AutomataConcatenationEpsilonTransition.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 <automaton/FSM/EpsilonNFA.h>
 
namespace automaton {
 
namespace transform {
 
class AutomataConcatenationEpsilonTransition {
public:
    template < class SymbolType, class StateType >
    static automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > concatenation(const automaton::DFA < SymbolType, StateType > & first, const automaton::DFA < SymbolType, StateType > & second);
 
    template < class SymbolType, class StateType >
    static automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > concatenation(const automaton::NFA < SymbolType, StateType > & first, const automaton::NFA < SymbolType, StateType > & second);
 
    template < class SymbolType, class StateType >
    static automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > concatenation(const automaton::EpsilonNFA < SymbolType, StateType > & first, const automaton::EpsilonNFA < SymbolType, StateType > & second);
};
 
template < class SymbolType, class StateType >
automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > AutomataConcatenationEpsilonTransition::concatenation(const automaton::DFA < SymbolType, StateType > & first, const automaton::DFA < SymbolType, StateType > & second) {
    unsigned firstDefault = 1;
    unsigned secondDefault = 2;
 
    automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > res ( ext::make_pair ( first.getInitialState ( ), firstDefault ) );
 
    res.addInputSymbols ( first.getInputAlphabet ( ) );
    res.addInputSymbols ( second.getInputAlphabet ( ) );
 
    for ( const StateType & q : first.getStates ( ) )
        res.addState ( ext::make_pair ( q, firstDefault ) );
    for ( const StateType & q : second.getStates ( ) )
        res.addState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const StateType & q : second.getFinalStates ( ) )
        res.addFinalState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const auto & t : first.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, firstDefault ), t.first.second, ext::make_pair ( t.second, firstDefault ) );
 
    for ( const auto & t : second.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, secondDefault ), t.first.second, ext::make_pair ( t.second, secondDefault ) );
 
    for ( const StateType & q : first.getFinalStates ( ) )
        res.addTransition ( ext::make_pair ( q, firstDefault ), ext::make_pair ( second.getInitialState ( ), secondDefault ) );
 
    return res;
}
 
template < class SymbolType, class StateType >
automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > AutomataConcatenationEpsilonTransition::concatenation(const automaton::NFA < SymbolType, StateType > & first, const automaton::NFA < SymbolType, StateType > & second) {
    unsigned firstDefault = 1;
    unsigned secondDefault = 2;
 
    automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > res ( ext::make_pair ( first.getInitialState ( ), firstDefault ) );
 
    res.addInputSymbols ( first.getInputAlphabet ( ) );
    res.addInputSymbols ( second.getInputAlphabet ( ) );
 
    for ( const StateType & q : first.getStates ( ) )
        res.addState ( ext::make_pair ( q, firstDefault ) );
    for ( const StateType & q : second.getStates ( ) )
        res.addState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const StateType & q : second.getFinalStates ( ) )
        res.addFinalState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const auto & t : first.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, firstDefault ), t.first.second, ext::make_pair ( t.second, firstDefault ) );
 
    for ( const auto & t : second.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, secondDefault ), t.first.second, ext::make_pair ( t.second, secondDefault ) );
 
    for ( const StateType & q : first.getFinalStates ( ) )
        res.addTransition ( ext::make_pair ( q, firstDefault ), ext::make_pair ( second.getInitialState ( ), secondDefault ) );
 
    return res;
}
 
template < class SymbolType, class StateType >
automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > AutomataConcatenationEpsilonTransition::concatenation(const automaton::EpsilonNFA < SymbolType, StateType > & first, const automaton::EpsilonNFA < SymbolType, StateType > & second) {
    unsigned firstDefault = 1;
    unsigned secondDefault = 2;
 
    automaton::EpsilonNFA < SymbolType, ext::pair < StateType, unsigned > > res ( ext::make_pair ( first.getInitialState ( ), firstDefault ) );
 
    res.addInputSymbols ( first.getInputAlphabet ( ) );
    res.addInputSymbols ( second.getInputAlphabet ( ) );
 
    for ( const StateType & q : first.getStates ( ) )
        res.addState ( ext::make_pair ( q, firstDefault ) );
    for ( const StateType & q : second.getStates ( ) )
        res.addState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const StateType & q : second.getFinalStates ( ) )
        res.addFinalState ( ext::make_pair ( q, secondDefault ) );
 
    for ( const auto & t : first.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, firstDefault ), t.first.second, ext::make_pair ( t.second, firstDefault ) );
 
    for ( const auto & t : second.getTransitions ( ) )
        res.addTransition ( ext::make_pair ( t.first.first, secondDefault ), t.first.second, ext::make_pair ( t.second, secondDefault ) );
 
    for ( const StateType & q : first.getFinalStates ( ) )
        res.addTransition ( ext::make_pair ( q, firstDefault ), ext::make_pair ( second.getInitialState ( ), secondDefault ) );
 
    return res;
}
 
} /* namespace transform */
 
} /* namespace automaton */