[cfe-dev] printing name of owning anonymous structure in RecursiveASTVisitor::VisitFieldDecl?

[Yang Chen]

On 12/11/12 9:17 AM, Peeter Joot wrote:
> With an AST field visitor of the following form:
>
>    bool VisitFieldDecl( FieldDecl * f )
>    {
>       RecordDecl * r = f->getParent() ;
>
>       TypeSourceInfo * t = f->getTypeSourceInfo() ;
>
>       TypeLoc TL = t->getTypeLoc() ;
>
>       if ( const ArrayTypeLoc *Arr = dyn_cast<ArrayTypeLoc>(&TL) )
>       {
>          TL = Arr->getElementLoc() ;
>       }
>
>       const QualType & q = TL.getType() ;
>
>       cout
> << r->getName().str()
> << " : " << q.getAsString() << endl ;
>
>       return true ;
>    }
>
> I get a printout of
>
> <classname> : type-dependence.  Example:
>
> struct Test
> {
>    int a, b ;
> } ;
>
> gives:
>
> Test : int
> Test : int
>
> For anonymous structs like:
>
> struct TestA
> {
>    struct {
>       int a, b ;
>    } m ;
> } ;
>
> I do get a "name" for the dependent type m:
>
> TestA : struct <anonymous struct at asample2.cpp:8:4>
>
> However, when the AST visitor is called for the a, b fields in this 
> anonymous struct, my r->getName().str() call returns an empty string.
>
> I'm guessing I could get the "name" above, if I could get the QualType 
> from the 'RecordDecl * r' variable, but am unsure how to do so, 
> because getTypeSourceInfo() doesn't appear to be available to a 
> RecordDecl object.  How can I get the RecordDecl's QualType?

You can try this:
const Type *RT = r->getTypeForDecl();
QualType QT = RT->getCanonicalTypeInternal();

- Yang