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// Type parameter wildcards.
// Copyright (C) 2004, 2005 Free Software Foundation, Inc.
//
// This file is part of GCC.
//
// gcjx is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// gcjx is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with gcjx; see the file COPYING.LIB. If
// not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "typedefs.hh"
bool
model_wildcard::assignable_from_p (model_type *other)
{
if (other == null_type)
return true;
if (! other->reference_p ())
return false;
if (! bound)
return true;
if (is_super)
{
model_class *k = assert_cast<model_class *> (bound->type ());
return k->assignable_from_p (other);
}
model_class *k = assert_cast<model_class *> (other);
return k->assignable_from_p (bound->type ());
}
bool
model_wildcard::contains_p (model_class *other)
{
if (! bound)
// FIXME? This is done on the theory that no bound == Object.
return true;
model_class *k = assert_cast<model_class *> (bound->type ());
if (other == k)
return true;
if (! other->wildcard_p ())
return false;
model_wildcard *w = assert_cast<model_wildcard *> (other);
// FIXME: maybe a bound is ok?
if (w->super_p () != is_super || ! w->get_bound ())
return false;
model_class *other_bound = w->get_bound ();
if (is_super)
return other_bound->assignable_from_p (k);
return k->assignable_from_p (other_bound);
}
void
model_wildcard::resolve_hook (resolution_scope *scope)
{
if (bound)
{
bound->resolve (scope);
if (! bound->type ()->reference_p ())
throw error ("bound for wildcard parameter must be of reference type");
}
// We pretend our superclass is either Object, or the bounds type,
// depending on our setting.
if (bound && ! is_super)
{
model_class *k = assert_cast<model_class *> (bound->type ());
if (k->interface_p ())
{
std::list<ref_forwarding_type> ifaces;
ifaces.push_back (bound);
set_implements (ifaces);
}
else
set_superclass (bound);
}
}
model_class *
model_wildcard::apply_type_map (model_element *request,
const model_type_map &typemap)
{
if (! bound)
return this;
model_class *bound_class = assert_cast<model_class *> (bound->type ());
model_class *applied = bound_class->apply_type_map (request, typemap);
if (bound_class == applied)
return this;
// FIXME: ownership.
// FIXME: location from request? Or from 'this'?
model_wildcard *result = new model_wildcard (request->get_location (),
applied, is_super);
return result;
}
model_type *
model_wildcard::erasure ()
{
// FIXME: does this even make sense?
return global->get_compiler ()->java_lang_Object ();
}
std::string
model_wildcard::get_signature ()
{
std::string result;
if (! bound)
result = "*";
else
{
if (is_super)
result = "-";
else
result = "+";
result += bound->type ()->get_signature ();
}
return result;
}
std::string
model_wildcard::get_pretty_name () const
{
std::string result = "?";
if (bound)
result += ((is_super ? " super " : " extends ")
+ bound->type ()->get_pretty_name ());
return result;
}
void
model_wildcard::visit (visitor *v)
{
v->visit_wildcard (this, descriptor, name, is_super, bound);
}
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