Problem in transform function

[ashtwin]

Hi, Thanks for replying. I am using VS98(VC6.0) :) . The headers file and defination of PC is as follows

#include <algorithm>

#include <functional>

#include <iomanip>

#include <iostream>

#include <map>

#include <string>

#include <utility>

#include <vector>

using namespace std;

class PC

{

public:

        enum PC\_type { Dell, HP, IBM, Compaq };

        

        PC( PC\_type appliance = Dell, int model = 220,

                    int serial = 0 );

        

        bool operator<( const PC& rhs ) const;

        

        PC\_type appliance() const;

        int model() const;

        string name() const;

        

        void print() const;

        

        int serial() const;

private:

        PC\_type appliance\_;

        int model\_;

        int serial\_;

};

[Stuart Dootson]

ashtwin wrote:

Thanks for replying. I am using VS98(VC6.0)

My commiserations - VC6 sucks for template usage. Anyway - try declaring the make_pair instance you need before main():

template std::pairPC::PC\_type,PC std::make_pairPC::PC\_type,PC(PC::PC_type,PC);

int main( )
{
// Rest of your code

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[ashtwin]

Hi, i tried the declaration before main

template std::pair<PC::PC_type,PC> std::make_pair<PC::PC_type,PC>(PC::PC_type,PC);
int main( ){

but still getting the same error. May be some problem in project settings.

[Stuart Dootson]

No, shouldn't be project settings. And I don't have VC6 to test with. Oh well.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[ashtwin]

Sorry, the declaration before main is

template std::pairPC::PC\_type,PC std::make_pairPC::PC\_type,PC(PC::PC_type,PC);

[ashtwin]

The program is getting build properly if i use a function insted of make_pair in the last parameter of the function transform and return a pair from that function.

pair<PC::PC_type, PC> MyFunction(PC::PC_type pcType, PC pc)
{
return make_pair(pcType, pc);
}
transform( kind, kind+num_appliances, v.begin(),inserter( stock, stock.end() ),MyFunction);

[Stuart Dootson]

Yes...I should have mentioned that solution :-O In this one, you're not asking the compiler to automatically instantiate a function from the reference in transform, so yes, it includes all the necessary code.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[ashtwin]

Does it mean that whatever i was doing earlier was not correct.

[Stuart Dootson]

Ummm - it should have been correct and OK - but VC6 is a bit rubbish, which is why it didn't work.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

[ashtwin]

Ok, so the problem is with vc6. Thanks for the help.