[cfe-dev] Patch for C++ namespaces

[Doug Gregor]

On Sun, Apr 20, 2008 at 9:30 PM, Chris Lattner <clattner at apple.com> wrote:
>  On Apr 20, 2008, at 4:52 PM, Argiris Kirtzidis wrote:
>  > A unified way to walk all 'merged' declaration would be great. How
>  > about I commit namespaces as it is (minus NamespaceScope), so that a
>  > way to deal generally with merged decls would
>  > consider NamespaceDecls too.
>  >
>
>  Makes sense to me!  Note that Doug's recent patch proposes a way to
>  handle merging, but it is (currently) specific to functiondecls.

I looked at Argiris's namespace patch, and we took exactly the same
approach to handling redeclarations: keep the original declaration,
and attach the new declaration onto a chain of previous declarations
rather than pushing it into scope.

Once the DenseMap<Decl*, Decl*> for previous declarations is
available, both functions and namespaces can easily use it (and other
entities that can be redeclared, of course).

  - Doug