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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Qt User Interface *
* *
* Copyright (c) 1999-2016, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This file is modified from the KDE syntax-highlighting framework, *
* which is copyright (C) 2016 Volker Krause <vkrause@kde.org> *
* and is distributed under the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* As an exception, when this program is distributed through (i) the *
* App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or *
* (iii) Google Play by Google Inc., then that store may impose any *
* digital rights management, device limits and/or redistribution *
* restrictions that are required by its terms of service. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
#include "syntax/context.h"
#include "syntax/state.h"
#include "syntax/state_p.h"
#include <cassert>
namespace regina {
namespace syntax {
State State::copy() const
{
State s;
s.d.reset(new StateData(*d));
return s;
}
StateData::StateData() :
m_defData(nullptr)
{
}
StateData* StateData::get(State &state)
{
return state.d.get();
}
bool StateData::isEmpty() const
{
return m_contextStack.empty();
}
void StateData::clear()
{
m_contextStack.clear();
}
int StateData::size() const
{
return m_contextStack.size();
}
void StateData::push(Context *context)
{
assert(context);
m_contextStack.push_back(context);
}
void StateData::pop()
{
m_contextStack.pop_back();
}
Context* StateData::topContext() const
{
assert(!isEmpty());
return m_contextStack.back();
}
State::State() :
d(new StateData)
{
}
State::State(const State &other) :
d(other.d)
{
}
State::~State()
{
}
State& State::operator=(const State &other)
{
d = other.d;
return *this;
}
bool State::operator==(const State &other) const
{
return d->m_contextStack == other.d->m_contextStack && d->m_defData == other.d->m_defData;
}
bool State::operator!=(const State &other) const
{
return !(*this == other);
}
} } // namespace regina::syntax
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