Added boost header

test/external/boost/proto/detail/as_expr.hpp

@@ -0,0 +1,170 @@
+///////////////////////////////////////////////////////////////////////////////
+/// \file as_expr.hpp
+/// Contains definition of the as_expr\<\> and as_child\<\> helper class
+/// templates used to implement proto::domain's as_expr\<\> and as_child\<\>
+/// member templates.
+//
+//  Copyright 2010 Eric Niebler. 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_PROTO_DETAIL_AS_EXPR_HPP_EAN_06_09_2010
+#define BOOST_PROTO_DETAIL_AS_EXPR_HPP_EAN_06_09_2010
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include <boost/type_traits/remove_const.hpp>
+#include <boost/proto/proto_fwd.hpp>
+#include <boost/proto/args.hpp>
+
+namespace boost { namespace proto { namespace detail
+{
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename Generator>
+    struct base_generator
+    {
+        typedef Generator type;
+    };
+
+    template<typename Generator>
+    struct base_generator<use_basic_expr<Generator> >
+    {
+        typedef Generator type;
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator, bool WantsBasicExpr>
+    struct as_expr;
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator>
+    struct as_expr<T, Generator, false>
+    {
+        typedef typename term_traits<T &>::value_type value_type;
+        typedef proto::expr<proto::tag::terminal, term<value_type>, 0> expr_type;
+        typedef typename Generator::template result<Generator(expr_type)>::type result_type;
+
+        result_type operator()(T &t) const
+        {
+            return Generator()(expr_type::make(t));
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator>
+    struct as_expr<T, Generator, true>
+    {
+        typedef typename term_traits<T &>::value_type value_type;
+        typedef proto::basic_expr<proto::tag::terminal, term<value_type>, 0> expr_type;
+        typedef typename Generator::template result<Generator(expr_type)>::type result_type;
+
+        result_type operator()(T &t) const
+        {
+            return Generator()(expr_type::make(t));
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T>
+    struct as_expr<T, proto::default_generator, false>
+    {
+        typedef typename term_traits<T &>::value_type value_type;
+        typedef proto::expr<proto::tag::terminal, term<value_type>, 0> result_type;
+
+        result_type operator()(T &t) const
+        {
+            return result_type::make(t);
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T>
+    struct as_expr<T, proto::default_generator, true>
+    {
+        typedef typename term_traits<T &>::value_type value_type;
+        typedef proto::basic_expr<proto::tag::terminal, term<value_type>, 0> result_type;
+
+        result_type operator()(T &t) const
+        {
+            return result_type::make(t);
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator, bool WantsBasicExpr>
+    struct as_child;
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator>
+    struct as_child<T, Generator, false>
+    {
+    #if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
+        typedef typename term_traits<T &>::reference reference;
+    #else
+        typedef T &reference;
+    #endif
+        typedef proto::expr<proto::tag::terminal, term<reference>, 0> expr_type;
+        typedef typename Generator::template result<Generator(expr_type)>::type result_type;
+
+        result_type operator()(T &t) const
+        {
+            return Generator()(expr_type::make(t));
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T, typename Generator>
+    struct as_child<T, Generator, true>
+    {
+    #if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
+        typedef typename term_traits<T &>::reference reference;
+    #else
+        typedef T &reference;
+    #endif
+        typedef proto::basic_expr<proto::tag::terminal, term<reference>, 0> expr_type;
+        typedef typename Generator::template result<Generator(expr_type)>::type result_type;
+
+        result_type operator()(T &t) const
+        {
+            return Generator()(expr_type::make(t));
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T>
+    struct as_child<T, proto::default_generator, false>
+    {
+    #if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
+        typedef typename term_traits<T &>::reference reference;
+    #else
+        typedef T &reference;
+    #endif
+        typedef proto::expr<proto::tag::terminal, term<reference>, 0> result_type;
+
+        result_type operator()(T &t) const
+        {
+            return result_type::make(t);
+        }
+    };
+
+    ////////////////////////////////////////////////////////////////////////////////////////////////
+    template<typename T>
+    struct as_child<T, proto::default_generator, true>
+    {
+    #if BOOST_WORKAROUND(BOOST_MSVC, == 1310)
+        typedef typename term_traits<T &>::reference reference;
+    #else
+        typedef T &reference;
+    #endif
+        typedef proto::basic_expr<proto::tag::terminal, term<reference>, 0> result_type;
+
+        result_type operator()(T &t) const
+        {
+            return result_type::make(t);
+        }
+    };
+
+}}}
+
+#endif