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/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is JavaScript Engine testing utilities.
*
* The Initial Developer of the Original Code is Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): pschwartau@netscape.com
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
*
* Date: 10 Jan 2002
* SUMMARY: Reassignment to a const is NOT an error per ECMA
* See http://bugzilla.mozilla.org/show_bug.cgi?id=103602
*
* ------- Additional Comment #4 From Brendan Eich 2002-01-10 15:30 -------
*
* That's per ECMA (don't blame me, I fought for what Netscape always did:
* throw an error [could be a catchable exception since 1.3]).
* Readonly properties, when set by assignment, are not changed, but no error
* or exception is thrown. The value of the assignment expression is the value
* of the r.h.s.
*
* If you want a *strict* warning, pls change the summary of this bug to say so.
*/
//-----------------------------------------------------------------------------
var UBound = 0;
var bug = 103602;
var summary = 'Reassignment to a const is NOT an error per ECMA';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
var cnFAIL_1 = 'Redeclaration of a const FAILED to cause an error';
var cnFAIL_2 = 'Reassigning to a const caused an ERROR! It should not!!!';
var sEval = '';
/*
* Not every implementation supports const (a non-ECMA extension)
* For example, Rhino does not; it would generate a complile-time error.
* So we have to hide this so it will be detected at run-time instead.
*/
try
{
sEval = 'const one = 1';
eval(sEval);
}
catch(e)
{
quit(); // if const is not supported, this testcase is over -
}
status = inSection(1);
try
{
/*
* Redeclaration of const should be a compile-time error.
* Hide so it will be detected at run-time.
*/
sEval = 'const one = 2;';
eval(sEval);
expect = ''; // we shouldn't reach this line
actual = cnFAIL_1;
addThis();
}
catch(e)
{
// good - we should be here.
actual = expect;
addThis();
}
status = inSection(2);
try
{
/*
* Reassignment to a const should be NOT be an error, per ECMA.
*/
one = 2;
actual = expect; // good: no error was generated
addThis();
// although no error, the assignment should have been ignored -
status = inSection(3);
actual = one;
expect = 1;
addThis();
// the value of the EXPRESSION, however, is the value of the r.h.s. -
status = inSection(4);
actual = (one = 2);
expect = 2;
addThis();
}
catch(e)
{
// BAD - we shouldn't be here
expect = '';
actual = cnFAIL_2;
addThis();
}
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
enterFunc ('test');
printBugNumber (bug);
printStatus (summary);
for (var i = 0; i < UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
exitFunc ('test');
}
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