Réf. : Quantlib-users digest, Vol 1 #215 - 1 msg

[richard.Rouge]

I just got a compile error when trying to compile with mingw2 (gcc 3.2) at the
same point. It used to work before (mingw-gcc 2.95). I found the following
workaround (array.hpp)
change
     std::ptr_fun(QL_FABS));
to
     std::ptr_fun<double,double>(QL_FABS));







[hidden email]@lists.sourceforge.net on 29-09-2002
09:20:33 PM

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Today's Topics:

   1. Re: Compilation Bug in  Quantlib Array (Luigi Ballabio)

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Date: Sun, 29 Sep 2002 13:07:47 +0200
To: "Bill" <[hidden email]>, <[hidden email]>
From: Luigi Ballabio <[hidden email]>
Subject: Re: [Quantlib-users] Compilation Bug in  Quantlib Array
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Hi Bill,

At 11:08 AM -0400 9/28/02, Bill wrote:
>  I am experiencing compilation problems with
>  Microsoft VC6 on quantlib section Array.h.
>  I believe the problem is in the std::ptr_fun  it won't run in
>  release mode  gives strange error messages like not enough
>  arguments.

Hmm. Could you send me the error, to see if I can make head or tail of it?

>Since its function is to make abs derive from
>  std::unary function the trick is to do it the long way.
>  Replace the above code with
>
>
>   template <class T1, class T2>
>   struct qlfabs : public std::unary_function<T1, T2>
>   {  T1 operator() (T2 x ) const
>    {return ::abs(x) ; }
>   };
>
>         inline Array Abs(const Array& v) {
>             Array result(v.size());
>             std::transform(v.begin(),v.end(),result.begin(),
>                 //std::ptr_fun(QL_FABS));
>         qlfabs<double, double>());
>             return result;
>         }
>
>
>   You also have to do this with Sqrt, Log,and Exp.

Well, the purpose of using std::ptr_fun was brevity. If it gives
problems, I guess the next simplest way would be to write

        inline Array Abs(const Array& v) {
           Array result(v.size());
           for (unsigned i=0; i<v.size(); i++)
              result[i] = QL_FABS(v[i]);
           return result;
        }

Thanks for the report,
   Luigi




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[Luigi Ballabio-2]

At 02:47 PM 10/8/02 +0200, [hidden email] wrote:
>I just got a compile error when trying to compile with mingw2 (gcc 3.2) at the
>same point. It used to work before (mingw-gcc 2.95). I found the following
>workaround (array.hpp)
>change
>      std::ptr_fun(QL_FABS));
>to
>      std::ptr_fun<double,double>(QL_FABS));

Bonjour Richard,
         I'll try that. If it works on the other platforms as well (of
which I'm pretty confident) I'll integrate it into the code.

Thanks,
         Luigi