Fix FlatMap implementation in Result type #10403
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The coveralls checks failing are a false positive. Coverage before: After: |
ziggie1984
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some code style minor nits - otherwise LGTM
yyforyongyu
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Cool - I think we should address the comments and then merge.
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@gijswijs, remember to re-request review from reviewers when ready |
For a Result[T], FlatMap should apply f when the result is Ok, and propagate the error unchanged when it's Err. The original code returns r on Ok and tries to use r.left when Err, which is wrong. This commit fixes that. Secondly, the group of FlatMap/AndThen and OrElse functions and methods are now properly tested with new unit tests. fixes lightningnetwork#10401
yyforyongyu
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Jan 6, 2026
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The
FlatMapmethod for theResulttype has been corrected to apply the provided function when the result isOkand propagate the error unchanged when it isErr.Comprehensive unit tests have been added to ensure proper functionality of FlatMap, AndThen, and OrElse methods.
Fixes #10401