jlaskey@3: /*
jlaskey@7:  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
jlaskey@3:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jlaskey@3:  * 
jlaskey@3:  * This code is free software; you can redistribute it and/or modify it
jlaskey@3:  * under the terms of the GNU General Public License version 2 only, as
jlaskey@3:  * published by the Free Software Foundation.
jlaskey@3:  * 
jlaskey@3:  * This code is distributed in the hope that it will be useful, but WITHOUT
jlaskey@3:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jlaskey@3:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jlaskey@3:  * version 2 for more details (a copy is included in the LICENSE file that
jlaskey@3:  * accompanied this code).
jlaskey@3:  * 
jlaskey@3:  * You should have received a copy of the GNU General Public License version
jlaskey@3:  * 2 along with this work; if not, write to the Free Software Foundation,
jlaskey@3:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jlaskey@3:  * 
jlaskey@3:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
jlaskey@3:  * or visit www.oracle.com if you need additional information or have any
jlaskey@3:  * questions.
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: /*
jlaskey@3:  * NASHORN-759 - Efficient string concatenation with + operator
jlaskey@3:  *
jlaskey@3:  * @test
jlaskey@3:  * @run
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: // Check invalidation of callsite for non-string CharSequence
jlaskey@3: function checkProps(s) {
jlaskey@3:     print(typeof s);
jlaskey@3:     print(typeof s.length);
jlaskey@3:     print(s.charCodeAt === String.prototype.charCodeAt);
jlaskey@3:     print();
jlaskey@3: }
jlaskey@3: 
jlaskey@3: var s1 = "foo";
jlaskey@3: var s2 = "bar";
jlaskey@3: var s3 = s1 + s2 + s1 + s2;
jlaskey@3: var s4 = new java.lang.StringBuilder("abc");
jlaskey@3: checkProps(s1);
jlaskey@3: checkProps(s2);
jlaskey@3: checkProps(s3);
jlaskey@3: checkProps(s4);
jlaskey@3: 
jlaskey@3: // Rebuild string and compare to original
jlaskey@3: function rebuildString(s) {
jlaskey@3:     var buf = s.split("");
jlaskey@3:     print(buf);
jlaskey@3:     while (buf.length > 1) {
jlaskey@3:         var result = [];
jlaskey@3:         buf.reduce(function(previous, current, index) {
jlaskey@3:             if (previous) {
jlaskey@3:                 result.push(previous + current);
jlaskey@3:                 return null;
jlaskey@3:             } else if (index === buf.length - 1) {
jlaskey@3:                 result.push(current);
jlaskey@3:                 return null;
jlaskey@3:             } else {
jlaskey@3:                 return current;
jlaskey@3:             }
jlaskey@3:         });
jlaskey@3:         buf = result;
jlaskey@3:         print(buf);
jlaskey@3:     }
jlaskey@3:     return buf[0];
jlaskey@3: }
jlaskey@3: 
jlaskey@3: var n1 = "The quick gray nashorn jumps over the lazy zebra.";
jlaskey@3: var n2 = rebuildString(n1);
jlaskey@3: print(n1, n2, n2.length, n1 == n2, n1 === n2, n1 < n2, n1 <= n2, n1 > n2, n1 >= n2);
jlaskey@3: checkProps(n2);
jlaskey@3: 
jlaskey@3: var n3 = rebuildString(rebuildString(n2));
jlaskey@3: print(n3, n3.length, n1 == n3, n2 == n3, n1 === n3, n2 === n3);
jlaskey@3: checkProps(n3);