chakkk309 opened a new pull request, #48615:
URL: https://github.com/apache/arrow/pull/48615
### Rationale for this change
Replace custom `arrow::util::span` implementation with C++20 `std::span`
as suggested in issue #48588. This modernizes the codebase and removes ~130
lines of custom code.
### What changes are included in this PR?
* Removed `src/arrow/util/span.h` (custom span implementation)
* Replaced all `arrow::util::span<T>` usage with `std::span<T>` (95
occurrences)
* Updated all `#include "arrow/util/span.h"` to `#include <span>` (41
files)
* Modified span tests to use std namespace
### Are these changes tested?
Yes - created comprehensive tests verifying std::span compatibility with
all original arrow::util::span functionality including construction, subspan,
element access, and byte conversion.
### Are there any user-facing changes?
No user-facing changes.
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