#16264: Rotate error on childless binay trees
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Reporter: VivianePons | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.2
Component: combinatorics | Resolution:
Keywords: combinat, Tamari, binary | Merged in:
trees, FindStat | Reviewers:
Authors: Viviane Pons | Work issues:
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: |
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Comment (by darij):
If we go down the exception route, I would advocate for a new exception
called `PartialMapException` or likewise (unless we already have such a
thing!) that is thrown whenever a combinatorial partial map is caught off
its domain. That could then be used for other things like crystal
operations on tableaux etc. -- rather than having each programmer decide
on their favorite exception and then try to catch them as
`StandardError`s. Then, FindStat (or other code) could catch these
`PartialMapException`s and take them as signs that nothing is wrong and
there just is no image. Basically this means implementing the Maybe monad.
--
Ticket URL: <http://trac.sagemath.org/ticket/16264#comment:18>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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