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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 <vespa/vespalib/stllike/string.h>
#include <cstdint>
#include <functional>
namespace vespalib {
class asciistream;
}
namespace document {
class BucketSpace {
public:
using Type = uint64_t;
constexpr BucketSpace(const BucketSpace&) noexcept = default;
constexpr BucketSpace& operator=(const BucketSpace&) noexcept = default;
constexpr explicit BucketSpace(Type id) noexcept : _id(id) {}
constexpr bool operator <(const BucketSpace& bucket) const noexcept { return _id < bucket._id; }
constexpr bool operator==(const BucketSpace& bucket) const noexcept { return _id == bucket._id; }
constexpr bool operator!=(const BucketSpace& bucket) const noexcept { return _id != bucket._id; }
constexpr Type getId() const noexcept { return _id; }
constexpr bool valid() const noexcept { return (_id != 0); }
vespalib::string toString() const;
struct hash {
size_t operator () (const BucketSpace& bs) const noexcept {
return std::hash<Type>()(bs.getId());
}
};
/*
* Temporary placeholder value while wiring in use of BucketSpace in APIs.
*/
static constexpr BucketSpace placeHolder() noexcept { return BucketSpace(1); }
static constexpr BucketSpace invalid() noexcept { return BucketSpace(0); }
private:
Type _id;
};
vespalib::asciistream& operator<<(vespalib::asciistream&, const BucketSpace&);
std::ostream& operator<<(std::ostream&, const BucketSpace&);
}
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