NPDA.h

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/*
 * This file is part of Algorithms library toolkit.
 * Copyright (C) 2017 Jan Travnicek (jan.travnicek@fit.cvut.cz)
 
 * Algorithms library toolkit 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 3 of the License, or
 * (at your option) any later version.
 
 * Algorithms library toolkit 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 Algorithms library toolkit.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
 
 
#include <ext/algorithm>
 
#include <alib/set>
#include <alib/multimap>
#include <alib/vector>
 
#include <core/components.hpp>
 
#include <common/DefaultStateType.h>
#include <common/DefaultSymbolType.h>
 
#include <automaton/AutomatonException.h>
 
#include <core/normalize.hpp>
#include <alphabet/common/SymbolNormalize.h>
#include <automaton/common/AutomatonNormalize.h>
 
#include <automaton/PDA/DPDA.h>
 
namespace automaton {
 
class InputAlphabet;
class PushdownStoreAlphabet;
class InitialSymbol;
class States;
class FinalStates;
class InitialState;
 
template < class InputSymbolTypeT = DefaultSymbolType, class PushdownStoreSymbolTypeT = DefaultSymbolType, class StateTypeT = DefaultStateType >
class NPDA final : public core::Components < NPDA < InputSymbolTypeT, PushdownStoreSymbolTypeT, StateTypeT >, ext::set < InputSymbolTypeT >, component::Set, InputAlphabet, ext::set < PushdownStoreSymbolTypeT >, component::Set, PushdownStoreAlphabet, PushdownStoreSymbolTypeT, component::Value, InitialSymbol, ext::set < StateTypeT >, component::Set, std::tuple < States, FinalStates >, StateTypeT, component::Value, InitialState > {
public:
    typedef InputSymbolTypeT InputSymbolType;
    typedef PushdownStoreSymbolTypeT PushdownStoreSymbolType;
    typedef StateTypeT StateType;
 
private:
    ext::multimap < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > transitions;
 
public:
    explicit NPDA ( ext::set < StateType > states, ext::set < InputSymbolType > inputAlphabet, ext::set < PushdownStoreSymbolType > pushdownStoreAlphabet, StateType initialState, PushdownStoreSymbolType initialSymbol, ext::set < StateType > finalStates );
 
    explicit NPDA ( StateType initialState, PushdownStoreSymbolType initialPushdownSymbol );
 
    /*
     * \brief Creates a new instance of the automaton based on the Deterministic finite automaton.
     *
     * \param other the Deterministic finite automaton
     */
    explicit NPDA ( const DPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & other );
 
    const StateType & getInitialState ( ) const & {
        return this-> template accessComponent < InitialState > ( ).get ( );
    }
 
    StateType && getInitialState ( ) && {
        return std::move ( this-> template accessComponent < InitialState > ( ).get ( ) );
    }
 
    bool setInitialState ( StateType state ) {
        return this-> template accessComponent < InitialState > ( ).set ( std::move ( state ) );
    }
 
    const ext::set < StateType > & getStates ( ) const & {
        return this-> template accessComponent < States > ( ).get ( );
    }
 
    ext::set < StateType > && getStates ( ) && {
        return std::move ( this-> template accessComponent < States > ( ).get ( ) );
    }
 
    bool addState ( StateType state ) {
        return this-> template accessComponent < States > ( ).add ( std::move ( state ) );
    }
 
    void setStates ( ext::set < StateType > states ) {
        this-> template accessComponent < States > ( ).set ( std::move ( states ) );
    }
 
    void removeState ( const StateType & state ) {
        this-> template accessComponent < States > ( ).remove ( state );
    }
 
    const ext::set < StateType > & getFinalStates ( ) const & {
        return this-> template accessComponent < FinalStates > ( ).get ( );
    }
 
    ext::set < StateType > && getFinalStates ( ) && {
        return std::move ( this-> template accessComponent < FinalStates > ( ).get ( ) );
    }
 
    bool addFinalState ( StateType state ) {
        return this-> template accessComponent < FinalStates > ( ).add ( std::move ( state ) );
    }
 
    void setFinalStates ( ext::set < StateType > states ) {
        this-> template accessComponent < FinalStates > ( ).set ( std::move ( states ) );
    }
 
    void removeFinalState ( const StateType & state ) {
        this-> template accessComponent < FinalStates > ( ).remove ( state );
    }
 
    const ext::set < PushdownStoreSymbolType > & getPushdownStoreAlphabet ( ) const & {
        return this->template accessComponent < PushdownStoreAlphabet > ( ).get ( );
    }
 
