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/**
** \file ast/object-visitor.hh
** \brief Provide default visits for object-related nodes.
*/
#pragma once
#include <ast/visitor.hh>
namespace ast
{
/** GenObjectVisitor<CONSTNESS-SELECTOR> provides default visit
methods for object-related nodes. This class is meant to factor
the code visiting object-related nodes.
ast::GenObjectVisitor inherits virtually from ast::GenVisitor
to allow diamond inheritance, notably for a ``compatibility''
purpose with ast::GenDefaultVisitor.
For instance, bind::Binder, a visitor that handles bindings for
an AST without objects, inherits from ast::DefaultVisitor to
factor default (``empty'') traversal implementations for
non-object-related nodes, and from ast::ObjectVisitor for
object-related nodes.
\verbatim
/ast::Visitor/
^
(virtual) | (virtual)
,--------------+--------------.
| |
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/ast::DefaultVisitor/ /ast::ObjectVisitor/
^ ^
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`--------------+--------------'
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bind::Binder
\endverbatim
*/
template <template <typename> class Const>
class GenObjectVisitor : virtual public GenVisitor<Const>
{
public:
/// Super class type.
using super_type = GenVisitor<Const>;
// Import overloaded virtual functions.
using super_type::operator();
/// Convenient abbreviation.
template <typename Type> using const_t = typename Const<Type>::type;
/** \name Ctor & dtor.
** \{ */
/// Construct an object visitor.
GenObjectVisitor();
/// Destroy an object visitor.
virtual ~GenObjectVisitor();
/** \} */
/// \name Object-related visits.
/// \{
void operator()(const_t<ClassTy>& e) override;
void operator()(const_t<MethodChunk>& e) override;
void operator()(const_t<MethodDec>& e) override;
void operator()(const_t<MethodCallExp>& e) override;
void operator()(const_t<ObjectExp>& e) override;
/// \}
};
/// Shorthand for a const visitor.
using ObjectConstVisitor = GenObjectVisitor<misc::constify_traits>;
/// Shorthand for a non const visitor.
using ObjectVisitor = GenObjectVisitor<misc::id_traits>;
#ifdef SWIG
%template(ObjectConstVisitor) GenObjectVisitor<misc::constify_traits>;
%template(ObjectVisitor) GenObjectVisitor<misc::id_traits>;
#endif
} // namespace ast
#include <ast/object-visitor.hxx>
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