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re PR c++/56395 (ICE, Segmentation fault in tsubst) 

PR c++/56395
	* tree.c (strip_typedefs): Strip typedefs from TYPENAME_TYPE template
	args.

From-SVN: r196232
This commit is contained in:
Jason Merrill 2013-02-22 17:26:08 -05:00 committed by Jason Merrill
parent 4d9ea42dda
commit 5637104c56
3 changed files with 59 additions and 3 deletions
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6
gcc/cp/ChangeLog
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@ -1,3 +1,9 @@
2013-02-22 Jason Merrill <jason@redhat.com>
PR c++/56395
* tree.c (strip_typedefs): Strip typedefs from TYPENAME_TYPE template
args.
2013-02-19 Jakub Jelinek <jakub@redhat.com>
Backported from mainline

32
gcc/cp/tree.c
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@ -1207,9 +1207,35 @@ strip_typedefs (tree t)
}
break;
case TYPENAME_TYPE:
result = make_typename_type (strip_typedefs (TYPE_CONTEXT (t)),
TYPENAME_TYPE_FULLNAME (t),
typename_type, tf_none);
{
tree fullname = TYPENAME_TYPE_FULLNAME (t);
if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
{
tree args = TREE_OPERAND (fullname, 1);
tree new_args = copy_node (args);
bool changed = false;
int i;
for (i = 0; i < TREE_VEC_LENGTH (args); ++i)
{
tree arg = TREE_VEC_ELT (args, i);
tree strip_arg;
if (TYPE_P (arg))
strip_arg = strip_typedefs (arg);
else
strip_arg = strip_typedefs_expr (arg);
TREE_VEC_ELT (new_args, i) = strip_arg;
if (strip_arg != arg)
changed = true;
}
if (changed)
fullname = lookup_template_function (TREE_OPERAND (fullname, 0),
new_args);
else
ggc_free (new_args);
}
result = make_typename_type (strip_typedefs (TYPE_CONTEXT (t)),
fullname, typename_type, tf_none);
}
break;
case DECLTYPE_TYPE:
result = strip_typedefs_expr (DECLTYPE_TYPE_EXPR (t));

24
gcc/testsuite/g++.dg/template/typename19.C Normal file
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@ -0,0 +1,24 @@
// PR c++/56395
struct A
{
template <class T> struct B { };
};
template <class T> struct D { };
template <class T, class U> struct C
{
typedef T _Type;
typedef typename T::template B<_Type> _BType;
D<_BType> d;
};
template <class T> struct C<T,T>
{
typedef T _Type;
typedef typename T::template B<_Type> _BType;
D<_BType> d;
};
C<A,A> c;