Initial data commit

Task/Call-a-function/Ecstasy/call-a-function-8.ecstasy

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+// Ecstasy does not have any built-in functions. However, there are two keywords
+// ("is" and "as") that use a function-like syntax:
+module IsAndAs {
+    Int|String foo() {
+        return "hello";
+    }
+
+    void run() {
+        @Inject Console console;
+        Object o = foo();
+        if (o.is(String)) {             // <- looks like a function call
+            String s = o.as(String);    // <- looks like a function call
+            console.print($"foo returned the string: {s.quoted()}");
+        }
+    }
+}