Map as return Type

[Kapil]

Hi,

I am finding a strange problem... I have created a function with return type as map.. On one system it works pretty fine but when i transferred my app to another system for testing it was giving error... I couldnt find the reason for the error...

Here is the code :

map<int, vector<int> > getSB1Info(); // 89 Line - Error
map<int, vector<int> > getSB2Info(); // 90 Line - Error
map<int, vector<int> > getSB3Info(); // 91 Line - Error
 
inline map<int, vector<int> > CSwitchBlockSoln::getSB1Info() // 112 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb1Map;
        vector<SSBConnectivity> eastSideList = m_pSB1Info->getEastSideList();
        int eastSideListSize = eastSideList.size();
 
        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();
 
	sb1Map[fromTrack] = sbConn.getToTrackList();
        }
 
        return sb1Map;
}
 
inline map<int, vector<int> > CSwitchBlockSoln::getSB2Info() //132 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb2Map;
        vector<SSBConnectivity> eastSideList = m_pSB3Info->getEastSideList();
        int eastSideListSize = eastSideList.size();
 
        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();
	sb2Map[fromTrack] = sbConn.getToTrackList();
        }
 
        return sb2Map;
}
 
inline map<int, vector<int> > CSwitchBlockSoln::getSB3Info() //152 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb3Map;
        vector<SSBConnectivity> eastSideList = m_pSB3Info->getEastSideList();
        int eastSideListSize = eastSideList.size();
 
        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();
	sb3Map[fromTrack] = sbConn.getToTrackList();
         }
 
        return sb3Map;
}

map<int, vector<int> > getSB1Info(); // 89 Line - Error
map<int, vector<int> > getSB2Info(); // 90 Line - Error
map<int, vector<int> > getSB3Info(); // 91 Line - Error

inline map<int, vector<int> > CSwitchBlockSoln::getSB1Info() // 112 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb1Map;
        vector<SSBConnectivity> eastSideList = m_pSB1Info->getEastSideList();
        int eastSideListSize = eastSideList.size();

        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();

	sb1Map[fromTrack] = sbConn.getToTrackList();
        }

        return sb1Map;
}

inline map<int, vector<int> > CSwitchBlockSoln::getSB2Info() //132 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb2Map;
        vector<SSBConnectivity> eastSideList = m_pSB3Info->getEastSideList();
        int eastSideListSize = eastSideList.size();

        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();
	sb2Map[fromTrack] = sbConn.getToTrackList();
        }

        return sb2Map;
}

inline map<int, vector<int> > CSwitchBlockSoln::getSB3Info() //152 Line - Error
{
        SSBConnectivity sbConn;
        int fromTrack;
        vector<int> toTrackList;
        map< int, vector<int> > sb3Map;
        vector<SSBConnectivity> eastSideList = m_pSB3Info->getEastSideList();
        int eastSideListSize = eastSideList.size();

        for(int fromTrackIndex = 0; fromTrackIndex < eastSideListSize; fromTrackIndex++)
        {
                sbConn = eastSideList[fromTrackIndex];
                fromTrack = sbConn.getFromTrack();
	sb3Map[fromTrack] = sbConn.getToTrackList();
         }

        return sb3Map;
}

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And here are the errors:

[HTML]
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:89:
error: ISO C++ forbids declaration of `map' with no type
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:89:
error: expected `;' before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:90:
error: ISO C++ forbids declaration of `map' with no type
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:90:
error: expected `;' before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:91:
error: ISO C++ forbids declaration of `map' with no type
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:91:
error: expected `;' before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:112
: error: expected init-declarator before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:112
: error: expected `,' or `;' before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:132
: error: expected init-declarator before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:132
: error: expected `,' or `;' before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:152
: error: expected init-declarator before '<' token
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:152
: error: expected `,' or `;' before '<' token
[/HTML]

Please tell me what can i do to fix up this problem...
Thank you,

with regards,
Kapil

[ball]

What about using pass by reference method instead of direct return it?

[Kapil]

What about using pass by reference method instead of direct return it?

Problem is that it is not able to recognize map as a return type... Passing by reference or by value comes later... On the other hand it recognizes map as a return type on one system and doesnt on the other system...

Kapil

[mcosta]

Hi,

I am finding a strange problem... I have created a function with return type as map.. On one system it works pretty fine but when i transferred my app to another system for testing it was giving error... I couldnt find the reason for the error...

Here is the code :

map<int, vector<int> > getSB1Info(); // 89 Line - Error
map<int, vector<int> > getSB2Info(); // 90 Line - Error
map<int, vector<int> > getSB3Info(); // 91 Line - Error

map<int, vector<int> > getSB1Info(); // 89 Line - Error
map<int, vector<int> > getSB2Info(); // 90 Line - Error
map<int, vector<int> > getSB3Info(); // 91 Line - Error

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And here are the errors:

[HTML]
C:/backup/picoga_gui_view/PICOGA/Router/PiCoGA1.0/INCLUDE/CSwitchBlockSoln.h:89:
error: ISO C++ forbids declaration of `map' with no type
[/HTML]

Please tell me what can i do to fix up this problem...
Thank you,

with regards,
Kapil

Sorry for the stupid quastion?

There is the istruction

using namespace std;

using namespace std;

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in the code?

Another way is to declare

std::map< int, std::vector<int> >

std::map< int, std::vector<int> >

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[Kapil]

using namespace std;

using namespace std;

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yeaps, i have included it at the top after the header files inclusion.

std::map< int, std::vector<int> >

std::map< int, std::vector<int> >

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if there is the inclusion of namespace std then there is no need for me to write it this way.. and if yes then why so???

thanks,

regards,
Kapil

[mcosta]

if there is the inclusion of namespace std then there is no need for me to write it this way.. and if yes then why so???

regards,
Kapil

Can you post the file?

[wysota]

Change every occurence of "map" to std::map and everything will be fine. And of course remember to #include <map>

[Michiel]

If he already has 'using namespace std' there's no need for that. It would help if we could see the whole file.

[michael]

What compiler is giving you the error on what system? Just curious.

Probably will not help, but worth a try IMHO.

Instead of doing

std::map<some_type, std::vector<some_type>> someFunction1();
std::map<some_type, std::vector<some_type>> someFunction2();
std::map<some_type, std::vector<some_type>> someFunction3();

std::map<some_type, std::vector<some_type>> someFunction1();
std::map<some_type, std::vector<some_type>> someFunction2();
std::map<some_type, std::vector<some_type>> someFunction3();

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Try this:

typedef std::map<some_type, std::vector<some_type>> MyMapType;
 
MyMapType someFunction1();
MyMapType someFunction2();
MyMapType someFunction3();

typedef std::map<some_type, std::vector<some_type>> MyMapType;

MyMapType someFunction1();
MyMapType someFunction2();
MyMapType someFunction3();

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Might work, might not..

Michael