Add std::back_inserter() to utility.hxx

1 files changed, 2 insertions, 1 deletions

diff --git a/libbuild2/utility.hxx b/libbuild2/utility.hxx
index e27eec2..2cb0738 100644
--- a/libbuild2/utility.hxx
+++ b/libbuild2/utility.hxx
@@ -9,7 +9,7 @@
 #include <string>      // to_string()
 #include <utility>     // move(), forward(), declval(), make_pair(), swap()
 #include <cassert>     // assert()
-#include <iterator>    // make_move_iterator()
+#include <iterator>    // make_move_iterator(), back_inserter()
 #include <algorithm>   // *
 #include <functional>  // ref(), cref()
 #include <type_traits>
@@ -51,6 +51,7 @@ namespace build2
   using std::make_tuple;
   using std::make_shared;
   using std::make_move_iterator;
+  using std::back_inserter;
   using std::to_string;
   using std::stoul;
   using std::stoull;