6436c614d7
So it can be used for other types in the system outside of raft, like counter_id, table_id, table_schema_version, and more. Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <ostream>
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#include <functional>
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#include "utils/UUID.hh"
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namespace raft {
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namespace internal {
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template<typename Tag>
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class tagged_uint64 {
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uint64_t _val;
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public:
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tagged_uint64() : _val(0) {}
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explicit tagged_uint64(uint64_t v) : _val(v) {}
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tagged_uint64(const tagged_uint64&) = default;
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tagged_uint64(tagged_uint64&&) = default;
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tagged_uint64& operator=(const tagged_uint64&) = default;
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auto operator<=>(const tagged_uint64&) const = default;
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explicit operator bool() const { return _val != 0; }
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uint64_t get_value() const {
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return _val;
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}
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operator uint64_t() const {
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return get_value();
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}
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tagged_uint64& operator++() { // pre increment
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++_val;
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return *this;
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}
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tagged_uint64 operator++(int) { // post increment
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uint64_t v = _val++;
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return tagged_uint64(v);
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}
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tagged_uint64& operator--() { // pre decrement
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--_val;
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return *this;
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}
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tagged_uint64 operator--(int) { // post decrement
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uint64_t v = _val--;
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return tagged_uint64(v);
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}
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tagged_uint64 operator+(const tagged_uint64& o) const {
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return tagged_uint64(_val + o._val);
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}
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tagged_uint64 operator-(const tagged_uint64& o) const {
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return tagged_uint64(_val - o._val);
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}
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friend std::ostream& operator<<(std::ostream& os, const tagged_uint64<Tag>& u) {
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os << u._val;
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return os;
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}
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};
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template<typename Tag>
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using tagged_id = utils::tagged_uuid<Tag>;
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} // end of namespace internal
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} // end of namespace raft
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namespace std {
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template<typename Tag>
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struct hash<raft::internal::tagged_uint64<Tag>> {
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size_t operator()(const raft::internal::tagged_uint64<Tag>& val) const {
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return hash<uint64_t>()(val);
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}
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};
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} // end of namespace std
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