Re: libstdc++/2634

[bkoz at gcc dot gnu dot org]

The following reply was made to PR libstdc++/2634; it has been noted by GNATS.

From: bkoz@gcc.gnu.org
To: andras.aszodi@pharma.novartis.com, bkoz@gcc.gnu.org,
  dirk.steenpass@pharma.novartis.com, gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: libstdc++/2634
Date: 2 May 2001 19:25:18 -0000

 Synopsis: istrstream state not correct upon failed conversion
 
 State-Changed-From-To: feedback->closed
 State-Changed-By: bkoz
 State-Changed-When: Wed May  2 12:25:18 2001
 State-Changed-Why:
     
     This code works as expected under current CVS, giving me:
     %a.out 
     i3333333.32 -> X
     n3333333.32 -> X
     
     I've ported your code to the new c++ library, the code I used is as below:
     
     
     // libstdc++/2634
     // Try to convert strings starting with 'i' or 'n' to double, you won't get
     // the 'X' you should get.
     
     #include <iostream>
     #include <sstream>
     
     int main(void)
     {
       using namespace std;
     
       istringstream istrs01("i3333333.32");
       istringstream istrs02("n3333333.32");
       
       // DBL_MAX is printed if conversion fails but stream state remains good.
       double Tdouble = DBL_MAX; 
     
       if ( istrs01 >> Tdouble) 
         cout << istrs01.str() <<" -> " << Tdouble << endl;
       else
         cout << istrs01.str() <<" -> X"<<endl;
     
       if ( istrs02 >> Tdouble) 
         cout << istrs02.str() <<" -> " << Tdouble << endl;
       else
         cout << istrs02.str() <<" -> X"<<endl;
     
       return 0;
     }
 
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