[ quantlib-Bugs-3588371 ] (with fix) error C2679: no operator .. with stlp_std::string

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Bugs item #3588371, was opened at 2012-11-18 13:40
Message generated for change (Comment added) made by lballabio
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=112740&aid=3588371&group_id=12740

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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Marcello Pietrobon (marcello-ptr)
Assigned to: Nobody/Anonymous (nobody)
Summary: (with fix) error C2679: no operator .. with stlp_std::string

Initial Comment:
vs2010 with STLPort.5.2.1 and Boost.1_52
XP SP3

error:
error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'stlpd_std::string'


this happens with the files
ql\currency.cpp (26)
ql\errors.cpp : lines 53,56,58
ql\patterns\observable.hpp : line 140

The reason is that stlport doesn't give an implicit conversion from string to c_str() when needed (but I don't know what is the current standard on this specific point).

The fixes is just to provide the c_str() member.
We cannot use a str() member because it's not given with STLPort.


So here the fixes for the different files:
ql\currency.cpp : line 26
            return out << c.code().c_str();

ql\errors.cpp : lines 53,56,58
        std::ostringstream msg;
        #ifdef QL_ERROR_FUNCTIONS
        if (function != "(unknown)")
            msg << function.c_str() << ": ";
        #endif
        #ifdef QL_ERROR_LINES
        msg << "\n  " << file.c_str() << "(" << line << "): \n";
        #endif
        msg << message.c_str();
        return msg.str();


ql\patterns\observable.hpp : line 140
        QL_ENSURE(successful,
                  "could not notify one or more observers: " << errMsg.c_str() );




Here is the full report for one file:
1>D:\Projs\Libraries\Public\QuantLib\QuantLib-Active\ql/patterns/observable.hpp(140): error C2679: binary '<<' : no operator found which takes a right-hand operand of type 'stlpd_std::string' (or there is no acceptable conversion)
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(297): could be 'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<char,stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,char)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(304): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,char)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(311): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,signed char)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(318): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,unsigned char)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(325): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<char,stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,const char *)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(332): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,const char *)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(339): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,const signed char *)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(346): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::operator <<<stlpd_std::char_traits<char>>(stlpd_std::basic_ostream<_CharT,_Traits> &,const unsigned char *)' [found using argument-dependent lookup]
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(78): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(stlpd_std::basic_ostream<_CharT,_Traits> &(__cdecl *)(stlpd_std::basic_ostream<_CharT,_Traits> &))'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(79): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(stlpd_std::basic_ostream<_CharT,_Traits>::__ios_base_fn)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(80): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(stlpd_std::basic_ios<_CharT,_Traits> &(__cdecl *)(stlpd_std::basic_ios<_CharT,_Traits> &))'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(101): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(stlpd_std::basic_streambuf<_CharT,_Traits> *)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(104): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(unsigned char)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(106): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(short)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(107): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(unsigned short)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(108): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(int)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(115): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(size_t)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(117): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(long)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(118): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(unsigned long)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(120): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(__int64)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(121): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(unsigned __int64)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(123): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(float)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(124): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(double)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(126): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(long double)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(128): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(const void *)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          d:\Projs\Libraries\BSD\STLPort\STLport-Active\stlport\stl/_ostream.h(130): or       'stlpd_std::basic_ostream<_CharT,_Traits> &stlpd_std::basic_ostream<_CharT,_Traits>::operator <<(bool)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]
1>          while trying to match the argument list '(stlpd_std::basic_ostream<_CharT,_Traits>, stlpd_std::string)'
1>          with
1>          [
1>              _CharT=char,
1>              _Traits=stlpd_std::char_traits<char>
1>          ]



----------------------------------------------------------------------

>Comment By: Luigi Ballabio (lballabio)
Date: 2012-11-19 02:12

Message:
Thanks for the report, but I'm a bit confused.  A statement like "out <<
c.code()" isn't expected to trigger a conversion to C string; it just
invokes operator << for std::string, which is defined by the standard.  Do
you have any idea why STLPort doesn't define it?

----------------------------------------------------------------------

Comment By: Marcello Pietrobon (marcello-ptr)
Date: 2012-11-18 13:44

Message:
I must add that probably this error comes with STLPort only
The fix should be valid also without STLPort
so I wouldn't surround the fixes with the condition:
#ifdef _STLPORT_VERSION
#endif

By doing this the fixes would be like, of course:

ql\currency.cpp : line 26
#ifdef _STLPORT_VERSION
return out << c.code().c_str();
#else
return out << c.code();
#endif



----------------------------------------------------------------------

You can respond by visiting:
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[marcelloptr]

You're right

#include <string>

was forgotten

I looked around
http://stackoverflow.com/questions/8679473/error-c2679-binary-no-operator-found-which-takes-a-right-hand-operand-of

The std::string operators are defined in the <string> header.
The header <string.h> is for C-style string functions.

On QuantLib 1.3 only three files need this fix:
ql\patterns\observable.hpp
ql\currency.cpp
ql\errors.cpp
and they all include ql\errors.hpp

so my proposed fix is to add

#include <string> 

in ql\errors.hpp
and it works.

Cheers,
Marcello