------- Comment #5 from dodji at gcc dot gnu dot org  2009-03-17 07:59 -------
Subject: Re:  DW_TAG_imported_module should be used (not
 DW_TAG_imported_declaration)

jakub at gcc dot gnu dot org a écrit :

> So this patch instead?  C++ will never need non-NULL DECL_NAME on
> IMPORTED_DECL,
> as it doesn't have the ability to rename imports like Fortran does.

Hmmh, I think the non null name there is useful for namespace aliases in
C++, e.g.

namespace A {
  int foo;
}

void
f ()
{
  namespace B  =  A;
}

That namespace alias will be represented by a
DW_TAG_imported_declaration which DW_AT_name set to "B" and which
DW_AT_import is set to a reference to namespace A.

FWIW, the DWARF3 spec says at 3.2.3:

"A C++ namespace alias may be represented by an imported declaration
entry with a name attribute whose value is a null-terminated string
containing the alias name as it appears in the source program and an
import attribute whose value is a reference to the applicable original
namespace or namespace extension entry."


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39471