Add process_path.{recall,effect} build2 functions

1 files changed, 35 insertions, 0 deletions

diff --git a/build2/functions-process-path.cxx b/build2/functions-process-path.cxx
new file mode 100644
index 0000000..7069c33
--- /dev/null
+++ b/build2/functions-process-path.cxx
@@ -0,0 +1,35 @@
+// file      : build2/functions-process-path.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <build2/function>
+#include <build2/variable>
+
+using namespace std;
+
+namespace build2
+{
+  void
+  process_path_functions ()
+  {
+    function_family f ("process_path");
+
+    // As discussed in value_traits<process_path>, we always have recall.
+    //
+    f["recall"] = &process_path::recall;
+    f["effect"] = [](process_path p)
+      {
+        return move (p.effect.empty () ? p.recall : p.effect);
+      };
+
+    //@@ TMP kludge
+    //
+    f["effect"] = [](names n)
+      {
+        auto p (value_traits<process_path>::convert (
+                  move (n[0]), n.size () > 1 ? &n[1] : nullptr));
+
+        return move (p.effect.empty () ? p.recall : p.effect);
+      };
+  }
+}