Create a vector of typedef struct, how to?

[vRltwE]

Hi,

I want to create a std::vector of typedef struct. Any std::vector position will store a "vetor" that is a typedef struc...

Actually I did this:

#include <vector>
#include <fstream>
#include <stdlib.h>
#include <iostream>
#include <string>
#include <sstream>
#include <math.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <iomanip>
#include <dirent.h>
#include <errno.h>

using namespace std;

/*
 *
 */
int main(int argc, char** argv) {

    typedef struct mywp{
        int line, col, index;
    } waypoint;

    typedef struct v1{
        waypoint wp;
    } vetor;

    std::vector< vetor > waypoints;

    return (EXIT_SUCCESS);
}

I am getting the error:

/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/cristiano/NetBeansProjects/waypoints'
/usr/bin/make  -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/waypoints
make[2]: Entering directory `/home/cristiano/NetBeansProjects/waypoints'
mkdir -p build/Debug/GNU-Linux-x86
rm -f build/Debug/GNU-Linux-x86/main.o.d
g++    -c -g -MMD -MP -MF build/Debug/GNU-Linux-x86/main.o.d -o build/Debug/GNU-Linux-x86/main.o main.cpp
main.cpp: In function 'int main(int, char**)':
main.cpp:39: error: template argument for 'template<class _Alloc> class std::allocator' uses local type 'main(int, char**)::v1'
main.cpp:39: error:   trying to instantiate 'template<class _Alloc> class std::allocator'
main.cpp:39: error: template argument 2 is invalid
main.cpp:39: error: invalid type in declaration before ';' token
make[2]: *** [build/Debug/GNU-Linux-x86/main.o] Error 1
make[2]: Leaving directory `/home/cristiano/NetBeansProjects/waypoints'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/cristiano/NetBeansProjects/waypoints'
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 581ms)

Any idea of what I am doing wrong?

[helios]

The error message is pretty clear. You're trying to make an instance of std::vector<T>, which you can't.

Oh, and typedef structs are a C thing. C++ has a more convenient syntax:

struct waypoint{ int line,col,index; };
struct vetor{ waypoint wp; };

[vRltwE]

But I need a std::vector which type is the new type I am creating..

There is no way I can do such thing?

I changed my code to:

int main(int argc, char** argv) {

    struct waypoint {
        int line, col, index;
    };

    struct vetor {
        waypoint wp;
    };

    std::vector< vetor > waypoints;

    return (EXIT_SUCCESS);
}

And I am getting the error:

/usr/bin/make -f nbproject/Makefile-Debug.mk SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/cristiano/NetBeansProjects/waypoints'
/usr/bin/make  -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/waypoints
make[2]: Entering directory `/home/cristiano/NetBeansProjects/waypoints'
mkdir -p build/Debug/GNU-Linux-x86
rm -f build/Debug/GNU-Linux-x86/main.o.d
g++    -c -g -MMD -MP -MF build/Debug/GNU-Linux-x86/main.o.d -o build/Debug/GNU-Linux-x86/main.o main.cpp
main.cpp: In function 'int main(int, char**)':
main.cpp:39: error: template argument for 'template<class _Alloc> class std::allocator' uses local type 'main(int, char**)::vetor'
main.cpp:39: error:   trying to instantiate 'template<class _Alloc> class std::allocator'
main.cpp:39: error: template argument 2 is invalid
main.cpp:39: error: invalid type in declaration before ';' token
make[2]: *** [build/Debug/GNU-Linux-x86/main.o] Error 1
make[2]: Leaving directory `/home/cristiano/NetBeansProjects/waypoints'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/cristiano/NetBeansProjects/waypoints'
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 809ms)

[Duthomhas]

You can't use local types in a standard container.

Also, your vetor type doesn't have much point. Why use it?

struct waypoint {
    int line, col, index;
};

int main(int argc, char** argv) {

    std::vector<waypoint> waypoints;

    ...

    return 0;
}

Personally, I like the EXIT_SUCCESS and EXIT_FAILURE macros, but they are only #defined in <cstdlib>, which I don't think you ought to have in your list of #includes... (Or if you do actually require it, use <cstdlib> instead of <stdlib.h>.)

Hope this helps.

[vRltwE]

Thanks guys,

problem solved!