Hello, as in the title. How can I call D functions from C++ (If my main() is in a c++ file).

Thanks alot!

On Wednesday, 18 March 2015 at 14:17:13 UTC, Namal wrote:
> Hello, as in the title. How can I call D functions from C++ (If my main() is in a c++ file).
>
> Thanks alot!

D:

extern(C++) void SomeDFunction()
{
  doSomething();
}

C++:

void SomeDFunction();

void main()
{
  SomeDFunction();
}

Please also see:
http://dlang.org/cpp_interface.html

Kind Regards
Benjamin

On Wednesday, 18 March 2015 at 14:17:13 UTC, Namal wrote:
> Hello, as in the title. How can I call D functions from C++ (If my main() is in a c++ file).
>
> Thanks alot!

http://dlang.org/cpp_interface.html
http://dlang.org/interfaceToC.html

There is also D.learn ;)

On Wednesday, 18 March 2015 at 14:20:19 UTC, Benjamin Thaut wrote:
> On Wednesday, 18 March 2015 at 14:17:13 UTC, Namal wrote:
>> Hello, as in the title. How can I call D functions from C++ (If my main() is in a c++ file).
>>
>> Thanks alot!
>
> D:
>
> extern(C++) void SomeDFunction()
> {
>   doSomething();
> }
>
> C++:
>
> void SomeDFunction();
>
> void main()
> {
>   SomeDFunction();
> }
>
> Please also see:
> http://dlang.org/cpp_interface.html
>
> Kind Regards
> Benjamin

I'm pretty sure the OP wanted to call D functions from C++, not C++ functions from D.

On Wednesday, 18 March 2015 at 14:20:19 UTC, Benjamin Thaut wrote:
> On Wednesday, 18 March 2015 at 14:17:13 UTC, Namal wrote:
>> Hello, as in the title. How can I call D functions from C++ (If my main() is in a c++ file).
>>
>> Thanks alot!
>
> D:
>
> extern(C++) void SomeDFunction()
> {
>   doSomething();
> }
>
> C++:
>
> void SomeDFunction();
>
> void main()
> {
>   SomeDFunction();
> }
>
> Please also see:
> http://dlang.org/cpp_interface.html
>
> Kind Regards
> Benjamin


he probably will need cal rt_init and rt_term too.
similar post with example for C:

http://forum.dlang.org/post/ljgtqa$1qb1$1@digitalmars.com

alright, thanks alot. Now I have.

test.d

import std.stdio;

extern (C++) int foo(int i, int j, int k)
{
    writefln("i = %s", i);
    writefln("j = %s", j);
    writefln("k = %s", k);
    return 1;
}

and main.cpp

int foo(int i, int j, int k);

int main()
{
  foo(1,2,3);
}

Can you help me show how to compile and link it together please, thank you.

On Wednesday, 18 March 2015 at 14:50:21 UTC, Namal wrote:
> Can you help me show how to compile and link it together please, thank you.

Try C example first: http://forum.dlang.org/post/qppmeeakboxjzuuwreyy@forum.dlang.org

On Wednesday, 18 March 2015 at 14:40:48 UTC, krzaq wrote:
>
> I'm pretty sure the OP wanted to call D functions from C++, not C++ functions from D.

If you look very closely you will notice that my example does exactly what the OP wanted.

On Wednesday, 18 March 2015 at 14:50:21 UTC, Namal wrote:
>
> Can you help me show how to compile and link it together please, thank you.

What platform are you on, windows, linux, osx? What c++ compiler do you use? msvc, clang, gcc?

On Wednesday, 18 March 2015 at 15:51:28 UTC, Benjamin Thaut wrote:
> On Wednesday, 18 March 2015 at 14:40:48 UTC, krzaq wrote:
>>
>> I'm pretty sure the OP wanted to call D functions from C++, not C++ functions from D.
>
> If you look very closely you will notice that my example does exactly what the OP wanted.

Oh, right. I'm sorry, I assumed void main() means D, since it's not legit C++.