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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "types.h"
#include <vespa/document/base/globalid.h>
#include <vespa/vespalib/stllike/hash_fun.h>
#include <vespa/vespalib/stllike/string.h>
#include <iosfwd>
namespace vespalib { class asciistream; }
namespace storage::spi {
/**
* Convenience wrapper for referencing a document type and global id with
* a timestamp.
*
* Prefer this instead of a std::tuple due to named fields and a pre-provided hash function.
*/
struct DocTypeGidAndTimestamp {
vespalib::string doc_type;
document::GlobalId gid;
Timestamp timestamp;
DocTypeGidAndTimestamp();
DocTypeGidAndTimestamp(const vespalib::string& doc_type_, document::GlobalId gid_, Timestamp timestamp_) noexcept;
DocTypeGidAndTimestamp(const DocTypeGidAndTimestamp&);
DocTypeGidAndTimestamp& operator=(const DocTypeGidAndTimestamp&);
DocTypeGidAndTimestamp(DocTypeGidAndTimestamp&&) noexcept;
DocTypeGidAndTimestamp& operator=(DocTypeGidAndTimestamp&&) noexcept;
bool operator==(const DocTypeGidAndTimestamp& rhs) const noexcept {
return ((doc_type == rhs.doc_type) && (gid == rhs.gid) &&
(timestamp == rhs.timestamp));
}
void print(vespalib::asciistream&) const;
vespalib::string to_string() const;
struct hash {
size_t operator()(const DocTypeGidAndTimestamp& dt_gid_ts) const noexcept {
size_t h = document::GlobalId::hash()(dt_gid_ts.gid);
h = h ^ (vespalib::hash<vespalib::string>()(dt_gid_ts.doc_type) + 0x9e3779b9U + (h << 6U) + (h >> 2U));
return h ^ (dt_gid_ts.timestamp + 0x9e3779b9U + (h << 6U) + (h >> 2U)); // Basically boost::hash_combine
}
};
};
vespalib::asciistream& operator<<(vespalib::asciistream&, const DocTypeGidAndTimestamp&);
std::ostream& operator<<(std::ostream&, const DocTypeGidAndTimestamp&);
}
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