AtomicId.h

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#ifndef PhysicsTools_MVAComputer_AtomicId_h
#define PhysicsTools_MVAComputer_AtomicId_h
// -*- C++ -*-
//
// Package:     MVAComputer
// Class  :     AtomicID
//

//
// Author:  Christophe Saout <christophe.saout@cern.ch>
// Created:     Sat Apr 24 15:18 CEST 2007
//

#include <ostream>
#include <string>

namespace PhysicsTools {

class AtomicId {
    public:
    inline AtomicId() throw() : string(nullptr) {}
    inline AtomicId(const AtomicId &orig) throw() : string(orig.string) {}
    inline AtomicId(const char *arg) throw() : string(lookup(arg)) {}
    inline AtomicId(const std::string &arg) throw() :
        string(lookup(arg.c_str())) {}
    inline ~AtomicId() throw() {}

    inline AtomicId &operator = (const AtomicId &orig) throw()
    { string = orig.string; return *this; }

    inline operator const char *() const throw()
    { return string; }

    inline operator bool() const throw()
    { return string != nullptr; }

    inline operator std::string() const throw()
    { return std::string(string); }

    inline bool operator == (const AtomicId &second) const throw() { return string == second.string; }
    inline bool operator != (const AtomicId &second) const throw() { return string != second.string; }
    inline bool operator <  (const AtomicId &second) const throw() { return string <  second.string; }
    inline bool operator <= (const AtomicId &second) const throw() { return string <= second.string; }
    inline bool operator >  (const AtomicId &second) const throw() { return string >  second.string; }
    inline bool operator >= (const AtomicId &second) const throw() { return string >= second.string; }

    private:
    static AtomicId build(const char *arg) throw() { AtomicId q; q.string = arg; return q; }
    static const char *lookup(const char *arg) throw();

    const char  *string;
};

inline std::ostream &operator << (std::ostream &os, const PhysicsTools::AtomicId &id)
{ return os << (const char*)id; }

} // namespace PhysicsTools

#endif // PhysicsTools_MVAComputer_AtomicId_h