Fix mergYAMLNodes when the node is a sequence #128
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Hello @Nicogene, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!
Summary of Changes
This pull request addresses issue #125 by fixing the mergeYAMLNodes function to correctly handle merging YAML nodes when one of the nodes is a sequence. The original implementation only considered map types and would fail or produce incorrect results when encountering sequences. The updated function now includes logic to append items from the source sequence to the destination sequence if both nodes are sequences. Additionally, it handles cases where the destination and source are scalars or mismatched types by overwriting the destination with the source.
Highlights
- Bug Fix: Fixes a bug in
mergeYAMLNodeswhere sequences were not handled correctly, resolving issue XMLBlobs seems to not be merged when using the include directive #125. - Sequence Handling: Implements logic to correctly merge YAML sequences by appending items from the source sequence to the destination sequence.
- Type Handling: Adds handling for scalar types and mismatched types, overwriting the destination node with the source node in these cases.
Changelog
- src/creo2urdf/src/Utils.cpp
- Added a check for null or invalid source nodes to prevent errors.
- Implemented logic to handle merging of YAML maps, iterating through the source map and merging each key-value pair into the destination map.
- Implemented logic to handle merging of YAML sequences, appending items from the source sequence to the destination sequence.
- Added logic to overwrite the destination node with the source node if they are scalars or of mismatched types.
- Line 272: Added a check for null or invalid source nodes to prevent errors.
- Line 275: Implemented logic to handle merging of YAML maps, iterating through the source map and merging each key-value pair into the destination map.
- Line 292: Implemented logic to handle merging of YAML sequences, appending items from the source sequence to the destination sequence.
- Line 299: Added logic to overwrite the destination node with the source node if they are scalars or of mismatched types.
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A YAML node's deep merge,
Maps and sequences emerge,
From chaos to form,
Avoiding the storm,
Data's structure, we urge.
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Code Review
The pull request addresses a bug in the mergeYAMLNodes function, specifically when dealing with sequence nodes. The fix involves adding logic to handle sequence merging correctly, which is crucial for scenarios like merging XMLBlobs. The code is now more robust and handles different YAML node types effectively.
Summary of Findings
- Sequence Merging Logic: The added logic for merging sequence nodes by appending source items to the destination is a correct approach to fix the identified issue.
- Type Handling: The code now explicitly checks for map and sequence types before merging, and overwrites when types are mismatched or scalars are encountered, which provides more robust type handling.
- Null Check: The addition of a null check at the beginning of the function prevents potential errors when dealing with empty source nodes.
Merge Readiness
The code changes appear to correctly address the identified issue with merging YAML nodes, particularly sequences. The added checks for null values and different node types enhance the robustness of the function. I recommend merging this pull request after addressing the comments provided. I am unable to directly approve the pull request, and users should have others review and approve this code before merging.
| else if (src.IsSequence() && dest.IsSequence()) { | ||
| for (const auto& item : src) { | ||
| dest.push_back(item); | ||
| } |
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It's good that you're handling sequences. However, consider adding a check to ensure that the items being pushed back are compatible with the destination sequence's expected type. If they are not, this could lead to runtime errors or unexpected behavior.
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It is too complex to do this check
| // If dest and src are scalars or mismatched types, overwrite | ||
| else { | ||
| dest = src; | ||
| } |
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This else block overwrites the destination node if the types are mismatched or if they are scalars. While this behavior might be intended, it's worth documenting this explicitly with a comment to clarify the expected behavior for future maintainers.
| // If dest and src are scalars or mismatched types, overwrite | |
| else { | |
| dest = src; | |
| } | |
| // If dest and src are scalars or mismatched types, overwrite | |
| // This ensures that the destination node is updated with the source value | |
| else { | |
| dest = src; | |
| } |
It fixes #125.
This function has been written by an old chatGPT and fixed by a newer chatGPT :D
Tested, it works now also with sequences (e.g. XMLBlobs)