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diff --git a/src/third_party/boost-1.56.0/boost/parameter/aux_/default.hpp b/src/third_party/boost-1.56.0/boost/parameter/aux_/default.hpp
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--- a/src/third_party/boost-1.56.0/boost/parameter/aux_/default.hpp
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@@ -1,69 +0,0 @@
-// 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
-// http://www.boost.org/LICENSE_1_0.txt)
-
-#ifndef 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 <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
-
-}}} // namespace boost::parameter::aux
-
-#endif // DEFAULT_050329_HPP
-