decl.c (grokfndecl): Return NULL_TREE instead of error_mark_node.

	* decl.c (grokfndecl): Return NULL_TREE instead of error_mark_node.
	(grokdeclarator): Don't expect error_mark_node from grokfndecl.
	* pt.c (maybe_process_partial_specialization): Complain about
	'template <>' on non-specialization.

From-SVN: r25225

gcc/cp/ChangeLog

+1999-02-13  Jason Merrill  <jason@yorick.cygnus.com>
+
+	* decl.c (grokfndecl): Return NULL_TREE instead of error_mark_node.
+	(grokdeclarator): Don't expect error_mark_node from grokfndecl.
+
+	* pt.c (maybe_process_partial_specialization): Complain about
+	'template <>' on non-specialization.
+
 1999-02-10  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* decl.c (grokdeclarator): Catch wierd declarators.

gcc/cp/decl.c

@@ -8344,7 +8344,7 @@ bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
    CHECK is 1 if we must find this method in CTYPE, 0 if we should
    not look, and -1 if we should not call `grokclassfn' at all.  
 
-   Returns `error_mark_node' if something goes wrong, after issuing
+   Returns `NULL_TREE' if something goes wrong, after issuing
    applicable error messages.  */
 
 static tree
@@ -8496,7 +8496,7 @@ grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
 	      /* Something like `template <class T> friend void f<T>()'.  */
 	      cp_error ("template-id `%D' in declaration of primary template", 
 			orig_declarator);
-	      return error_mark_node;
+	      return NULL_TREE;
 	    }
 
 	  /* A friend declaration of the form friend void f<>().  Record
@@ -8544,7 +8544,7 @@ grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
 					    2 * (funcdef_flag != 0) + 
 					    4 * (friendp != 0));
       if (decl == error_mark_node)
-	return error_mark_node;
+	return NULL_TREE;
 
       if ((! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
 	  && check)
@@ -8560,7 +8560,7 @@ grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
 	    return tmp;
 	}
       if (! grok_ctor_properties (ctype, decl))
-	return error_mark_node;
+	return NULL_TREE;
     }
   else
     {
@@ -8577,7 +8577,7 @@ grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
 					    2 * (funcdef_flag != 0) + 
 					    4 * (friendp != 0));
       if (decl == error_mark_node)
-	return error_mark_node;
+	return NULL_TREE;
 
       if (ctype != NULL_TREE
 	  && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
@@ -10931,7 +10931,7 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 			       virtualp, flags, quals, raises, attrlist,
 			       friendp ? -1 : 0, friendp, publicp, inlinep,
 			       funcdef_flag, template_count, in_namespace);
-	    if (decl == NULL_TREE || decl == error_mark_node)
+	    if (decl == NULL_TREE)
 	      return decl;
 #if 0
 	    /* This clobbers the attrs stored in `decl' from `attrlist'.  */
@@ -11178,11 +11178,6 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 	if (decl == NULL_TREE)
 	  return NULL_TREE;
 
-	/* Among other times, could occur from check_explicit_specialization
-	   returning an error_mark_node.  */
-	if (decl == error_mark_node)
-	  return error_mark_node;
-
 	if (staticp == 1)
 	  {
 	    int illegal_static = 0;

gcc/cp/pt.c

@@ -688,6 +688,8 @@ maybe_process_partial_specialization (type)
       else if (CLASSTYPE_TEMPLATE_INSTANTIATION (type))
 	cp_error ("specialization of `%T' after instantiation", type);
     }
+  else if (processing_specialization)
+    cp_error ("explicit specialization of non-template `%T'", type);
 }
 
 /* Retrieve the specialization (in the sense of [temp.spec] - a