X-Git-Url: http://git.megacz.com/?p=sbp.git;a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FAmbiguous.java;h=8f7fb249225caa5b2aae658b1ea35aae5c5fe89c;hp=6288f1fd245e3c45cde34ddf48b232cf7a247557;hb=HEAD;hpb=5ae7d4fd7c53dab6df9aae2e42579efabf66f49e

diff --git a/src/edu/berkeley/sbp/Ambiguous.java b/src/edu/berkeley/sbp/Ambiguous.java
index 6288f1f..8f7fb24 100644
--- a/src/edu/berkeley/sbp/Ambiguous.java
+++ b/src/edu/berkeley/sbp/Ambiguous.java
@@ -1,24 +1,30 @@
+// Copyright 2006-2007-2007 all rights reserved; see LICENSE file for BSD-style license
+
 package edu.berkeley.sbp;
-import edu.berkeley.sbp.*;
 import edu.berkeley.sbp.util.*;
-import edu.berkeley.sbp.Sequence.Position;
-import java.io.*;
 import java.util.*;
 
-/** if ambiguity checking is enabled, this exception is thrown to signal that the parse was ambiguous */
+/** thrown to signal that a parse was ambiguous */
 public class Ambiguous extends Exception {
-    public final Forest<?> ambiguity;
-    private final HashSet<Tree<?>> ht;
-    public Ambiguous(Forest<?> ambiguity, HashSet<Tree<?>> ht) {
+
+    private final Forest<?> ambiguity;
+    private final HashSet<Tree<?>> possibilities;
+
+    /**
+     *  @param possibilities is a specially-constructed set of trees with shared nodes replaced by '*'
+     */
+    Ambiguous(Forest<?> ambiguity, HashSet<Tree<?>> possibilities) {
         this.ambiguity = ambiguity;
-        this.ht = ht;
+        this.possibilities = possibilities;
     }
+
+    public Forest<?> getForest() { return ambiguity; }
+
     public String toString() {
-        // FIXME: print the input region that was ambiguously matched
         StringBuffer sb = new StringBuffer();
-        sb.append("unresolved ambiguity; shared subtrees are shown as \"*\" ");
-        for(Tree<?> result : ht) {
-            sb.append("\n  possibility: ");
+        sb.append("unresolved ambiguity at "+ambiguity.getRegion()+"; shared subtrees are shown as \"*\" ");
+        for(Tree<?> result : possibilities) {
+            sb.append("\n    possibility: ");
             StringBuffer sb2 = new StringBuffer();
             result.toPrettyString(sb2);
             sb.append(StringUtil.indent(sb2.toString(), 15));