pitrou commented on a change in pull request #10295:
URL: https://github.com/apache/arrow/pull/10295#discussion_r630409762
##########
File path: cpp/src/arrow/io/interfaces.h
##########
@@ -49,6 +49,26 @@ struct ReadRange {
}
};
+struct StreamMetadata {
+ struct KeyValue {
+ std::string key;
+ std::string value;
+
+ KeyValue() = default;
+ KeyValue(std::string key, std::string value)
+ : key(std::move(key)), value(std::move(value)) {}
+
+ friend bool operator==(const KeyValue& left, const KeyValue& right) {
+ return (left.key == right.key && left.value == right.value);
+ }
+ friend bool operator!=(const KeyValue& left, const KeyValue& right) {
+ return !(left == right);
+ }
+ };
+
+ std::vector<KeyValue> items;
+};
Review comment:
I'm not sure about this API. Do we want to simplify this to `using
StreamMetadata = std::vector<...>`? Do we want to add a `shared_ptr` somewhere
to minimize copies (but I don't think this is performance-critical)?
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