Change AndThen to directly check isRightAssociated#3569
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@@ Coverage Diff @@
## master #3569 +/- ##
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+ Coverage 91.28% 91.32% +0.04%
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Files 386 386
Lines 8605 8611 +6
Branches 246 250 +4
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+ Hits 7855 7864 +9
+ Misses 750 747 -3 |
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By the way I'm marking this as an enhancement instead of a bugfix for the release notes, since the buggy part has never been released. |
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fix #3568
The change to address the above is to avoid
equalwhich on a very deep structure can blow the stack. Instead, directly check the property we want: isRightAssociated.I removed a microoptimization (using != instead of <) since I would be SHOCKED if that changed the perf of this code which has to do quite a bit of pattern matching already. The != is not very safe since if a refactor gets it wrong, it can easily blow past the limit.
Lastly, I couldn't resist a bit of refactoring to share more of the code and improve associations (still at O(1) cost per andThen/compose).
cc @travisbrown