From 70af0087d8efb3f2f7dc9ffdf2568419913f16da Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 30 Jun 2015 15:07:03 +0200
Subject: Group "see through" iteration, take 1

---
 build/target-key | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'build/target-key')

diff --git a/build/target-key b/build/target-key
index 3875a6a..d791d61 100644
--- a/build/target-key
+++ b/build/target-key
@@ -28,6 +28,13 @@ namespace build
     target* (*const factory) (dir_path, std::string, const std::string*);
     const std::string& (*const extension) (const target_key&, scope&);
     target* (*const search) (const prerequisite_key&);
+
+    bool
+    is_a (const std::type_index&) const; // Defined in target.cxx
+
+    template <typename T>
+    bool
+    is_a () const {return is_a (typeid (T));}
   };
 
   inline std::ostream&
-- 
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