diff --git a/ndnboost/concept_check.hpp b/ndnboost/concept_check.hpp
new file mode 100644
index 0000000..0b7bf54
--- /dev/null
+++ b/ndnboost/concept_check.hpp
@@ -0,0 +1,1083 @@
+//
+// (C) Copyright Jeremy Siek 2000.
+// Copyright 2002 The Trustees of Indiana University.
+//
+// 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)
+//
+// Revision History:
+//   05 May   2001: Workarounds for HP aCC from Thomas Matelich. (Jeremy Siek)
+//   02 April 2001: Removed limits header altogether. (Jeremy Siek)
+//   01 April 2001: Modified to use new <ndnboost/limits.hpp> header. (JMaddock)
+//
+
+// See http://www.boost.org/libs/concept_check for documentation.
+
+#ifndef BOOST_CONCEPT_CHECKS_HPP
+# define BOOST_CONCEPT_CHECKS_HPP
+
+# include <ndnboost/concept/assert.hpp>
+
+# include <ndnboost/iterator.hpp>
+# include <ndnboost/type_traits/conversion_traits.hpp>
+# include <utility>
+# include <ndnboost/type_traits/is_same.hpp>
+# include <ndnboost/type_traits/is_void.hpp>
+# include <ndnboost/mpl/assert.hpp>
+# include <ndnboost/mpl/bool.hpp>
+# include <ndnboost/detail/workaround.hpp>
+# include <ndnboost/detail/iterator.hpp>
+
+# include <ndnboost/concept/usage.hpp>
+# include <ndnboost/concept/detail/concept_def.hpp>
+
+namespace ndnboost
+{
+
+  //
+  // Backward compatibility
+  //
+
+  template <class Model>
+  inline void function_requires(Model* = 0)
+  {
+      BOOST_CONCEPT_ASSERT((Model));
+  }
+  template <class T> inline void ignore_unused_variable_warning(T const&) {}
+
+#  define BOOST_CLASS_REQUIRE(type_var, ns, concept)    \
+    BOOST_CONCEPT_ASSERT((ns::concept<type_var>))
+
+#  define BOOST_CLASS_REQUIRE2(type_var1, type_var2, ns, concept)   \
+    BOOST_CONCEPT_ASSERT((ns::concept<type_var1,type_var2>))
+
+#  define BOOST_CLASS_REQUIRE3(tv1, tv2, tv3, ns, concept)  \
+    BOOST_CONCEPT_ASSERT((ns::concept<tv1,tv2,tv3>))
+
+#  define BOOST_CLASS_REQUIRE4(tv1, tv2, tv3, tv4, ns, concept) \
+    BOOST_CONCEPT_ASSERT((ns::concept<tv1,tv2,tv3,tv4>))
+
+
+  //
+  // Begin concept definitions
+  //
+  BOOST_concept(Integer, (T))
+  {
+      BOOST_CONCEPT_USAGE(Integer)
+        {
+            x.error_type_must_be_an_integer_type();
+        }
+   private:
+      T x;
+  };
+
+  template <> struct Integer<char> {};
+  template <> struct Integer<signed char> {};
+  template <> struct Integer<unsigned char> {};
+  template <> struct Integer<short> {};
+  template <> struct Integer<unsigned short> {};
+  template <> struct Integer<int> {};
+  template <> struct Integer<unsigned int> {};
+  template <> struct Integer<long> {};
+  template <> struct Integer<unsigned long> {};
+# if defined(BOOST_HAS_LONG_LONG)
+  template <> struct Integer< ::ndnboost::long_long_type> {};
+  template <> struct Integer< ::ndnboost::ulong_long_type> {};
+# elif defined(BOOST_HAS_MS_INT64)
+  template <> struct Integer<__int64> {};
+  template <> struct Integer<unsigned __int64> {};
+# endif
+
+  BOOST_concept(SignedInteger,(T)) {
+    BOOST_CONCEPT_USAGE(SignedInteger) {
+      x.error_type_must_be_a_signed_integer_type();
+    }
+   private:
+    T x;
+  };
+  template <> struct SignedInteger<signed char> { };
+  template <> struct SignedInteger<short> {};
+  template <> struct SignedInteger<int> {};
+  template <> struct SignedInteger<long> {};
+# if defined(BOOST_HAS_LONG_LONG)
+  template <> struct SignedInteger< ::ndnboost::long_long_type> {};
+# elif defined(BOOST_HAS_MS_INT64)
+  template <> struct SignedInteger<__int64> {};
+# endif
+
+  BOOST_concept(UnsignedInteger,(T)) {
+    BOOST_CONCEPT_USAGE(UnsignedInteger) {
+      x.error_type_must_be_an_unsigned_integer_type();
+    }
+   private:
+    T x;
+  };
+
+  template <> struct UnsignedInteger<unsigned char> {};
+  template <> struct UnsignedInteger<unsigned short> {};
+  template <> struct UnsignedInteger<unsigned int> {};
+  template <> struct UnsignedInteger<unsigned long> {};
