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Update outdated overflow/size guidance in libcudf developer guide #23127

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rapids-bot merged 3 commits into from
Jul 7, 2026
Merged

Update outdated overflow/size guidance in libcudf developer guide #23127

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8c1ad71
Update outdated overflow/size guidance in libcudf developer guide
PointKernel Jul 6, 2026
aed30cc
Merge branch 'main' into docs-libcudf-introspect-overflow
PointKernel Jul 6, 2026
4b93939
Merge branch 'main' into docs-libcudf-introspect-overflow
PointKernel Jul 7, 2026
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10 changes: 8 additions & 2 deletions cpp/doxygen/developer_guide/DEVELOPER_GUIDE.md
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Expand Up @@ -485,8 +485,14 @@ examples.

**Things that libcudf should not validate**:
- Integer overflow
- Ensuring that outputs will not exceed the [2GB size](#cudfsize_type) limit for a given set of
inputs
- Ensuring that outputs will not exceed the [`size_type`](#cudfsize_type) row count limit for a
given set of inputs

This policy describes libcudf's default behavior. Some APIs offer opt-in overflow-aware variants for
callers that need strict semantics, such as the `SUM_OVERFLOW` aggregation, which reports
overflow through an output flag, and the overflow-checking AST arithmetic operators
(`ADD_OVERFLOW`, `SUB_OVERFLOW`, and similar) that raise on overflow.
These are explicit, caller-selected behaviors rather than validation performed on every API.


## libcudf expects nested types to have sanitized null masks
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