[diff.library] Entry for `abs` incompatibility
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Description
The following code has undefined behavior in C++, but is well-defined in C:
abs(LLONG_MIN);
This happens because in C++, abs is overloaded and dispatches to llabs,
whereas in C, LLONG_MIN yields zero when converted to int when calling int abs(int).
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at the diff.library entry for abs and compare the C and C++ behavior described in the issue, including abs(LLONG_MIN). Update the entry so this incompatibility is recorded accurately; done means the relevant C/C++ distinction is clearly documented.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 68/100