[cfe-dev] Cleaning up the representation of Decls in the AST

[Ted Kremenek]

On Aug 23, 2008, at 5:57 PM, Neil Booth wrote:

> Sorry I should have been clearer.  I'm not referring to visibility,
> I'm referring to the fact that in C "struct y" is at file scope,
> whereas in C++ it's a nested struct.
>
>>> How would one walk file-scope struct/
>>> union/enum declarations for C?
>>
>> We can currently iterate over all file-scope declarations using
>> TranslationUnit (which contains references to all top-level
>> declarations).  This same interface could be preserved by (a)  
>> providing a
>> new iterator mechanism to iterate over top-level DeclGroups and (b)
>> layering a revised iterator mechanism for iterating over the top- 
>> level
>> Decls over the iterating mechanism for top-level DeclGroups.
>
> Hence my follow-up question - it seems your iterator would miss
> "struct y" in a C source file?

Hi Neil,

I'm still a little unclear about your point, but I believe you are  
referring to the name lookup/Sema rules.  The way I would look at it  
is that our AST representation is somewhat orthogonal to handling the  
name lookup rules in Sema.

Ted