added a helper method for easily converting from a nullable type to a non nullable type with a non-lazy value, or lazy factory function

testlib/test/GetOrElseTest.kt

@@ -0,0 +1,39 @@
+package test.standard
+
+import std.*
+import stdhack.test.*
+import stdhack.test.assertEquals
+
+class GetOrElseTest() : TestSupport() {
+    val v1: String? = "hello"
+    val v2: String? = null
+
+    fun testDefaultValue() {
+        /**
+        TODO compiler error?
+
+        assertEquals("hello", v1.getOrElse("bar"))
+        assertEquals("bar", v2.getOrElse("bar"))
+
+        expect("hello") {
+            v1.getOrElse("bar")
+        }
+        expect("bar") {
+            v2.getOrElse("bar")
+        }
+        */
+    }
+
+    fun testLazyDefaultValue() {
+        var counter = 0
+
+        /**
+        TODO compiler error?
+        assertEquals("hello", v1.getOrElse{ counter++; "bar"}
+        assertEquals(counter, 0, "counter should not be incremented yet")
+
+        assertEquals("bar", v2.getOrElse{ counter++; "bar"}
+        assertEquals(counter, 1, "counter should be incremented in the default function")
+        */
+    }
+}