pitrou commented on a change in pull request #7992:
URL: https://github.com/apache/arrow/pull/7992#discussion_r472355484
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File path: cpp/src/arrow/ipc/dictionary.h
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@@ -21,34 +21,75 @@
#include <cstdint>
#include <memory>
-#include <unordered_map>
#include <utility>
#include <vector>
-#include "arrow/memory_pool.h"
+#include "arrow/result.h"
#include "arrow/status.h"
+#include "arrow/type_fwd.h"
#include "arrow/util/macros.h"
#include "arrow/util/visibility.h"
namespace arrow {
+namespace ipc {
-class Array;
-class DataType;
-class Field;
-class RecordBatch;
+class FieldPosition {
+ public:
+ FieldPosition() : parent_(NULLPTR), index_(-1), depth_(0) {}
Review comment:
@bkietz The idea here is to keep track of the current position in a
schema without allocating a `std::vector<int>` for each visited field, only
when necessary (e.g. when a dictionary is encountered). What do you think?
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