Added thirdparty: boost library

thirdparty/include/boost/parameter/aux_/default.hpp

@@ -0,0 +1,111 @@
+// Copyright Daniel Wallin, David Abrahams 2005.
+// Copyright Cromwell D. Enage 2017.
+// 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 BOOST_PARAMETER_AUX_DEFAULT_HPP
+#define BOOST_PARAMETER_AUX_DEFAULT_HPP
+
+namespace boost { namespace parameter { namespace aux {
+
+    // A wrapper for the default value passed by the user when resolving
+    // the value of the parameter with the given Keyword
+    template <typename Keyword, typename Value>
+    struct default_
+    {
+        inline BOOST_CONSTEXPR default_(Value& x) : value(x)
+        {
+        }
+
+        Value& value;
+    };
+}}} // namespace boost::parameter::aux
+
+#include <boost/parameter/config.hpp>
+
+namespace boost { namespace parameter { namespace aux {
+
+    // lazy_default -- A wrapper for the default value computation function
+    // passed by the user when resolving the value of the parameter with the
+    // given keyword.
+#if BOOST_WORKAROUND(__EDG_VERSION__, <= 300)
+    // These compilers need a little extra help with overload resolution;
+    // we have empty_arg_list's operator[] accept a base class
+    // to make that overload less preferable.
+    template <typename KW, typename DefaultComputer>
+    struct lazy_default_base
+    {
+        inline BOOST_CONSTEXPR lazy_default_base(DefaultComputer& x)
+          : compute_default(x)
+        {
+        }
+
+        DefaultComputer& compute_default;
+    };
+
+    template <typename KW, typename DefaultComputer>
+    struct lazy_default
+      : ::boost::parameter::aux::lazy_default_base<KW,DefaultComputer>
+    {
+        inline BOOST_CONSTEXPR lazy_default(DefaultComputer& x)
+          : ::boost::parameter::aux::lazy_default_base<KW,DefaultComputer>(x)
+        {
+        }
+    };
+#else   // !BOOST_WORKAROUND(__EDG_VERSION__, <= 300)
+    template <typename KW, typename DefaultComputer>
+    struct lazy_default
+    {
+        inline BOOST_CONSTEXPR lazy_default(DefaultComputer& x)
+          : compute_default(x)
+        {
+        }
+
+        DefaultComputer& compute_default;
+    };
+#endif  // EDG workarounds needed.
+}}} // namespace boost::parameter::aux
+
+#if BOOST_WORKAROUND(__EDG_VERSION__, <= 300)
+#define BOOST_PARAMETER_lazy_default_fallback \
+    ::boost::parameter::aux::lazy_default_base
+/**/
+#else
+#define BOOST_PARAMETER_lazy_default_fallback \
+    ::boost::parameter::aux::lazy_default
+/**/
+#endif
+
+#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
+
+#include <utility>
+
+namespace boost { namespace parameter { namespace aux {
+
+    template <typename Keyword, typename Value>
+    struct default_r_
+    {
+        inline BOOST_CONSTEXPR default_r_(Value&& x)
+          : value(::std::forward<Value>(x))
+        {
+        }
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1910)
+        // MSVC 2015 miscompiles moves for classes containing rvalue ref members
+        // using the default generated move constructor
+        // when moving into a function
+        // https://github.com/boostorg/parameter/pull/109
+        inline BOOST_CONSTEXPR default_r_(default_r_&& x)
+          : value(::std::forward<Value>(x.value))
+        {
+        }
+#endif
+
+        Value&& value;
+    };
+}}} // namespace boost::parameter::aux
+
+#endif  // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
+#endif  // include guard
+