--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/source/SourceLineLocation.java	Tue Dec 17 20:22:45 2013 -0800
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.api.source;
+
+import com.oracle.truffle.api.*;
+
+/**
+ * A specification for a location in guest language source, expressed as a line number in a specific
+ * instance of {@link Source}, suitable for hash table keys with equality defined in terms of
+ * content.
+ */
+public class SourceLineLocation implements Comparable {
+
+    private final Source source;
+    private final int line;
+
+    public SourceLineLocation(Source source, int line) {
+        assert source != null;
+        assert source != SourceSection.NULL;
+        this.source = source;
+        this.line = line;
+    }
+
+    public Source getSource() {
+        return source;
+    }
+
+    public int getLine() {
+        return line;
+    }
+
+    @Override
+    public String toString() {
+        return "SourceLine [" + source.getName() + ", " + line + "]";
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + line;
+        result = prime * result + source.hashCode();
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (!(obj instanceof SourceLineLocation)) {
+            return false;
+        }
+        SourceLineLocation other = (SourceLineLocation) obj;
+        if (line != other.line) {
+            return false;
+        }
+        return source.equals(other.source);
+    }
+
+    @Override
+    public int compareTo(Object o) {
+        final SourceLineLocation other = (SourceLineLocation) o;
+        final int nameOrder = source.getName().compareTo(other.source.getName());
+        if (nameOrder != 0) {
+            return nameOrder;
+        }
+        return Integer.compare(line, other.line);
+    }
+
+}