import edu.berkeley.sbp.*;
import edu.berkeley.sbp.util.*;
-/** a token of input -- note that this represents an <i>actual input token</i> rather than an <tt>Element</tt> which <i>matches</i> a token */
-public interface Input<Tok> {
+/** a stream of tokens to be parsed */
+public interface Input<Token> {
- public Tok next(int numstates, int resets, int waits) throws IOException;
- public abstract Location getLocation();
+ /** returns the token just beyond the current location and advances beyond it */
+ public Token next() throws IOException;
- /** a location *between tokens* in the input stream */
- public static interface Location {
+ /** returns the location the input stream is currently at */
+ public Location<Token> getLocation();
+
+ /** a location <i>between tokens<i> in the input stream */
+ public static interface Location<Tok> extends Comparable<Location> {
public String toString();
+ public Region<Tok> createRegion(Location<Tok> loc);
}
+
+ public static interface Region<Tok> /* implements Topology<Location<Tok>> */ { }
}