Thread: typedef long int comparison

Hello,

I have a library which typedefs a long int

Code:

//from tpd1.h

typedef long int Int

and there is another library which also typedefs a long int

Code:

//from tpd2.h

typdef long int integer

There is a function from the second library which should receive a integer*, but i have to give it a Int*. It won't accept (invalid conversion).

To add it in my .cpp, I use

Code:

#include "tpd1.h"
extern "C" {
#include "tpd2.h"
}

because tpd2.h have some things from Fortran.
These won't work:

Code:

Int i;
integer j;

Int *pi = &j; //wont work
integer *pj = &i; //wont work

but the following will

Code:

Int *pi = (Int *) (&j); //will work
integer *pj = (integer *) (&i); //will work

Anyone can't tell me why they implicitly convert, and how to make them do it.

Thank you,
Nepper271

Never mind this post. It is working now.

Sorry for the inconvenience

I'm wondering whether the extern C is doing something interesting? If I use the following file:

Code:

typedef long int Int;

typedef long int Integer;

int main(void) {
    Int a = 5;
    long int *b;
    b = &a;
    Integer *c;
    c = &a;
}

I can't get g++ to complain.