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

Add boost headers

+/*=============================================================================
+    Copyright (c) 2001-2011 Joel de Guzman
+    Copyright (c) 2011      Bryce Lelbach
+
+    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_REAL_APRIL_18_2006_0850AM)
+#define BOOST_SPIRIT_REAL_APRIL_18_2006_0850AM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/qi/skip_over.hpp>
+#include <boost/spirit/home/qi/detail/enable_lit.hpp>
+#include <boost/spirit/home/qi/meta_compiler.hpp>
+#include <boost/spirit/home/qi/parser.hpp>
+#include <boost/spirit/home/qi/numeric/real_policies.hpp>
+#include <boost/spirit/home/qi/numeric/numeric_utils.hpp>
+#include <boost/spirit/home/qi/numeric/detail/real_impl.hpp>
+#include <boost/spirit/home/support/common_terminals.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost { namespace spirit
+{
+    namespace qi
+    {
+        ///////////////////////////////////////////////////////////////////////
+        // forward declaration only
+        template <typename T>
+        struct real_policies;
+
+        ///////////////////////////////////////////////////////////////////////
+        // This is the class that the user can instantiate directly in
+        // order to create a customized real parser
+        template <typename T = double, typename Policies = real_policies<T> >
+        struct real_parser
+          : spirit::terminal<tag::stateful_tag<Policies, tag::double_, T> >
+        {
+            typedef tag::stateful_tag<Policies, tag::double_, T> tag_type;
+
+            real_parser() {}
+            real_parser(Policies const& p)
+              : spirit::terminal<tag_type>(p) {}
+        };
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <> // enables float_
+    struct use_terminal<qi::domain, tag::float_>
+      : mpl::true_ {};
+
+    template <> // enables double_
+    struct use_terminal<qi::domain, tag::double_>
+      : mpl::true_ {};
+
+    template <> // enables long_double
+    struct use_terminal<qi::domain, tag::long_double>
+      : mpl::true_ {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename A0> // enables lit(n)
+    struct use_terminal<qi::domain
+        , terminal_ex<tag::lit, fusion::vector1<A0> >
+        , typename enable_if<is_same<A0, float> >::type>
+      : mpl::true_ {};
+
+    template <typename A0> // enables lit(n)
+    struct use_terminal<qi::domain
+        , terminal_ex<tag::lit, fusion::vector1<A0> >
+        , typename enable_if<is_same<A0, double> >::type>
+      : mpl::true_ {};
+
+    template <typename A0> // enables lit(n)
+    struct use_terminal<qi::domain
+        , terminal_ex<tag::lit, fusion::vector1<A0> >
+        , typename enable_if<is_same<A0, long double> >::type>
+      : mpl::true_ {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename A0> // enables float_(...)
+    struct use_terminal<qi::domain
+      , terminal_ex<tag::float_, fusion::vector1<A0> >
+    > : mpl::true_ {};
+
+    template <typename A0> // enables double_(...)
+    struct use_terminal<qi::domain
+      , terminal_ex<tag::double_, fusion::vector1<A0> >
+    > : mpl::true_ {};
+
+    template <typename A0> // enables long_double(...)
+    struct use_terminal<qi::domain
+      , terminal_ex<tag::long_double, fusion::vector1<A0> >
+    > : mpl::true_ {};
+
+    template <> // enables *lazy* float_(...)
+    struct use_lazy_terminal<qi::domain, tag::float_, 1>
+      : mpl::true_ {};
+
+    template <> // enables *lazy* double_(...)
+    struct use_lazy_terminal<qi::domain, tag::double_, 1>
+      : mpl::true_ {};
+
+    template <> // enables *lazy* long_double_(...)
+    struct use_lazy_terminal<qi::domain, tag::long_double, 1>
+      : mpl::true_ {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    // enables custom real_parser
+    template <typename T, typename Policies>
+    struct use_terminal<qi::domain
+        , tag::stateful_tag<Policies, tag::double_, T> >
+      : mpl::true_ {};
+
+    // enables custom real_parser(...)
+    template <typename T, typename Policies, typename A0>
+    struct use_terminal<qi::domain
+        , terminal_ex<tag::stateful_tag<Policies, tag::double_, T>
+        , fusion::vector1<A0> > >
+      : mpl::true_ {};
+
+    // enables *lazy* custom real_parser(...)
