all the appropriate commits (and the appropriate other patches),
as generated by the Traversal phase of the update algorithm.
-\end{basedescript}
-
-\stdsection{ WIP tip satisfaction, reachable commits }
-
-Set of all reachable commits, O.
+\item[ $\allreach$ ]
+The set of all reachable commits.
A reachable commit is one we might refer to explicitly in any of these
algorithms, and any ancestor of such a commit. We explicitly
-enumerate all of the input commits (U), so the reachable commits are
-originally the input commits and their ancestors. Each commit we
-generate will have reachable commits as ancestors so when we generate
-a new commit we only add that new commit to O.
+enumerate all of the input commits ($\allsrcs$), so the reachable
+commits are originally the input commits and their ancestors.
-So O varies over time as we generate more commits. We write O_py for
-the set of reachable commits at the point where we have just generated
-T_py, ie jusjt after Merge-Tip(P).
-
-We preserve/ensure
- Tip_Py >= pendsof( O_py, Py )
-(Tip_py is computed during traversal for the patch P)
-
-We ensure this property by:
- - we do not generate any commits for py other than
- during Merge-Tip
- - so at the start of Merge-Tip pendsof (O, py) = pendsof (U, py)
- - Merge-Tip itself wip wip wip
+$\allreach$ varies over time as we generate more commits. Each
+commit we generate will have only reachable commits as ancestors, so
+generating a new commit (only) adds that new commit to $\allreach$.
+\item[ $\allreachof{\py}$ ]
+The set of reachable commits at the point where we have just generated
+$\tippy$, i.e. just after $\alg{Merge-Tip}(\p)$.
+\end{basedescript}
~ian / topbloke-formulae.git / blobdiff