How do I define pragma(mangle,"name") for a type?

Use case:
I'd like to avoid the complications involved in
https://github.com/dlang/druntime/pull/1316/files [Addition of C++
std::string, std::vector to D #1316]
by directly defining the desired mangle for a c++ std::string (+ other
similar use cases):

```

pragma(mangle, "NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE")
struct string_cpp;

extern(C++, ns){
  void fun1(string_cpp*a);
  string_cpp fun2();
  void string_cpp fun3(const ref string_cpp a);
}

```


The problem is that this mangles fun1 as _ZN2ns4fun1EP10string_cpp , ie, using "string_cpp" instead of "NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE" for the `a` argument of fun1, thus ignoring (silently!) the pragma(mangle).

Side note: Microsoft uses a different C++ mangling...

On Tuesday, 14 February 2017 at 11:15:26 UTC, Timothee Cour wrote:
> How do I define pragma(mangle,"name") for a type?
>
> Use case:
> I'd like to avoid the complications involved in
> https://github.com/dlang/druntime/pull/1316/files [Addition of C++
> std::string, std::vector to D #1316]
> by directly defining the desired mangle for a c++ std::string (+ other
> similar use cases):
>
> ```
>
> pragma(mangle, "NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE")
> struct string_cpp;
>
> extern(C++, ns){
>   void fun1(string_cpp*a);
>   string_cpp fun2();
>   void string_cpp fun3(const ref string_cpp a);
> }
>
> ```
>
>
> The problem is that this mangles fun1 as _ZN2ns4fun1EP10string_cpp , ie, using "string_cpp" instead of "NSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE" for the `a` argument of fun1, thus ignoring (silently!) the pragma(mangle).

I've got a use case similar to this: declaring and using named opaque types in LLVM IR to support images for DCompute OpenCL support. If I could leverage pragma mangle instead that would be awesome!