+    template <typename T, typename Policies>
+    struct use_lazy_terminal<
+        qi::domain
+      , tag::stateful_tag<Policies, tag::double_, T>
+      , 1 // arity
+    > : mpl::true_ {};
+}}
+
+namespace boost { namespace spirit { namespace qi
+{
+#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
+    using spirit::float_;
+    using spirit::double_;
+    using spirit::long_double;
+    using spirit::lit; // lit(1.0) is equivalent to 1.0
+#endif
+
+    using spirit::float_type;
+    using spirit::double_type;
+    using spirit::long_double_type;
+    using spirit::lit_type;
+
+    ///////////////////////////////////////////////////////////////////////////
+    // This is the actual real number parser
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T, typename RealPolicies = real_policies<T> >
+    struct any_real_parser
+      : primitive_parser<any_real_parser<T, RealPolicies> >
+    {
+        template <typename Context, typename Iterator>
+        struct attribute
+        {
+            typedef T type;
+        };
+
+        template <typename Iterator, typename Context, typename Skipper>
+        bool parse(Iterator& first, Iterator const& last
+          , Context& /*context*/, Skipper const& skipper
+          , T& attr_) const
+        {
+            typedef detail::real_impl<T, RealPolicies> extract;
+            qi::skip_over(first, last, skipper);
+            return extract::parse(first, last, attr_, RealPolicies());
+        }
+
+        template <typename Iterator, typename Context
+          , typename Skipper, typename Attribute>
+        bool parse(Iterator& first, Iterator const& last
+          , Context& context, Skipper const& skipper
+          , Attribute& attr_param) const
+        {
+            // this case is called when Attribute is not T
+            T attr_;
+            if (parse(first, last, context, skipper, attr_))
+            {
+                traits::assign_to(attr_, attr_param);
+                return true;
+            }
+            return false;
+        }
+
+        template <typename Context>
+        info what(Context& /*context*/) const
+        {
+            return info("real");
+        }
+    };
+
+    template <typename T, typename RealPolicies = real_policies<T>
+            , bool no_attribute = true>
+    struct literal_real_parser
+      : primitive_parser<literal_real_parser<T, RealPolicies, no_attribute> >
+    {
+        template <typename Value>
+        literal_real_parser(Value const& n) : n_(n) {}
+
+        template <typename Context, typename Iterator>
+        struct attribute
+          : mpl::if_c<no_attribute, unused_type, T>
+        {};
+
+        template <typename Iterator, typename Context
+          , typename Skipper, typename Attribute>
+        bool parse(Iterator& first, Iterator const& last
+          , Context& context, Skipper const& skipper
+          , Attribute& attr_param) const
+        {
+            typedef detail::real_impl<T, RealPolicies> extract;
+            qi::skip_over(first, last, skipper);
+
+            Iterator save = first;
+            T attr_;
+
+            if (extract::parse(first, last, attr_, RealPolicies()) &&
+                (attr_ == n_))
+            {
+                traits::assign_to(attr_, attr_param);
+                return true;
+            }
+
+            first = save;
+            return false;
+        }
+
+        template <typename Context>
+        info what(Context& /*context*/) const
+        {
+            return info("real");
+        }
+
+        T n_;
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Parser generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T, typename Policies = real_policies<T> >
+    struct make_real
+    {
+        typedef any_real_parser<T, Policies> result_type;
+
+        result_type operator()(unused_type, unused_type) const
+        {
+            return result_type();
+        }
+    };
+
+    template <typename T, typename Policies = real_policies<T> >
+    struct make_direct_real
+    {
+        typedef literal_real_parser<T, Policies, false> result_type;
+
+        template <typename Terminal>
+        result_type operator()(Terminal const& term, unused_type) const
+        {
+            return result_type(T(fusion::at_c<0>(term.args)));
+        }
+    };
+
+    template <typename T, typename Policies = real_policies<T> >
+    struct make_literal_real
+    {
+        typedef literal_real_parser<T, Policies> result_type;
+
+        template <typename Terminal>
+        result_type operator()(Terminal const& term, unused_type) const
+        {
+            return result_type(fusion::at_c<0>(term.args));
+        }
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+          terminal_ex<tag::lit, fusion::vector1<A0> >
+        , Modifiers, typename enable_if<is_same<A0, float> >::type>
+      : make_literal_real<float> {};
+
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+          terminal_ex<tag::lit, fusion::vector1<A0> >
+        , Modifiers, typename enable_if<is_same<A0, double> >::type>
+      : make_literal_real<double> {};
+
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+          terminal_ex<tag::lit, fusion::vector1<A0> >
+        , Modifiers, typename enable_if<is_same<A0, long double> >::type>
+      : make_literal_real<long double> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T, typename Policies, typename Modifiers>
+    struct make_primitive<
+        tag::stateful_tag<Policies, tag::double_, T>, Modifiers>
+      : make_real<T, Policies> {};
+
+    template <typename T, typename Policies, typename A0, typename Modifiers>
+    struct make_primitive<
+        terminal_ex<tag::stateful_tag<Policies, tag::double_, T>
+      , fusion::vector1<A0> >, Modifiers>
+      : make_direct_real<T, Policies> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Modifiers>
+    struct make_primitive<tag::float_, Modifiers>
+      : make_real<float> {};
+
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+        terminal_ex<tag::float_
+      , fusion::vector1<A0> >, Modifiers>
+      : make_direct_real<float> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Modifiers>
+    struct make_primitive<tag::double_, Modifiers>
+      : make_real<double> {};
+
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+        terminal_ex<tag::double_
+      , fusion::vector1<A0> >, Modifiers>
+      : make_direct_real<double> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Modifiers>
+    struct make_primitive<tag::long_double, Modifiers>
+      : make_real<long double> {};
+
+    template <typename Modifiers, typename A0>
+    struct make_primitive<
+        terminal_ex<tag::long_double
+      , fusion::vector1<A0> >, Modifiers>
+      : make_direct_real<long double> {};
+}}}
+
+#endif