1 files changed, 41 insertions, 0 deletions
diff --git a/src/library/scala/runtime/StringAdd.scala b/src/library/scala/runtime/StringAdd.scala
new file mode 100644
index 0000000000..272e2cbb08
--- /dev/null
+++ b/src/library/scala/runtime/StringAdd.scala
@@ -0,0 +1,41 @@
+/*                                                                      *\
+**     ________ ___   __   ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2002-2007, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ |_|                                         **
+**                                                                      **
+\*                                                                      */
+
+// $Id$
+
+
+package scala.runtime
+
+
+import Predef._
+
+object StringAdd {
+  // Needed for the format hack. Can be removed once we drop 1.4
+  lazy val formatMethod: java.lang.reflect.Method = {
+    val paramTypes = Array[Class[T] forSome { type T }](classOf[String], classOf[Array[Object]])
+    classOf[String].getDeclaredMethod("format", paramTypes)
+  }
+}
+final class StringAdd(self: Any) {
+
+  def +(other: String) = self.toString + other
+
+  /** Returns string formatted according to given <code>format</code> string.
+   *  Format strings are as for <code>String.format</code>
+   *  (@see java.lang.String.format).
+   *  Only works on Java 1.5 or higher!
+   */
+  def formatted(format: String): String = {
+    // This should be:
+    // String.format(format, Array(self.asInstanceOf[Object]))
+    // However, the line above does not compile on Java 1.4 because String.format exists only in 1.5
+    // Therefore, we do the following hack:
+    val args = Array(self.asInstanceOf[Object])
+    StringAdd.formatMethod.invoke(null, Array[Object](format, args)).asInstanceOf[String]
+  }
+}