re PR c++/18782 (ICE on invalid pointer-to-member declaration)

cp:
	PR c++/18782
	* decl.c (grokdeclarator): Make sure class in pointer to member is
	not a namespace.
testsuite:
	PR c++/18782
	* g++.dg/parse/ptrmem2.C: New.

From-SVN: r91681

gcc/cp/ChangeLog

+2004-12-03  Nathan Sidwell  <nathan@codesourcery.com>
+
+	PR c++/18782
+	* decl.c (grokdeclarator): Make sure class in pointer to member is
+	not a namespace.
+
 2004-12-02  Nathan Sidwell  <nathan@codesourcery.com>
 
 	PR c++/18318

gcc/cp/decl.c

@@ -7430,8 +7430,19 @@ grokdeclarator (const cp_declarator *declarator,
 	  else if (TREE_CODE (type) == METHOD_TYPE)
 	    type = build_ptrmemfunc_type (build_pointer_type (type));
 	  else if (declarator->kind == cdk_ptrmem)
-	    type = build_ptrmem_type (declarator->u.pointer.class_type,
-				      type);
+	    {
+	      /* We might have parsed a namespace as the class type.  */
+	      if (TREE_CODE (declarator->u.pointer.class_type)
+		  == NAMESPACE_DECL)
+		{
+		  error ("%qD is a namespace",
+			 declarator->u.pointer.class_type);
+		  type = build_pointer_type (type);
+		}
+	      else
+		type = build_ptrmem_type (declarator->u.pointer.class_type,
+					  type);
+	    }
 	  else
 	    type = build_pointer_type (type);
 

gcc/testsuite/ChangeLog

 2004-12-03  Nathan Sidwell  <nathan@codesourcery.com>
 
+	PR c++/18782
+	* g++.dg/parse/ptrmem2.C: New.
+
 	PR c++/18318
 	* g++.dg/template/new1.C: New.
 

gcc/testsuite/g++.dg/parse/ptrmem2.C

+// { dg-do compile }
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+// Contributed by Nathan Sidwell 2 Dec 2004 <nathan@codesourcery.com>
+
+// PR 18782: ICE with ptr-to-member
+// Origin:   Volker Reichelt <reichelt@gcc.gnu.org>
+
+namespace A {}
+
+int A::* p; // { dg-error "is a namespace" "" }