| // 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(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/config.hpp> | |
| #include <boost/mpl/bool.hpp> | |
| #include <boost/utility/enable_if.hpp> | |
| #include <boost/spirit/home/support/common_terminals.hpp> | |
| #include <boost/spirit/home/support/string_traits.hpp> | |
| #include <boost/spirit/home/support/numeric_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/detail/enable_lit.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 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(1.0f) | |
| : 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_ {}; | |
| // enables lit(double) | |
| template <typename A0> | |
| struct use_terminal<karma::domain | |
| , terminal_ex<tag::lit, fusion::vector1<A0> > | |
| , typename enable_if<traits::is_real<A0> >::type> | |
| : 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> {}; | |
| // lit(double) | |
| template <typename Modifiers, typename A0> | |
| struct make_primitive< | |
| terminal_ex<tag::lit, fusion::vector1<A0> > | |
| , Modifiers | |
| , typename enable_if<traits::is_real<A0> >::type> | |
| : detail::basic_real_literal<A0, Modifiers> | |
| { | |
| 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< | |
| A0, real_policies<A0> | |
| , 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 Terminal> | |
| result_type operator()(Terminal const& term, unused_type) const | |
| { | |
| return result_type(fusion::at_c<0>(term.args)); | |
| } | |
| }; | |
| }}} | |
| #endif // defined(BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM) |