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reply "Carlos Santander B." <carlos8294 msn.com> writes:
g++ seems to do a different name mangling than dmc, so this only works on
windows.

[file: test1.cpp]
#include <stdio.h>
void foo() { printf("Hi from C++\n"); }

[file: test2.d]
extern (C++) void foo();
void main() { foo(); }


 dmc -c test1.cpp
 dmd test2.d test1.obj



I guess it's good to have a shared backend.

-----------------------
Carlos Santander Bernal
May 02 2004
parent reply Robert Jones <robertjones21 HotPOP.com> writes:
Carlos Santander B. wrote:

 g++ seems to do a different name mangling than dmc, so this only works on
 windows.
 
 [file: test1.cpp]
 #include <stdio.h>
 void foo() { printf("Hi from C++\n"); }
 
 [file: test2.d]
 extern (C++) void foo();
 void main() { foo(); }
 
 

dmc -c test1.cpp
dmd test2.d test1.obj



 
 I guess it's good to have a shared backend.
 
 -----------------------
 Carlos Santander Bernal
 
 
 



Walter is aware of this. I rewrote test1.cpp to use iostream and it 
still worked. I will continue to play around with this undocumented feature.

Since gdc uses the same backend as g++, perhaps it can be done on Unix 
as well.

If that works and once I've discovered how much of C++ I can link my D 
projects with, I go back to that FOX toolkit port I shelved. Being able 
to link against C++ object should make it easier, rather than rewriting 
the whole dang thing in D(the reason it's been shelved).

--
Robert Jones
robertjones21 HotPOP.com
Jul 13 2004
parent reply "David Barrett" <dbarrett quinthar.com> writes:
"Robert Jones" <robertjones21 HotPOP.com> wrote in message
news:cd0vg3$ik4$1 digitaldaemon.com...

 So there is some link compatibility with C++ on windows. Wonder if
 Walter is aware of this. I rewrote test1.cpp to use iostream and it
 still worked. I will continue to play around with this undocumented




This is just C++ functions, not C++ objects/methods, right?

-david
Jul 13 2004
parent reply Robert Jones <robertjones21 HotPOP.com> writes:
David Barrett wrote:

 "Robert Jones" <robertjones21 HotPOP.com> wrote in message
 news:cd0vg3$ik4$1 digitaldaemon.com...
 

So there is some link compatibility with C++ on windows. Wonder if
Walter is aware of this. I rewrote test1.cpp to use iostream and it
still worked. I will continue to play around with this undocumented



 feature.
 
 This is just C++ functions, not C++ objects/methods, right?
 
 -david
Jul 13 2004
parent reply Thomas Kuehne <eisvogel users.sourceforge.net> writes:
 
 This is just C++ functions, not C++ objects/methods, right?
 






As far as I can say C++ struct and functions work, but as soon as there is
any class around - even if it's not accessed - thing screw up. 

system: linux / gcc 3.4.

Thoas
Jul 13 2004
parent reply Robert Jones <robertjones21 HotPOP.com> writes:
Thomas Kuehne wrote:


This is just C++ functions, not C++ objects/methods, right?






 
 As far as I can say C++ struct and functions work, but as soon as there is
 any class around - even if it's not accessed - thing screw up. 
 
 system: linux / gcc 3.4.



Did you use gdc/gcc to run your test?


 Thoas
Jul 13 2004
parent Thomas Kuehne <eisvogel users.sourceforge.net> writes:
Robert Jones wrote:


This is just C++ functions, not C++ objects/methods, right?






 As far as I can say C++ struct and functions work, but as soon as there
 is any class around - even if it's not accessed - thing screw up.
 
 system: linux / gcc 3.4.



 Did you use gdc/gcc to run your test?



No, dmd 0.95

a primitive example is: (note that only "add" has C linkage but "multi" C++)

----a.cpp----
typedef struct MyStruct{
        int     i;
        char    c;
};

void multi(MyStruct* arg){
        arg->i = arg->i * 3;
}

extern "C" {
        void add(MyStruct* arg);
}

void add(MyStruct* arg){
        arg->c = arg->c+1;
        multi(arg);
}


----b.d----
extern(C){
        struct MyStruct{
                int i;
                char c;
        }
        void add(MyStruct* );
}

int main(){
        MyStruct m; m.i=1; m.c='A';

        printf("%i %c\n", m.i, m.c);
        add(&m);   
        printf("%i %c\n", m.i, m.c);

        return 0;
}
Jul 13 2004