Re: g++ 3.2.2 error - "no matching function for call to A::setResponse(std::wstring)"

7 Jun 2006 06:59:13 -0700
Thanks a lot. I got the point.

mlimber wrote: wrote:


I am porting a piece of code from VC++ to linux platform. My compiler
is g++ 3.2.2. I am getting following error:

       no matching function for call to A::setResponse(std::wstring)
       candidates are A::setResponse(std::wstring &) ---> This is
indeed the signature

I am using this function as:

      std::wstring A::getXMLStr()
         std::wstring str = /* get a string from XML attribute */
         return str;

      A::setResponse(std::wstring &str)
         this->response = str;


Can anybody please tell me whether this problem is becasue copy
constructor of std::wstring is explicit? Is this problem been fixed in
recent gcc? In that case in which version of gcc this problem is fixed?

This is a problem in your code, which Microsoft allowed for but
shouldn't have. You are trying to bind a temporary (the returned
wstring from A::getXMLStr()) to a non-const reference, which is
illegal. You should alter the signature for A::setResponse() to one of

  A::setResponse(std::wstring str) // if str changes
  A::setResponse(const std::wstring& str) // if str doesn't change

Also, you probably don't need all the references to "this." It is
implied and unnecessary (except in some relatively rare circumstances
with templates).

Cheers! --M

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