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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
*
* Date: 25 November 2002
* SUMMARY: Testing scope
* See http://bugzilla.mozilla.org/show_bug.cgi?id=181834
*
* This bug only bit in Rhino interpreted mode, when the
* 'compile functions with dynamic scope' feature was set.
*
*/
//-----------------------------------------------------------------------------
var UBound = 0;
var BUGNUMBER = 181834;
var summary = 'Testing scope';
var status = '';
var statusitems = [];
var actual = '';
var actualvalues = [];
var expect= '';
var expectedvalues = [];
/*
* If N<=0, |outer_d| just gets incremented once,
* so the return value should be 1 in this case.
*
* If N>0, we end up calling inner() N+1 times:
* inner(N), inner(N-1), ... , inner(0).
*
* Each call to inner() increments |outer_d| by 1.
* The last call, inner(0), returns the final value
* of |outer_d|, which should be N+1.
*/
function outer(N)
{
var outer_d = 0;
return inner(N);
function inner(level)
{
outer_d++;
if (level > 0)
return inner(level - 1);
else
return outer_d;
}
}
/*
* This only has meaning in Rhino -
*/
setDynamicScope(true);
/*
* Recompile the function |outer| via eval() in order to
* feel the effect of the dynamic scope mode we have set.
*/
var s = outer.toString();
eval(s);
status = inSection(1);
actual = outer(-5);
expect = 1;
addThis();
status = inSection(2);
actual = outer(0);
expect = 1;
addThis();
status = inSection(3);
actual = outer(5);
expect = 6;
addThis();
/*
* Sanity check: do same steps with the dynamic flag off
*/
setDynamicScope(false);
/*
* Recompile the function |outer| via eval() in order to
* feel the effect of the dynamic scope mode we have set.
*/
eval(s);
status = inSection(4);
actual = outer(-5);
expect = 1;
addThis();
status = inSection(5);
actual = outer(0);
expect = 1;
addThis();
status = inSection(6);
actual = outer(5);
expect = 6;
addThis();
//-----------------------------------------------------------------------------
test();
//-----------------------------------------------------------------------------
function setDynamicScope(flag)
{
if (this.Packages)
{
var cx = this.Packages.org.mozilla.javascript.Context.getCurrentContext();
cx.setCompileFunctionsWithDynamicScope(flag);
}
}
function addThis()
{
statusitems[UBound] = status;
actualvalues[UBound] = actual;
expectedvalues[UBound] = expect;
UBound++;
}
function test()
{
printBugNumber(BUGNUMBER);
printStatus(summary);
for (var i=0; i<UBound; i++)
{
reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
}
}
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