Tue, 13 Oct 2015 18:43:30 +0300
Merge
jlaskey@3 | 1 | /* |
jlaskey@7 | 2 | * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
jlaskey@3 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
attila@962 | 4 | * |
jlaskey@3 | 5 | * This code is free software; you can redistribute it and/or modify it |
jlaskey@3 | 6 | * under the terms of the GNU General Public License version 2 only, as |
jlaskey@3 | 7 | * published by the Free Software Foundation. |
attila@962 | 8 | * |
jlaskey@3 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jlaskey@3 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jlaskey@3 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jlaskey@3 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
jlaskey@3 | 13 | * accompanied this code). |
attila@962 | 14 | * |
jlaskey@3 | 15 | * You should have received a copy of the GNU General Public License version |
jlaskey@3 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
jlaskey@3 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
attila@962 | 18 | * |
jlaskey@3 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
jlaskey@3 | 20 | * or visit www.oracle.com if you need additional information or have any |
jlaskey@3 | 21 | * questions. |
jlaskey@3 | 22 | */ |
jlaskey@3 | 23 | |
jlaskey@3 | 24 | /* |
jlaskey@3 | 25 | * NASHORN-759 - Efficient string concatenation with + operator |
jlaskey@3 | 26 | * |
jlaskey@3 | 27 | * @test |
jlaskey@3 | 28 | * @run |
jlaskey@3 | 29 | */ |
jlaskey@3 | 30 | |
jlaskey@3 | 31 | // Check invalidation of callsite for non-string CharSequence |
jlaskey@3 | 32 | function checkProps(s) { |
jlaskey@3 | 33 | print(typeof s); |
jlaskey@3 | 34 | print(typeof s.length); |
jlaskey@3 | 35 | print(s.charCodeAt === String.prototype.charCodeAt); |
jlaskey@3 | 36 | print(); |
jlaskey@3 | 37 | } |
jlaskey@3 | 38 | |
jlaskey@3 | 39 | var s1 = "foo"; |
jlaskey@3 | 40 | var s2 = "bar"; |
jlaskey@3 | 41 | var s3 = s1 + s2 + s1 + s2; |
jlaskey@3 | 42 | var s4 = new java.lang.StringBuilder("abc"); |
jlaskey@3 | 43 | checkProps(s1); |
jlaskey@3 | 44 | checkProps(s2); |
jlaskey@3 | 45 | checkProps(s3); |
jlaskey@3 | 46 | checkProps(s4); |
jlaskey@3 | 47 | |
jlaskey@3 | 48 | // Rebuild string and compare to original |
jlaskey@3 | 49 | function rebuildString(s) { |
jlaskey@3 | 50 | var buf = s.split(""); |
jlaskey@3 | 51 | print(buf); |
jlaskey@3 | 52 | while (buf.length > 1) { |
jlaskey@3 | 53 | var result = []; |
jlaskey@3 | 54 | buf.reduce(function(previous, current, index) { |
jlaskey@3 | 55 | if (previous) { |
jlaskey@3 | 56 | result.push(previous + current); |
jlaskey@3 | 57 | return null; |
jlaskey@3 | 58 | } else if (index === buf.length - 1) { |
jlaskey@3 | 59 | result.push(current); |
jlaskey@3 | 60 | return null; |
jlaskey@3 | 61 | } else { |
jlaskey@3 | 62 | return current; |
jlaskey@3 | 63 | } |
jlaskey@3 | 64 | }); |
jlaskey@3 | 65 | buf = result; |
jlaskey@3 | 66 | print(buf); |
jlaskey@3 | 67 | } |
jlaskey@3 | 68 | return buf[0]; |
jlaskey@3 | 69 | } |
jlaskey@3 | 70 | |
jlaskey@3 | 71 | var n1 = "The quick gray nashorn jumps over the lazy zebra."; |
jlaskey@3 | 72 | var n2 = rebuildString(n1); |
jlaskey@3 | 73 | print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2); |
jlaskey@3 | 74 | checkProps(n2); |
jlaskey@3 | 75 | |
jlaskey@3 | 76 | var n3 = rebuildString(rebuildString(n2)); |
jlaskey@3 | 77 | print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3); |
jlaskey@3 | 78 | checkProps(n3); |