On Tuesday, 8 August 2017 at 21:04:23 UTC, Jacob Carlborg wrote:
On 2017-08-08 20:51, Johan Engelen wrote:
Hi all,
Currently, it is not possible to call the C++ function "void
foo(Klass&)" when Klass is an extern(C++) _class_ on the D
side. You
have to declare Klass as a D _struct_, otherwise there is no
way to get
the correct mangling. When Klass has virtual functions, you're
hosed.
For more context (involving "const"), see:
https://forum.dlang.org/post/tvohflgtaxlynpzed...@forum.dlang.org
Is this problem on anybody's radar?
What are the ideas to resolve this issue, or are we content
never to
solve it?
One way to do it, that might be a bit confusing, is to force
the declaration of the function to explicitly specify a pointer
or a reference. Currently it looks like it's an implicit
pointer.
extern (C++) class Klass {}
void foo(Klass*); // ok
void foo(ref Klass); // ok
void foo(Klass); // error
Of course, there's always pragma(mangle) as well.
sorry for hijacking the thread but i have a similar question:
i was wondering if i could write a wrapper for a C++11 library
called cpr. in one of its header files
(https://github.com/whoshuu/cpr/blob/master/include/cpr/auth.h#L13) it has a generic constructor that initializes its member fields. i had no idea as to how to do it. then i came up with the following line:
extern (C++, cpr) {
this(UT, PT)(ref UT username, ref PT password) { ... }
}
when i compiled it with the .a lib given, it worked. do you guys
think i did it right? the &
my second question is: i have no idea what's going on in this
file:
https://github.com/whoshuu/cpr/blob/master/include/cpr/body.h i'd
appreciate some pointers.
