Classes and Instances 27

test/all.d

@@ -16,6 +16,7 @@ void main(){
 	"./test/for.lox".match("1 2 1 2 3 ".replace(' ', '\n'));
 	"./test/ifelse.lox".match("a1 b2 c3 ".replace(' ', '\n'));
 	"./test/while.lox".match("1 2  3 2 1  0 1  1 2  3 2 1  0 1 ".replace(' ', '\n'));
+	"./test/fields.lox".match("0 10 ".replace(' ', '\n'));
 
 	"./test/ops.lox".match("1\n2\n3\n4\n5\n6\n7\ntrue\nfalse\ntrue\ntrue\nhello, world\n");
 	"./test/shortcircuit.lox".match("true\nAAAA!\nAAAA!\nAAAA?\n");

test/fields.lox

@@ -0,0 +1,48 @@
+
+class Obj{}
+
+var p = Obj();
+p.length = 0;
+p.next = nil;
+
+fun append(p, item){
+	p.length = p.length + 1;
+	var n = Obj();
+	n.next = p.next;
+	p.next = n;
+}
+fun walk(p){
+	class Res{}
+	var n = p;
+	var d = 0;
+	while(n.next){
+		n = n.next;
+		d = d + 1;
+	}
+	var r = Res();
+	r.item = n;
+	r.depth = d;
+	return r;
+}
+fun max(a, b){
+	if(a > b)
+		return a;
+	return b;
+}
+
+var sum = 0;
+var maxLength = 0;
+
+for(var i = 0; i < 10; i = i + 1){
+	append(p, Obj());
+	sum = sum + p.length;
+	var res = walk(p);
+	sum = sum - res.depth;
+	maxLength = max(maxLength, p.length);
+}
+
+
+print sum;
+print maxLength;
+
+