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diff --git a/src/boost/libs/poly_collection/example/basic_base.cpp b/src/boost/libs/poly_collection/example/basic_base.cpp
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+++ b/src/boost/libs/poly_collection/example/basic_base.cpp
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+/* Copyright 2016-2017 Joaquin M Lopez Munoz.
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org/libs/poly_collection for library home page.
+ */
+
+/* basic usage of boost::base_collection */
+
+#include <algorithm>
+#include <boost/poly_collection/base_collection.hpp>
+#include <random>
+#include "rolegame.hpp"
+
+int main()
+{
+//[basic_base_1
+//=  #include <boost/poly_collection/base_collection.hpp>
+//=  ...
+//=
+  boost::base_collection<sprite> c;
+
+  std::mt19937                 gen{92748}; // some arbitrary random seed
+  std::discrete_distribution<> rnd{{1,1,1}};
+  for(int i=0;i<8;++i){        // assign each type with 1/3 probability
+    switch(rnd(gen)){ 
+      case 0: c.insert(warrior{i});break;
+      case 1: c.insert(juggernaut{i});break;
+      case 2: c.insert(goblin{i});break;
+    }
+  }
+//]
+
+  auto render=[&](){
+//[basic_base_2
+    const char* comma="";
+    for(const sprite& s:c){
+      std::cout<<comma;
+      s.render(std::cout);
+      comma=",";
+    }
+    std::cout<<"\n";
+//]
+  };
+  render();
+
+//[basic_base_3
+  c.insert(goblin{8});
+//]
+  render();
+
+//[basic_base_4
+  // find element with id==7 and remove it
+  auto it=std::find_if(c.begin(),c.end(),[](const sprite& s){return s.id==7;});
+  c.erase(it);
+//]
+  render();
+}