Issue.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012, 2013 Ripple Labs Inc.
 
    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.
 
    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
 
#ifndef RIPPLE_PROTOCOL_ISSUE_H_INCLUDED
#define RIPPLE_PROTOCOL_ISSUE_H_INCLUDED
 
#include <cassert>
#include <functional>
#include <type_traits>
 
#include <ripple/protocol/UintTypes.h>
 
namespace ripple {
 
class Issue
{
public:
    Currency currency;
    AccountID account;
 
    Issue()
    {
    }
 
    Issue(Currency const& c, AccountID const& a) : currency(c), account(a)
    {
    }
};
 
bool
isConsistent(Issue const& ac);
 
std::string
to_string(Issue const& ac);
 
std::ostream&
operator<<(std::ostream& os, Issue const& x);
 
template <class Hasher>
void
hash_append(Hasher& h, Issue const& r)
{
    using beast::hash_append;
    hash_append(h, r.currency, r.account);
}
 
[[nodiscard]] inline constexpr bool
operator==(Issue const& lhs, Issue const& rhs)
{
    return (lhs.currency == rhs.currency) &&
        (isXRP(lhs.currency) || lhs.account == rhs.account);
}
[[nodiscard]] inline constexpr std::weak_ordering
operator<=>(Issue const& lhs, Issue const& rhs)
{
    if (auto const c{lhs.currency <=> rhs.currency}; c != 0)
        return c;
 
    if (isXRP(lhs.currency))
        return std::weak_ordering::equivalent;
 
    return (lhs.account <=> rhs.account);
}
//------------------------------------------------------------------------------
 
inline Issue const&
xrpIssue()
{
    static Issue issue{xrpCurrency(), xrpAccount()};
    return issue;
}
 
inline Issue const&
noIssue()
{
    static Issue issue{noCurrency(), noAccount()};
    return issue;
}
 
}  // namespace ripple
 
#endif