Squashed 'OpenVPN Adapter/Vendors/asio/' content from commit 524288c

git-subtree-dir: OpenVPN Adapter/Vendors/asio
git-subtree-split: 524288cb4fcf84664b3dc39cb4424c7509969b92

asio/src/doc/requirements/IteratorConnectHandler.qbk

@@ -0,0 +1,81 @@
+[/
+ / Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff 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)
+ /]
+
+[section:IteratorConnectHandler Iterator connect handler requirements]
+
+An iterator connect handler must meet the requirements for a [link
+asio.reference.Handler handler]. A value `h` of an iterator connect handler
+class should work correctly in the expression `h(ec, i)`, where `ec` is an
+lvalue of type `const error_code` and `i` is an lvalue of the type `Iterator`
+used in the corresponding `connect()` or async_connect()` function.
+
+[heading Examples]
+
+A free function as an iterator connect handler:
+
+  void connect_handler(
+      const asio::error_code& ec,
+      asio::ip::tcp::resolver::iterator iterator)
+  {
+    ...
+  }
+
+An iterator connect handler function object:
+
+  struct connect_handler
+  {
+    ...
+    template <typename Iterator>
+    void operator()(
+        const asio::error_code& ec,
+        Iterator iterator)
+    {
+      ...
+    }
+    ...
+  };
+
+A lambda as an iterator connect handler:
+
+  asio::async_connect(...,
+      [](const asio::error_code& ec,
+        asio::ip::tcp::resolver::iterator iterator)
+      {
+        ...
+      });
+
+A non-static class member function adapted to an iterator connect handler using
+`std::bind()`:
+
+  void my_class::connect_handler(
+      const asio::error_code& ec,
+      asio::ip::tcp::resolver::iterator iterator)
+  {
+    ...
+  }
+  ...
+  asio::async_connect(...,
+      std::bind(&my_class::connect_handler,
+        this, std::placeholders::_1,
+        std::placeholders::_2));
+
+A non-static class member function adapted to an iterator connect handler using
+`boost::bind()`:
+
+  void my_class::connect_handler(
+      const asio::error_code& ec,
+      asio::ip::tcp::resolver::iterator iterator)
+  {
+    ...
+  }
+  ...
+  asio::async_connect(...,
+      boost::bind(&my_class::connect_handler,
+        this, asio::placeholders::error,
+        asio::placeholders::iterator));
+
+[endsect]