Fold a tuple of entries into the prerequisites still outstanding once every
part's own contributions are accounted for — the composite's In.
A part's In that an earlier part contributes is discharged internally and
never surfaces; anything left is republished as the composite's own
requirement, exactly as a nested stack republishes an unmet prerequisite.
Fold a tuple of entries into the prerequisites still outstanding once every part's own contributions are accounted for — the composite's
In.A part's
Inthat an earlier part contributes is discharged internally and never surfaces; anything left is republished as the composite's own requirement, exactly as a nested stack republishes an unmet prerequisite.