snapshot_iface.hpp

/*
 Copyright 2024 Eugene Gershnik
 
 Use of this source code is governed by a BSD-style
 license that can be found in the LICENSE file or at
 https://github.com/gershnik/thinsqlitepp/blob/main/LICENSE
*/
 
#ifndef HEADER_SQLITEPP_SNAPSHOT_IFACE_INCLUDED
#define HEADER_SQLITEPP_SNAPSHOT_IFACE_INCLUDED
 
#include "handle.hpp"
#include "meta.hpp"
 
namespace thinsqlitepp
{
#if SQLITE_VERSION_NUMBER >= SQLITEPP_SQLITE_VERSION(3, 10, 0) && THINSQLITEPP_ENABLE_EXPIREMENTAL
 
 
    class snapshot final : public handle<sqlite3_snapshot, snapshot> 
    {
    public:
        ~snapshot() noexcept
            { sqlite3_snapshot_free(c_ptr()); }
 
 
        friend int compare(const snapshot & lhs, const snapshot & rhs) noexcept
            { return sqlite3_snapshot_cmp(lhs.c_ptr(), rhs.c_ptr()); }
 
        friend bool operator==(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) == 0; }
        friend bool operator!=(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) != 0; }
 
    #if defined(DOXYGEN) || __cpp_impl_three_way_comparison >= 201907
        friend std::strong_ordering operator<=>(const snapshot & lhs, const snapshot & rhs) noexcept
            { return strong_ordering_from_int(compare(lhs, rhs)); }
    #endif
    #if defined(DOXYGEN) || __cpp_impl_three_way_comparison < 201907
        friend bool operator<(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) < 0; }
        friend bool operator<=(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) <= 0; }
        friend bool operator>(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) > 0; }
        friend bool operator>=(const snapshot & lhs, const snapshot & rhs) noexcept
            { return compare(lhs, rhs) >= 0; }
    #endif
    };
 
#endif
 
}
 
#endif