1 files changed, 64 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/libs/thread/src/future.cpp b/src/third_party/boost-1.69.0/libs/thread/src/future.cpp
new file mode 100644
index 00000000000..a477e709ac2
--- /dev/null
+++ b/src/third_party/boost-1.69.0/libs/thread/src/future.cpp
@@ -0,0 +1,64 @@
+// (C) Copyright 2012 Vicente J. Botet Escriba
+// Use, modification and distribution are subject to 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)
+
+#include <boost/thread/detail/config.hpp>
+
+#ifndef BOOST_NO_EXCEPTIONS
+
+#include <boost/thread/futures/future_error_code.hpp>
+#include <string>
+
+namespace boost
+{
+
+  namespace thread_detail
+  {
+
+    class  future_error_category :
+      public boost::system::error_category
+    {
+    public:
+        virtual const char* name() const BOOST_NOEXCEPT;
+        virtual std::string message(int ev) const;
+    };
+
+    const char*
+    future_error_category::name() const BOOST_NOEXCEPT
+    {
+        return "future";
+    }
+
+    std::string
+    future_error_category::message(int ev) const
+    {
+        switch (BOOST_SCOPED_ENUM_NATIVE(future_errc)(ev))
+        {
+        case future_errc::broken_promise:
+            return std::string("The associated promise has been destructed prior "
+                          "to the associated state becoming ready.");
+        case future_errc::future_already_retrieved:
+            return std::string("The future has already been retrieved from "
+                          "the promise or packaged_task.");
+        case future_errc::promise_already_satisfied:
+            return std::string("The state of the promise has already been set.");
+        case future_errc::no_state:
+            return std::string("Operation not permitted on an object without "
+                          "an associated state.");
+        }
+        return std::string("unspecified future_errc value\n");
+    }
+    future_error_category future_error_category_var;
+  }
+
+  BOOST_THREAD_DECL
+  const system::error_category&
+  future_category() BOOST_NOEXCEPT
+  {
+      return thread_detail::future_error_category_var;
+  }
+
+}
+#endif
+