comparison DEPENDENCIES/generic/include/boost/spirit/home/lex/meta_compiler.hpp @ 16:2665513ce2d3

Add boost headers

+//  Copyright (c) 2001-2011 Hartmut Kaiser
+//  Copyright (c) 2001-2011 Joel de Guzman
+// 
+//  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)
+
+#if !defined(BOOST_SPIRIT_LEX_META_COMPILER_APR_20_2009_0756PM)
+#define BOOST_SPIRIT_LEX_META_COMPILER_APR_20_2009_0756PM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/support/meta_compiler.hpp>
+#include <boost/spirit/home/lex/domain.hpp>
+#include <boost/spirit/home/lex/lexer_type.hpp>
+#include <boost/type_traits/remove_reference.hpp>
+#include <boost/utility/enable_if.hpp>
+
+namespace boost { namespace spirit
+{
+    template <typename T>
+    struct use_terminal<lex::domain, T
+      , typename enable_if<traits::is_lexer<T> >::type> // enables lexers
+      : mpl::true_ {};
+
+    namespace lex
+    {
+        template <typename T, typename Modifiers, typename Enable = void>
+        struct make_primitive // by default, return it as-is
+        {
+            typedef T result_type;
+
+            template <typename T_>
+            T_& operator()(T_& val, unused_type) const
+            {
+                return val;
+            }
+
+            template <typename T_>
+            T_ const& operator()(T_ const& val, unused_type) const
+            {
+                return val;
+            }
+        };
+
+        template <typename Tag, typename Elements
+          , typename Modifiers, typename Enable = void>
+        struct make_composite;
+    }
+
+    // Lex primitive meta-compiler
+    template <>
+    struct make_component<lex::domain, proto::tag::terminal>
+    {
+        template <typename Sig>
+        struct result;
+
+        template <typename This, typename Elements, typename Modifiers>
+        struct result<This(Elements, Modifiers)>
+        {
+            typedef typename lex::make_primitive<
+                typename remove_const<typename Elements::car_type>::type,
+                typename remove_reference<Modifiers>::type>::result_type
+            type;
+        };
+
+        template <typename Elements, typename Modifiers>
+        typename result<make_component(Elements, Modifiers)>::type
+        operator()(Elements const& elements, Modifiers const& modifiers) const
+        {
+            typedef typename remove_const<typename Elements::car_type>::type term;
+            return lex::make_primitive<term, Modifiers>()(elements.car, modifiers);
+        }
+    };
+
+    // Lex composite meta-compiler
+    template <typename Tag>
+    struct make_component<lex::domain, Tag>
+    {
+        template <typename Sig>
+        struct result;
+
+        template <typename This, typename Elements, typename Modifiers>
+        struct result<This(Elements, Modifiers)>
+        {
+            typedef typename
+                lex::make_composite<Tag, Elements
+                  , typename remove_reference<Modifiers>::type>::result_type
+            type;
+        };
+
+        template <typename Elements, typename Modifiers>
+        typename result<make_component(Elements, Modifiers)>::type
+        operator()(Elements const& elements, Modifiers const& modifiers) const
+        {
+            return lex::make_composite<Tag, Elements, Modifiers>()(
+                elements, modifiers);
+        }
+    };
+
+}}
+
+#endif