macro functions not mapped to D

[timotheecour]

macros don't seemed to be mapped to D, despite what's said in https://wiki.dlang.org/Calypso: Constant and empty preprocessor macros (mapped to enums).

Other tools support macros (eg: swig, dstep etc)

test.h:

#define my_macro 42
#define my_macro2(x) (2*x)

main.d:

modmap (C++) "test.h";
import (C++) _;
void main(){
  enum a1=my_macro;  // Error: undefined identifier 'my_macro'
  enum a2=my_macro2(3);  // Error: undefined identifier 'my_macro2'
}

Use cases:
many (eg: CV_32F in opencv etc)

workaround:
add this in test.h:

enum class macros{
	_CV_8U=CV_8U,
	_CV_32F=CV_32F,
};

and in main.d:

import (C++) macros;
enum CV_8U=macros._CV_8U;

obviously, not ideal.

And for macro function, the workaround is more involved (define a template etc), and generates other issues: #67

EDIT: and this is despite:
Dsymbol* DeclMapper::VisitMacro(const clang::IdentifierInfo* II, const clang::Expr* E)
in ddmd/cpp/cppmodule.cpp