jdk8-mips64-public/nashorn: test/script/basic/typecoerce.js@e9169a96a3d1

     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  * There was a bug in the old Lower that didn't fully propagate type information

    26  * by way of assignment. 'q' in the example below would have finished a double

    27  * even though it can get an object value through the assignment 'q = l'

    28  *

    29  * Furthermore, this caused type coercion to be done at q = l, and not a q = q * 2,

    30  * which is a bug. This test ensures it happens in the correct order

    31  *

    32  * @test

    33  * @run

    34  */

    36 function createObject() {

    37     var obj = { valueOf: function() { print("toNumber coercion"); return 17; }}

    38     return obj;

    39 }

    41 function f() {

    42     var l = 1.2; //number

    43     var q = 2.3; //number

    44     for (var i = 0; i < 2; i++) {

    45     q = l; // q = toNumber(l), no coercion here

    46     print("assignment done");

    47     q = q * 2; // q = q * 2, coercion here

    48     print("multiplication done");

    49     l = createObject();

    50     }

    51 }

    53 f();

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