1 files changed, 40 insertions, 0 deletions
diff --git a/src/library/scala/runtime/Comparator.java b/src/library/scala/runtime/Comparator.java
new file mode 100644
index 0000000000..b090d5052e
--- /dev/null
+++ b/src/library/scala/runtime/Comparator.java
@@ -0,0 +1,40 @@
+package scala.runtime;
+
+public class Comparator {
+
+    /* A rich implementation of the equals method that overrides the default equals because Java's boxed primitives are
+     * utterly broken. This equals is inserted instead of a normal equals by the Scala compiler (in the icode phase,
+     * method genEqEqPrimitive) only when either side of the comparison is a subclass of AnyVal, of java.lang.Number, of
+     * java.lang.Character or is exactly Any or AnyRef. */
+    public static boolean equals(Object a, Object b) {
+        if (a == null)
+            return b == null;
+        else if (a.equals(b))
+            return true;
+        else if (a == b)
+            return true;
+        else if ((a instanceof Byte || a instanceof Short || a instanceof Integer) && b instanceof Number)
+            return ((Number)a).intValue() == ((Number)b).intValue();
+        else if (a instanceof Number && (b instanceof Byte || b instanceof Short || b instanceof Integer))
+            return ((Number)a).intValue() == ((Number)b).intValue();
+        else if (a instanceof Long && b instanceof Number)
+            return ((Long)a).longValue() == ((Number)b).longValue();
+        else if (a instanceof Number && b instanceof Long)
+            return ((Number)a).longValue() == ((Long)b).longValue();
+        else if (a instanceof Float && b instanceof Number)
+            return ((Float)a).floatValue() == ((Number)b).floatValue();
+        else if (a instanceof Number && b instanceof Float)
+            return ((Number)a).floatValue() == ((Float)b).floatValue();
+        else if (a instanceof Number && b instanceof Number)
+            return ((Number)a).doubleValue() == ((Number)b).doubleValue();
+        else if (a instanceof Number && b instanceof Character)
+            return ((Number)a).intValue() == ((Character)b).charValue();
+        else if (a instanceof Character && b instanceof Number)
+            return ((Character)a).charValue() == ((Number)b).intValue();
+        else if (a instanceof Character && b instanceof Character)
+            return ((Character)a).charValue() == ((Character)b).charValue();
+        else
+            return false;
+    }
+
+}