+# if defined(BOOST_HAS_LONG_LONG)
+  template <> struct UnsignedInteger< ::ndnboost::ulong_long_type> {};
+# elif defined(BOOST_HAS_MS_INT64)
+  template <> struct UnsignedInteger<unsigned __int64> {};
+# endif
+
+  //===========================================================================
+  // Basic Concepts
+
+  BOOST_concept(DefaultConstructible,(TT))
+  {
+    BOOST_CONCEPT_USAGE(DefaultConstructible) {
+      TT a;               // require default constructor
+      ignore_unused_variable_warning(a);
+    }
+  };
+
+  BOOST_concept(Assignable,(TT))
+  {
+    BOOST_CONCEPT_USAGE(Assignable) {
+#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
+      a = b;             // require assignment operator
+#endif
+      const_constraints(b);
+    }
+   private:
+    void const_constraints(const TT& x) {
+#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
+      a = x;              // const required for argument to assignment
+#else
+      ignore_unused_variable_warning(x);
+#endif
+    }
+   private:
+    TT a;
+    TT b;
+  };
+
+
+  BOOST_concept(CopyConstructible,(TT))
+  {
+    BOOST_CONCEPT_USAGE(CopyConstructible) {
+      TT a(b);            // require copy constructor
+      TT* ptr = &a;       // require address of operator
+      const_constraints(a);
+      ignore_unused_variable_warning(ptr);
+    }
+   private:
+    void const_constraints(const TT& a) {
+      TT c(a);            // require const copy constructor
+      const TT* ptr = &a; // require const address of operator
+      ignore_unused_variable_warning(c);
+      ignore_unused_variable_warning(ptr);
+    }
+    TT b;
+  };
+
+#if (defined _MSC_VER)
+# pragma warning( push )
+# pragma warning( disable : 4510 ) // default constructor could not be generated
+# pragma warning( disable : 4610 ) // object 'class' can never be instantiated - user-defined constructor required
+#endif
+  // The SGI STL version of Assignable requires copy constructor and operator=
+  BOOST_concept(SGIAssignable,(TT))
+  {
+    BOOST_CONCEPT_USAGE(SGIAssignable) {
+      TT c(a);
+#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
+      a = b;              // require assignment operator
+#endif
+      const_constraints(b);
+      ignore_unused_variable_warning(c);
+    }
+   private:
+    void const_constraints(const TT& x) {
+      TT c(x);
+#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
+      a = x;              // const required for argument to assignment
+#endif
+      ignore_unused_variable_warning(c);
+    }
+    TT a;
+    TT b;
+  };
+#if (defined _MSC_VER)
+# pragma warning( pop )
+#endif
+
+  BOOST_concept(Convertible,(X)(Y))
+  {
+    BOOST_CONCEPT_USAGE(Convertible) {
+      Y y = x;
+      ignore_unused_variable_warning(y);
+    }
+   private:
+    X x;
+  };
+
+  // The C++ standard requirements for many concepts talk about return
+  // types that must be "convertible to bool".  The problem with this
+  // requirement is that it leaves the door open for evil proxies that
+  // define things like operator|| with strange return types.  Two
+  // possible solutions are:
+  // 1) require the return type to be exactly bool
+  // 2) stay with convertible to bool, and also
+  //    specify stuff about all the logical operators.
+  // For now we just test for convertible to bool.
+  template <class TT>
+  void require_boolean_expr(const TT& t) {
+    bool x = t;
+    ignore_unused_variable_warning(x);
+  }
+
+  BOOST_concept(EqualityComparable,(TT))
+  {
+    BOOST_CONCEPT_USAGE(EqualityComparable) {
+      require_boolean_expr(a == b);
+      require_boolean_expr(a != b);
+    }
+   private:
+    TT a, b;
+  };
+
+  BOOST_concept(LessThanComparable,(TT))
+  {
+    BOOST_CONCEPT_USAGE(LessThanComparable) {
+      require_boolean_expr(a < b);
+    }
+   private:
+    TT a, b;
+  };
+
+  // This is equivalent to SGI STL's LessThanComparable.
