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libstdc++/3981: error in std_complex.h with complex<long double>
- To: gcc-gnats at gcc dot gnu dot org
- Subject: libstdc++/3981: error in std_complex.h with complex<long double>
- From: gunter dot winkler at mathematik dot tu-chemnitz dot de
- Date: 10 Aug 2001 10:03:43 -0000
- Reply-To: gunter dot winkler at mathematik dot tu-chemnitz dot de
>Number: 3981
>Category: libstdc++
>Synopsis: error in std_complex.h with complex<long double>
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Aug 10 03:06:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Gunter Winkler
>Release: gcc 3.0 libstdc++.so.3
>Organization:
>Environment:
Linux nasarow 2.4.7 #1 Mon Jul 30 21:08:47 MEST 2001 i686 unknown
>Description:
(long double) * std::complex<long double> only multiplies
real part. See complexbug.C
double works well, long double does not.
>How-To-Repeat:
compile with: gcc complexbug.C -lstdc++
and run:
long double
x 10 z (1,1) x*z (10,1)
double
x 10 z (1,1) x*z (10,10)
x*z should always be (10,10)
>Fix:
patch $INCLUDE/bits/std_complex.h with:
*** std_complex.h.orig Fri Aug 10 11:26:21 2001
--- std_complex.h Fri Aug 10 11:27:05 2001
***************
*** 930,943 ****
inline complex<long double>&
complex<long double>::operator*=(long double __r)
{
! __real__ _M_value *= __r;
return *this;
}
inline complex<long double>&
complex<long double>::operator/=(long double __r)
{
! __real__ _M_value /= __r;
return *this;
}
--- 930,943 ----
inline complex<long double>&
complex<long double>::operator*=(long double __r)
{
! _M_value *= __r;
return *this;
}
inline complex<long double>&
complex<long double>::operator/=(long double __r)
{
! _M_value /= __r;
return *this;
}
>Release-Note:
>Audit-Trail:
>Unformatted:
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