skunk.util

A value, paired with an optional Origin. We use this to trace user-supplied values back to where they were defined or introduced.

Encapsulates a function that consumes a value and produces a computation that peforms some operation and yields true on success and false on failure. Intended use is with resource pools, where you may wish to do a health check or reset some state when a value is handed back in (or yield false, indicating that the value should be discarded). The only point to this encapsulation is that it allows us to define a monoid!

An LRU (by access) cache, keyed by statement CacheKey.

Witness that type A is isomorphic to a twiddle list.