Tue, 16 Aug 2016 21:41:28 -0700
Added tag jdk8u102-b33 for changeset 36e3c21b5fca
1 /*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
24 /*
25 * NASHORN-759 - Efficient string concatenation with + operator
26 *
27 * @test
28 * @run
29 */
31 // Check invalidation of callsite for non-string CharSequence
32 function checkProps(s) {
33 print(typeof s);
34 print(typeof s.length);
35 print(s.charCodeAt === String.prototype.charCodeAt);
36 print();
37 }
39 var s1 = "foo";
40 var s2 = "bar";
41 var s3 = s1 + s2 + s1 + s2;
42 var s4 = new java.lang.StringBuilder("abc");
43 checkProps(s1);
44 checkProps(s2);
45 checkProps(s3);
46 checkProps(s4);
48 // Rebuild string and compare to original
49 function rebuildString(s) {
50 var buf = s.split("");
51 print(buf);
52 while (buf.length > 1) {
53 var result = [];
54 buf.reduce(function(previous, current, index) {
55 if (previous) {
56 result.push(previous + current);
57 return null;
58 } else if (index === buf.length - 1) {
59 result.push(current);
60 return null;
61 } else {
62 return current;
63 }
64 });
65 buf = result;
66 print(buf);
67 }
68 return buf[0];
69 }
71 var n1 = "The quick gray nashorn jumps over the lazy zebra.";
72 var n2 = rebuildString(n1);
73 print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2);
74 checkProps(n2);
76 var n3 = rebuildString(rebuildString(n2));
77 print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3);
78 checkProps(n3);