[PATCH 2/7] [gdbsupport] Add parameterless iterator_range constructor

[Tom de Vries <tdevries@suse.de>]

I noticed that there's no convenient way to create an empty range in
iterator_range.  Add this.
---
 gdb/unittests/iterator-range-selftests.c | 2 +-
 gdbsupport/iterator-range.h              | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gdb/unittests/iterator-range-selftests.c b/gdb/unittests/iterator-range-selftests.c
index a05531d95e0..7c0f7f57484 100644
--- a/gdb/unittests/iterator-range-selftests.c
+++ b/gdb/unittests/iterator-range-selftests.c
@@ -67,7 +67,7 @@ test_iterator_range ()
 
   {
     /* Empty range.  */
-    auto r3 = int_array_iterator_range (end, end);
+    auto r3 = int_array_iterator_range ();
     test_iterator_range_1 (r3, nullptr, 0, end, end);
   }
 
diff --git a/gdbsupport/iterator-range.h b/gdbsupport/iterator-range.h
index 42185546f5a..98be1e67152 100644
--- a/gdbsupport/iterator-range.h
+++ b/gdbsupport/iterator-range.h
@@ -27,6 +27,11 @@ struct iterator_range
 {
   using iterator = IteratorType;
 
+  /* Create an empty range.  */
+  explicit iterator_range ()
+    : iterator_range (IteratorType {}, IteratorType {})
+  {}
+
   /* Create an iterator_range using BEGIN as the begin iterator.
 
      Assume that the end iterator can be default-constructed.  */
-- 
2.51.0