[cfe-dev] How can I foint out if a ValueDecl is an array?

[Eli Friedman]

On Tue, Dec 18, 2012 at 6:57 PM, Peeter Joot <peeter.joot at gmail.com> wrote:
> I use some code like so:
>
> inline QualType getQualTypeForDecl( DeclaratorDecl * f )
> {
>    TypeSourceInfo * pThisFieldSourceInfo = f->getTypeSourceInfo() ;
>
>    TypeLoc thisFieldTypeLoc = pThisFieldSourceInfo->getTypeLoc() ;
>
>    // don't care if it's an array, just want the basic underlying type of
> the array.
>    if ( const ArrayTypeLoc * pTypeLocIfArray = dyn_cast<ArrayTypeLoc>(
> &thisFieldTypeLoc ) )
>    {
>       thisFieldTypeLoc = pTypeLocIfArray->getElementLoc() ;
>    }
>
>    return thisFieldTypeLoc.getType() ;
> }
>
> to strip off one level of array from a field declaration.  Can you use
> something like that?

Hmm... that isn't actually checking whether the type of the decl is an
array type; it's checking whether the outermost declarator is an array
declarator.  (This makes a difference for e.g. "typedef int T[2]; T
x;", where x is an array but does not have an array declarator.)  My
first reaction to "is this decl an array" would be
"VD->getType()->isArrayType()", which checks the actual type.  But I
guess both are useful, depending on what you're doing.

-Eli