/*+
−
 * 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);+
−