@@ -20942,7 +20942,9 @@ unify (tree tparms, tree targs, tree parm, tree arg, int strict,
template-parameter exactly, except that a template-argument
deduced from an array bound may be of any integral type.
The non-type parameter might use already deduced type parameters. */
+ ++processing_template_decl;
tparm = tsubst (TREE_TYPE (parm), targs, 0, NULL_TREE);
+ --processing_template_decl;
if (tree a = type_uses_auto (tparm))
{
tparm = do_auto_deduction (tparm, arg, a, complain, adc_unify);
new file mode 100644
@@ -0,0 +1,18 @@
+// PR c++/82331
+// { dg-options -std=c++17 }
+
+template <auto>
+class X;
+
+template <typename R, typename... A, R (*F) (A...)>
+class X<F> {
+public:
+ static R call (A... args)
+ {
+ return (*F)(args...);
+ }
+};
+
+int func (int a, int b) { return a + b; }
+
+int test () { return X<&func>::call(1, 2); }