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* [Bug libstdc++/37957] New: Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one
@ 2008-10-30 14:23 tsyvarev at ispras dot ru
2008-10-30 14:25 ` [Bug libstdc++/37957] " tsyvarev at ispras dot ru
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: tsyvarev at ispras dot ru @ 2008-10-30 14:23 UTC (permalink / raw)
To: gcc-bugs
There are some examples in the description of member function of the num_get<>
facet
iter_type do_get(iter_type in, iter_type end, ios_base& str, ios_base::iostate&
err, bool& val) const
for the case when (str.flags() & ios_base::boolalpha) != 0, that clarify the
algorithm that the function implements (22.2.2.1.2, p16):
For targets true: "a" and false: "abb", the input sequence "a" yields val ==
true and err == str.eofbit; the input sequence "abc" yields err = str.failbit,
with in ending at the 'c'.
In the last example, however, the attached test program shows the following:
andrew@Ubuntu:/mnt/hgfs/shared/temp/test$ g++ test.cpp && ./a.out
failbit wasn't set, and result is true
Rest of stream is 'bc'.
It seems (from this and other tests), that the implementation stops reading
from 'in' when it founds a sequence that matches one of the target sequences.
But it should test, whether the sequence is a (proper) prefix of another target
sequence. And if it is, the function should continue reading.
This behaviour doesn't follow obviously from the description of the function,
but it follows from the examples.
The detailed bug description can be found at:
http://linuxtesting.org/results/report?num=S0736
--
Summary: Wrong behaviour of num_get<>::do_get(bool) in the case
when one target sequence is a prefix of the other one
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tsyvarev at ispras dot ru
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37957
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libstdc++/37957] Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one
2008-10-30 14:23 [Bug libstdc++/37957] New: Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one tsyvarev at ispras dot ru
@ 2008-10-30 14:25 ` tsyvarev at ispras dot ru
2008-11-11 10:24 ` tsyvarev at ispras dot ru
2008-11-11 12:10 ` paolo dot carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: tsyvarev at ispras dot ru @ 2008-10-30 14:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from tsyvarev at ispras dot ru 2008-10-30 14:22 -------
Created an attachment (id=16589)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16589&action=view)
reproduce bug
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37957
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libstdc++/37957] Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one
2008-10-30 14:23 [Bug libstdc++/37957] New: Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one tsyvarev at ispras dot ru
2008-10-30 14:25 ` [Bug libstdc++/37957] " tsyvarev at ispras dot ru
@ 2008-11-11 10:24 ` tsyvarev at ispras dot ru
2008-11-11 12:10 ` paolo dot carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: tsyvarev at ispras dot ru @ 2008-11-11 10:24 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from tsyvarev at ispras dot ru 2008-11-11 10:22 -------
This bug was fixed with fixing of bug 37958.
Testcase for bug 37958 also covers this one.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37957
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug libstdc++/37957] Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one
2008-10-30 14:23 [Bug libstdc++/37957] New: Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one tsyvarev at ispras dot ru
2008-10-30 14:25 ` [Bug libstdc++/37957] " tsyvarev at ispras dot ru
2008-11-11 10:24 ` tsyvarev at ispras dot ru
@ 2008-11-11 12:10 ` paolo dot carlini at oracle dot com
2 siblings, 0 replies; 4+ messages in thread
From: paolo dot carlini at oracle dot com @ 2008-11-11 12:10 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from paolo dot carlini at oracle dot com 2008-11-11 12:08 -------
.
--
paolo dot carlini at oracle dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37957
^ permalink raw reply [flat|nested] 4+ messages in thread
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2008-10-30 14:23 [Bug libstdc++/37957] New: Wrong behaviour of num_get<>::do_get(bool) in the case when one target sequence is a prefix of the other one tsyvarev at ispras dot ru
2008-10-30 14:25 ` [Bug libstdc++/37957] " tsyvarev at ispras dot ru
2008-11-11 10:24 ` tsyvarev at ispras dot ru
2008-11-11 12:10 ` paolo dot carlini at oracle dot com
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