+  BOOST_concept(Comparable,(TT))
+  {
+    BOOST_CONCEPT_USAGE(Comparable) {
+      require_boolean_expr(a < b);
+      require_boolean_expr(a > b);
+      require_boolean_expr(a <= b);
+      require_boolean_expr(a >= b);
+    }
+   private:
+    TT a, b;
+  };
+
+#define BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(OP,NAME)    \
+  BOOST_concept(NAME, (First)(Second))                          \
+  {                                                             \
+      BOOST_CONCEPT_USAGE(NAME) { (void)constraints_(); }                         \
+     private:                                                   \
+        bool constraints_() { return a OP b; }                  \
+        First a;                                                \
+        Second b;                                               \
+  }
+
+#define BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(OP,NAME)    \
+  BOOST_concept(NAME, (Ret)(First)(Second))                 \
+  {                                                         \
+      BOOST_CONCEPT_USAGE(NAME) { (void)constraints_(); }                     \
+  private:                                                  \
+      Ret constraints_() { return a OP b; }                 \
+      First a;                                              \
+      Second b;                                             \
+  }
+
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(==, EqualOp);
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(!=, NotEqualOp);
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<, LessThanOp);
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<=, LessEqualOp);
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>, GreaterThanOp);
+  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>=, GreaterEqualOp);
+
+  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(+, PlusOp);
+  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(*, TimesOp);
+  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(/, DivideOp);
+  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(-, SubtractOp);
+  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(%, ModOp);
+
+  //===========================================================================
+  // Function Object Concepts
+
+  BOOST_concept(Generator,(Func)(Return))
+  {
+      BOOST_CONCEPT_USAGE(Generator) { test(is_void<Return>()); }
+
+   private:
+      void test(ndnboost::mpl::false_)
+      {
+          // Do we really want a reference here?
+          const Return& r = f();
+          ignore_unused_variable_warning(r);
+      }
+
+      void test(ndnboost::mpl::true_)
+      {
+          f();
+      }
+
+      Func f;
+  };
+
+  BOOST_concept(UnaryFunction,(Func)(Return)(Arg))
+  {
+      BOOST_CONCEPT_USAGE(UnaryFunction) { test(is_void<Return>()); }
+
+   private:
+      void test(ndnboost::mpl::false_)
+      {
+          f(arg);               // "priming the pump" this way keeps msvc6 happy (ICE)
+          Return r = f(arg);
+          ignore_unused_variable_warning(r);
+      }
+
+      void test(ndnboost::mpl::true_)
+      {
+          f(arg);
+      }
+
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
+      // Declare a dummy construktor to make gcc happy.
+      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
+      // (warning: non-static reference "const double& ndnboost::UnaryFunction<YourClassHere>::arg"
+      // in class without a constructor [-Wuninitialized])
+      UnaryFunction();
+#endif
+
+      Func f;
+      Arg arg;
+  };
+
+  BOOST_concept(BinaryFunction,(Func)(Return)(First)(Second))
+  {
+      BOOST_CONCEPT_USAGE(BinaryFunction) { test(is_void<Return>()); }
+   private:
+      void test(ndnboost::mpl::false_)
+      {
+          f(first,second);
+          Return r = f(first, second); // require operator()
+          (void)r;
+      }
+
+      void test(ndnboost::mpl::true_)
+      {
+          f(first,second);
+      }
+
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
+      // Declare a dummy constructor to make gcc happy.
+      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
+      // (warning: non-static reference "const double& ndnboost::BinaryFunction<YourClassHere>::arg"
+      // in class without a constructor [-Wuninitialized])
+      BinaryFunction();
+#endif
+
+      Func f;
+      First first;
+      Second second;
+  };
+
+  BOOST_concept(UnaryPredicate,(Func)(Arg))
+  {
+    BOOST_CONCEPT_USAGE(UnaryPredicate) {
+      require_boolean_expr(f(arg)); // require operator() returning bool
+    }
+   private:
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
+      // Declare a dummy constructor to make gcc happy.
