stage1 部分功能测试00,01,02,06成功

stage1/test12.spl

@@ -0,0 +1,27 @@
+
+fn main() i32 {
+    /* address-of and postfix deref */
+    var x := 42;
+    var p := &x;
+    var v := p.*;
+    if v != 42 { ret 1; }
+
+    /* null pointer */
+    var np: *i32 = null;
+    if np != null { ret 2; }
+    if np == null {} else { ret 3; }
+
+    /* pointer to struct — auto-deref on .field */
+    type Point = struct {
+        a: i32,
+        b: i32,
+    };
+    var pt: Point;
+    pt.a = 10;
+    pt.b = 20;
+    var pp := &pt;
+    if pp.a != 10 { ret 4; }
+    if pp.b != 20 { ret 5; }
+
+    ret 0;
+}