📝 improve maintainability

test/class.nas

@@ -1,12 +1,13 @@
-var student = func(n,a) {
+var student = func(n, a) {
     return {
-        print_info:func println(n,' ',a),
-        set_age:   func(age) a=age,
-        get_age:   func return a,
-        set_name:  func(name) n=name,
-        get_name:  func return n
+        print_info: func println(n,' ',a),
+        set_age:    func(age) a=age,
+        get_age:    func return a,
+        set_name:   func(name) n=name,
+        get_name:   func return n
     };
 }
+
 var s=student('valk',24);
 s.print_info();
 println(s.get_age(),' ',s.get_name());
@@ -18,6 +19,7 @@ s.set_age(20);
 s.set_name('Sidi Liang');
 s.print_info();
 println(s.get_age(),' ',s.get_name());
+
 # flightgear nasal-console cannot use this kind of object initializing
 var m = func() {
     var (_1,_2)=(0,1);

test/scalar.nas

@@ -250,4 +250,20 @@ var test_single_id_iterator = 0;
 
 foreach(test_single_id_iterator; [0, 1, 2, 3]) {
     println(test_single_id_iterator);
-}
+}
+
+# simple closure test, make sure two functions share the same closure
+var closure_tester = func() {
+    var b = 0;
+    return [
+        func { b += 1; },
+        func { return b; }
+    ];
+}();
+
+for(var i = 1; i<=10; i += 1) {
+    closure_tester[0]();
+    if (closure_tester[1]()!=i) {
+        die("test failed: expect " ~ i ~ ", but get " ~ closure_tester[1]());
+    }
+}