(chibi weak)

Library for weak data structures.

(make-ephemeron key value)

Returns a new ephemeron. This ephemeron holds a weak reference to key, such that value will only be traced by the GC if key is referenced from an external object.

(ephemeron? x)

Returns true iff x is an ephemeron.

(ephemeron-broken? ephemeron)

Returns true iff ephemerons key has been GCed.

(ephemeron-key ephemeron)

Returns ephemerons key, or #f if it has been GCed.

(ephemeron-value ephemeron)

Returns ephemerons value.