cp-tree.h (decl_namespace_list): New macro.

        * cp-tree.h (decl_namespace_list): New macro.
        (struct saved_scope): Add decl_ns_list.
        * decl.c (mark_saved_scope): Mark it.
        * decl2.c: Lose static decl_namespace_list.
        (init_decl2): Don't save it.

From-SVN: r41316

gcc/cp/ChangeLog

+2001-04-12  Jason Merrill  <jason_merrill@redhat.com>
+
+	* cp-tree.h (decl_namespace_list): New macro.
+	(struct saved_scope): Add decl_ns_list.
+	* decl.c (mark_saved_scope): Mark it.
+	* decl2.c: Lose static decl_namespace_list.
+	(init_decl2): Don't save it.
+
 2001-04-12  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* cp-tree.h (warn_return_type, yylex): Delete redundant

gcc/cp/cp-tree.h

@@ -776,9 +776,11 @@ extern tree cp_global_trees[CPTI_MAX];
 
 /* Global state.  */
 
-struct saved_scope {
+struct saved_scope
+{
   tree old_bindings;
   tree old_namespace;
+  tree decl_ns_list;
   tree class_name;
   tree class_type;
   tree access_specifier;
@@ -809,6 +811,10 @@ struct saved_scope {
 
 #define current_namespace scope_chain->old_namespace
 
+/* The stack for namespaces of current declarations. */
+
+#define decl_namespace_list scope_chain->decl_ns_list
+
 /* IDENTIFIER_NODE: name of current class */
 
 #define current_class_name scope_chain->class_name

gcc/cp/decl.c

@@ -2422,6 +2422,7 @@ mark_saved_scope (arg)
       mark_binding_level (&t->class_bindings);
       ggc_mark_tree (t->old_bindings);
       ggc_mark_tree (t->old_namespace);
+      ggc_mark_tree (t->decl_ns_list);
       ggc_mark_tree (t->class_name);
       ggc_mark_tree (t->class_type);
       ggc_mark_tree (t->access_specifier);
@@ -5750,7 +5751,7 @@ unqualified_namespace_lookup (name, flags, spacesp)
      tree *spacesp;
 {
   tree b = make_node (CPLUS_BINDING);
-  tree initial = current_decl_namespace();
+  tree initial = current_decl_namespace ();
   tree scope = initial;
   tree siter;
   struct binding_level *level;

gcc/cp/decl2.c

@@ -125,11 +125,6 @@ tree static_dtors;
 /* The :: namespace. */
 
 tree global_namespace;
-
-/* The stack for namespaces of current declarations. */
-
-static tree decl_namespace_list;
-
 
 /* C (and C++) language-specific option variables.  */
 
@@ -5365,7 +5360,6 @@ handle_class_head (aggr, scope, id)
 void
 init_decl2 ()
 {
-  ggc_add_tree_root (&decl_namespace_list, 1);
   ggc_add_tree_varray_root (&deferred_fns, 1);
   ggc_add_tree_varray_root (&pending_statics, 1);
   ggc_add_tree_varray_root (&ssdf_decls, 1);

gcc/testsuite/g++.old-deja/g++.ns/template16.C

+// Test that pushing into a namespace for a definition doesn't affect
+// template instantiations.
+
+// Build don't link:
+
+namespace N {
+  template <class T> void f () { }
+  template <class T> struct A { friend void f<T>(); };
+};
+
+namespace M {
+  struct B;
+};
+
+struct M::B: public N::A<int> { };