decl2.c (merge_functions): Remove duplicates.

	* decl2.c (merge_functions): Remove duplicates.
	* decl2.c: Add -f{no-,}implicit-inline-templates.
	(lang_decode_option): Unset it if -frepo.
	(import_export_decl): Check it.
	* decl.c (lookup_name_real): Template parms also take precedence
	over implicit typename.  Only warn if yylex.

From-SVN: r22800

gcc/cp/ChangeLog

 1998-10-03  Jason Merrill  <jason@yorick.cygnus.com>
 
+	* decl2.c (merge_functions): Remove duplicates.
+
+	* decl2.c: Add -f{no-,}implicit-inline-templates.
+	(lang_decode_option): Unset it if -frepo.
+	(import_export_decl): Check it.
+
+	* decl.c (lookup_name_real): Template parms also take precedence
+	over implicit typename.  Only warn if yylex.
+
 	* typeck.c (build_conditional_expr): Only fold if ifexp is an
 	INTEGER_CST.
 

gcc/cp/decl.c

@@ -5167,25 +5167,43 @@ lookup_name_real (name, prefer_type, nonclass, namespaces_only)
   else
     val = unqualified_namespace_lookup (name, flags);
 
+  /* Any other name takes precedence over an implicit typename.  Warn the
+     user about this potentially confusing lookup.  */
   if (classval && TREE_CODE (val) == TYPE_DECL
       && TREE_CODE (TREE_TYPE (val)) == TYPENAME_TYPE
       && TREE_TYPE (TREE_TYPE (val)))
     {
-      tree nsval = unqualified_namespace_lookup (name, flags);
+      if (locval == NULL_TREE)
+	locval = unqualified_namespace_lookup (name, flags);
 
-      if (val && nsval && TREE_CODE (nsval) == TYPE_DECL)
+      if (locval && val != locval)
 	{
-	  static int explained;
-	  cp_warning ("namespace-scope type `%#D'", nsval);
-	  cp_warning
-	    ("  is used instead of `%D' from dependent base class", val);
-	  if (! explained)
+	  tree subtype;
+
+	  val = locval;
+
+	  /* To avoid redundant warnings, only warn when lexing, and the
+	     decls are significantly different.  */
+	  subtype = TREE_TYPE (TREE_TYPE (classval));
+	  if (yylex
+	      && ! (TREE_CODE (locval) == TEMPLATE_DECL
+		    && CLASSTYPE_TEMPLATE_INFO (subtype)
+		    && CLASSTYPE_TI_TEMPLATE (subtype) == locval)
+	      && ! (TREE_CODE (locval) == TYPE_DECL
+		    && comptypes (TREE_TYPE (locval), subtype, 1)))
 	    {
-	      explained = 1;
-	      cp_warning ("  (use `typename %D' if that's what you meant)",
-			  val);
+	      static int explained;
+
+	      cp_warning ("lookup of `%D' finds `%#D'", name, locval);
+	      cp_warning
+		("  instead of `%D' from dependent base class", classval);
+	      if (! explained)
+		{
+		  explained = 1;
+		  cp_warning ("  (use `typename %D' if that's what you meant)",
+			      classval);
+		}
 	    }
-	  val = nsval;
 	}
     }
 
@@ -5507,7 +5525,7 @@ init_decl_processing ()
   tree string_ftype_ptr_ptr, int_ftype_string_string;
   tree sizetype_endlink;
   tree ptr_ftype, ptr_ftype_unsigned, ptr_ftype_sizetype;
-  tree void_ftype, void_ftype_int, void_ftype_ptr, ptr_ftype_void;
+  tree void_ftype, void_ftype_int, void_ftype_ptr;
 
   /* Have to make these distinct before we try using them.  */
   lang_name_cplusplus = get_identifier ("C++");

gcc/cp/decl2.c

@@ -173,6 +173,12 @@ int flag_alt_external_templates;
 
 int flag_implicit_templates = 1;
 
+/* Nonzero means that implicit instantiations of inline templates will be
+   emitted if needed, even if instantiations of non-inline templates
+   aren't.  */
+
+int flag_implicit_inline_templates = 1;
+
 /* Nonzero means allow numerical priorities on constructors.  */
 
 #ifdef USE_INIT_PRIORITY
@@ -474,6 +480,7 @@ static struct { char *string; int *variable; int on_value;} lang_f_options[] =
   {"implement-inlines", &flag_implement_inlines, 1},
   {"external-templates", &flag_external_templates, 1},
   {"implicit-templates", &flag_implicit_templates, 1},
+  {"implicit-inline-templates", &flag_implicit_inline_templates, 1},
   {"init-priority", &flag_init_priority, 1},
   {"huge-objects", &flag_huge_objects, 1},
   {"conserve-space", &flag_conserve_space, 1},
@@ -2856,7 +2863,8 @@ import_export_decl (decl)
       DECL_NOT_REALLY_EXTERN (decl) = 1;
       if ((DECL_IMPLICIT_INSTANTIATION (decl)
 	   || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
-	  && (flag_implicit_templates || DECL_THIS_INLINE (decl)))
+	  && (flag_implicit_templates
+	      || (flag_implicit_inline_templates && DECL_THIS_INLINE (decl))))
 	{
 	  if (!TREE_PUBLIC (decl))
 	    /* Templates are allowed to have internal linkage.  See 
@@ -4118,22 +4126,22 @@ add_using_namespace (user, used, indirect)
     add_using_namespace (TREE_PURPOSE (t), used, 1);
 }
 
-/* Combines two sets of overloaded functions into an OVERLOAD chain.
-   The first list becomes the tail of the result. */
+/* Combines two sets of overloaded functions into an OVERLOAD chain, removing
+   duplicates.  The first list becomes the tail of the result.
+
+   The algorithm is O(n^2).  */
 
 static tree
 merge_functions (s1, s2)
      tree s1;
      tree s2;
 {
-  if (TREE_CODE (s2) == OVERLOAD)
-    while (s2)
-      {
-	s1 = build_overload (OVL_FUNCTION (s2), s1);
-	s2 = OVL_CHAIN (s2);
-      }
-  else
-    s1 = build_overload (s2, s1);
+  for (; s2; s2 = OVL_NEXT (s2))
+    {
+      tree fn = OVL_CURRENT (s2);
+      if (! ovl_member (fn, s1))
+	s1 = build_overload (fn, s1);
+    }
   return s1;
 }