Warning
For efficiency, the implementation may reuse the returned keyboard-state object next time read-keyboard is called. You should clone any values from the returned tuple you need to preserve.

The keyboard state returned by this word is unprocessed by any keymaps, modifier keys, key repeat settings, or other operating environment postprocessing. Because of this, read-keyboard should not be used for text entry purposes. The Factor UI's standard gesture mechanism should be used in cases where the logical meaning of keypresses is needed; see Keyboard gestures.