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c++: base template friend [PR52625]

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Here we were mistakenly treating the injected-class-name as a partial
specialization.

gcc/cp/ChangeLog:

	PR c++/52625
	* pt.c (maybe_process_partial_specialization): Check
	DECL_SELF_REFERENCE_P.

gcc/testsuite/ChangeLog:

	PR c++/52625
	* g++.dg/template/friend70.C: New test.
This commit is contained in:
Jason Merrill 2021-04-07 15:38:07 -04:00
parent a528594cf9
commit b40d45cb19
2 changed files with 13 additions and 0 deletions
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4
gcc/cp/pt.c
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@ -984,6 +984,10 @@ maybe_process_partial_specialization (tree type)
if (CLASS_TYPE_P (type) && CLASSTYPE_LAMBDA_EXPR (type))
return type;
/* An injected-class-name is not a specialization. */
if (DECL_SELF_REFERENCE_P (TYPE_NAME (type)))
return type;
if (TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
{
error ("name of class shadows template template parameter %qD",

9
gcc/testsuite/g++.dg/template/friend70.C Normal file
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@ -0,0 +1,9 @@
// PR c++/52625
template<class>
class base {};
class derived : public base<derived>
{
template<class> friend class base;
};