EpsilonRemoverOutgoing.h

Go to the documentation of this file.

 
#pragma once
 
#include <map>
#include <algorithm>
 
#include <automaton/FSM/EpsilonNFA.h>
#include <automaton/FSM/MultiInitialStateNFA.h>
#include <automaton/FSM/NFA.h>
#include <automaton/FSM/DFA.h>
 
#include "../../properties/efficient/AllEpsilonClosure.h"
 
namespace automaton {
 
namespace simplify {
 
namespace efficient {
 
class EpsilonRemoverOutgoing {
public:
    template < class StateType, class SymbolType >
    static automaton::MultiInitialStateNFA < SymbolType, StateType > remove ( const automaton::EpsilonNFA < SymbolType, StateType > & fsm );
    template < class StateType, class SymbolType >
    static automaton::MultiInitialStateNFA < SymbolType, StateType > remove ( const automaton::MultiInitialStateNFA < SymbolType, StateType > & fsm );
    template < class StateType, class SymbolType >
    static automaton::NFA < SymbolType, StateType > remove ( const automaton::NFA < SymbolType, StateType > & fsm );
    template < class StateType, class SymbolType >
    static automaton::DFA < SymbolType, StateType > remove ( const automaton::DFA < SymbolType, StateType > & fsm );
};
 
template < class StateType, class SymbolType >
automaton::DFA < SymbolType, StateType > EpsilonRemoverOutgoing::remove ( const automaton::DFA < SymbolType, StateType > & fsm) {
    return fsm;
}
 
template < class StateType, class SymbolType >
automaton::MultiInitialStateNFA < SymbolType, StateType > EpsilonRemoverOutgoing::remove ( const automaton::MultiInitialStateNFA < SymbolType, StateType > & fsm) {
    return fsm;
}
 
template < class StateType, class SymbolType >
automaton::NFA < SymbolType, StateType > EpsilonRemoverOutgoing::remove ( const automaton::NFA < SymbolType, StateType > & fsm) {
    return fsm;
}
 
template < class StateType, class SymbolType >
automaton::MultiInitialStateNFA < SymbolType, StateType > EpsilonRemoverOutgoing::remove ( const automaton::EpsilonNFA < SymbolType, StateType > & fsm ) {
    automaton::MultiInitialStateNFA < SymbolType, StateType > res;
    res.setStates ( fsm.getStates ( ) );
    res.setFinalStates ( fsm.getFinalStates ( ) );
    res.setInputAlphabet ( fsm.getInputAlphabet ( ) );
 
    ext::map < StateType, ext::set < StateType > > closures = automaton::properties::efficient::AllEpsilonClosure::allEpsilonClosure ( fsm );
 
    ext::multimap < ext::pair < StateType, SymbolType >, StateType > transitions = fsm.getSymbolTransitions ( );
 
    for ( const std::pair < const ext::pair < StateType, SymbolType >, StateType > & transition : transitions )
        for ( const StateType & toClosure : closures [ transition.second ] )
            res.addTransition ( transition.first.first, transition.first.second, toClosure );
 
    const ext::set < StateType > & cl = closures [ fsm.getInitialState ( ) ];
    res.setInitialStates ( cl );
 
    return res;
}
 
} /* namespace efficient */
 
} /* namespace simplify */
 
} /* namespace automaton */