bkietz opened a new pull request, #37792:
URL: https://github.com/apache/arrow/pull/37792
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### Rationale for this change
After the PR changing the spec and schema (
https://github.com/apache/arrow/pull/37526 ) is accepted, this PR will be
undrafted. It adds the minimal addition of a C++ implementation and was
extracted from the original C++ Utf8View pr (
https://github.com/apache/arrow/pull/35628 ) for ease of review.
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### What changes are included in this PR?
- The new types are available with new subclasses of DataType, Array,
ArrayBuilder, ...
- The values of string view arrays can be visited as `std::string_view` as
with StringArray
- String view arrays can be round tripped through IPC, parquet, and
integration JSON
- A variant of the string view type `utf8_view(/*has_raw_pointers=*/true)`
is supported
which uses raw pointer views. This enables zero copy interop with code
which uses
raw pointer views.
- Conversions are provided between index/offset view arrays, raw pointer
view arrays, and
regular string arrays.
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