From 9fa5f73d00905568e8979d0c93ec4a8f645c81d5 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 9 Aug 2016 11:31:53 +0200
Subject: Implement support for C compilation

We now have two new modules: cc (c-common) and c.
---
 build2/rule | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'build2/rule')

diff --git a/build2/rule b/build2/rule
index 03e4bf2..6d4a580 100644
--- a/build2/rule
+++ b/build2/rule
@@ -13,6 +13,9 @@
 
 namespace build2
 {
+  // @@ This is an ugly mess that is overdue for redesign. Perhaps
+  //    something similar to variable value storage?
+  //
   class match_result
   {
   public:
@@ -56,6 +59,14 @@ namespace build2
     {
       return target != nullptr || prerequisite != nullptr;
     }
+
+    template <typename T>
+    T&
+    as_target () const
+    {
+      return static_cast<T&> (
+        target != nullptr ? *target : *prerequisite->target);
+    }
   };
 
   class rule
-- 
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