| // Copyright (c) 2001-2010 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(BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM) |
| #define BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/config/no_tr1/cmath.hpp> |
| #include <boost/spirit/home/support/common_terminals.hpp> |
| #include <boost/spirit/home/support/string_traits.hpp> |
| #include <boost/spirit/home/support/info.hpp> |
| #include <boost/spirit/home/support/char_class.hpp> |
| #include <boost/spirit/home/support/container.hpp> |
| #include <boost/spirit/home/support/detail/get_encoding.hpp> |
| #include <boost/spirit/home/karma/meta_compiler.hpp> |
| #include <boost/spirit/home/karma/char.hpp> |
| #include <boost/spirit/home/karma/delimit_out.hpp> |
| #include <boost/spirit/home/karma/auxiliary/lazy.hpp> |
| #include <boost/spirit/home/karma/detail/get_casetag.hpp> |
| #include <boost/spirit/home/karma/detail/extract_from.hpp> |
| #include <boost/spirit/home/karma/domain.hpp> |
| #include <boost/spirit/home/karma/numeric/real_policies.hpp> |
| #include <boost/spirit/home/karma/numeric/detail/real_utils.hpp> |
| #include <boost/fusion/include/at.hpp> |
| #include <boost/fusion/include/value_at.hpp> |
| #include <boost/fusion/include/vector.hpp> |
| |
| namespace boost { namespace spirit |
| { |
| namespace karma |
| { |
| /////////////////////////////////////////////////////////////////////// |
| // forward declaration only |
| template <typename T> |
| struct real_policies; |
| |
| /////////////////////////////////////////////////////////////////////// |
| // This one is the class that the user can instantiate directly in |
| // order to create a customized real generator |
| template <typename T = double, typename Policies = real_policies<T> > |
| struct real_generator |
| : spirit::terminal<tag::stateful_tag<Policies, tag::double_, T> > |
| { |
| typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
| |
| real_generator() {} |
| real_generator(Policies const& p) |
| : spirit::terminal<tag_type>(p) {} |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Enablers |
| /////////////////////////////////////////////////////////////////////////// |
| template <> |
| struct use_terminal<karma::domain, tag::float_> // enables float_ |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, tag::double_> // enables double_ |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, tag::long_double> // enables long_double |
| : mpl::true_ {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <> |
| struct use_terminal<karma::domain, float> // enables lit(1.of) |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, double> // enables lit(1.0) |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, long double> // enables lit(1.0l) |
| : mpl::true_ {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename A0> |
| struct use_terminal<karma::domain // enables float_(...) |
| , terminal_ex<tag::float_, fusion::vector1<A0> > |
| > : mpl::true_ {}; |
| |
| template <typename A0> |
| struct use_terminal<karma::domain // enables double_(...) |
| , terminal_ex<tag::double_, fusion::vector1<A0> > |
| > : mpl::true_ {}; |
| |
| template <typename A0> |
| struct use_terminal<karma::domain // enables long_double(...) |
| , terminal_ex<tag::long_double, fusion::vector1<A0> > |
| > : mpl::true_ {}; |
| |
| // lazy float_(...), double_(...), long_double(...) |
| template <> |
| struct use_lazy_terminal<karma::domain, tag::float_, 1> |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_lazy_terminal<karma::domain, tag::double_, 1> |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_lazy_terminal<karma::domain, tag::long_double, 1> |
| : mpl::true_ {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // enables custom real generator |
| template <typename T, typename Policies> |
| struct use_terminal<karma::domain |
| , tag::stateful_tag<Policies, tag::double_, T> > |
| : mpl::true_ {}; |
| |
| template <typename T, typename Policies, typename A0> |
| struct use_terminal<karma::domain |
| , terminal_ex<tag::stateful_tag<Policies, tag::double_, T> |
| , fusion::vector1<A0> > > |
| : mpl::true_ {}; |
| |
| // enables *lazy* custom real generator |
| template <typename T, typename Policies> |
| struct use_lazy_terminal< |
| karma::domain |
| , tag::stateful_tag<Policies, tag::double_, T> |
| , 1 // arity |
| > : mpl::true_ {}; |
| |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace karma |
| { |
| using spirit::float_; |
| using spirit::float__type; |
| using spirit::double_; |
| using spirit::double__type; |
| using spirit::long_double; |
| using spirit::long_double_type; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // This specialization is used for real generators not having a direct |
| // initializer: float_, double_ etc. These generators must be used in |
| // conjunction with an attribute. |
| /////////////////////////////////////////////////////////////////////////// |
| template < |
| typename T, typename Policies, typename CharEncoding, typename Tag> |
| struct any_real_generator |
| : primitive_generator<any_real_generator<T, Policies, CharEncoding, Tag> > |
| { |
| typedef typename Policies::properties properties; |
| |
| template <typename Context, typename Unused> |
| struct attribute |
| { |
| typedef T type; |
| }; |
| |
| any_real_generator(Policies const& policies = Policies()) |
| : p_(policies) {} |
| |
| // double_/float_/etc. has an attached attribute |
| template <typename OutputIterator, typename Context, typename Delimiter |
| , typename Attribute> |
| bool generate(OutputIterator& sink, Context& context |
| , Delimiter const& d, Attribute const& attr) const |
| { |
| if (!traits::has_optional_value(attr)) |
| return false; // fail if it's an uninitialized optional |
| |
| typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
| return inserter_type::call(sink, traits::extract_from<T>(attr, context), p_) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| // this double_/float_/etc. has no attribute attached, it needs to have |
| // been initialized from a direct literal |
| template <typename OutputIterator, typename Context, typename Delimiter> |
| static bool generate(OutputIterator&, Context&, Delimiter const& |
| , unused_type) |
| { |
| // It is not possible (doesn't make sense) to use numeric generators |
| // without providing any attribute, as the generator doesn't 'know' |
| // what to output. The following assertion fires if this situation |