+      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
+      // (warning: non-static reference "const double& ndnboost::UnaryPredicate<YourClassHere>::arg"
+      // in class without a constructor [-Wuninitialized])
+      UnaryPredicate();
+#endif
+
+    Func f;
+    Arg arg;
+  };
+
+  BOOST_concept(BinaryPredicate,(Func)(First)(Second))
+  {
+    BOOST_CONCEPT_USAGE(BinaryPredicate) {
+      require_boolean_expr(f(a, b)); // require operator() returning bool
+    }
+   private:
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
+      // Declare a dummy constructor to make gcc happy.
+      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
+      // (warning: non-static reference "const double& ndnboost::BinaryPredicate<YourClassHere>::arg"
+      // in class without a constructor [-Wuninitialized])
+      BinaryPredicate();
+#endif
+    Func f;
+    First a;
+    Second b;
+  };
+
+  // use this when functor is used inside a container class like std::set
+  BOOST_concept(Const_BinaryPredicate,(Func)(First)(Second))
+    : BinaryPredicate<Func, First, Second>
+  {
+    BOOST_CONCEPT_USAGE(Const_BinaryPredicate) {
+      const_constraints(f);
+    }
+   private:
+    void const_constraints(const Func& fun) {
+      // operator() must be a const member function
+      require_boolean_expr(fun(a, b));
+    }
+#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
+                      && BOOST_WORKAROUND(__GNUC__, > 3)))
+      // Declare a dummy constructor to make gcc happy.
+      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
+      // (warning: non-static reference "const double& ndnboost::Const_BinaryPredicate<YourClassHere>::arg"
+      // in class without a constructor [-Wuninitialized])
+      Const_BinaryPredicate();
+#endif
+
+    Func f;
+    First a;
+    Second b;
+  };
+
+  BOOST_concept(AdaptableGenerator,(Func)(Return))
+    : Generator<Func, typename Func::result_type>
+  {
+      typedef typename Func::result_type result_type;
+
+      BOOST_CONCEPT_USAGE(AdaptableGenerator)
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
+      }
+  };
+
+  BOOST_concept(AdaptableUnaryFunction,(Func)(Return)(Arg))
+    : UnaryFunction<Func, typename Func::result_type, typename Func::argument_type>
+  {
+      typedef typename Func::argument_type argument_type;
+      typedef typename Func::result_type result_type;
+
+      ~AdaptableUnaryFunction()
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
+          BOOST_CONCEPT_ASSERT((Convertible<Arg, argument_type>));
+      }
+  };
+
+  BOOST_concept(AdaptableBinaryFunction,(Func)(Return)(First)(Second))
+    : BinaryFunction<
+          Func
+        , typename Func::result_type
+        , typename Func::first_argument_type
+        , typename Func::second_argument_type
+      >
+  {
+      typedef typename Func::first_argument_type first_argument_type;
+      typedef typename Func::second_argument_type second_argument_type;
+      typedef typename Func::result_type result_type;
+
+      ~AdaptableBinaryFunction()
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
+          BOOST_CONCEPT_ASSERT((Convertible<First, first_argument_type>));
+          BOOST_CONCEPT_ASSERT((Convertible<Second, second_argument_type>));
+      }
+  };
+
+  BOOST_concept(AdaptablePredicate,(Func)(Arg))
+    : UnaryPredicate<Func, Arg>
+    , AdaptableUnaryFunction<Func, bool, Arg>
+  {
+  };
+
+  BOOST_concept(AdaptableBinaryPredicate,(Func)(First)(Second))
+    : BinaryPredicate<Func, First, Second>
+    , AdaptableBinaryFunction<Func, bool, First, Second>
+  {
+  };
+
+  //===========================================================================
+  // Iterator Concepts
+
+  BOOST_concept(InputIterator,(TT))
+    : Assignable<TT>
+    , EqualityComparable<TT>
+  {
+      typedef typename ndnboost::detail::iterator_traits<TT>::value_type value_type;
