Error using STL function copy

[arkady....@gmail.com]

Hello,

During compilation of code :
std::copy(AgentID_To_AgentStruct.begin(),AgentID_To_AgentStruct.end
(),Local_AgentID_To_AgentStruct.begin());

I got error

Error 125 error C2582: 'operator =' function is unavailable in
'std::pair<_Ty1,_Ty2>' D:\Program Files\Microsoft Visual Studio 8\VC
\include\xutility 2266

I am using VC7++.

Thanks

Arkady

[g3r...@gmail.com]

sounds like something can't be copied, overload operator= for the
elements of Local_AgentID_To_AgentStruct

[Fraser Ross]

Are you using an associative container?

Fraser.

[Vaclav Haisman]

This is not enough information to diagnose what is the problem. At least
provide the types of AgentID_To_AgentStruct and Local_AgentID_To_AgentStruct.

>
> I am using VC7++.
I do not think you are using VC7 or VC7.1. The path in the pasted error says
you are using VC8.

--
VH

[SG]

On 28 Dez., 16:18, arkady.karp...@gmail.com wrote:
> During compilation of code :
> std::copy(AgentID_To_AgentStruct.begin(),AgentID_To_AgentStruct.end
> (),Local_AgentID_To_AgentStruct.begin());
>
> I got error
>
> Error   125     error C2582: 'operator =' function is unavailable in
> 'std::pair<_Ty1,_Ty2>'    D:\Program Files\Microsoft Visual Studio 8\VC
> \include\xutility       2266

You really have to provide some more infos. I'm guessing that
AgentID_To_AgentStruct and Local_AgentID_To_AgentStruct are maps of
some sort. This would explain that "std::pair<_Ty1,_Ty2>". However,
the elements of a map are NOT assignable. The key is const which is
why your compiler complained.

If you want to copy the map simply write

map2 = map1;

If you want to add the pairs from one map to the other you can do this
via

#include <iterator>

copy(map1.begin(), map1.end(),
std::inserter(map2,map2.begin()) );

Cheers!
SG

[SG]

On 29 Dez., 21:37, SG <s.gesem...@gmail.com> wrote:
> If you want to add the pairs from one map to the other you can do this
> via
>
>    #include <iterator>
>
>    copy(map1.begin(), map1.end(),
>         std::inserter(map2,map2.begin()) );

or better yet:

map2.insert(map1.begin(), map1.end());

;-)

Cheers!
SG