[CppAD] operator>>( istream , AD<double> )

[Norman Goldstein]

Great!  I checked the diffs, and this is exactly what I had in mind.
Thank you very much.  Will install cppad-20121230 when it is available.

Cheers,
Norm



On 12/30/2012 07:07 PM, Brad Bell wrote:
> I checked in some changes to support the operation
>     cin >> x
> where cin is an istream and x is an AD<Base> (provided that Base 
> supports the operation). See
>     https://projects.coin-or.org/CppAD/changeset/2692
>
> I am currently modifying the method whereby the documentation and 
> tarballs are built early each morning. If it works, tomorrow morning, 
> the corresponding version of CppAD will be
>     cppad-20121230
>
> Until it does work,you can use subversion to download the most recent 
> version of the trunk which supports this operation; see
>     http://www.coin-or.org/CppAD/Doc/download.htm#Subversion
>
> Brad.
>
> On 12/30/2012 03:11 PM, Norman Goldstein wrote:
>> I would find it convenient to write code like:
>>
>> #include <iostream>
>> CppAD::AD<double> x;
>> std::cin >> x;
>>
>> but I get the error
>>
>> //============ Error from compilier ====================
>> tcppad.cpp:70:14: error: cannot bind ‘std::istream {aka 
>> std::basic_istream<char>}’ lvalue to ‘std::basic_istream<char>&&’
>> In file included from 
>> /usr/lib/gcc/i686-redhat-linux/4.7.2/../../../../include/c++/4.7.2/iostream:41:0,
>> from /home/work/SRC/source/SVN_src/dev/src/test/tcppad.cpp:1:
>> /usr/lib/gcc/i686-redhat-linux/4.7.2/../../../../include/c++/4.7.2/istream:866:5: 
>> error: initializing argument 1 of ‘std::basic_istream<_CharT, 
>> _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&&, 
>> _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = 
>> CppAD::AD<double>]’
>> //==============================================
>>
>> Is there a header I should be using? Or is this code not a good idea?
>>
>> I am using
>> g++ -std=c++0x ...
>>
>> on Fedora 17, 32-bit, x86
>>
>> Thank you.
>>
>> _______________________________________________
>> CppAD mailing list
>> CppAD at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/cppad
>>
>
> _______________________________________________
> CppAD mailing list
> CppAD at list.coin-or.org
> http://list.coin-or.org/mailman/listinfo/cppad
>