[cfe-dev] accessing template arguments from libclang

[Anthony Scopatz]

Hello All,

Any guidance that you can provide would be most beneficial since we really
need this feature for the xdress project <http://xdress.org/>.  Thanks!

Be Well
Anthony


Another ping for this message: let me know if this is the wrong forum
> for questions about libclang.
> Geoffrey
> On Thu, Aug 15, 2013 at 10:36 AM, Geoffrey Irving <irving at naml.us<http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev>>
> wrote:
> >* In case the previous email was too long, here's a quick summary:
> *>
> >* I am trying to parse the code
> *>
> >
> >* class Toaster : Base<int,7> { ... };
> *>
> >* I can get to the base specifier corresponding to Base<int,7> and from
> there
> *>* to a RECORD type, but there appears to be no way to access the
> template
> *>* arguments of a template reference from either the Python or C
> bindings to
> *>* clang. If I'm correct that this isn't exposed yet, what's the right
> way to
> *>* do it?
> *>
> >* Thanks,
> *>* Geoffrey
> *>
> >
> >* On Tue, Aug 13, 2013 at 12:26 PM, Geoffrey Irving <irving at naml.us<http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev>>
> wrote:
> *>>
> >>* I am trying to parse the following code with the Python interface to
> *>>* libclang (full listing attached):
> *>>
> >>* class Toaster : Base<int,7> { ... };
> *>>
> >>* Unfortunately, traversing cursors via getChildren gives me the
> following
> *>>* tree (see clang_dump() in autodescribe.py for the code that
> generated this
> *>>* tree):
> *>>
> >>* CLASS_DECL Toaster
> *>>* CXX_BASE_SPECIFIER None : Base<int,7>
> *>>* TEMPLATE_REF None : Base
> *>>* INTEGER_LITERAL None : 7
> *>>* CXX_ACCESS_SPEC_DECL PUBLIC : public:
> *>>* ...
> *>>
> >>* The base specifier only seems to mention "Base" and "7", not "int".
> *>>* Should I be able to fully inspect Base<int,7> using cursors?
> *>>
> >>* I also tried traversing the Type object corresponding to Base<int,7>,
> but
> *>>* I don't see any methods for accessing template parameters either in
> *>>* libclang's Python bindings or in the original C. If I'm correct that
> the
> *>>* functionality is missing from the C layer, what's the easiest way to
> add it?
> *>>* The C++ structure of template references seems quite complicated (I
> imagine
> *>>* by necessity :)).
> *>>
> >>* Background: I'm working on a clang-based front end for the xdress
> Python
> *>>* binding generator project. I've already made a couple minor
> improvements to
> *>>* the libclang Python bindings (exposing formatDiagnostic and the
> details of
> *>>* access specifiers), and am happy to contribute these back once I'm
> done.
> *>>
> >>* Thanks for any suggestions!
> *>>* Geoffrey*
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