Re: D & C++ class question
On Thursday, 29 November 2018 at 17:12:28 UTC, kinke wrote: On Thursday, 29 November 2018 at 16:24:58 UTC, bauss wrote: Are there no support for references with mangling in D? Like what about int&? Of course, that's `ref int`. But a `ref CppClass` is C++-mangled as `CppClass* &`. I was hoping for that and glad to know that was the only issue.
Re: D & C++ class question
On Thursday, 29 November 2018 at 16:24:58 UTC, bauss wrote: Are there no support for references with mangling in D? Like what about int&? Of course, that's `ref int`. But a `ref CppClass` is C++-mangled as `CppClass* &`.
Re: D & C++ class question
On Wednesday, 28 November 2018 at 13:42:43 UTC, Nicholas Wilson wrote: On Wednesday, 28 November 2018 at 13:13:40 UTC, bauss wrote: Well unfortunately I cannot control the C++ side of things, but I assume that it'll work properly with extern(C++) so I guess I will just go ahead and try and see if everything works out. I have access to the C++ source so at the very least I can see how it's used there and if it's possible in the way I want it to. I don't hope I have to have a separate C++ "bridge" to make it work. Its mostly a magling problem, if the C++ API uses class& that you have to interface with then you have a problem that would require a shim. Are there no support for references with mangling in D? Like what about int&?
Re: D & C++ class question
On Wednesday, 28 November 2018 at 13:42:43 UTC, Nicholas Wilson wrote: On Wednesday, 28 November 2018 at 13:13:40 UTC, bauss wrote: Well unfortunately I cannot control the C++ side of things, but I assume that it'll work properly with extern(C++) so I guess I will just go ahead and try and see if everything works out. I have access to the C++ source so at the very least I can see how it's used there and if it's possible in the way I want it to. I don't hope I have to have a separate C++ "bridge" to make it work. Its mostly a magling problem, if the C++ API uses class& that you have to interface with then you have a problem that would require a shim. It looks like every class is passed by pointers, so that's a relief on that part I guess.
Re: D & C++ class question
On Wednesday, 28 November 2018 at 13:13:40 UTC, bauss wrote: Well unfortunately I cannot control the C++ side of things, but I assume that it'll work properly with extern(C++) so I guess I will just go ahead and try and see if everything works out. I have access to the C++ source so at the very least I can see how it's used there and if it's possible in the way I want it to. I don't hope I have to have a separate C++ "bridge" to make it work. Its mostly a magling problem, if the C++ API uses class& that you have to interface with then you have a problem that would require a shim.
Re: D & C++ class question
On Wednesday, 28 November 2018 at 10:44:05 UTC, Nicholas Wilson
wrote:
On Wednesday, 28 November 2018 at 07:22:46 UTC, bauss wrote:
If I have a class from D.
How would you use that class in C++?
Like what's the correct approach to this.
Would it work just by doing "extern(C++)" or will that only
work for D to use C++ classes?
If you have
foo.d
class Foo
{
int aMember;
void aMethod() { ... };
final aFinalMethod() { ... };
}
to expose that to C++ you need to add extern(C++) too Foo and
use it in C++ as a Foo*
foo.h
class Foo
{
int aMember;
virtual void aMethod();
void aFinalMethod();
};
If you can't/don't want to do that you can always pass it
around in C++ as an opaque pointer with functions that call the
member functions and get/set the variables (i.e. the pimpl
strategy).
Well unfortunately I cannot control the C++ side of things, but I
assume that it'll work properly with extern(C++) so I guess I
will just go ahead and try and see if everything works out. I
have access to the C++ source so at the very least I can see how
it's used there and if it's possible in the way I want it to. I
don't hope I have to have a separate C++ "bridge" to make it work.
Re: D & C++ class question
On Wednesday, 28 November 2018 at 07:22:46 UTC, bauss wrote:
If I have a class from D.
How would you use that class in C++?
Like what's the correct approach to this.
Would it work just by doing "extern(C++)" or will that only
work for D to use C++ classes?
If you have
foo.d
class Foo
{
int aMember;
void aMethod() { ... };
final aFinalMethod() { ... };
}
to expose that to C++ you need to add extern(C++) too Foo and use
it in C++ as a Foo*
foo.h
class Foo
{
int aMember;
virtual void aMethod();
void aFinalMethod();
};
If you can't/don't want to do that you can always pass it around
in C++ as an opaque pointer with functions that call the member
functions and get/set the variables (i.e. the pimpl strategy).
D & C++ class question
If I have a class from D. How would you use that class in C++? Like what's the correct approach to this. Would it work just by doing "extern(C++)" or will that only work for D to use C++ classes?