+      typedef typename ndnboost::detail::iterator_traits<TT>::difference_type difference_type;
+      typedef typename ndnboost::detail::iterator_traits<TT>::reference reference;
+      typedef typename ndnboost::detail::iterator_traits<TT>::pointer pointer;
+      typedef typename ndnboost::detail::iterator_traits<TT>::iterator_category iterator_category;
+
+      BOOST_CONCEPT_USAGE(InputIterator)
+      {
+        BOOST_CONCEPT_ASSERT((SignedInteger<difference_type>));
+        BOOST_CONCEPT_ASSERT((Convertible<iterator_category, std::input_iterator_tag>));
+
+        TT j(i);
+        (void)*i;           // require dereference operator
+        ++j;                // require preincrement operator
+        i++;                // require postincrement operator
+      }
+   private:
+    TT i;
+  };
+
+  BOOST_concept(OutputIterator,(TT)(ValueT))
+    : Assignable<TT>
+  {
+    BOOST_CONCEPT_USAGE(OutputIterator) {
+
+      ++i;                // require preincrement operator
+      i++;                // require postincrement operator
+      *i++ = t;           // require postincrement and assignment
+    }
+   private:
+    TT i, j;
+    ValueT t;
+  };
+
+  BOOST_concept(ForwardIterator,(TT))
+    : InputIterator<TT>
+  {
+      BOOST_CONCEPT_USAGE(ForwardIterator)
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<
+              BOOST_DEDUCED_TYPENAME ForwardIterator::iterator_category
+            , std::forward_iterator_tag
+          >));
+
+          typename InputIterator<TT>::reference r = *i;
+          ignore_unused_variable_warning(r);
+      }
+
+   private:
+      TT i;
+  };
+
+  BOOST_concept(Mutable_ForwardIterator,(TT))
+    : ForwardIterator<TT>
+  {
+      BOOST_CONCEPT_USAGE(Mutable_ForwardIterator) {
+        *i++ = *i;         // require postincrement and assignment
+      }
+   private:
+      TT i;
+  };
+
+  BOOST_concept(BidirectionalIterator,(TT))
+    : ForwardIterator<TT>
+  {
+      BOOST_CONCEPT_USAGE(BidirectionalIterator)
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<
+              BOOST_DEDUCED_TYPENAME BidirectionalIterator::iterator_category
+            , std::bidirectional_iterator_tag
+          >));
+
+          --i;                // require predecrement operator
+          i--;                // require postdecrement operator
+      }
+   private:
+      TT i;
+  };
+
+  BOOST_concept(Mutable_BidirectionalIterator,(TT))
+    : BidirectionalIterator<TT>
+    , Mutable_ForwardIterator<TT>
+  {
+      BOOST_CONCEPT_USAGE(Mutable_BidirectionalIterator)
+      {
+          *i-- = *i;                  // require postdecrement and assignment
+      }
+   private:
+      TT i;
+  };
+
+  BOOST_concept(RandomAccessIterator,(TT))
+    : BidirectionalIterator<TT>
+    , Comparable<TT>
+  {
+      BOOST_CONCEPT_USAGE(RandomAccessIterator)
+      {
+          BOOST_CONCEPT_ASSERT((Convertible<
+              BOOST_DEDUCED_TYPENAME BidirectionalIterator<TT>::iterator_category
+            , std::random_access_iterator_tag
+          >));
+
+          i += n;             // require assignment addition operator
+          i = i + n; i = n + i; // require addition with difference type
+          i -= n;             // require assignment subtraction operator
+          i = i - n;                  // require subtraction with difference type
+          n = i - j;                  // require difference operator
+          (void)i[n];                 // require element access operator
+      }
+
+   private:
+    TT a, b;
+    TT i, j;
+      typename ndnboost::detail::iterator_traits<TT>::difference_type n;
+  };
+
+  BOOST_concept(Mutable_RandomAccessIterator,(TT))
+    : RandomAccessIterator<TT>
+    , Mutable_BidirectionalIterator<TT>
+  {
+      BOOST_CONCEPT_USAGE(Mutable_RandomAccessIterator)
+      {
+          i[n] = *i;                  // require element access and assignment
