wifstream

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In my Windows 7 this code doesn't work:
std::wstring& getFileName() {
     return file_name;
}
myMethod(){
wchar_t tmp = *getFileName().c_str() ;
     std::wifstream infile( tmp ); // <<-- error: invalid conversion
from 'wchar_t' to 'const char*' [-fpermissive]
     return infile.good( );
}


It seems to me that  std::wifstream does not accept wchar_t as a value
type, but only const char*, contrary to to what is explained in
http://msdn.microsoft.com/en-us/library/3b5w4311.aspx

Where did I go wrong? or, is this a bug?

g++ : Using built-in specs.
At line:1 char:1
+ g++ -v 2> GCC_version.txt
+ ~~~~~~~~~~~~~~~~~~~~~~~~~
     + CategoryInfo          : NotSpecified: (Using built-in
specs.:String) [], RemoteException
     + FullyQualifiedErrorId : NativeCommandError

COLLECT_GCC=[DRIVE:]\mingw64\bin\g++.exe
COLLECT_LTO_WRAPPER=[DRIVE:]/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/4.8.2/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../../../src/gcc-4.8.2/configure
--host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32
--target=x86_64-w64-mingw32 --prefix=/mingw64
--with-sysroot=/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64
--with-gxx-include-dir=/mingw64/x86_64-w64-mingw32/include/c++
--enable-shared --enable-static --enable-targets=all
--enable-multilib --enable-languages=ada,c,c++,fortran,objc,obj-c++,lto
--enable-libstdcxx-time=yes
--enable-threads=posix --enable-libgomp --enable-libatomic --enable-lto
--enable-graphite --enable-checking=release
--enable-fully-dynamic-string --enable-version-specific-runtime-libs
--enable-sjlj-exceptions
--disable-isl-version-check --disable-cloog-version-check
--disable-libstdcxx-pch --disable-libstdcxx-debug
--enable-bootstrap --disable-rpath --disable-win32-registry
--disable-nls --disable-werror --d
isable-symvers --with-gnu-as --with-gnu-ld --with-arch-32=i686
--with-arch-64=nocona --with-tune-32=generic
--with-tune-64=core2 --with-libiconv --with-system-zlib
--with-gmp=/c/mingw482/prerequisites/x86_64-w64-mingw32-static
--with-mpfr=/c/mingw482/prerequisites/x86_64-w64-mingw32-static
--with-mpc=/c/mingw482/prerequisites/x86_64-w64-mingw32-static
--with-isl=/c/mingw482/prerequisites/x86_64-w64-mingw32-static
--with-cloog=/c/mingw482/prerequisites/x86_64-w64-mingw32-static
--enable-cloog-backend=isl
--with-pkgversion='x86_64-posix-sjlj-rev4, Built by MinGW-W64 project'
--with-bugurl=http://sourceforge.net/projects/mingw-w64  CFLAGS='-O2 -pipe
-I/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/include
-I/c/mingw482/prerequisites/x86_64-zlib-static/include
-I/c/mingw482/prerequisites/x86_64-w64-mingw32-static/include'
CXXFLAGS='-O2 -pipe
-I/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/include
-I/c/mingw482/prerequisites/x86_64-zlib-static/include
-I/c/mingw482/prerequisites/x86_64-w64-mingw32-static/include'
CPPFLAGS= LDFLAGS='-pipe
-L/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/lib
-L/c/mingw482/prerequisites/x86_64-zlib-static/lib
-L/c/mingw482/prerequisites/x86_64-w64-mingw32-static/lib '
Thread model: posix
gcc version 4.8.2 (x86_64-posix-sjlj-rev4, Built by MinGW-W64 project)



--------------080705040301000406020404
Content-Type: text/html; charset="utf-8"
Content-Transfer-Encoding: quoted-printable

<html>
  <head>

    <meta http-equiv=3D"content-type" content=3D"text/html=3B charset=3Dutf=
-8">
  </head>
  <body bgcolor=3D"#000000" text=3D"#FF6600">
    In my Windows 7 this code doesn't work:<br>
    std::wstring&amp=3B getFileName() {<br>
    =C2=A0=C2=A0=C2=A0 return file_name=3B<br>
    }<br>
    myMethod(){<br>
    wchar_t tmp =3D *getFileName().c_str() =3B<br>
    =C2=A0=C2=A0=C2=A0 std::wifstream infile( tmp )=3B // &lt=3B&lt=3B-- er=
ror: invalid
