From b4286df8c9bafdab1934cef99ccc0506ec4555e2 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 20 Jul 2018 14:46:58 +0200
Subject: Add builtin.concat(dir_path,name) overload

In particular, this allows:

export $out_root/libfoo/$import.target
---
 build2/function.cxx       |  2 ++
 build2/functions-name.cxx | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 build2/functions-name.cxx

diff --git a/build2/function.cxx b/build2/function.cxx
index 0b432d3..f1e0fdd 100644
--- a/build2/function.cxx
+++ b/build2/function.cxx
@@ -368,6 +368,7 @@ namespace build2
 
   void builtin_functions ();        // functions-builtin.cxx
   void filesystem_functions ();     // functions-filesystem.cxx
+  void name_functions ();           // functions-name.cxx
   void path_functions ();           // functions-path.cxx
   void process_functions ();        // functions-process.cxx
   void process_path_functions ();   // functions-process-path.cxx
@@ -381,6 +382,7 @@ namespace build2
     {
       builtin_functions ();
       filesystem_functions ();
+      name_functions ();
       path_functions ();
       process_functions ();
       process_path_functions ();
diff --git a/build2/functions-name.cxx b/build2/functions-name.cxx
new file mode 100644
index 0000000..1bdff11
--- /dev/null
+++ b/build2/functions-name.cxx
@@ -0,0 +1,28 @@
+// file      : build2/functions-name.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/function.hxx>
+#include <build2/variable.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  void
+  name_functions ()
+  {
+    // function_family f ("name");
+
+    // Name-specific overloads from builtins.
+    //
+    function_family b ("builtin");
+
+    b[".concat"] = [](dir_path d, name n)
+    {
+      d /= n.dir;
+      n.dir = move (d);
+      return n;
+    };
+  }
+}
-- 
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