From a12a739f053bd50ec6461b565afd865bc8e35403 Mon Sep 17 00:00:00 2001
From: Ichthyostega <prg@ichthyostega.de>
Date: Sun, 4 Jan 2015 14:23:12 +0100
Subject: [PATCH] allow for iterative access to the snapshot data in the lookup
 table

---
 src/lib/diff/index-table.hpp                 | 18 +++++++++++++-----
 tests/library/diff/diff-index-table-test.cpp | 14 ++++++++++++++
 2 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/src/lib/diff/index-table.hpp b/src/lib/diff/index-table.hpp
index 292584fd3..c96df8a26 100644
--- a/src/lib/diff/index-table.hpp
+++ b/src/lib/diff/index-table.hpp
@@ -76,11 +76,19 @@ namespace diff{
             }
         }
       
-      size_t
-      size()  const
-        {
-          return data_.size();
-        }
+      /* === forwarded sequence access === */
+      
+      using iterator = typename std::vector<VAL>::iterator;
+      using const_iterator = typename std::vector<VAL>::const_iterator;
+      
+      iterator       begin()       { return data_.begin(); }
+      iterator       end()         { return data_.end();   }
+      const_iterator begin() const { return data_.begin(); }
+      const_iterator end()   const { return data_.end();   }
+      
+      size_t         size()  const { return data_.size();  }
+      
+      
       
       
       VAL const&
diff --git a/tests/library/diff/diff-index-table-test.cpp b/tests/library/diff/diff-index-table-test.cpp
index bb1139e8f..36ca475cb 100644
--- a/tests/library/diff/diff-index-table-test.cpp
+++ b/tests/library/diff/diff-index-table-test.cpp
@@ -78,6 +78,7 @@ namespace test{
         {
           simpleUsage();
           verifySnapshot();
+          sequenceIteration();
           duplicateDetection();
           copy_and_move();
         }
@@ -144,6 +145,19 @@ namespace test{
         }
       
       
+      void
+      sequenceIteration()
+        {
+          DataSeq data({a5,a2,a1,a4,a3});
+          
+          size_t i = 0;
+          for (auto elm : Index(data))
+            {
+              CHECK (elm == data[i++]);
+            }
+        }
+      
+      
       void
       duplicateDetection()
         {