Parser concept, fixes:

A new concept Parser is introduced with routines to read from a stream
into the parser. This solves a problem with the old read interface where
messages must be default constructible and move assignable.

Parser fixes:

* Fix detect invalid reason-phrase octets
* Fix write_eof to set the 'complete' state on success
* Fix consider parse complete if eof received on empty body

WebSocket:

* Increase coverage

test/core/buffer_test.hpp

@@ -0,0 +1,89 @@
+//
+// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail dot com)
+//
+// 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)
+//
+
+#ifndef BEAST_TEST_BUFFER_TEST_HPP
+#define BEAST_TEST_BUFFER_TEST_HPP
+
+#include <beast/core/buffer_concepts.hpp>
+#include <boost/asio/buffer.hpp>
+#include <algorithm>
+#include <type_traits>
+
+namespace beast {
+namespace test {
+
+template<class ConstBufferSequence>
+typename std::enable_if<
+    is_ConstBufferSequence<ConstBufferSequence>::value,
+        std::size_t>::type
+buffer_count(ConstBufferSequence const& buffers)
+{
+    return std::distance(buffers.begin(), buffers.end());
+}
+
+template<class ConstBufferSequence>
+typename std::enable_if<
+    is_ConstBufferSequence<ConstBufferSequence>::value,
+        std::size_t>::type
+size_pre(ConstBufferSequence const& buffers)
+{
+    std::size_t n = 0;
+    for(auto it = buffers.begin(); it != buffers.end(); ++it)
+    {
+        typename ConstBufferSequence::const_iterator it0(std::move(it));
+        typename ConstBufferSequence::const_iterator it1(it0);
+        typename ConstBufferSequence::const_iterator it2;
+        it2 = it1;
+        n += boost::asio::buffer_size(*it2);
+        it = std::move(it2);
+    }
+    return n;
+}
+
+template<class ConstBufferSequence>
+typename std::enable_if<
+    is_ConstBufferSequence<ConstBufferSequence>::value,
+        std::size_t>::type
+size_post(ConstBufferSequence const& buffers)
+{
+    std::size_t n = 0;
+    for(auto it = buffers.begin(); it != buffers.end(); it++)
+        n += boost::asio::buffer_size(*it);
+    return n;
+}
+
+template<class ConstBufferSequence>
+typename std::enable_if<
+    is_ConstBufferSequence<ConstBufferSequence>::value,
+        std::size_t>::type
+size_rev_pre(ConstBufferSequence const& buffers)
+{
+    std::size_t n = 0;
+    for(auto it = buffers.end(); it != buffers.begin();)
+        n += boost::asio::buffer_size(*--it);
+    return n;
+}
+
+template<class ConstBufferSequence>
+typename std::enable_if<
+    is_ConstBufferSequence<ConstBufferSequence>::value,
+        std::size_t>::type
+size_rev_post(ConstBufferSequence const& buffers)
+{
+    std::size_t n = 0;
+    for(auto it = buffers.end(); it != buffers.begin();)
+    {
+        it--;
+        n += boost::asio::buffer_size(*it);
+    }
+    return n;
+}
+
+} // test
+} // beast
+
+#endif