Update to boost 1.72

[lyx.git] / 3rdparty / boost / boost / parameter / aux_ / default.hpp

diff --git a/3rdparty/boost/boost/parameter/aux_/default.hpp b/3rdparty/boost/boost/parameter/aux_/default.hpp
index 604da61299633b2fce6d82606f6d0c386cfc920c..531111c3e8fe0cb1d2064f6e431f652fa964b758 100644 (file)
--- a/3rdparty/boost/boost/parameter/aux_/default.hpp
+++ b/3rdparty/boost/boost/parameter/aux_/default.hpp
@@ -1,69 +1,100 @@
-// Copyright Daniel Wallin, David Abrahams 2005. Use, modification and
-// distribution is subject to the Boost Software License, Version 1.0. (See
-// accompanying file LICENSE_1_0.txt or copy at
+// 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 DEFAULT_050329_HPP
-# define DEFAULT_050329_HPP
+#define DEFAULT_050329_HPP
 
-# include <boost/detail/workaround.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 {
 
-// A wrapper for the default value passed by the user when resolving
-// the value of the parameter with the given Keyword
-template <class Keyword, class Value>
-struct default_
-{
-    default_(Value& x)
-      : value(x)
-    {}
-
-    Value& value;
-};
-
-//
-// 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 <class KW, class DefaultComputer>
-struct lazy_default_base
-{
-    lazy_default_base(DefaultComputer const& x)
-      : compute_default(x)
-    {}
-    DefaultComputer const& compute_default;
-};
-
-template <class KW, class DefaultComputer>
-struct lazy_default
-  : lazy_default_base<KW,DefaultComputer>
-  {
-      lazy_default(DefaultComputer const & x)
-        : lazy_default_base<KW,DefaultComputer>(x)
-      {}
-  };
-#  define BOOST_PARAMETER_lazy_default_fallback lazy_default_base
-# else 
-template <class KW, class DefaultComputer>
-struct lazy_default
-{
-    lazy_default(const DefaultComputer& x)
-      : compute_default(x)
-    {}
-    DefaultComputer const& compute_default;
-};
-#  define BOOST_PARAMETER_lazy_default_fallback lazy_default
-# endif 
+    template <typename Keyword, typename Value>
+    struct default_r_
+    {
+        inline BOOST_CONSTEXPR default_r_(Value&& x)
+          : value(::std::forward<Value>(x))
+        {
+        }
 
+        Value&& value;
+    };
 }}} // namespace boost::parameter::aux
 
-#endif // DEFAULT_050329_HPP
+#endif  // BOOST_PARAMETER_HAS_PERFECT_FORWARDING
+#endif  // include guard