[FR] `Tuple`-backed `AbstractDict` for storing a parsing table, as a performance optimization?

[nsajko]

• Some possible variants:

  • With the value of each key as an element in a run time Tuple.

  • With the value of each key in the type domain. Only possible when the value of each key is isbits.

  • With the RHS backed by Memory, or, alternatively, by a custom isbits vector..