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.cxx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'build/target.cxx')

diff --git a/build/target.cxx b/build/target.cxx
index 6cd1fc9..ec96779 100644
--- a/build/target.cxx
+++ b/build/target.cxx
@@ -17,6 +17,18 @@ using namespace std;
 
 namespace build
 {
+  // target_type
+  //
+  bool target_type::
+  is_a (const type_index& id) const
+  {
+    for (const target_type* p (this); p != nullptr; p = p->base)
+      if (p->id == id)
+        return true;
+
+    return false;
+  }
+
   // target_state
   //
   static const char* target_state_[] = {
-- 
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