lua_topointer (lua_State *L, int index); Converts the value at the

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

utf8.char (···)

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

lua_Unsigned typedef ... lua_Unsigned; The unsigned version of

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

debug.setupvalue (f, up, value) This function assigns the value value to the upvalue with index up of the function f. The function returns

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

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

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