Remove iterator specialization (#59)

Author: andreiavrammsd

include/msd/blocking_iterator.hpp

@@ -28,6 +28,21 @@ class blocking_iterator {
      */
     using reference = const typename Channel::value_type&;
 
+    /**
+     * @brief Supporting single-pass reading of elements.
+     */
+    using iterator_category = std::input_iterator_tag;
+
+    /**
+     * @brief Signed integral type for iterator difference.
+     */
+    using difference_type = std::ptrdiff_t;
+
+    /**
+     * @brief Pointer type to the value_type.
+     */
+    using pointer = const value_type*;
+
     /**
      * @brief Constructs a blocking iterator from a channel reference.
      *
@@ -75,16 +90,4 @@ class blocking_iterator {
 
 }  // namespace msd
 
-/**
- * @brief Input iterator specialization
- */
-/// \cond
-template <typename T>
-struct std::iterator_traits<msd::blocking_iterator<T>> {
-    using value_type = typename msd::blocking_iterator<T>::value_type;
-    using reference = typename msd::blocking_iterator<T>::reference;
-    using iterator_category = std::input_iterator_tag;
-};
-/// \endcond
-
 #endif  // MSD_CHANNEL_BLOCKING_ITERATOR_HPP_