Add distance algo

Author: kullingk

CMakeLists.txt

@@ -141,6 +141,7 @@ IF( CPPCORE_BUILD_UNITTESTS )
 
     SET( cppcore_container_test_src
         test/container/TArrayTest.cpp
+        test/container/TAlgorithmTest.cpp
         test/container/THashMapTest.cpp
         test/container/TListTest.cpp
         test/container/TQueueTest.cpp

include/cppcore/Container/TAlgorithm.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <cassert>
+
+namespace cppcore {
+    
+template<class TIt>
+inline size_t distance(TIt begin, TIt end) {
+    assert(begin < end);
+    const size_t distance = end - begin;
+    return distance;
+}
+
+} // namespace cppcore