> -----Original Message----- > From: Mateusz Loskot [mailto:[email protected]] > Sent: 28 September 2012 11:07 > To: General-purpose list for SOCI users. > Subject: Re: [SOCI-users] SOCI // MySQL // failed test case 4 > > > But that's not what we're talking about here. What Sergei reported is that > > MSVC sees a very long number (longer than a double can store) in > > std::istringstream's underlying buffer, tries to read a double from this > > stream, and instead of putting the stream in failed state puts inf in the > > double. I.e., something like > > > > double x; > > std::istringstream > > iss("99999999999999999999999912222222222222222222222222223" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333" > > "9999999999999999999999991222222222222222222222222222333333333333"); > > iss >> x; > > > > With gcc iss.fail() is true after this operation, with MSVC apparently it > > contains infinity. > > Aleksander, > > I missed the point, indeed. > > That is interesting issue, and I also recall it's MSVC-specific. > I always assumed it is related to C99 behaviour of strtod-like parsing. > > Curiosity. I may try to ask MS folks about that.
This is an unresolved issue in the C++ standard! See http://cplusplus.github.com/LWG/lwg-unresolved.html#1169 1169. num_get not fully compatible with strto* Regards, Roger. ------------------------------------------------------------------------------ Got visibility? Most devs has no idea what their production app looks like. Find out how fast your code is with AppDynamics Lite. http://ad.doubleclick.net/clk;262219671;13503038;y? http://info.appdynamics.com/FreeJavaPerformanceDownload.html _______________________________________________ Soci-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/soci-users
