First cut function ptr type

1 files changed, 36 insertions, 0 deletions

diff --git a/chapter18/src/test/java/com/seaofnodes/simple/Chapter18Test.java b/chapter18/src/test/java/com/seaofnodes/simple/Chapter18Test.java
new file mode 100644
index 00000000..2c6cca8c
--- /dev/null
+++ b/chapter18/src/test/java/com/seaofnodes/simple/Chapter18Test.java
@@ -0,0 +1,36 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.evaluator.Evaluator;
+import com.seaofnodes.simple.node.StopNode;
+import org.junit.Test;
+import org.junit.Ignore;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class Chapter18Test {
+
+    @Test
+    public void testJig() {
+        Parser parser = new Parser("""
+return 3.14;
+""");
+        StopNode stop = parser.parse().iterate();
+        assertEquals("return 3.14;", stop.toString());
+        assertEquals(3.14, Evaluator.evaluate(stop,  0));
+    }
+
+
+    // ---------------------------------------------------------------
+    @Test
+    public void testType0() {
+        Parser parser = new Parser("""
+{int -> int}? x2 = null; // null function ptr
+return x2;
+""");
+        StopNode stop = parser.parse().iterate();
+        assertEquals("return arg;", stop.toString());
+        assertEquals(0L, Evaluator.evaluate(stop, 0));
+    }
+
+
+}