    ext::set < PushdownStoreSymbolType > && getPushdownStoreAlphabet ( ) && {
        return std::move ( this->template accessComponent < PushdownStoreAlphabet > ( ).get ( ) );
    }
 
    bool addPushdownStoreSymbol ( PushdownStoreSymbolType symbol ) {
        return this->template accessComponent < PushdownStoreAlphabet > ( ).add ( std::move ( symbol ) );
    }
 
    void addPushdownStoreSymbols ( ext::set < PushdownStoreSymbolType > symbols ) {
        this->template accessComponent < PushdownStoreAlphabet > ( ).add ( std::move ( symbols ) );
    }
 
    void setPushdownStoreAlphabet ( ext::set < PushdownStoreSymbolType > symbols ) {
        this->template accessComponent < PushdownStoreAlphabet > ( ).set ( std::move ( symbols ) );
    }
 
    void removePushdownStoreSymbol ( const PushdownStoreSymbolType & symbol ) {
        this->template accessComponent < PushdownStoreAlphabet > ( ).remove ( symbol );
    }
 
    const PushdownStoreSymbolType & getInitialSymbol ( ) const & {
        return this->template accessComponent < InitialSymbol > ( ).get ( );
    }
 
    PushdownStoreSymbolType && getInitialSymbol ( ) && {
        return std::move ( this->template accessComponent < InitialSymbol > ( ).get ( ) );
    }
 
    bool setInitialSymbol ( PushdownStoreSymbolType symbol ) {
        return this->template accessComponent < InitialSymbol > ( ).set ( std::move ( symbol ) );
    }
 
    const ext::set < InputSymbolType > & getInputAlphabet ( ) const & {
        return this-> template accessComponent < InputAlphabet > ( ).get ( );
    }
 
    ext::set < InputSymbolType > && getInputAlphabet ( ) && {
        return std::move ( this-> template accessComponent < InputAlphabet > ( ).get ( ) );
    }
 
    bool addInputSymbol ( InputSymbolType symbol ) {
        return this-> template accessComponent < InputAlphabet > ( ).add ( std::move ( symbol ) );
    }
 
    void addInputSymbols ( ext::set < InputSymbolType > symbols ) {
        this-> template accessComponent < InputAlphabet > ( ).add ( std::move ( symbols ) );
    }
 
    void setInputAlphabet ( ext::set < InputSymbolType > symbols ) {
        this-> template accessComponent < InputAlphabet > ( ).set ( std::move ( symbols ) );
    }
 
    void removeInputSymbol ( const InputSymbolType & symbol ) {
        this-> template accessComponent < InputAlphabet > ( ).remove ( symbol );
    }
 
    bool addTransition ( StateType from, common::symbol_or_epsilon < InputSymbolType > input, ext::vector < PushdownStoreSymbolType > pop, StateType to, ext::vector < PushdownStoreSymbolType > push );
 
    bool addTransition ( StateType from, InputSymbolType input, ext::vector < PushdownStoreSymbolType > pop, StateType to, ext::vector < PushdownStoreSymbolType > push );
 
    bool addTransition ( StateType from, ext::vector < PushdownStoreSymbolType > pop, StateType to, ext::vector < PushdownStoreSymbolType > push );
 
    bool removeTransition ( const StateType & from, const common::symbol_or_epsilon < InputSymbolType > & input, const ext::vector < PushdownStoreSymbolType > & pop, const StateType & to, const ext::vector < PushdownStoreSymbolType > & push );
 
    bool removeTransition ( const StateType & from, const InputSymbolType & input, const ext::vector < PushdownStoreSymbolType > & pop, const StateType & to, const ext::vector < PushdownStoreSymbolType > & push );
 
    bool removeTransition ( const StateType & from, const ext::vector < PushdownStoreSymbolType > & pop, const StateType & to, const ext::vector < PushdownStoreSymbolType > & push );
 
    const ext::multimap < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > & getTransitions ( ) const &;
 
    ext::multimap < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > && getTransitions ( ) &&;
 
    ext::multimap < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > getTransitionsFromState ( const StateType & from ) const;
 
    ext::multimap < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > getTransitionsToState ( const StateType & to ) const;
 
    auto operator <=> ( const NPDA & other ) const {
        return std::tie(getStates(), getInputAlphabet(), getInitialState(), getFinalStates(), getPushdownStoreAlphabet(), getInitialSymbol(), transitions) <=> std::tie(other.getStates(), other.getInputAlphabet(), other.getInitialState(), other.getFinalStates(), other.getPushdownStoreAlphabet(), other.getInitialSymbol(), other.transitions);
    }
 
