[jira] Created: (STDCXX-766) std::ios::copyfmt() doesn't copy tie(), getloc()

[Martin Sebor (JIRA)]

std::ios::copyfmt() doesn't copy tie(), getloc()
------------------------------------------------

                 Key: STDCXX-766
                 URL: https://issues.apache.org/jira/browse/STDCXX-766
             Project: C++ Standard Library
          Issue Type: Bug
          Components: 27. Input/Output
    Affects Versions: 4.2.0, 4.1.4, 4.1.3, 4.1.2
         Environment: all
            Reporter: Martin Sebor
             Fix For: 4.2.1


The following test fails with the latest trunk.

{noformat}
$ cat t.cpp && make t && ./t
#include <cstdio>
#include <ios>
#include <iosfwd>
#include <locale>
#include <ostream>

#define ASSERT(expr)                                                    \
    (expr) ? (void)0                                                    \
    : (void)std::fprintf (stderr, "line %d: Assertion failed: %s\n",    \
                          __LINE__, #expr)

int main ()
{
    std::ios x ((std::streambuf*)1);
    x.tie ((std::ostream*)2);

    std::ios y (0);

    const std::ios::iostate     x_rdstate = x.rdstate ();
    const std::streambuf* const x_rdbuf   = x.rdbuf ();

    const std::locale loc =
        std::locale (std::locale::classic (), new std::numpunct<char>());

    y.tie (x.tie () + 1);
    y.exceptions (y.eofbit);
    y.flags (y.boolalpha | y.scientific);
    y.precision (x.precision () + 1);
    y.width (x.width () + 1);
    y.fill (x.fill () + 1);
    y.imbue (loc);

    ASSERT (x.tie ()        != y.tie ());
    ASSERT (x.getloc ()     != y.getloc ());

    x.copyfmt (y);

    ASSERT (x.rdbuf ()      == x_rdbuf);
    ASSERT (x.tie ()        == y.tie ());
    ASSERT (x.rdstate ()    == x_rdstate);
    ASSERT (x.exceptions () == y.exceptions ());
    ASSERT (x.flags ()      == y.flags ());
    ASSERT (x.precision ()  == y.precision ());
    ASSERT (x.width ()      == y.width ());
    ASSERT (x.fill ()       == y.fill ());
    ASSERT (x.getloc ()     == y.getloc ());
}
gcc -c -I/home/sebor/stdcxx/include/ansi -D_RWSTDDEBUG    -I/home/sebor/stdcxx/i
nclude -I/build/sebor/stdcxx-gcc-4.1.2-11S-LVS/include -I/home/sebor/stdcxx/incl
ude/ansi -I/build/sebor/PlumHall/lvs07a/conform -I/build/sebor/PlumHall/lvs07a/d
st.3  -pedantic -nostdinc++ -g   -W -Wall -Wcast-qual -Winline -Wshadow -Wwrite-
strings -Wno-long-long -Wcast-align    t.cpp
gcc t.o -o t  -L/build/sebor/stdcxx-gcc-4.1.2-11S-LVS/lib  -lstd11S -lsupc++ -lm
 
line 39: Assertion failed: x.tie () == y.tie ()
line 46: Assertion failed: x.getloc () == y.getloc ()
{noformat}

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