1 // Copyright 2006 all rights reserved; see LICENSE file for BSD-style license
3 package edu.berkeley.sbp;
6 import java.lang.reflect.*;
7 import java.lang.ref.*;
8 import edu.berkeley.sbp.*;
9 import edu.berkeley.sbp.util.*;
11 /** <font color=purple>a stream of <tt>Token</tt>s to be parsed</font> */
12 public interface Input<Token> {
14 /** returns the token just beyond the current location and advances beyond it */
15 public Token next() throws IOException;
17 /** returns the location the input stream is currently at */
18 public Location<Token> getLocation();
20 /** <font color=purple>a location (position) in the input stream -- <i>between tokens</i></font> */
21 public static interface Location<Token> extends Comparable<Location> {
23 /** return the region between this location and <tt>loc</tt> */
24 public Region<Token> createRegion(Location<Token> loc);
26 public String toString();
29 /** <font color=purple>a contiguous set of <tt>Location</tt>s</font> */
30 public static interface Region<Token> /* implements Topology<Location<Tok>> */ {