This is really uncomfortable to use, but a macro can do it:

if_eq($mode, 1, e(EV_KEY, KEY_A, 0).set(mode, 0), e(EV_KEY, KEY_A, 1).set(mode, 1))

there should probably be

key_up(a) and key_down(a) to simplify it a bit

implementing if_unreleased would help

if_unreleased(a, key_up(a), key_down(a))

but the naming of if_unreleased might be ambiguous, considering a fictional macro of if_held or similar, which might refer to a key being held down on the keyboard. But maybe not and it is perfectly valid.

would key_up and key_down be better than key_release and key_press? "pressing a key" might refer to a complete keystroke in common language, so press might not be the best choice.

TODO:

• key_up (like key, but injects one event of value 0) (easy to implement)
• key_down (like key, but injects one event of value 1) (easy to implement)
• if_held (if the physical key of the mapping is pressed down) (somewhat easy to implement)
• if_unreleased (if key-mapper injected or forwarded a KEY_A down event, but not yet one that releases it. By using the unreleased datastructure it might work. Does unreleased also keep track of unmapped/forwarded keys? I guess that would be wanted as well for this macro) (might be a little bit difficult to implement)

similar: #382 (comment)

added key_down and key_up:

if_eq(
    $mode,
    1,
    key_up(KEY_A).set(mode, 0),
    key_down(KEY_A).set(mode, 1)
)