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c++.stlsoft - Converting from winstl::a2w to 'const unsigned short *' on MSVC++8

reply Adi Shavit <adish gentech.co.il> writes:
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<font face="Verdana">Hi,<br>
<br>
&nbsp; I'm getting this compilation error on MSVC++ 2005:<br>
<br>
</font>
<blockquote><tt>h:\adish\dev\audiostream\audiostream\audiostream\audiostream.hpp(56)
: error C2664: 'std::streamsize
audiostream::audio_sink&lt;SinkType&gt;::write(const unsigned short
*,std::streamsize)' : <font color="#cc0000"><b>cannot convert
parameter 1 from 'stlsoft::winstl_project::multibyte2wide&lt;CCH&gt;'
to 'const unsigned short *'</b></font><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; with<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
SinkType=boost::iostreams::sink<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ]<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; and<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; [<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CCH=256<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ]<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No user-defined-conversion operator
available that can perform
this conversion, or the operator cannot be called</tt><br>
</blockquote>
<font face="Verdana"><br>
See context <a
 href="http://www.codeproject.com/audio/audio_ostream.asp?msg=1965489#xx1965489xx">here</a>.<br>
Essentially I try to pass a </font><b><tt>winstl::a2w()</tt></b><font
 face="Verdana"> to a method expecting </font><tt><b>const unsigned
short* s</b></tt><font face="Verdana">.<br>
It works fine on MSVC++6.<br>
<br>
Any thoughts?<br>
Thanks,<br>
Adi<br>
</font>
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Mar 29 2007
parent reply "Matthew Wilson" <matthew hat.stlsoft.dot.org> writes:
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The problem is not with multibyte2wide.

It's that your write() method takes 'unsigned char const*', whereas =
winstl::multibyte2wide's char type is 'wchar_t'. On VC6 these are the =
same (because wchar_t is a typedef); on VC8 these are different because =
wchar_t is a full-fledged type.

:-)
  "Adi Shavit" <adish gentech.co.il> wrote in message =
news:euh6qd$4mi$1 digitalmars.com...
  Hi,

    I'm getting this compilation error on MSVC++ 2005:


    h:\adish\dev\audiostream\audiostream\audiostream\audiostream.hpp(56) =
: error C2664: 'std::streamsize =
audiostream::audio_sink<SinkType>::write(const unsigned short =
*,std::streamsize)' : cannot convert parameter 1 from =
'stlsoft::winstl_project::multibyte2wide<CCH>' to 'const unsigned short =
*'
            with
            [
                SinkType=3Dboost::iostreams::sink
            ]
            and
            [
                CCH=3D256
            ]
            No user-defined-conversion operator available that can =
perform this conversion, or the operator cannot be called


  See context here.
  Essentially I try to pass a winstl::a2w() to a method expecting const =
unsigned short* s.
  It works fine on MSVC++6.

  Any thoughts?
  Thanks,
  Adi
Mar 29 2007
next sibling parent reply "Matthew Wilson" <matthew hat.stlsoft.dot.org> writes:
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The question is, I think, why the wide string write() is not 'wchar_t =
const*'?

If it has to be for some reason, then you're going to need to do some =
casting. Included is a modified form of your audiostream.hpp that fixes =
it (and compiles with VC8).

If it doesn't, then it's a real simple fix.
  "Matthew Wilson" <matthew hat.stlsoft.dot.org> wrote in message =
news:euha08$84t$1 digitalmars.com...
  The problem is not with multibyte2wide.

  It's that your write() method takes 'unsigned char const*', whereas =
winstl::multibyte2wide's char type is 'wchar_t'. On VC6 these are the =
same (because wchar_t is a typedef); on VC8 these are different because =
wchar_t is a full-fledged type.

  :-)
    "Adi Shavit" <adish gentech.co.il> wrote in message =
news:euh6qd$4mi$1 digitalmars.com...
    Hi,

      I'm getting this compilation error on MSVC++ 2005:


      =
h:\adish\dev\audiostream\audiostream\audiostream\audiostream.hpp(56) : =
error C2664: 'std::streamsize =
audiostream::audio_sink<SinkType>::write(const unsigned short =
*,std::streamsize)' : cannot convert parameter 1 from =
'stlsoft::winstl_project::multibyte2wide<CCH>' to 'const unsigned short =
*'
              with
              [
                  SinkType=3Dboost::iostreams::sink
              ]
              and
              [
                  CCH=3D256
              ]
              No user-defined-conversion operator available that can =
perform this conversion, or the operator cannot be called


    See context here.
    Essentially I try to pass a winstl::a2w() to a method expecting =
const unsigned short* s.
    It works fine on MSVC++6.