| // is detected in your code. |
| BOOST_SPIRIT_ASSERT_MSG(false, real_not_usable_without_attribute, ()); return false; |
| } |
| |
| template <typename Context> |
| static info what(Context const& /*context*/) |
| { |
| return info("real"); |
| } |
| |
| Policies p_; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // This specialization is used for real generators having a direct |
| // initializer: float_(10.), double_(20.) etc. |
| /////////////////////////////////////////////////////////////////////////// |
| template < |
| typename T, typename Policies, typename CharEncoding, typename Tag |
| , bool no_attribute> |
| struct literal_real_generator |
| : primitive_generator<literal_real_generator<T, Policies, CharEncoding |
| , Tag, no_attribute> > |
| { |
| typedef typename Policies::properties properties; |
| |
| template <typename Context, typename Unused = unused_type> |
| struct attribute |
| : mpl::if_c<no_attribute, unused_type, T> |
| {}; |
| |
| literal_real_generator(typename add_const<T>::type n |
| , Policies const& policies = Policies()) |
| : n_(n), p_(policies) {} |
| |
| // A double_(1.0) which additionally has an associated attribute emits |
| // its immediate literal only if it matches the attribute, otherwise |
| // it fails. |
| template <typename OutputIterator, typename Context, typename Delimiter |
| , typename Attribute> |
| bool generate(OutputIterator& sink, Context& context |
| , Delimiter const& d, Attribute const& attr) const |
| { |
| typedef typename attribute<Context>::type attribute_type; |
| if (!traits::has_optional_value(attr) || |
| n_ != traits::extract_from<attribute_type>(attr, context)) |
| { |
| return false; |
| } |
| |
| typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
| return inserter_type::call(sink, n_, p_) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| // A double_(1.0) without any associated attribute just emits its |
| // immediate literal |
| template <typename OutputIterator, typename Context, typename Delimiter> |
| bool generate(OutputIterator& sink, Context&, Delimiter const& d |
| , unused_type) const |
| { |
| typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
| return inserter_type::call(sink, n_, p_) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| template <typename Context> |
| static info what(Context const& /*context*/) |
| { |
| return info("real"); |
| } |
| |
| T n_; |
| Policies p_; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Generator generators: make_xxx function (objects) |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename T, typename Modifiers |
| , typename Policies = real_policies<T> > |
| struct make_real |
| { |
| static bool const lower = |
| has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
| static bool const upper = |
| has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
| |
| typedef any_real_generator< |
| T, Policies |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| > result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, unused_type) const |
| { |
| typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
| using spirit::detail::get_stateful_data; |
| return result_type(get_stateful_data<tag_type>::call(term)); |
| } |
| }; |
| } |
| |
| template <typename Modifiers> |
| struct make_primitive<tag::float_, Modifiers> |
| : detail::make_real<float, Modifiers> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<tag::double_, Modifiers> |
| : detail::make_real<double, Modifiers> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<tag::long_double, Modifiers> |
| : detail::make_real<long double, Modifiers> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename T, typename Policies, typename Modifiers> |
| struct make_primitive< |
| tag::stateful_tag<Policies, tag::double_, T>, Modifiers> |
| : detail::make_real<T, Modifiers, Policies> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename T, typename Modifiers |
| , typename Policies = real_policies<T> > |
| struct make_real_direct |
| { |
| static bool const lower = |
| has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
| static bool const upper = |
| has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
| |
| typedef literal_real_generator< |
| T, Policies |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , false |
| > result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, unused_type) const |
| { |
| typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
| using spirit::detail::get_stateful_data; |
| return result_type(T(fusion::at_c<0>(term.args)) |
| , get_stateful_data<tag_type>::call(term.term)); |
| } |
| }; |
| } |
| |
| template <typename Modifiers, typename A0> |
| struct make_primitive< |
| terminal_ex<tag::float_, fusion::vector1<A0> >, Modifiers> |
| : detail::make_real_direct<float, Modifiers> {}; |
| |
| template <typename Modifiers, typename A0> |
| struct make_primitive< |
| terminal_ex<tag::double_, fusion::vector1<A0> >, Modifiers> |
| : detail::make_real_direct<double, Modifiers> {}; |
| |
| template <typename Modifiers, typename A0> |
| struct make_primitive< |
| terminal_ex<tag::long_double, fusion::vector1<A0> >, Modifiers> |
| : detail::make_real_direct<long double, Modifiers> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| 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> |
| : detail::make_real_direct<T, Modifiers, Policies> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename T, typename Modifiers> |
| struct basic_real_literal |
| { |
| static bool const lower = |
| has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
| static bool const upper = |
| has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
| |
| typedef literal_real_generator< |
| T, real_policies<T> |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , true |
| > result_type; |
| |
| template <typename T_> |
| result_type operator()(T_ i, unused_type) const |
| { |
| return result_type(T(i)); |
| } |
| }; |
| } |
| |
| template <typename Modifiers> |
| struct make_primitive<float, Modifiers> |
| : detail::basic_real_literal<float, Modifiers> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<double, Modifiers> |
| : detail::basic_real_literal<double, Modifiers> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<long double, Modifiers> |
| : detail::basic_real_literal<long double, Modifiers> {}; |
| |
| }}} |
| |
| #endif // defined(BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM) |