    bool operator == ( const NPDA & other ) const {
        return std::tie(getStates(), getInputAlphabet(), getInitialState(), getFinalStates(), getPushdownStoreAlphabet(), getInitialSymbol(), transitions) == std::tie(other.getStates(), other.getInputAlphabet(), other.getInitialState(), other.getFinalStates(), other.getPushdownStoreAlphabet(), other.getInitialSymbol(), other.transitions);
    }
 
    friend ext::ostream & operator << ( ext::ostream & out, const NPDA & instance ) {
        return out << "(NPDA"
               << " states = " << instance.getStates ( )
               << " inputAlphabet = " << instance.getInputAlphabet ( )
               << " initialState = " << instance.getInitialState ( )
               << " finalStates = " << instance.getFinalStates ( )
               << " pushdownStoreAlphabet = " << instance.getPushdownStoreAlphabet ( )
               << " initialSymbol = " << instance.getInitialSymbol ( )
               << " transitions = " << instance.getTransitions ( )
               << ")";
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::NPDA ( ext::set < StateType > states, ext::set < InputSymbolType > inputAlphabet, ext::set < PushdownStoreSymbolType > pushdownStoreAlphabet, StateType initialState, PushdownStoreSymbolType initialSymbol, ext::set < StateType > finalStates ) : core::Components < NPDA, ext::set < InputSymbolType >, component::Set, InputAlphabet, ext::set < PushdownStoreSymbolType >, component::Set, PushdownStoreAlphabet, PushdownStoreSymbolType, component::Value, InitialSymbol, ext::set < StateType >, component::Set, std::tuple < States, FinalStates >, StateType, component::Value, InitialState > ( std::move ( inputAlphabet ), std::move ( pushdownStoreAlphabet ), std::move ( initialSymbol ), std::move ( states ), std::move ( finalStates ), std::move ( initialState ) ) {
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::NPDA(StateType initialState, PushdownStoreSymbolType initialPushdownSymbol) : NPDA ( ext::set < StateType > { initialState }, ext::set < InputSymbolType > { }, ext::set < PushdownStoreSymbolType > { initialPushdownSymbol }, initialState, initialPushdownSymbol, ext::set < StateType > { }) {
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::NPDA ( const DPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & other ) : NPDA ( other.getStates ( ), other.getInputAlphabet ( ), other.getPushdownStoreAlphabet ( ), other.getInitialState ( ), other.getInitialSymbol ( ), other.getFinalStates ( ) ) {
    transitions.insert ( other.getTransitions ( ).begin ( ), other.getTransitions ( ).end ( ) );
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::addTransition(StateType from, common::symbol_or_epsilon < InputSymbolType > input, ext::vector<PushdownStoreSymbolType> pop, StateType to, ext::vector<PushdownStoreSymbolType> push) {
    if (! getStates().count(from))
        throw AutomatonException("State \"" + ext::to_string ( from ) + "\" doesn't exist.");
 
    if ( ! input.is_epsilon ( ) && ! getInputAlphabet().count(input.getSymbol ( ) ) )
        throw AutomatonException("Input symbol \"" + ext::to_string ( input ) + "\" doesn't exist.");
 
    if (! getStates().count(to))
        throw AutomatonException("State \"" + ext::to_string ( to ) + "\" doesn't exist.");
 
    for(const PushdownStoreSymbolType& popSymbol : pop)
        if (! getPushdownStoreAlphabet().count(popSymbol))
            throw AutomatonException("Pushdown store symbol \"" + ext::to_string ( popSymbol ) + "\" doesn't exist.");
 
    for(const PushdownStoreSymbolType& pushSymbol : push)
        if (! getPushdownStoreAlphabet().count(pushSymbol))
            throw AutomatonException("Pushdown store symbol \"" + ext::to_string ( pushSymbol ) + "\" doesn't exist.");
 
    auto upper_bound = transitions.upper_bound ( ext::tie ( from, input, pop ) );
    auto lower_bound = transitions.lower_bound ( ext::tie ( from, input, pop ) );
 
    ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > value = ext::make_pair ( std::move ( to ), std::move ( push ) );
 
    auto iter = std::lower_bound ( lower_bound, upper_bound, value, [ ] ( const auto & transition, const auto & target ) { return transition.second < target; } );
    if ( iter != upper_bound && value >= iter->second )
        return false;
 
    ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > > key ( std::move ( from ), std::move ( input ), std::move ( pop ) );
    transitions.insert ( iter, std::make_pair ( std::move ( key ), std::move ( value ) ) );
    return true;
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::addTransition(StateType from, InputSymbolType input, ext::vector<PushdownStoreSymbolType> pop, StateType to, ext::vector<PushdownStoreSymbolType> push) {
    common::symbol_or_epsilon < InputSymbolType > inputVariant(std::move(input));
    return addTransition(std::move(from), std::move(inputVariant), std::move(pop), std::move(to), std::move(push));
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::addTransition(StateType from, ext::vector<PushdownStoreSymbolType> pop, StateType to, ext::vector<PushdownStoreSymbolType> push) {
    auto inputVariant = common::symbol_or_epsilon < InputSymbolType > ( );
    return addTransition(std::move(from), std::move(inputVariant), std::move(pop), std::move(to), std::move(push));
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::removeTransition(const StateType& from, const common::symbol_or_epsilon < InputSymbolType > & input, const ext::vector<PushdownStoreSymbolType>& pop, const StateType& to, const ext::vector<PushdownStoreSymbolType>& push) {
    auto upper_bound = transitions.upper_bound ( ext::tie ( from, input, pop ) );
    auto lower_bound = transitions.lower_bound ( ext::tie ( from, input, pop ) );
    auto iter = std::find_if ( lower_bound, upper_bound, [ & ] ( const auto & transition ) { return transition.second.first == to && transition.second.second == push; } );
    if ( iter == upper_bound )
        return false;
 
    transitions.erase ( iter );
    return true;
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::removeTransition(const StateType& from, const InputSymbolType& input, const ext::vector<PushdownStoreSymbolType>& pop, const StateType& to, const ext::vector<PushdownStoreSymbolType>& push) {
    common::symbol_or_epsilon < InputSymbolType > inputVariant(input);
    return removeTransition(from, inputVariant, pop, to, push);
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
bool NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::removeTransition(const StateType& from, const ext::vector<PushdownStoreSymbolType>& pop, const StateType& to, const ext::vector<PushdownStoreSymbolType>& push) {
    auto inputVariant = common::symbol_or_epsilon < InputSymbolType > ( );
    return removeTransition(from, inputVariant, pop, to, push);
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
const ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > & NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::getTransitions() const & {
    return transitions;
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > && NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::getTransitions() && {
    return std::move ( transitions );
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::getTransitionsFromState(const StateType& from) const {
    if( ! getStates().count(from) )
        throw AutomatonException("State \"" + ext::to_string ( from ) + "\" doesn't exist");
 
    ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > transitionsFromState;
    for ( const std::pair<const ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > >& transition : transitions) {
        if (std::get<0>(transition.first) == from) {
            transitionsFromState.insert ( transition.first, transition.second );
        }
    }
 
    return transitionsFromState;
}
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >::getTransitionsToState(const StateType& to) const {
    if( ! getStates().count(to))
        throw AutomatonException("State \"" + ext::to_string ( to ) + "\" doesn't exist");
 
    ext::multimap<ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > > transitionsToState;
    for ( const std::pair<const ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > >& transition : transitions) {
        if (transition.second.first == to) {
            transitionsToState.insert ( transition.first, transition.second );
        }
    }
 
    return transitionsToState;
}
 
} /* namespace automaton */
 
namespace core {
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class SetConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, InputSymbolType, automaton::InputAlphabet > {
public:
    static bool used ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const InputSymbolType & symbol ) {
        for ( const std::pair<const ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > >& transition : automaton.getTransitions())
            if ( ! std::get < 1 > ( transition.first ).is_epsilon ( ) && symbol == std::get<1>(transition.first).getSymbol ( ) )
                return true;
 
        return false;
    }
 
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const InputSymbolType & ) {
        return true;
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const InputSymbolType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class SetConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, PushdownStoreSymbolType, automaton::PushdownStoreAlphabet > {
public:
    static bool used ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const PushdownStoreSymbolType & symbol ) {
        if(automaton.getInitialSymbol() == symbol)
            return true;
 
        for ( const std::pair<const ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > >& transition : automaton.getTransitions()) {
            if (std::find(std::get<2>(transition.first).begin(), std::get<2>(transition.first).end(), symbol) != std::get<2>(transition.first).end())
                return true;
 
            if (std::find(transition.second.second.begin(), transition.second.second.end(), symbol) != transition.second.second.end())
                return true;
        }
 