    Any thoughts?
    Thanks,
    Adi

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<DIV><FONT face=3DArial size=3D2>The question is, I think, why the wide =
string=20
write() is not 'wchar_t const*'?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>If it has to be for some reason, then =
you're going=20
to need to do some casting. Included is a modified form of your =
audiostream.hpp=20
that fixes it (and&nbsp;compiles with VC8).</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>If it doesn't, then it's a real simple=20
fix.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV>"Matthew Wilson" &lt;<A=20
  =
href=3D"mailto:matthew hat.stlsoft.dot.org">matthew hat.stlsoft.dot.org</=
A>&gt;=20
  wrote in message <A=20
  =
href=3D"news:euha08$84t$1 digitalmars.com">news:euha08$84t$1 digitalmars.=
com</A>...</DIV>
  <DIV><FONT face=3DArial size=3D2>The problem is not with=20
  multibyte2wide.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>It's that your write() method takes =
'unsigned=20
  char const*', whereas winstl::multibyte2wide's char type is 'wchar_t'. =
On VC6=20
  these are the same (because wchar_t is a typedef); on VC8 these are =
different=20
  because wchar_t is a full-fledged type.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2><SPAN id=3DintelliTXT=20
  name=3D"intelliTxt">:-)</DIV></SPAN></FONT>
  <BLOCKQUOTE=20
  style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
    <DIV>"Adi Shavit" &lt;<A=20
    href=3D"mailto:adish gentech.co.il">adish gentech.co.il</A>&gt; =
wrote in=20
    message <A=20
    =
href=3D"news:euh6qd$4mi$1 digitalmars.com">news:euh6qd$4mi$1 digitalmars.=
com</A>...</DIV><FONT=20
    face=3DVerdana>Hi,<BR><BR>&nbsp; I'm getting this compilation error =
on MSVC++=20
    2005:<BR><BR></FONT>
    =
<BLOCKQUOTE><TT>h:\adish\dev\audiostream\audiostream\audiostream\audiostr=
eam.hpp(56)=20
      : error C2664: 'std::streamsize=20
      audiostream::audio_sink&lt;SinkType&gt;::write(const unsigned =
short=20
      *,std::streamsize)' : <FONT color=3D#cc0000><B>cannot convert =
parameter 1=20
      from 'stlsoft::winstl_project::multibyte2wide&lt;CCH&gt;' to =
'const=20
      unsigned short =
*'</B></FONT><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      with<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      =
[<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      =
SinkType=3Dboost::iostreams::sink<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=
&nbsp;=20
      ]<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      and<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      =
[<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      CCH=3D256<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
      ]<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No =
user-defined-conversion=20
      operator available that can perform this conversion, or the =
operator=20
      cannot be called</TT><BR></BLOCKQUOTE><FONT face=3DVerdana><BR>See =
context <A=20
    =
href=3D"http://www.codeproject.com/audio/audio_ostream.asp?msg=3D1965489#=
xx1965489xx">here</A>.<BR>Essentially=20
    I try to pass a </FONT><B><TT>winstl::a2w()</TT></B><FONT =
face=3DVerdana> to a=20
    method expecting </FONT><TT><B>const unsigned short* s</B></TT><FONT =

    face=3DVerdana>.<BR>It works fine on MSVC++6.<BR><BR>Any=20
    =
thoughts?<BR>Thanks,<BR>Adi<BR></BLOCKQUOTE></BLOCKQUOTE></FONT></BODY></=
HTML>

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Mar 29 2007
parent reply Adi Shavit <adish gentech.co.il> writes:
Hi,
 The question is, I think, why the wide string write() is not 'wchar_t 
 const*'?

In fact, once I changed it to wchar_t it works on both VS6 and VS2005.
 If it has to be for some reason, then you're going to need to do some 
 casting. Included is a modified form of your audiostream.hpp that 
 fixes it (and compiles with VC8).
  
 If it doesn't, then it's a real simple fix.

Adi
Mar 30 2007
parent "Matthew Wilson" <matthew hat.stlsoft.dot.org> writes:
Cool. I suspected it might. :-)

"Adi Shavit" <adish gentech.co.il> wrote in message
news:eujqtc$4kn$1 digitalmars.com...
 Hi,
 The question is, I think, why the wide string write() is not 'wchar_t
 const*'?

In fact, once I changed it to wchar_t it works on both VS6 and VS2005.
 If it has to be for some reason, then you're going to need to do some
 casting. Included is a modified form of your audiostream.hpp that
 fixes it (and compiles with VC8).

 If it doesn't, then it's a real simple fix.

Adi

Mar 30 2007
prev sibling parent Adi Shavit <adish gentech.co.il> writes:
 The problem is not with multibyte2wide.

 It's that your write() method takes 'unsigned char const*', whereas 
 winstl::multibyte2wide's char type is 'wchar_t'. On VC6 these are the 
 same (because wchar_t is a typedef); on VC8 these are different 
 because wchar_t is a full-fledged type.

was my oversight integrating with Boost Iostreams. Thanks, Adi
Mar 30 2007