re PR c++/29022 (ICE using operator int in invalid class hierarchy)

PR c++/29022
	* parser.c (cp_parser_class_head): Move processing
	of any base classes to...
	(cp_parser_class_specifier) ...here. Take an extra
	tree* parameter for any base classes. Only process
	them if the opening brace was found.

	* g++.dg/inherit/virtual2.C: New test.
	* g++.dg/inherit/virtual3.C: Likewise.
	* g++.old-deja/g++.bugs/900121_05.C: Adjust error markers.
	* g++.dg/inherit/error2.C: Likewise.
	* g++.dg/template/instantiate1.C: Likewise.

From-SVN: r119318

gcc/cp/ChangeLog

@@ -1,3 +1,12 @@
+2006-11-29  Lee Millward  <lee.millward@codesourcery.com> 
+
+	PR c++/29022
+	* parser.c (cp_parser_class_head): Move processing
+	of any base classes to...
+	(cp_parser_class_specifier) ...here. Take an extra
+	tree* parameter for any base classes. Only process
+	them if the opening brace was found.
+	
 2006-11-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/29735

gcc/cp/parser.c

@@ -1639,7 +1639,7 @@ static tree cp_parser_class_name
 static tree cp_parser_class_specifier
   (cp_parser *);
 static tree cp_parser_class_head
-  (cp_parser *, bool *, tree *);
+  (cp_parser *, bool *, tree *, tree *);
 static enum tag_types cp_parser_class_key
   (cp_parser *);
 static void cp_parser_member_specification_opt
@@ -13090,13 +13090,15 @@ cp_parser_class_specifier (cp_parser* parser)
   bool saved_in_function_body;
   tree old_scope = NULL_TREE;
   tree scope = NULL_TREE;
+  tree bases;
 
   push_deferring_access_checks (dk_no_deferred);
 
   /* Parse the class-head.  */
   type = cp_parser_class_head (parser,
 			       &nested_name_specifier_p,
-			       &attributes);
+			       &attributes,
+			       &bases);
   /* If the class-head was a semantic disaster, skip the entire body
      of the class.  */
   if (!type)
@@ -13113,6 +13115,19 @@ cp_parser_class_specifier (cp_parser* parser)
       return error_mark_node;
     }
 
+  /* Process the base classes. If they're invalid, skip the 
+     entire class body.  */
+  if (!xref_basetypes (type, bases))
+    {
+      cp_parser_skip_to_closing_brace (parser);
+
+      /* Consuming the closing brace yields better error messages
+         later on.  */
+      cp_lexer_consume_token (parser->lexer);
+      pop_deferring_access_checks ();
+      return error_mark_node;
+    }
+
   /* Issue an error message if type-definitions are forbidden here.  */
   cp_parser_check_type_definition (parser);
   /* Remember that we are defining one more class.  */
@@ -13268,7 +13283,8 @@ cp_parser_class_specifier (cp_parser* parser)
 static tree
 cp_parser_class_head (cp_parser* parser,
 		      bool* nested_name_specifier_p,
-		      tree *attributes_p)
+		      tree *attributes_p,
+		      tree *bases)
 {
   tree nested_name_specifier;
   enum tag_types class_key;
@@ -13281,7 +13297,6 @@ cp_parser_class_head (cp_parser* parser,
   bool invalid_explicit_specialization_p = false;
   tree pushed_scope = NULL_TREE;
   unsigned num_templates;
-  tree bases;
 
   /* Assume no nested-name-specifier will be present.  */
   *nested_name_specifier_p = false;
@@ -13569,6 +13584,8 @@ cp_parser_class_head (cp_parser* parser,
       type = NULL_TREE;
       goto done;
     }
+  else if (type == error_mark_node)
+    type = NULL_TREE;
 
   /* We will have entered the scope containing the class; the names of
      base classes should be looked up in that context.  For example:
@@ -13577,15 +13594,11 @@ cp_parser_class_head (cp_parser* parser,
        struct A::C : B {};
 
      is valid.  */
-  bases = NULL_TREE;
+  *bases = NULL_TREE;
 
   /* Get the list of base-classes, if there is one.  */
   if (cp_lexer_next_token_is (parser->lexer, CPP_COLON))
-    bases = cp_parser_base_clause (parser);
-
-  /* Process the base classes.  */
-  if (!xref_basetypes (type, bases))
-    type = NULL_TREE;
+    *bases = cp_parser_base_clause (parser);
 
  done:
   /* Leave the scope given by the nested-name-specifier.  We will

gcc/testsuite/ChangeLog

@@ -1,3 +1,12 @@
+2006-11-29  Lee Millward  <lee.millward@codesourcery.com>
+
+	PR c++/29022
+	* g++.dg/inherit/virtual2.C: New test.
+	* g++.dg/inherit/virtual3.C: Likewise.
+	* g++.old-deja/g++.bugs/900121_05.C: Adjust error markers.
+	* g++.dg/inherit/error2.C: Likewise.
+	* g++.dg/template/instantiate1.C: Likewise.
+	
 2006-11-28  Andrew Pinski  <pinskia@gmail.com>
 
 	PR tree-opt/29984

gcc/testsuite/g++.dg/inherit/error2.C

@@ -3,14 +3,14 @@
 
 struct A
 {
-  virtual A* foo();
+  virtual A* foo();    // { dg-error "overriding" }
 };
 
 struct B : virtual A;  // { dg-error "before" }
 
 struct C : A
 {
-  virtual B* foo();
+  virtual B* foo();    // { dg-error "invalid covariant" }
 };
 
 B* C::foo() { return 0; }

gcc/testsuite/g++.dg/inherit/virtual2.C

@@ -0,0 +1,13 @@
+//PR c++/29022
+
+struct A
+{
+  operator int();
+};
+
+struct B : virtual A, A<0> {};  // { dg-error "token" }
+
+int foo(B &b)
+{
+  return b;                     // { dg-error "cannot convert" }
+}

gcc/testsuite/g++.dg/inherit/virtual3.C

@@ -0,0 +1,13 @@
+//PR c++/29022
+
+struct A
+{
+  operator int();
+};
+
+struct B : virtual A;	// { dg-error "token" }
+
+int foo(B &b)
+{
+  return b;		// { dg-error "cannot convert" }
+}

gcc/testsuite/g++.dg/template/instantiate1.C

@@ -16,6 +16,6 @@ template <class T> struct Z {	// { dg-error "declaration" }
   Y<Z<T> > y;			// { dg-error "instantiated" }
 };
 
-struct ZZ : Z<int>		// { dg-error "instantiated" }
+struct ZZ : Z<int>
 {
 };

gcc/testsuite/g++.old-deja/g++.bugs/900121_05.C

@@ -24,7 +24,7 @@ union u1 {
   int u1_member_1;
 };
 
-struct s1 : public u1 {			/* { dg-error "" } base class is a union */
+struct s1 : public u1 {			/* { dg-error "base type" } */
   int s1_member_0;
 };