comparison DEPENDENCIES/generic/include/boost/spirit/home/qi/directive/repeat.hpp @ 16:2665513ce2d3

Add boost headers

+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 2001-2011 Hartmut Kaiser
+
+    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_REPEAT_NOVEMBER_14_2008_1148AM)
+#define SPIRIT_REPEAT_NOVEMBER_14_2008_1148AM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/qi/meta_compiler.hpp>
+#include <boost/spirit/home/qi/parser.hpp>
+#include <boost/spirit/home/qi/auxiliary/lazy.hpp>
+#include <boost/spirit/home/qi/operator/kleene.hpp>
+#include <boost/spirit/home/support/container.hpp>
+#include <boost/spirit/home/support/common_terminals.hpp>
+#include <boost/spirit/home/qi/detail/attributes.hpp>
+#include <boost/spirit/home/qi/detail/fail_function.hpp>
+#include <boost/spirit/home/qi/detail/pass_container.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/has_semantic_action.hpp>
+#include <boost/spirit/home/support/handles_container.hpp>
+#include <boost/fusion/include/at.hpp>
+#include <vector>
+
+namespace boost { namespace spirit
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <>
+    struct use_directive<qi::domain, tag::repeat>   // enables repeat[p]
+      : mpl::true_ {};
+
+    template <typename T>
+    struct use_directive<qi::domain
+      , terminal_ex<tag::repeat                     // enables repeat(exact)[p]
+        , fusion::vector1<T> >
+    > : mpl::true_ {};
+
+    template <typename T>
+    struct use_directive<qi::domain
+      , terminal_ex<tag::repeat                     // enables repeat(min, max)[p]
+        , fusion::vector2<T, T> >
+    > : mpl::true_ {};
+
+    template <typename T>
+    struct use_directive<qi::domain
+      , terminal_ex<tag::repeat                     // enables repeat(min, inf)[p]
+        , fusion::vector2<T, inf_type> >
+    > : mpl::true_ {};
+
+    template <>                                     // enables *lazy* repeat(exact)[p]
+    struct use_lazy_directive<
+        qi::domain
+      , tag::repeat
+      , 1 // arity
+    > : mpl::true_ {};
+
+    template <>                                     // enables *lazy* repeat(min, max)[p]
+    struct use_lazy_directive<                      // and repeat(min, inf)[p]
+        qi::domain
+      , tag::repeat
+      , 2 // arity
+    > : mpl::true_ {};
+}}
+
+namespace boost { namespace spirit { namespace qi
+{
+#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
+    using spirit::repeat;
+    using spirit::inf;
+#endif
+    using spirit::repeat_type;
+    using spirit::inf_type;
+
+    template <typename T>
+    struct exact_iterator // handles repeat(exact)[p]
+    {
+        exact_iterator(T const exact_)
+          : exact(exact_) {}
+
+        typedef T type;
+        T start() const { return 0; }
+        bool got_max(T i) const { return i >= exact; }
+        bool got_min(T i) const { return i >= exact; }
+
+        T const exact;
+
+    private:
+        // silence MSVC warning C4512: assignment operator could not be generated
+        exact_iterator& operator= (exact_iterator const&);
+    };
+
+    template <typename T>
+    struct finite_iterator // handles repeat(min, max)[p]
+    {
+        finite_iterator(T const min_, T const max_)
+          : min BOOST_PREVENT_MACRO_SUBSTITUTION (min_)
+          , max BOOST_PREVENT_MACRO_SUBSTITUTION (max_) {}
+
+        typedef T type;
+        T start() const { return 0; }
+        bool got_max(T i) const { return i >= max; }
+        bool got_min(T i) const { return i >= min; }
+
+        T const min;
+        T const max;
+
+    private:
+        // silence MSVC warning C4512: assignment operator could not be generated
+        finite_iterator& operator= (finite_iterator const&);
+    };
+
+    template <typename T>
+    struct infinite_iterator // handles repeat(min, inf)[p]
+    {
+        infinite_iterator(T const min_)
+          : min BOOST_PREVENT_MACRO_SUBSTITUTION (min_) {}
+
+        typedef T type;
+        T start() const { return 0; }
+        bool got_max(T /*i*/) const { return false; }
+        bool got_min(T i) const { return i >= min; }
+
+        T const min;
+
+    private:
+        // silence MSVC warning C4512: assignment operator could not be generated
+        infinite_iterator& operator= (infinite_iterator const&);
+    };
+
+    template <typename Subject, typename LoopIter>
+    struct repeat_parser : unary_parser<repeat_parser<Subject, LoopIter> >
+    {
+        typedef Subject subject_type;
+
+        template <typename Context, typename Iterator>
+        struct attribute
+        {
+            // Build a std::vector from the subject's attribute. Note
+            // that build_std_vector may return unused_type if the
+            // subject's attribute is an unused_type.
