| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * NASHORN-759 - Efficient string concatenation with + operator |
| * |
| * @test |
| * @run |
| */ |
| |
| // Check invalidation of callsite for non-string CharSequence |
| function checkProps(s) { |
| print(typeof s); |
| print(typeof s.length); |
| print(s.charCodeAt === String.prototype.charCodeAt); |
| print(); |
| } |
| |
| var s1 = "foo"; |
| var s2 = "bar"; |
| var s3 = s1 + s2 + s1 + s2; |
| var s4 = new java.lang.StringBuilder("abc"); |
| checkProps(s1); |
| checkProps(s2); |
| checkProps(s3); |
| checkProps(s4); |
| |
| // Rebuild string and compare to original |
| function rebuildString(s) { |
| var buf = s.split(""); |
| print(buf); |
| while (buf.length > 1) { |
| var result = []; |
| buf.reduce(function(previous, current, index) { |
| if (previous) { |
| result.push(previous + current); |
| return null; |
| } else if (index === buf.length - 1) { |
| result.push(current); |
| return null; |
| } else { |
| return current; |
| } |
| }); |
| buf = result; |
| print(buf); |
| } |
| return buf[0]; |
| } |
| |
| var n1 = "The quick gray nashorn jumps over the lazy zebra."; |
| var n2 = rebuildString(n1); |
| print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2); |
| checkProps(n2); |
| |
| var n3 = rebuildString(rebuildString(n2)); |
| print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3); |
| checkProps(n3); |