From ca41ca8f9a6b21588248e5fee1a013363f3f52a8 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 13 Mar 2015 14:34:24 +0200
Subject: Add support for "first" and "last" execution modes

---
 build/target.cxx | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

(limited to 'build/target.cxx')

diff --git a/build/target.cxx b/build/target.cxx
index 15d57ca..347a382 100644
--- a/build/target.cxx
+++ b/build/target.cxx
@@ -16,11 +16,6 @@ namespace build
 {
   // recipe
   //
-  const recipe empty_recipe;
-  const recipe noop_recipe (&noop_recipe_function);
-  const recipe default_recipe (
-    static_cast<recipe_function*> (&execute_prerequisites));
-
   target_state
   noop_recipe_function (action, target&)
   {
@@ -28,6 +23,18 @@ namespace build
     return target_state::unchanged;
   }
 
+  static target_state
+  default_recipe_function (action a, target& t)
+  {
+    return current_mode == execution_mode::first
+      ? execute_prerequisites (a, t)
+      : reverse_execute_prerequisites (a, t);
+  }
+
+  const recipe empty_recipe;
+  const recipe noop_recipe (&noop_recipe_function);
+  const recipe default_recipe (&default_recipe_function);
+
   // target
   //
   ostream&
-- 
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