— Function: atk-state-set-new ⇒  (ret <atk-state-set>)

Creates a new empty state set.

ret

a new <atk-state-set>

— Function: atk-state-set-is-empty (self <atk-state-set>) ⇒  (ret bool)
— Method: is-empty

Checks whether the state set is empty, i.e. has no states set.

set

an <atk-state-type>

ret

‘#t’ if set has no states set, otherwise ‘#f’

— Function: atk-state-set-add-state (self <atk-state-set>) (type <atk-state-type>) ⇒  (ret bool)
— Method: add-state

Add a new state for the specified type to the current state set if it is not already present.

set

an <atk-state-set>

type

an <atk-state-type>

ret

‘#t’ if the state for type is not already in set.

— Function: atk-state-set-clear-states (self <atk-state-set>)
— Method: clear-states

Removes all states from the state set.

set

an <atk-state-set>

— Function: atk-state-set-contains-state (self <atk-state-set>) (type <atk-state-type>) ⇒  (ret bool)
— Method: contains-state

Checks whether the state for the specified type is in the specified set.

set

an <atk-state-set>

type

an <atk-state-type>

ret

‘#t’ if type is the state type is in set.

— Function: atk-state-set-remove-state (self <atk-state-set>) (type <atk-state-type>) ⇒  (ret bool)
— Method: remove-state

Removes the state for the specified type from the state set.

set

an <atk-state-set>

type

an <atk-type>

ret

‘#t’ if type was the state type is in set.

— Function: atk-state-set-and-sets (self <atk-state-set>) (compare_set <atk-state-set>) ⇒  (ret <atk-state-set>)
— Method: and-sets

Constructs the intersection of the two sets, returning ‘#f’ if the intersection is empty.

set

an <atk-state-set>

compare-set

another <atk-state-set>

ret

a new <atk-state-set> which is the intersection of the two sets.

— Function: atk-state-set-or-sets (self <atk-state-set>) (compare_set <atk-state-set>) ⇒  (ret <atk-state-set>)
— Method: or-sets

Constructs the union of the two sets.

set

an <atk-state-set>

compare-set

another <atk-state-set>

ret

a new <atk-state-set> which is the union of the two sets, returning ‘#f’ is empty.

— Function: atk-state-set-xor-sets (self <atk-state-set>) (compare_set <atk-state-set>) ⇒  (ret <atk-state-set>)
— Method: xor-sets

Constructs the exclusive-or of the two sets, returning ‘#f’ is empty. The set returned by this operation contains the states in exactly one of the two sets.

set

an <atk-state-set>

compare-set

another <atk-state-set>

ret

a new <atk-state-set> which contains the states which are in exactly one of the two sets.