pitrou commented on issue #2:
URL: https://github.com/apache/iceberg-cpp/issues/2#issuecomment-2527410151
> I'd like to hear more of this. Perhaps a naive example to demonstrate it?
I was thinking something like this. But I'm not an Iceberg expert at all.
```c++
struct FileOpenRequest {
std::string path;
FileInfo info;
};
struct FileOpenResult {
std::any file_handle;
};
struct ReadRangeRequest {
std::any file_handle; // corresponds to FileOpenRequest::file_handle
int64_t offset, length;
};
struct ReadRangeResult {
std::shared_ptr<Buffer> data;
};
struct IoRequest {
std::any handle;
std::variant<FileOpenRequest, ReadRangeRequest> op;
};
struct IoResult {
std::any handle; // corresponds to IoRequest::handle
std::variant<FileOpenResult, ReadRangeResult> op;
};
class IcebergReader {
public:
// Ask the reader which IOs are needed to move forward
std::vector<IoRequest> NeedIo();
// Instruct the reader about these IO results
void IoReceived(std::vector<IoResult>);
// Optional - IOs which may be needed in the future
std::vector<IoRequest> SpeculatedIo();
};
```
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