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https://issues.apache.org/jira/browse/STDCXX-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12569004#action_12569004
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Farid Zaripov commented on STDCXX-2:
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__rw_fix_flt() is the better place of course and I thought of using it, to fix
this issue.
But this workaround is intended for zero float value only, but the value
doesn't passed to the __rw_fix_flt().
If we could extend the parameters list of the __rw_fix_flt() to append the bool
value indicating that val is zero (see the attached num_put.diff2 patch).
> [MSVC] std::num_put bad formatting of 0.0 with precision and showpoint
> ----------------------------------------------------------------------
>
> Key: STDCXX-2
> URL: https://issues.apache.org/jira/browse/STDCXX-2
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2.0
> Environment: Windows/MSVC
> Reporter: Martin Sebor
> Assignee: Farid Zaripov
> Fix For: 4.2.1
>
> Attachments: 22.locale.num.put.stdcxx-2.cpp, num_put.cpp.diff,
> num_put.cpp.diff2
>
> Original Estimate: 4h
> Time Spent: 2.5h
> Remaining Estimate: 1.5h
>
> When compiled with MSVC (any version), the program below aborts at runtime.
> $ cat t.cpp && cl -D_RWCONFIG=11s_msvc_7_1
> -Ic:/contrib/cygwin/build/sebor/dev-hal/include -I./../../../../include
> -Ic:/contrib/cygwin/build/sebor/dev-hal/examples/stdlib/manual/../include
> -Ic:/contrib/cygwin/build/sebor/dev-hal/include/ansi -I./../../../..
> -Ic:/contrib/cygwin/build/sebor/dev-hal
> -Ic:/contrib/cygwin/build/sebor/dev-hal/examples/stdlib/manual -I. -nologo
> -GX -MLd -W3 -Zi -GA -GR -GF -GZ -c t.cpp && link -nologo
> /NODEFAULTLIB:libcpd /debug /LIBPATH:./../../../../lib /OUT:t.exe t.obj
> std11s_msvc_7_1.lib user32.lib t.cpp && ./t.exe
> #include <cassert>
> #include <sstream>
> int main ()
> {
> std::ostringstream strm;
> strm.setf (strm.showpoint);
> strm.precision (2);
> strm << 0.0;
> assert ("0.0" == strm.str ());
> }
> Assertion failed: "0.0" == strm.str (), file t.cpp, line 13
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