    conversion from 'wchar_t' to 'const char*' [-fpermissive]<br>
    =C2=A0=C2=A0=C2=A0 return infile.good( )=3B<br>
    }<br>
    <br>
    <br>
    It seems to me that=C2=A0 std::wifstream does not accept wchar_t as a
    value type=2C but only const char*=2C contrary to to what is explained
    in<br>
    <a class=3D"moz-txt-link-freetext" href=3D"http://msdn.microsoft.com/en=
-us/library/3b5w4311.aspx">http://msdn.microsoft.com/en-us/library/3b5w4311=
.aspx</a><br>
    <br>
    Where did I go wrong? or=2C is this a bug?<br>
    <br>
    g++ : Using built-in specs.<br>
    At line:1 char:1<br>
    + g++ -v 2&gt=3B GCC_version.txt<br>
    + ~~~~~~~~~~~~~~~~~~~~~~~~~<br>
    =C2=A0=C2=A0=C2=A0 + CategoryInfo=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0 : NotSpecified: (Using built-in
    specs.:String) []=2C RemoteException<br>
    =C2=A0=C2=A0=C2=A0 + FullyQualifiedErrorId : NativeCommandError<br>
    =C2=A0<br>
    COLLECT_GCC=3D[DRIVE:]\mingw64\bin\g++.exe<br>
COLLECT_LTO_WRAPPER=3D[DRIVE:]/mingw64/bin/../libexec/gcc/x86_64-w64-mingw3=
2/4.8.2/lto-wrapper.exe<br>
    Target: x86_64-w64-mingw32<br>
    Configured with: ../../../src/gcc-4.8.2/configure
    --host=3Dx86_64-w64-mingw32 --build=3Dx86_64-w64-mingw32 <br>
    --target=3Dx86_64-w64-mingw32 --prefix=3D/mingw64
    --with-sysroot=3D/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64
    <br>
    --with-gxx-include-dir=3D/mingw64/x86_64-w64-mingw32/include/c++
    --enable-shared --enable-static --enable-targets=3Dall <br>
    --enable-multilib
    --enable-languages=3Dada=2Cc=2Cc++=2Cfortran=2Cobjc=2Cobj-c++=2Clto
    --enable-libstdcxx-time=3Dyes <br>
    --enable-threads=3Dposix --enable-libgomp --enable-libatomic
    --enable-lto --enable-graphite --enable-checking=3Drelease <br>
    --enable-fully-dynamic-string --enable-version-specific-runtime-libs
    --enable-sjlj-exceptions <br>
    --disable-isl-version-check --disable-cloog-version-check
    --disable-libstdcxx-pch --disable-libstdcxx-debug <br>
    --enable-bootstrap --disable-rpath --disable-win32-registry
    --disable-nls --disable-werror --d<br>
    isable-symvers --with-gnu-as --with-gnu-ld --with-arch-32=3Di686
    --with-arch-64=3Dnocona --with-tune-32=3Dgeneric <br>
    --with-tune-64=3Dcore2 --with-libiconv --with-system-zlib
    --with-gmp=3D/c/mingw482/prerequisites/x86_64-w64-mingw32-static <br>
    --with-mpfr=3D/c/mingw482/prerequisites/x86_64-w64-mingw32-static <br>
    --with-mpc=3D/c/mingw482/prerequisites/x86_64-w64-mingw32-static <br>
    --with-isl=3D/c/mingw482/prerequisites/x86_64-w64-mingw32-static <br>
    --with-cloog=3D/c/mingw482/prerequisites/x86_64-w64-mingw32-static
    --enable-cloog-backend=3Disl <br>
    --with-pkgversion=3D'x86_64-posix-sjlj-rev4=2C Built by MinGW-W64
    project' <br>
    --with-bugurl=3D<a class=3D"moz-txt-link-freetext" href=3D"http://sourc=
eforge.net/projects/mingw-w64">http://sourceforge.net/projects/mingw-w64</a=CFLAGS=3D'-O

    -pipe <br>
    -I/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/include <br>
    -I/c/mingw482/prerequisites/x86_64-zlib-static/include
    -I/c/mingw482/prerequisites/x86_64-w64-mingw32-static/include' <br>
    CXXFLAGS=3D'-O2 -pipe
    -I/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/include <br>
    -I/c/mingw482/prerequisites/x86_64-zlib-static/include
    -I/c/mingw482/prerequisites/x86_64-w64-mingw32-static/include' <br>
    CPPFLAGS=3D LDFLAGS=3D'-pipe
    -L/c/mingw482/x86_64-482-posix-sjlj-rt_v3-rev4/mingw64/opt/lib <br>
    -L/c/mingw482/prerequisites/x86_64-zlib-static/lib
    -L/c/mingw482/prerequisites/x86_64-w64-mingw32-static/lib '<br>
    Thread model: posix<br>
    gcc version 4.8.2 (x86_64-posix-sjlj-rev4=2C Built by MinGW-W64
    project)
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