+      }
+   private:
+    TT i;
+    typename ndnboost::detail::iterator_traits<TT>::difference_type n;
+  };
+
+  //===========================================================================
+  // Container s
+
+  BOOST_concept(Container,(C))
+    : Assignable<C>
+  {
+    typedef typename C::value_type value_type;
+    typedef typename C::difference_type difference_type;
+    typedef typename C::size_type size_type;
+    typedef typename C::const_reference const_reference;
+    typedef typename C::const_pointer const_pointer;
+    typedef typename C::const_iterator const_iterator;
+
+      BOOST_CONCEPT_USAGE(Container)
+      {
+          BOOST_CONCEPT_ASSERT((InputIterator<const_iterator>));
+          const_constraints(c);
+      }
+
+   private:
+      void const_constraints(const C& cc) {
+          i = cc.begin();
+          i = cc.end();
+          n = cc.size();
+          n = cc.max_size();
+          b = cc.empty();
+      }
+      C c;
+      bool b;
+      const_iterator i;
+      size_type n;
+  };
+
+  BOOST_concept(Mutable_Container,(C))
+    : Container<C>
+  {
+      typedef typename C::reference reference;
+      typedef typename C::iterator iterator;
+      typedef typename C::pointer pointer;
+
+      BOOST_CONCEPT_USAGE(Mutable_Container)
+      {
+          BOOST_CONCEPT_ASSERT((
+               Assignable<typename Mutable_Container::value_type>));
+
+          BOOST_CONCEPT_ASSERT((InputIterator<iterator>));
+
+          i = c.begin();
+          i = c.end();
+          c.swap(c2);
+      }
+
+   private:
+      iterator i;
+      C c, c2;
+  };
+
+  BOOST_concept(ForwardContainer,(C))
+    : Container<C>
+  {
+      BOOST_CONCEPT_USAGE(ForwardContainer)
+      {
+          BOOST_CONCEPT_ASSERT((
+               ForwardIterator<
+                    typename ForwardContainer::const_iterator
+               >));
+      }
+  };
+
+  BOOST_concept(Mutable_ForwardContainer,(C))
+    : ForwardContainer<C>
+    , Mutable_Container<C>
+  {
+      BOOST_CONCEPT_USAGE(Mutable_ForwardContainer)
+      {
+          BOOST_CONCEPT_ASSERT((
+               Mutable_ForwardIterator<
+                   typename Mutable_ForwardContainer::iterator
+               >));
+      }
+  };
+
+  BOOST_concept(ReversibleContainer,(C))
+    : ForwardContainer<C>
+  {
+      typedef typename
+        C::const_reverse_iterator
+      const_reverse_iterator;
+
+      BOOST_CONCEPT_USAGE(ReversibleContainer)
+      {
+          BOOST_CONCEPT_ASSERT((
+              BidirectionalIterator<
+                  typename ReversibleContainer::const_iterator>));
+
+          BOOST_CONCEPT_ASSERT((BidirectionalIterator<const_reverse_iterator>));
+
+          const_constraints(c);
+      }
+   private:
+      void const_constraints(const C& cc)
+      {
+          const_reverse_iterator i = cc.rbegin();
+          i = cc.rend();
+      }
+      C c;
+  };
+
+  BOOST_concept(Mutable_ReversibleContainer,(C))
+    : Mutable_ForwardContainer<C>
+    , ReversibleContainer<C>
+  {
+      typedef typename C::reverse_iterator reverse_iterator;
+
+      BOOST_CONCEPT_USAGE(Mutable_ReversibleContainer)
+      {
+          typedef typename Mutable_ForwardContainer<C>::iterator iterator;
+          BOOST_CONCEPT_ASSERT((Mutable_BidirectionalIterator<iterator>));
+          BOOST_CONCEPT_ASSERT((Mutable_BidirectionalIterator<reverse_iterator>));
+
+          reverse_iterator i = c.rbegin();
+          i = c.rend();
+      }
+   private:
+      C c;
+  };
+
+  BOOST_concept(RandomAccessContainer,(C))
+    : ReversibleContainer<C>
+  {
+      typedef typename C::size_type size_type;
+      typedef typename C::const_reference const_reference;
+
+      BOOST_CONCEPT_USAGE(RandomAccessContainer)
+      {
+          BOOST_CONCEPT_ASSERT((
+              RandomAccessIterator<
+                  typename RandomAccessContainer::const_iterator
