libstdc++: ranges::iter_move should perform ADL-only lookup (LWG 3247)

	* include/bits/iterator_concepts.h (iter_move): Add declaration to
	prevent unqualified lookup finding a suitable declaration (LWG 3247).

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 067cf83..689bee8 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,8 @@
 2020-02-19  Jonathan Wakely  <jwakely@redhat.com>
 
+       * include/bits/iterator_concepts.h (iter_move): Add declaration to
+       prevent unqualified lookup finding a suitable declaration (LWG 3247).
+
        * include/std/memory_resource (polymorphic_allocator::allocate)
        (polymorphic_allocator::allocate_object): Change type of exception to
        bad_array_new_length (LWG 3237).

diff --git a/libstdc++-v3/include/bits/iterator_concepts.h b/libstdc++-v3/include/bits/iterator_concepts.h
index 792b326..08e6222 100644 (file)
--- a/libstdc++-v3/include/bits/iterator_concepts.h
+++ b/libstdc++-v3/include/bits/iterator_concepts.h
@@ -79,6 +79,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   {
     namespace __cust_imove
     {
+      void iter_move();
+
       template<typename _Tp>
        concept __adl_imove
          = (std::__detail::__class_or_enum<remove_reference_t<_Tp>>)