+            typedef typename
+                traits::build_std_vector<
+                    typename traits::attribute_of<
+                        Subject, Context, Iterator>::type
+                >::type
+            type;
+        };
+
+        repeat_parser(Subject const& subject_, LoopIter const& iter_)
+          : subject(subject_), iter(iter_) {}
+
+        template <typename F>
+        bool parse_container(F f) const
+        {
+            typename LoopIter::type i = iter.start();
+            for (/**/; !iter.got_min(i); ++i)
+            {
+                if (f (subject))
+                    return false;
+            }
+
+            // parse some more up to the maximum specified
+            typename F::iterator_type save = f.f.first;
+            for (/**/; !iter.got_max(i); ++i)
+            {
+                if (f (subject))
+                    break;
+                save = f.f.first;
+            }
+
+            f.f.first = save;
+            return true;
+        }
+
+        template <typename Iterator, typename Context
+          , typename Skipper, typename Attribute>
+        bool parse(Iterator& first, Iterator const& last
+          , Context& context, Skipper const& skipper
+          , Attribute& attr_) const
+        {
+            typedef detail::fail_function<Iterator, Context, Skipper>
+                fail_function;
+
+            // ensure the attribute is actually a container type
+            traits::make_container(attr_);
+
+            Iterator iter_local = first;
+            fail_function f(iter_local, last, context, skipper);
+            if (!parse_container(detail::make_pass_container(f, attr_)))
+                return false;
+
+            first = f.first;
+            return true;
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            return info("repeat", subject.what(context));
+        }
+
+        Subject subject;
+        LoopIter iter;
+
+    private:
+        // silence MSVC warning C4512: assignment operator could not be generated
+        repeat_parser& operator= (repeat_parser const&);
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Parser generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Modifiers>
+    struct make_directive<tag::repeat, Subject, Modifiers>
+    {
+        typedef kleene<Subject> result_type;
+        result_type operator()(unused_type, Subject const& subject, unused_type) const
+        {
+            return result_type(subject);
+        }
+    };
+
+    template <typename T, typename Subject, typename Modifiers>
+    struct make_directive<
+        terminal_ex<tag::repeat, fusion::vector1<T> >, Subject, Modifiers>
+    {
+        typedef exact_iterator<T> iterator_type;
+        typedef repeat_parser<Subject, iterator_type> result_type;
+
+        template <typename Terminal>
+        result_type operator()(
+            Terminal const& term, Subject const& subject, unused_type) const
+        {
+            return result_type(subject, fusion::at_c<0>(term.args));
+        }
+    };
+
+    template <typename T, typename Subject, typename Modifiers>
+    struct make_directive<
+        terminal_ex<tag::repeat, fusion::vector2<T, T> >, Subject, Modifiers>
+    {
+        typedef finite_iterator<T> iterator_type;
+        typedef repeat_parser<Subject, iterator_type> result_type;
+
+        template <typename Terminal>
+        result_type operator()(
+            Terminal const& term, Subject const& subject, unused_type) const
+        {
+            return result_type(subject,
+                iterator_type(
+                    fusion::at_c<0>(term.args)
+                  , fusion::at_c<1>(term.args)
+                )
+            );
+        }
+    };
+
+    template <typename T, typename Subject, typename Modifiers>
+    struct make_directive<
+        terminal_ex<tag::repeat
+        , fusion::vector2<T, inf_type> >, Subject, Modifiers>
+    {
+        typedef infinite_iterator<T> iterator_type;
+        typedef repeat_parser<Subject, iterator_type> result_type;
+
+        template <typename Terminal>
+        result_type operator()(
+            Terminal const& term, Subject const& subject, unused_type) const
+        {
+            return result_type(subject, fusion::at_c<0>(term.args));
+        }
+    };
+}}}
+
+namespace boost { namespace spirit { namespace traits
+{
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename LoopIter>
+    struct has_semantic_action<qi::repeat_parser<Subject, LoopIter> >
+      : unary_has_semantic_action<Subject> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename LoopIter, typename Attribute
+      , typename Context, typename Iterator>
+    struct handles_container<qi::repeat_parser<Subject, LoopIter>
+          , Attribute, Context, Iterator>
+      : mpl::true_ {};
+}}}
+
+#endif