+              >));
+
+          const_constraints(c);
+      }
+   private:
+      void const_constraints(const C& cc)
+      {
+          const_reference r = cc[n];
+          ignore_unused_variable_warning(r);
+      }
+
+      C c;
+      size_type n;
+  };
+
+  BOOST_concept(Mutable_RandomAccessContainer,(C))
+    : Mutable_ReversibleContainer<C>
+    , RandomAccessContainer<C>
+  {
+   private:
+      typedef Mutable_RandomAccessContainer self;
+   public:
+      BOOST_CONCEPT_USAGE(Mutable_RandomAccessContainer)
+      {
+          BOOST_CONCEPT_ASSERT((Mutable_RandomAccessIterator<typename self::iterator>));
+          BOOST_CONCEPT_ASSERT((Mutable_RandomAccessIterator<typename self::reverse_iterator>));
+
+          typename self::reference r = c[i];
+          ignore_unused_variable_warning(r);
+      }
+
+   private:
+      typename Mutable_ReversibleContainer<C>::size_type i;
+      C c;
+  };
+
+  // A Sequence is inherently mutable
+  BOOST_concept(Sequence,(S))
+    : Mutable_ForwardContainer<S>
+      // Matt Austern's book puts DefaultConstructible here, the C++
+      // standard places it in Container --JGS
+      // ... so why aren't we following the standard?  --DWA
+    , DefaultConstructible<S>
+  {
+      BOOST_CONCEPT_USAGE(Sequence)
+      {
+          S
+              c(n),
+              c2(n, t),
+              c3(first, last);
+
+          c.insert(p, t);
+          c.insert(p, n, t);
+          c.insert(p, first, last);
+
+          c.erase(p);
+          c.erase(p, q);
+
+          typename Sequence::reference r = c.front();
+
+          ignore_unused_variable_warning(c);
+          ignore_unused_variable_warning(c2);
+          ignore_unused_variable_warning(c3);
+          ignore_unused_variable_warning(r);
+          const_constraints(c);
+      }
+   private:
+      void const_constraints(const S& c) {
+          typename Sequence::const_reference r = c.front();
+          ignore_unused_variable_warning(r);
+      }
+
+      typename S::value_type t;
+      typename S::size_type n;
+      typename S::value_type* first, *last;
+      typename S::iterator p, q;
+  };
+
+  BOOST_concept(FrontInsertionSequence,(S))
+    : Sequence<S>
+  {
+      BOOST_CONCEPT_USAGE(FrontInsertionSequence)
+      {
+          c.push_front(t);
+          c.pop_front();
+      }
+   private:
+      S c;
+      typename S::value_type t;
+  };
+
+  BOOST_concept(BackInsertionSequence,(S))
+    : Sequence<S>
+  {
+      BOOST_CONCEPT_USAGE(BackInsertionSequence)
+      {
+          c.push_back(t);
+          c.pop_back();
+          typename BackInsertionSequence::reference r = c.back();
+          ignore_unused_variable_warning(r);
+          const_constraints(c);
+      }
+   private:
+      void const_constraints(const S& cc) {
+          typename BackInsertionSequence::const_reference
+              r = cc.back();
+          ignore_unused_variable_warning(r);
+      };
+      S c;
+      typename S::value_type t;
+  };
+
+  BOOST_concept(AssociativeContainer,(C))
+    : ForwardContainer<C>
+    , DefaultConstructible<C>
+  {
+      typedef typename C::key_type key_type;
+      typedef typename C::key_compare key_compare;
+      typedef typename C::value_compare value_compare;
+      typedef typename C::iterator iterator;
+
+      BOOST_CONCEPT_USAGE(AssociativeContainer)
+      {
+          i = c.find(k);
+          r = c.equal_range(k);
+          c.erase(k);
+          c.erase(i);
+          c.erase(r.first, r.second);
+          const_constraints(c);
+          BOOST_CONCEPT_ASSERT((BinaryPredicate<key_compare,key_type,key_type>));
+
+          typedef typename AssociativeContainer::value_type value_type_;
+          BOOST_CONCEPT_ASSERT((BinaryPredicate<value_compare,value_type_,value_type_>));
+      }
+
+      // Redundant with the base concept, but it helps below.
