re PR c++/27979 (conversion check confused by enum bitfields)

	PR c++/27979
	* call.c (standard_conversion): Strip cv-qualifiers from bitfield
	types.
	PR c++/27979
	* g++.dg/expr/bitfield2.C: New test.

From-SVN: r114733

gcc/cp/ChangeLog

 2006-06-16  Mark Mitchell  <mark@codesourcery.com>
 
+	PR c++/27979
+	* call.c (standard_conversion): Strip cv-qualifiers from bitfield
+	types.
+
 	PR c++/27884
 	* decl.c (have_extern_spec): Remove.
 	(start_decl): Do not check have_extern_spec.

gcc/cp/call.c

@@ -632,7 +632,7 @@ standard_conversion (tree to, tree from, tree expr, bool c_cast_p,
 	  tree bitfield_type;
 	  bitfield_type = is_bitfield_expr_with_lowered_type (expr);
 	  if (bitfield_type)
-	    from = bitfield_type;
+	    from = strip_top_quals (bitfield_type);
 	}
       conv = build_conv (ck_rvalue, from, conv);
     }

gcc/testsuite/ChangeLog

 2006-06-16  Mark Mitchell  <mark@codesourcery.com>
 
+	PR c++/27979
+	* g++.dg/expr/bitfield2.C: New test. 
+
 	PR c++/27884
-	* g++.dg/parse/linkage2.C: New test
+	* g++.dg/parse/linkage2.C: New test.
 
 2006-06-16  Richard Guenther  <rguenther@suse.de>
 

gcc/testsuite/g++.dg/expr/bitfield2.C

+// PR c++/27979
+
+class Ast
+{
+  enum AstKind { };
+  const AstKind kind : 8;
+  void foo(AstKind k) { }
+  void bar(void) { foo(kind); }
+};