[Boost-commit] svn:boost r67058 - trunk/boost/spirit/home/qi/directive

Subject: [Boost-commit] svn:boost r67058 - trunk/boost/spirit/home/qi/directive
From: joel_at_[hidden]
Date: 2010-12-05 23:05:43

Author: djowel
Date: 2010-12-05 23:05:34 EST (Sun, 05 Dec 2010)
New Revision: 67058
URL: http://svn.boost.org/trac/boost/changeset/67058

Log:
correct as_string behavior
Added:
   trunk/boost/spirit/home/qi/directive/as_string.hpp   (contents, props changed)

Added: trunk/boost/spirit/home/qi/directive/as_string.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/spirit/home/qi/directive/as_string.hpp	2010-12-05 23:05:34 EST (Sun, 05 Dec 2010)
@@ -0,0 +1,118 @@
+/*=============================================================================
+    Copyright (c) 2001-2010 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(SPIRIT_AS_STRING_DECEMBER_6_2010_1013AM)
+#define SPIRIT_AS_STRING_DECEMBER_6_2010_1013AM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/qi/meta_compiler.hpp>
+#include <boost/spirit/home/qi/skip_over.hpp>
+#include <boost/spirit/home/qi/parser.hpp>
+#include <boost/spirit/home/qi/detail/assign_to.hpp>
+#include <boost/spirit/home/support/unused.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/common_terminals.hpp>
+#include <boost/spirit/home/support/unused.hpp>
+#include <boost/spirit/home/support/has_semantic_action.hpp>
+#include <boost/range/iterator_range.hpp>
+#include <string>
+
+namespace boost { namespace spirit
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <>
+    struct use_directive<qi::domain, tag::as_string> // enables as_string
+      : mpl::true_ {};
+
+    template <>
+    struct use_directive<qi::domain, tag::as_wstring> // enables as_wstring
+      : mpl::true_ {};
+}}
+
+namespace boost { namespace spirit { namespace qi
+{
+    using spirit::as_string;
+    using spirit::as_string_type;
+    using spirit::as_wstring;
+    using spirit::as_wstring_type;
+
+    template <typename Subject, typename Char>
+    struct as_string_directive : unary_parser<as_string_directive<Subject, Char> >
+    {
+        typedef Subject subject_type;
+        as_string_directive(Subject const& subject)
+          : subject(subject) {}
+
+        template <typename Context, typename Iterator>
+        struct attribute
+        {
+            typedef std::basic_string<Char> type;
+        };
+
+        template <typename Iterator, typename Context
+          , typename Skipper, typename Attribute>
+        bool parse(Iterator& first, Iterator const& last
+          , Context& context, Skipper const& skipper, Attribute& attr) const
+        {
+            qi::skip_over(first, last, skipper);
+            Iterator i = first;
+            std::basic_string<Char> str_attr;
+            if (subject.parse(i, last, context, skipper, str_attr))
+            {
+                spirit::traits::assign_to(str_attr, attr);
+                first = i;
+                return true;
+            }
+            return false;
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            return info("as_string", subject.what(context));
+
+        }
+
+        Subject subject;
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Parser generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Modifiers>
+    struct make_directive<tag::as_string, Subject, Modifiers>
+    {
+        typedef as_string_directive<Subject, char> result_type;
+        result_type operator()(unused_type, Subject const& subject, unused_type) const
+        {
+            return result_type(subject);
+        }
+    };
+
+    template <typename Subject, typename Modifiers>
+    struct make_directive<tag::as_wstring, Subject, Modifiers>
+    {
+        typedef as_string_directive<Subject, wchar_t> result_type;
+        result_type operator()(unused_type, Subject const& subject, unused_type) const
+        {
+            return result_type(subject);
+        }
+    };
+}}}
+
+namespace boost { namespace spirit { namespace traits
+{
+    template <typename Subject, typename Char>
+    struct has_semantic_action<qi::as_string_directive<Subject, Char> >
+      : unary_has_semantic_action<Subject> {};
+}}}
+
+#endif