// Path: src/main/java/jhilbert/scanners/ScannerException.java
// public class ScannerException extends JHilbertException {
// 
// 	/**
// 	 * Scanner which created the exception.
// 	 */
// 	private final Scanner scanner;
// 
// 	/**
// 	 * Creates a new <code>ScannerException</code> with the specified
// 	 * detail message. This constructor should only be used by a
// 	 * {@link Scanner}, which the constructor is provided with.
// 	 *
// 	 * @param message detail message.
// 	 * @param scanner the scanner which created the exception.
// 	 */
// 	public ScannerException(final String message, final Scanner scanner) {
// 		this(message, scanner, null);
// 	}
// 
// 	/**
// 	 * Creates a new <code>ScannerException</code> with the specified
// 	 * detail message and cause.
// 	 * This constructor should only be used by a {@link Scanner}, which
// 	 * the constructor is provided with.
// 	 *
// 	 * @param message detail message.
// 	 * @param scanner the scanner which created the exception.
// 	 * @param cause the cause. (A <code>null</code> value is permitted, and
// 	 * 	indicates that the cause is nonexistent or unknown.)
// 	 */
// 	public ScannerException(final String message, final Scanner scanner, final Throwable cause) {
// 		super(message, cause);
// 		this.scanner = scanner;
// 	}
// 
// 	/**
// 	 * Obtains the scanner which caused this exception.
// 	 *
// 	 * @return scanner which caused this exception.
// 	 */
// 	public final Scanner getScanner() {
// 		return scanner;
// 	}
// 
// }
// 
// Path: src/main/java/jhilbert/scanners/Token.java
// public interface Token {
// 
// 	/**
// 	 * Token classes.
// 	 */
// 	public static enum Class {
// 
// 		/**
// 		 * Beginning of a LISP list.
// 		 */
// 		BEGIN_EXP,
// 
// 		/**
// 		 * End of a LISP list.
// 		 */
// 		END_EXP,
// 
// 		/**
// 		 * Atomic LISP symbolic expression.
// 		 */
// 		ATOM
// 
// 	}
// 
// 	/**
// 	 * Valid ATOM tokens.
// 	 */
// 	public static final Pattern VALID_ATOM
// 		= Pattern.compile("[^\\p{Cn}\\p{Cf}\\p{Cc}\\p{Zs}\\p{Zl}\\p{Zp}\\t\\(\\)\\r\\n\\#]+");
// 
// 	/**
// 	 * Obtains a string representation of this token.
// 	 *
// 	 * @return string representation of this token.
// 	 */
// 	public String getTokenString();
// 
// 	/**
// 	 * Obtains the class of this token.
// 	 *
// 	 * @return class of this token.
// 	 */
// 	public Class getTokenClass();
// 
// }


import java.io.InputStream;
import jhilbert.scanners.ScannerException;
import jhilbert.scanners.Token;
import org.apache.log4j.Logger;
/*
    JHilbert, a verifier for collaborative theorem proving

    Copyright © 2008, 2009, 2011 The JHilbert Authors
      See the AUTHORS file for the list of JHilbert authors.
      See the commit logs ("git log") for a list of individual contributions.

    This program 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.

    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

    You may contact the author on this Wiki page:
    http://www.wikiproofs.de/w/index.php?title=User_talk:GrafZahl
*/

package jhilbert.scanners.impl;




/**
 * A token feed for stream I/O.
 */
final class StreamTokenFeed extends AbstractTokenFeed {

	/**
	 * Logger for this class.
	 */
	private static final Logger logger = Logger.getLogger(StreamTokenFeed.class);

	/**
	 * Character scanner.
	 */
	private final CharScanner charScanner;

