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//
// immer: immutable data structures for C++
// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
//
// This software is distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
//
#pragma once
namespace immer {
/*!
* Disables any special *transience* tracking. To be used when
* *reference counting* is available instead.
*/
struct no_transience_policy
{
template <typename>
struct apply
{
struct type
{
struct edit
{};
struct owner
{
operator edit() const { return {}; }
};
struct ownee
{
ownee& operator=(edit) { return *this; };
bool can_mutate(edit) const { return false; }
bool owned() const { return false; }
};
static owner noone;
};
};
};
template <typename HP>
typename no_transience_policy::apply<HP>::type::owner
no_transience_policy::apply<HP>::type::noone = {};
} // namespace immer
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