        return false;
    }
 
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const PushdownStoreSymbolType & ) {
        return true;
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const PushdownStoreSymbolType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class ElementConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, PushdownStoreSymbolType, automaton::InitialSymbol > {
public:
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const PushdownStoreSymbolType & symbol ) {
        return automaton.template accessComponent < automaton::PushdownStoreAlphabet > ( ).get ( ).count ( symbol );
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const PushdownStoreSymbolType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class SetConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, StateType, automaton::States > {
public:
    static bool used ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const StateType & state ) {
        if ( automaton.getInitialState ( ) == state )
            return true;
 
        if ( automaton.getFinalStates ( ).count ( state ) )
            return true;
 
        for ( const std::pair<const ext::tuple<StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector<PushdownStoreSymbolType> >, ext::pair<StateType, ext::vector<PushdownStoreSymbolType> > >& transition : automaton.getTransitions()) {
            if (state == std::get<0>(transition.first))
                return true;
            if(transition.second.first == state)
                return true;
        }
 
        return false;
    }
 
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const StateType & ) {
        return true;
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const StateType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class SetConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, StateType, automaton::FinalStates > {
public:
    static bool used ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const StateType & ) {
        return false;
    }
 
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const StateType & state ) {
        return automaton.template accessComponent < automaton::States > ( ).get ( ).count ( state );
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const StateType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
class ElementConstraint< automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType >, StateType, automaton::InitialState > {
public:
    static bool available ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > & automaton, const StateType & state ) {
        return automaton.template accessComponent < automaton::States > ( ).get ( ).count ( state );
    }
 
    static void valid ( const automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > &, const StateType & ) {
    }
};
 
template < class InputSymbolType, class PushdownStoreSymbolType, class StateType >
struct normalize < automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > > {
    static automaton::NPDA < > eval ( automaton::NPDA < InputSymbolType, PushdownStoreSymbolType, StateType > && value ) {
        ext::set < DefaultSymbolType > alphabet = alphabet::SymbolNormalize::normalizeAlphabet ( std::move ( value ).getInputAlphabet ( ) );
        ext::set < DefaultSymbolType > pushdownAlphabet = alphabet::SymbolNormalize::normalizeAlphabet ( std::move ( value ).getPushdownStoreAlphabet ( ) );
        DefaultSymbolType initialSymbol = alphabet::SymbolNormalize::normalizeSymbol ( std::move ( value ).getInitialSymbol ( ) );
        ext::set < DefaultStateType > states = automaton::AutomatonNormalize::normalizeStates ( std::move ( value ).getStates ( ) );
        DefaultStateType initialState = automaton::AutomatonNormalize::normalizeState ( std::move ( value ).getInitialState ( ) );
        ext::set < DefaultStateType > finalStates = automaton::AutomatonNormalize::normalizeStates ( std::move ( value ).getFinalStates ( ) );
 
        automaton::NPDA < > res ( std::move ( states ), std::move ( alphabet ), std::move ( pushdownAlphabet ), std::move ( initialState ), std::move ( initialSymbol ), std::move ( finalStates ) );
 
        for ( std::pair < ext::tuple < StateType, common::symbol_or_epsilon < InputSymbolType >, ext::vector < PushdownStoreSymbolType > >, ext::pair < StateType, ext::vector < PushdownStoreSymbolType > > > && transition : ext::make_mover ( std::move ( value ).getTransitions ( ) ) ) {
            DefaultStateType to = automaton::AutomatonNormalize::normalizeState ( std::move ( transition.second.first ) );
            ext::vector < DefaultSymbolType > push = alphabet::SymbolNormalize::normalizeSymbols ( std::move ( transition.second.second ) );
 
            ext::vector < DefaultSymbolType > pop = alphabet::SymbolNormalize::normalizeSymbols ( std::move ( std::get < 2 > ( transition.first ) ) );
            DefaultStateType from = automaton::AutomatonNormalize::normalizeState ( std::move ( std::get < 0 > ( transition.first ) ) );
            common::symbol_or_epsilon < DefaultSymbolType > input = automaton::AutomatonNormalize::normalizeSymbolEpsilon ( std::move ( std::get < 1 > ( transition.first ) ) );
 
            res.addTransition ( std::move ( from ), std::move ( input ), std::move ( pop ), std::move ( to ), std::move ( push ) );
        }
 
        return res;
    }
};
 
} /* namespace core */
 
extern template class automaton::NPDA < >;