PR c++/49102

	* call.c (convert_arg_to_ellipsis): Call force_rvalue.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@174101 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 032c8e2..c00e064 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2011-05-23  Jason Merrill  <jason@redhat.com>
 
+       PR c++/49102
+       * call.c (convert_arg_to_ellipsis): Call force_rvalue.
+
        PR c++/49105
        * typeck.c (cp_build_c_cast): Don't strip cv-quals when
        converting to reference.

diff --git a/gcc/cp/call.c b/gcc/cp/call.c
index 8503f5e..ff3dc06 100644 (file)
--- a/gcc/cp/call.c
+++ b/gcc/cp/call.c
@@ -5905,10 +5905,13 @@ convert_arg_to_ellipsis (tree arg)
       /* In a template (or ill-formed code), we can have an incomplete type
         even after require_complete_type, in which case we don't know
         whether it has trivial copy or not.  */
-      && COMPLETE_TYPE_P (arg_type)
-      && (type_has_nontrivial_copy_init (arg_type)
-         || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (arg_type)))
+      && COMPLETE_TYPE_P (arg_type))
     {
+      /* Build up a real lvalue-to-rvalue conversion in case the
+        copy constructor is trivial but not callable.  */
+      if (CLASS_TYPE_P (arg_type))
+       force_rvalue (arg, tf_warning_or_error);
+
       /* [expr.call] 5.2.2/7:
         Passing a potentially-evaluated argument of class type (Clause 9)
         with a non-trivial copy constructor or a non-trivial destructor
@@ -5920,7 +5923,9 @@ convert_arg_to_ellipsis (tree arg)
 
         If the call appears in the context of a sizeof expression,
         it is not potentially-evaluated.  */
-      if (cp_unevaluated_operand == 0)
+      if (cp_unevaluated_operand == 0
+         && (type_has_nontrivial_copy_init (arg_type)
+             || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (arg_type)))
        error ("cannot pass objects of non-trivially-copyable "
               "type %q#T through %<...%>", arg_type);
     }

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index f58dea3..4b447ea 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,7 @@
 2011-05-23  Jason Merrill  <jason@redhat.com>
 
+       * g++.dg/cpp0x/defaulted28.C: New.
+
        * g++.dg/cpp0x/sfinae25.C: New.
 
        * g++.dg/cpp0x/rv-cast2.C: New.

diff --git a/gcc/testsuite/g++.dg/cpp0x/defaulted28.C b/gcc/testsuite/g++.dg/cpp0x/defaulted28.C
new file mode 100644 (file)
index 0000000..15caef6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/defaulted28.C
@@ -0,0 +1,15 @@
+// PR c++/49102
+// { dg-options -std=c++0x }
+
+struct A {
+  A() = default;
+
+private:
+  A(A const&) = default;       // { dg-error "private" }
+};
+
+void f(...) { }
+int main() {
+  A a;
+  f(a);                        // { dg-error "this context" }
+}