+      typedef typename C::const_iterator const_iterator;
+   private:
+      void const_constraints(const C& cc)
+      {
+          ci = cc.find(k);
+          n = cc.count(k);
+          cr = cc.equal_range(k);
+      }
+
+      C c;
+      iterator i;
+      std::pair<iterator,iterator> r;
+      const_iterator ci;
+      std::pair<const_iterator,const_iterator> cr;
+      typename C::key_type k;
+      typename C::size_type n;
+  };
+
+  BOOST_concept(UniqueAssociativeContainer,(C))
+    : AssociativeContainer<C>
+  {
+      BOOST_CONCEPT_USAGE(UniqueAssociativeContainer)
+      {
+          C c(first, last);
+
+          pos_flag = c.insert(t);
+          c.insert(first, last);
+
+          ignore_unused_variable_warning(c);
+      }
+   private:
+      std::pair<typename C::iterator, bool> pos_flag;
+      typename C::value_type t;
+      typename C::value_type* first, *last;
+  };
+
+  BOOST_concept(MultipleAssociativeContainer,(C))
+    : AssociativeContainer<C>
+  {
+      BOOST_CONCEPT_USAGE(MultipleAssociativeContainer)
+      {
+          C c(first, last);
+
+          pos = c.insert(t);
+          c.insert(first, last);
+
+          ignore_unused_variable_warning(c);
+          ignore_unused_variable_warning(pos);
+      }
+   private:
+      typename C::iterator pos;
+      typename C::value_type t;
+      typename C::value_type* first, *last;
+  };
+
+  BOOST_concept(SimpleAssociativeContainer,(C))
+    : AssociativeContainer<C>
+  {
+      BOOST_CONCEPT_USAGE(SimpleAssociativeContainer)
+      {
+          typedef typename C::key_type key_type;
+          typedef typename C::value_type value_type;
+          BOOST_MPL_ASSERT((ndnboost::is_same<key_type,value_type>));
+      }
+  };
+
+  BOOST_concept(PairAssociativeContainer,(C))
+    : AssociativeContainer<C>
+  {
+      BOOST_CONCEPT_USAGE(PairAssociativeContainer)
+      {
+          typedef typename C::key_type key_type;
+          typedef typename C::value_type value_type;
+          typedef typename C::mapped_type mapped_type;
+          typedef std::pair<const key_type, mapped_type> required_value_type;
+          BOOST_MPL_ASSERT((ndnboost::is_same<value_type,required_value_type>));
+      }
+  };
+
+  BOOST_concept(SortedAssociativeContainer,(C))
+    : AssociativeContainer<C>
+    , ReversibleContainer<C>
+  {
+      BOOST_CONCEPT_USAGE(SortedAssociativeContainer)
+      {
+          C
+              c(kc),
+              c2(first, last),
+              c3(first, last, kc);
+
+          p = c.upper_bound(k);
+          p = c.lower_bound(k);
+          r = c.equal_range(k);
+
+          c.insert(p, t);
+
+          ignore_unused_variable_warning(c);
+          ignore_unused_variable_warning(c2);
+          ignore_unused_variable_warning(c3);
+          const_constraints(c);
+      }
+
+      void const_constraints(const C& c)
+      {
+          kc = c.key_comp();
+          vc = c.value_comp();
+
+          cp = c.upper_bound(k);
+          cp = c.lower_bound(k);
+          cr = c.equal_range(k);
+      }
+
+   private:
+      typename C::key_compare kc;
+      typename C::value_compare vc;
+      typename C::value_type t;
+      typename C::key_type k;
+      typedef typename C::iterator iterator;
+      typedef typename C::const_iterator const_iterator;
+
+      typedef SortedAssociativeContainer self;
+      iterator p;
+      const_iterator cp;
+      std::pair<typename self::iterator,typename self::iterator> r;
+      std::pair<typename self::const_iterator,typename self::const_iterator> cr;
+      typename C::value_type* first, *last;
+  };
+
+  // HashedAssociativeContainer
+
+  BOOST_concept(Collection,(C))
+  {
+      BOOST_CONCEPT_USAGE(Collection)
+      {
+        ndnboost::function_requires<ndnboost::InputIteratorConcept<iterator> >();
+        ndnboost::function_requires<ndnboost::InputIteratorConcept<const_iterator> >();
+        ndnboost::function_requires<ndnboost::CopyConstructibleConcept<value_type> >();
+        const_constraints(c);
+        i = c.begin();
+        i = c.end();
+        c.swap(c);
+      }
+
+      void const_constraints(const C& cc) {
+        ci = cc.begin();
+        ci = cc.end();
+        n = cc.size();
+        b = cc.empty();
+      }
+
+    private:
+      typedef typename C::value_type value_type;
+      typedef typename C::iterator iterator;
+      typedef typename C::const_iterator const_iterator;
+      typedef typename C::reference reference;
+      typedef typename C::const_reference const_reference;
+      // typedef typename C::pointer pointer;
+      typedef typename C::difference_type difference_type;
+      typedef typename C::size_type size_type;
+
+      C c;
+      bool b;
+      iterator i;
+      const_iterator ci;
+      size_type n;
+  };
+} // namespace ndnboost
+
+# include <ndnboost/concept/detail/concept_undef.hpp>
+
+#endif // BOOST_CONCEPT_CHECKS_HPP
+