re PR c++/36855 (__has_trivial_destructor() returns false for reference types.)

/cp
2008-07-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/36855
	* semantics.c (trait_expr_value): Update __has_trivial_destructor
	semantics to the current WP (N2691).

/testsuite
2008-07-17  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/36855
	* g++.dg/ext/has_trivial_destructor.C: Rename to...
	* g++.dg/ext/has_trivial_destructor-1.C: ... this.
	* g++.dg/ext/has_trivial_destructor-2.C: New.

From-SVN: r137914

gcc/cp/ChangeLog

+2008-07-17  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/36855
+	* semantics.c (trait_expr_value): Update __has_trivial_destructor
+	semantics to the current WP (N2691).
+
 2008-07-16  Dodji Seketeli  <dseketel@redhat.com>
 
 	PR c++/13699
-	* gcc/cp/name-lookup.c (lookup_extern_c_fun_binding_in_all_ns):
-	New function.
+	* name-lookup.c (lookup_extern_c_fun_binding_in_all_ns): New function.
 	(pushdecl_maybe_friend): Check if a redeclaration of extern C function
 	complies with exception specification constraints.
 

gcc/cp/semantics.c

@@ -4730,7 +4730,7 @@ trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
 
     case CPTK_HAS_TRIVIAL_DESTRUCTOR:
       type1 = strip_array_types (type1);
-      return (pod_type_p (type1)
+      return (pod_type_p (type1) || type_code1 == REFERENCE_TYPE
 	      || (CLASS_TYPE_P (type1)
 		  && TYPE_HAS_TRIVIAL_DESTRUCTOR (type1)));
 

gcc/testsuite/ChangeLog

+2008-07-17  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/36855
+	* g++.dg/ext/has_trivial_destructor.C: Rename to...
+	* g++.dg/ext/has_trivial_destructor-1.C: ... this.
+	* g++.dg/ext/has_trivial_destructor-2.C: New.
+
 2008-07-17  Paolo Bonzini  <bonzini@gnu.org>
 
 	PR rtl-optimization/36753

gcc/testsuite/g++.dg/ext/has_trivial_destructor-2.C

+// PR c++/36855
+
+typedef char assert_0 [__has_trivial_destructor (int&) ? 1 : -1];