PR c++/49389

	* typeck2.c (build_m_component_ref): Preserve rvalueness.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175043 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index a6c8665..5970440 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2011-06-14  Jason Merrill  <jason@redhat.com>
 
+       PR c++/49389
+       * typeck2.c (build_m_component_ref): Preserve rvalueness.
+
        PR c++/49369
        * class.c (build_base_path): Fix cv-quals in unevaluated context.
 

diff --git a/gcc/cp/typeck2.c b/gcc/cp/typeck2.c
index fa64d1d..d72f57e 100644 (file)
--- a/gcc/cp/typeck2.c
+++ b/gcc/cp/typeck2.c
@@ -1551,6 +1551,7 @@ build_m_component_ref (tree datum, tree component)
 
   if (TYPE_PTRMEM_P (ptrmem_type))
     {
+      bool is_lval = real_lvalue_p (datum);
       tree ptype;
 
       /* Compute the type of the field, as described in [expr.ref].
@@ -1573,7 +1574,11 @@ build_m_component_ref (tree datum, tree component)
       datum = build2 (POINTER_PLUS_EXPR, ptype,
                      fold_convert (ptype, datum),
                      build_nop (sizetype, component));
-      return cp_build_indirect_ref (datum, RO_NULL, tf_warning_or_error);
+      datum = cp_build_indirect_ref (datum, RO_NULL, tf_warning_or_error);
+      /* If the object expression was an rvalue, return an rvalue.  */
+      if (!is_lval)
+       datum = move (datum);
+      return datum;
     }
   else
     return build2 (OFFSET_REF, type, datum, component);

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7d5e46a..1ca37e3 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2011-06-14  Jason Merrill  <jason@redhat.com>
 
+       PR c++/49389
+       * g++.dg/cpp0x/rv-dotstar.C: New.
+
        PR c++/49369
        * g++.dg/cpp0x/decltype30.C: New.
 

diff --git a/gcc/testsuite/g++.dg/cpp0x/rv-dotstar.C b/gcc/testsuite/g++.dg/cpp0x/rv-dotstar.C
new file mode 100644 (file)
index 0000000..65aac8d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/rv-dotstar.C
@@ -0,0 +1,13 @@
+// PR c++/49389
+// { dg-options -std=c++0x }
+
+template<class T> T&& val();
+
+struct A {};
+
+typedef decltype(val<A>().*val<int A::*>()) type;
+
+template<class> struct assert_type;
+template<> struct assert_type<int&&> {};
+
+assert_type<type> test;