[C++ PATCH] cleanup check_field_decls

https://gcc.gnu.org/ml/gcc-patches/2019-11/msg00012.html
	cp/
	* class.c (check_field_decls): Refactor.

	testsuite/
	* g++.dg/template/fn.C: New.

From-SVN: r277707

gcc/cp/ChangeLog

+2019-11-01  Nathan Sidwell  <nathan@acm.org>
+
+	* class.c (check_field_decls): Refactor.
+
 2019-10-31  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/90947

gcc/testsuite/ChangeLog

+2019-11-01  Nathan Sidwell  <nathan@acm.org>
+
+	* g++.dg/template/fn.C: New.
+
 2019-11-01  Kewen Lin  <linkw@gcc.gnu.org>
 
 	PR testsuite/92127

gcc/testsuite/g++.dg/template/fn.C

+// instantiation cannot turn a data member into a function!
+
+typedef int (frib) (int);
+
+template <typename T> class X 
+{
+  T v; // { dg-error "declared function" }
+};
+
+X<frib> v;