[Cleanup] Accept Variant<...> instead of ObjectRef when possible #17095
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This change is split out from #16183 as an independent change for ease of review. |
Prior to the implementation of `Variant<...>` in apache#15672, functions that were polymorphic over an argument type would typically accept an `ObjectRef` argument, then downcast to an allowed type. This delays the catching of an error, and can accidentally omit automatic conversions applied by the FFI. This commit updates several locations using this pattern to instead accept a `Variant`, templated over the allowed types. This enables C++ type checking for C++ callers, standardizes the type-checking in the FFI for non-C++ callers, and ensures that FFI type conversions are uniformly applied.
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Closed, as this was a subset of #16183, which has merged. |
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Prior to the implementation of
Variant<...>in #15672, functions that were polymorphic over an argument type would typically accept anObjectRefargument, then downcast to an allowed type. This delays the catching of an error, and can accidentally omit automatic conversions applied by the FFI.This commit updates several locations using this pattern to instead accept a
Variant, templated over the allowed types. This enables C++ type checking for C++ callers, standardizes the type-checking in the FFI for non-C++ callers, and ensures that FFI type conversions are uniformly applied.