[cfe-dev] Fetching typedef details via libclang

[Abramo Bagnara]

Il 12/04/2011 02:15, Douglas Gregor ha scritto:
> 
> On Mar 28, 2011, at 1:55 PM, Stefan Seefeld wrote:
> 
>> I'm looking for a way to query the libclang AST whether a typedef's 
>> referree type was constructed in-place, such as in
>>
>>   typedef struct { ... } CXString;
>>
>>
>> Such constructs are rather common in C APIs, and I'd like to fold the 
>> two types (the anonymous struct with the 'CXString' alias) into one, to 
>> reduce the noise in the generated API documentation.
>>
>> Is this possible, using libclang ?
> 
> Not currently.
> 
>> If not, any ideas how best to 
>> implement that ?
> 
> 
> It's a little tricky, because Clang's AST doesn't really hold on to this information well. In this specific case, where the tag is anonymous, you can query TagDecl::getTypedefForAnonDecl() to see if it's a typedef of an anonymous declaration. But in a similar case like
> 
>   typedef struct CXString { ... } CXString;
> 
> the AST doesn't have the information you seek. Perhaps this information could be added into ElaboratedType or ElaboratedTypeLoc.

You always forget isEmbeddedInDeclarator ;-)