decl.c (grokfndecl): Improve error-recovery.

* decl.c (grokfndecl): Improve error-recovery.
	* decl2.c (grokfield): Likewise.
	* pt.c (finish_member_template_decl): Likewise.

From-SVN: r22549

gcc/cp/ChangeLog

@@ -1,3 +1,9 @@
+1998-09-22  Mark Mitchell  <mark@markmitchell.com>
+
+	* decl.c (grokfndecl): Improve error-recovery.
+	* decl2.c (grokfield): Likewise.
+	* pt.c (finish_member_template_decl): Likewise.
+
 1998-09-20  Martin von Löwis  <loewis@informatik.hu-berlin.de>
 
 	* method.c (hack_identifier): Finding multiple members is always

gcc/cp/decl.c

@@ -7866,7 +7866,10 @@ bad_specifiers (object, type, virtualp, quals, inlinep, friendp, raises)
    or `volatile'.
    RAISES is a list of exceptions that this function can raise.
    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.  */
+   not look, and -1 if we should not call `grokclassfn' at all.  
+
+   Returns `error_mark_node' if something goes wrong, after issuing
+   applicable error messages.  */
 
 static tree
 grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
@@ -8046,7 +8049,7 @@ grokfndecl (ctype, type, declarator, orig_declarator, virtualp, flags, quals,
 	    return tmp;
 	}
       if (! grok_ctor_properties (ctype, decl))
-	return NULL_TREE;
+	return error_mark_node;
 
       if (check == 0 && ! current_function_decl)
 	{
@@ -10342,8 +10345,8 @@ 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)
-	      return NULL_TREE;
+	    if (decl == NULL_TREE || decl == error_mark_node)
+	      return decl;
 #if 0
 	    /* This clobbers the attrs stored in `decl' from `attrlist'.  */
 	    /* The decl and setting of decl_machine_attr is also turned off.  */

gcc/cp/decl2.c

@@ -1607,7 +1607,8 @@ grokfield (declarator, declspecs, init, asmspec_tree, attrlist)
 
   value = grokdeclarator (declarator, declspecs, FIELD, init != 0, NULL_TREE);
   if (! value || value == error_mark_node)
-    return NULL_TREE; /* friend or constructor went bad.  */
+    /* friend or constructor went bad.  */
+    return value;
 
   /* Pass friendly classes back.  */
   if (TREE_CODE (value) == VOID_TYPE)

gcc/cp/pt.c

@@ -204,6 +204,10 @@ finish_member_template_decl (template_parameters, decl)
 
   if (decl == NULL_TREE || decl == void_type_node)
     return NULL_TREE;
+  else if (decl == error_mark_node)
+    /* By returning NULL_TREE, the parser will just ignore this
+       declaration.  We have already issued the error.  */
+    return NULL_TREE;
   else if (TREE_CODE (decl) == TREE_LIST)
     {
       /* Assume that the class is the only declspec.  */
@@ -229,7 +233,6 @@ finish_member_template_decl (template_parameters, decl)
     } 
   else
     cp_error ("invalid member template declaration `%D'", decl);
-	
 
   return error_mark_node;
 }
@@ -584,6 +587,7 @@ void
 check_specialization_scope ()
 {
   tree scope = current_scope ();
+
   /* [temp.expl.spec] 
      
      An explicit specialization shall be declared in the namespace of
@@ -596,6 +600,7 @@ check_specialization_scope ()
   if (scope && TREE_CODE (scope) != NAMESPACE_DECL)
     cp_error ("explicit specialization in non-namespace scope `%D'",
 	      scope);
+
   /* [temp.expl.spec] 
 
      In an explicit specialization declaration for a member of a class

gcc/testsuite/g++.old-deja/g++.other/friend4.C

@@ -11,11 +11,11 @@
 template <class A, class B> void foo();
 template <class C> class bar {
   int i;
-  template <class B> friend void foo<C,B>();
+  template <class B> friend void foo<C,B>(); // ERROR - bogus declaration
 };
 template <class A, class B> void foo() {
-  bar<A> baz; baz.i = 1;
-  bar<int> buz; buz.i = 1; // ERROR - foo<void,void> cannot access bar<int>::i - XFAIL *-*-*
+  bar<A> baz; baz.i = 1;   // ERROR - foo cannot access bar<int>::i
+  bar<int> buz; buz.i = 1; // ERROR - foo cannot access bar<int>::i
 }
 int main() {
   foo<void,void>();