	/**
	 * Creates a new <code>StreamTokenFeed</code> for the specified input
	 * stream.
	 *
	 * @param in input stream.
	 *
	 * @throws ScannerException if the underlying character scanner cannot
	 * 	be set up.
	 */
// Path: src/main/java/jhilbert/scanners/ScannerException.java
// public class ScannerException extends JHilbertException {
// 
// 	/**
// 	 * Scanner which created the exception.
// 	 */
// 	private final Scanner scanner;
// 
// 	/**
// 	 * Creates a new <code>ScannerException</code> with the specified
// 	 * detail message. This constructor should only be used by a
// 	 * {@link Scanner}, which the constructor is provided with.
// 	 *
// 	 * @param message detail message.
// 	 * @param scanner the scanner which created the exception.
// 	 */
// 	public ScannerException(final String message, final Scanner scanner) {
// 		this(message, scanner, null);
// 	}
// 
// 	/**
// 	 * Creates a new <code>ScannerException</code> with the specified
// 	 * detail message and cause.
// 	 * This constructor should only be used by a {@link Scanner}, which
// 	 * the constructor is provided with.
// 	 *
// 	 * @param message detail message.
// 	 * @param scanner the scanner which created the exception.
// 	 * @param cause the cause. (A <code>null</code> value is permitted, and
// 	 * 	indicates that the cause is nonexistent or unknown.)
// 	 */
// 	public ScannerException(final String message, final Scanner scanner, final Throwable cause) {
// 		super(message, cause);
// 		this.scanner = scanner;
// 	}
// 
// 	/**
// 	 * Obtains the scanner which caused this exception.
// 	 *
// 	 * @return scanner which caused this exception.
// 	 */
// 	public final Scanner getScanner() {
// 		return scanner;
// 	}
// 
// }
// 
// Path: src/main/java/jhilbert/scanners/Token.java
// public interface Token {
// 
// 	/**
// 	 * Token classes.
// 	 */
// 	public static enum Class {
// 
// 		/**
// 		 * Beginning of a LISP list.
// 		 */
// 		BEGIN_EXP,
// 
// 		/**
// 		 * End of a LISP list.
// 		 */
// 		END_EXP,
// 
// 		/**
// 		 * Atomic LISP symbolic expression.
// 		 */
// 		ATOM
// 
// 	}
// 
// 	/**
// 	 * Valid ATOM tokens.
// 	 */
// 	public static final Pattern VALID_ATOM
// 		= Pattern.compile("[^\\p{Cn}\\p{Cf}\\p{Cc}\\p{Zs}\\p{Zl}\\p{Zp}\\t\\(\\)\\r\\n\\#]+");
// 
// 	/**
// 	 * Obtains a string representation of this token.
// 	 *
// 	 * @return string representation of this token.
// 	 */
// 	public String getTokenString();
// 
// 	/**
// 	 * Obtains the class of this token.
// 	 *
// 	 * @return class of this token.
// 	 */
// 	public Class getTokenClass();
// 
// }


// Path: src/main/java/jhilbert/scanners/impl/StreamTokenFeed.java
import java.io.InputStream;
import jhilbert.scanners.ScannerException;
import jhilbert.scanners.Token;
import org.apache.log4j.Logger;

/*
    JHilbert, a verifier for collaborative theorem proving

    Copyright © 2008, 2009, 2011 The JHilbert Authors
      See the AUTHORS file for the list of JHilbert authors.
      See the commit logs ("git log") for a list of individual contributions.

    This program 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.

    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

    You may contact the author on this Wiki page:
    http://www.wikiproofs.de/w/index.php?title=User_talk:GrafZahl
*/

package jhilbert.scanners.impl;




/**
 * A token feed for stream I/O.
 */
final class StreamTokenFeed extends AbstractTokenFeed {

	/**
	 * Logger for this class.
	 */
	private static final Logger logger = Logger.getLogger(StreamTokenFeed.class);

	/**
	 * Character scanner.
	 */
	private final CharScanner charScanner;

	/**
	 * Creates a new <code>StreamTokenFeed</code> for the specified input
	 * stream.
	 *
	 * @param in input stream.
	 *
	 * @throws ScannerException if the underlying character scanner cannot
	 * 	be set up.
	 */
	StreamTokenFeed(final InputStream in) throws ScannerException {