120 lines
3.8 KiB
120 lines
3.8 KiB
//==============================================================================
|
|
//
|
|
// Copyright (c) 2015-
|
|
// Authors:
|
|
// * Joachim Klein <klein@tcs.inf.tu-dresden.de>
|
|
// * David Mueller <david.mueller@tcs.inf.tu-dresden.de>
|
|
//
|
|
//------------------------------------------------------------------------------
|
|
//
|
|
// This file is part of the cpphoafparser library,
|
|
// http://automata.tools/hoa/cpphoafparser/
|
|
//
|
|
// The cpphoafparser library is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 2.1 of the License, or (at your option) any later version.
|
|
//
|
|
// The cpphoafparser library 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
|
|
// Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License along with this library; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
//
|
|
//==============================================================================
|
|
|
|
#ifndef CPPHOAFPARSER_ATOMLABEL_HH
|
|
#define CPPHOAFPARSER_ATOMLABEL_HH
|
|
|
|
#include <memory>
|
|
#include <string>
|
|
#include <iostream>
|
|
|
|
namespace cpphoafparser {
|
|
|
|
/**
|
|
* Atom of a label expression (either an atomic proposition index or an alias reference)
|
|
*/
|
|
class AtomLabel {
|
|
public:
|
|
/** A shared_ptr wrapping an AtomLabel */
|
|
typedef std::shared_ptr<AtomLabel> ptr;
|
|
|
|
/** Static constructor for an atomic proposition atom */
|
|
static AtomLabel::ptr createAPIndex(unsigned int apIndex) {
|
|
return AtomLabel::ptr(new AtomLabel(apIndex));
|
|
}
|
|
|
|
/** Static constructor for an alias reference (name has to be without leading @) */
|
|
static AtomLabel::ptr createAlias(const std::string name) {
|
|
return AtomLabel::ptr(new AtomLabel(name));
|
|
}
|
|
|
|
/** Copy constructor. */
|
|
AtomLabel(const AtomLabel& other) : apIndex(0), aliasName(nullptr) {
|
|
if (other.isAlias()) {
|
|
aliasName = std::shared_ptr<std::string>(new std::string(*other.aliasName));
|
|
} else {
|
|
apIndex = other.apIndex;
|
|
}
|
|
}
|
|
|
|
/** Returns true if this atom is an alias reference */
|
|
bool isAlias() const {return (bool)aliasName;}
|
|
|
|
/**
|
|
* Returns the alias name (for an alias reference atom).
|
|
* May only be called if `isAlias() == true`.
|
|
*/
|
|
const std::string& getAliasName() const {
|
|
if (!isAlias()) {throw std::logic_error("Illegal access");}
|
|
return *aliasName;
|
|
}
|
|
|
|
/**
|
|
* Returns the atomic proposition index (for an AP atom).
|
|
* May only be called if `isAlias() == false`.
|
|
*/
|
|
unsigned int getAPIndex() const {
|
|
if (isAlias()) {throw std::logic_error("Illegal access");}
|
|
return apIndex;
|
|
}
|
|
|
|
/** Output operator, renders in HOA syntax */
|
|
friend std::ostream& operator<<(std::ostream& out, const AtomLabel& atom) {
|
|
if (atom.isAlias()) {
|
|
out << "@" << *atom.aliasName;
|
|
} else {
|
|
out << atom.apIndex;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
/** Equality operator. */
|
|
bool operator==(const AtomLabel& other) const {
|
|
if (isAlias()) {
|
|
return other.isAlias() && getAliasName() == other.getAliasName();
|
|
} else {
|
|
return !other.isAlias() && getAPIndex() == other.getAPIndex();
|
|
}
|
|
}
|
|
|
|
|
|
private:
|
|
/** The AP index (if applicable) */
|
|
unsigned int apIndex;
|
|
/** The aliasName (empty pointer if AP atom) */
|
|
std::shared_ptr<std::string> aliasName;
|
|
|
|
/** Private constructor (AP atom) */
|
|
AtomLabel(unsigned int apIndex) : apIndex(apIndex), aliasName(nullptr) {}
|
|
/** Private constructor (alias reference atom) */
|
|
AtomLabel(const std::string& name) : apIndex(0), aliasName(new std::string(name)) {}
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|