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453 lines
17 KiB
453 lines
17 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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#if !defined(BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM) |
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#define BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM |
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#if defined(_MSC_VER) |
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#pragma once |
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#endif |
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#include <boost/config/no_tr1/cmath.hpp> |
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#include <boost/config.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/utility/enable_if.hpp> |
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#include <boost/spirit/home/support/common_terminals.hpp> |
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#include <boost/spirit/home/support/string_traits.hpp> |
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#include <boost/spirit/home/support/numeric_traits.hpp> |
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#include <boost/spirit/home/support/info.hpp> |
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#include <boost/spirit/home/support/char_class.hpp> |
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#include <boost/spirit/home/support/container.hpp> |
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#include <boost/spirit/home/support/detail/get_encoding.hpp> |
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#include <boost/spirit/home/karma/meta_compiler.hpp> |
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#include <boost/spirit/home/karma/char.hpp> |
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#include <boost/spirit/home/karma/delimit_out.hpp> |
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#include <boost/spirit/home/karma/auxiliary/lazy.hpp> |
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#include <boost/spirit/home/karma/detail/get_casetag.hpp> |
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#include <boost/spirit/home/karma/detail/extract_from.hpp> |
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#include <boost/spirit/home/karma/detail/enable_lit.hpp> |
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#include <boost/spirit/home/karma/domain.hpp> |
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#include <boost/spirit/home/karma/numeric/real_policies.hpp> |
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#include <boost/spirit/home/karma/numeric/detail/real_utils.hpp> |
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#include <boost/fusion/include/at.hpp> |
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#include <boost/fusion/include/value_at.hpp> |
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#include <boost/fusion/include/vector.hpp> |
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namespace boost { namespace spirit |
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{ |
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namespace karma |
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{ |
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/////////////////////////////////////////////////////////////////////// |
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// forward declaration only |
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template <typename T> |
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struct real_policies; |
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/////////////////////////////////////////////////////////////////////// |
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// This is the class that the user can instantiate directly in |
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// order to create a customized real generator |
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template <typename T = double, typename Policies = real_policies<T> > |
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struct real_generator |
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: spirit::terminal<tag::stateful_tag<Policies, tag::double_, T> > |
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{ |
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typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
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real_generator() {} |
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real_generator(Policies const& p) |
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: spirit::terminal<tag_type>(p) {} |
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}; |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// Enablers |
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/////////////////////////////////////////////////////////////////////////// |
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template <> |
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struct use_terminal<karma::domain, tag::float_> // enables float_ |
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: mpl::true_ {}; |
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template <> |
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struct use_terminal<karma::domain, tag::double_> // enables double_ |
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: mpl::true_ {}; |
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template <> |
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struct use_terminal<karma::domain, tag::long_double> // enables long_double |
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: mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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template <> |
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struct use_terminal<karma::domain, float> // enables lit(1.0f) |
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: mpl::true_ {}; |
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template <> |
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struct use_terminal<karma::domain, double> // enables lit(1.0) |
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: mpl::true_ {}; |
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template <> |
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struct use_terminal<karma::domain, long double> // enables lit(1.0l) |
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: mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename A0> |
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struct use_terminal<karma::domain // enables float_(...) |
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, terminal_ex<tag::float_, fusion::vector1<A0> > |
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> : mpl::true_ {}; |
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template <typename A0> |
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struct use_terminal<karma::domain // enables double_(...) |
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, terminal_ex<tag::double_, fusion::vector1<A0> > |
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> : mpl::true_ {}; |
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template <typename A0> |
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struct use_terminal<karma::domain // enables long_double(...) |
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, terminal_ex<tag::long_double, fusion::vector1<A0> > |
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> : mpl::true_ {}; |
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// lazy float_(...), double_(...), long_double(...) |
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template <> |
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struct use_lazy_terminal<karma::domain, tag::float_, 1> |
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: mpl::true_ {}; |
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template <> |
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struct use_lazy_terminal<karma::domain, tag::double_, 1> |
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: mpl::true_ {}; |
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template <> |
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struct use_lazy_terminal<karma::domain, tag::long_double, 1> |
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: mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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// enables custom real generator |
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template <typename T, typename Policies> |
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struct use_terminal<karma::domain |
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, tag::stateful_tag<Policies, tag::double_, T> > |
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: mpl::true_ {}; |
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template <typename T, typename Policies, typename A0> |
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struct use_terminal<karma::domain |
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, terminal_ex<tag::stateful_tag<Policies, tag::double_, T> |
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, fusion::vector1<A0> > > |
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: mpl::true_ {}; |
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// enables *lazy* custom real generator |
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template <typename T, typename Policies> |
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struct use_lazy_terminal< |
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karma::domain |
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, tag::stateful_tag<Policies, tag::double_, T> |
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, 1 // arity |
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> : mpl::true_ {}; |
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// enables lit(double) |
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template <typename A0> |
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struct use_terminal<karma::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<traits::is_real<A0> >::type> |
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: mpl::true_ {}; |
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}} |
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/////////////////////////////////////////////////////////////////////////////// |
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namespace boost { namespace spirit { namespace karma |
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{ |
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS |
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using spirit::float_; |
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using spirit::double_; |
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using spirit::long_double; |
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#endif |
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using spirit::float_type; |
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using spirit::double_type; |
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using spirit::long_double_type; |
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/////////////////////////////////////////////////////////////////////////// |
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// This specialization is used for real generators not having a direct |
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// initializer: float_, double_ etc. These generators must be used in |
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// conjunction with an attribute. |
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/////////////////////////////////////////////////////////////////////////// |
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template < |
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typename T, typename Policies, typename CharEncoding, typename Tag> |
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struct any_real_generator |
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: primitive_generator<any_real_generator<T, Policies, CharEncoding, Tag> > |
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{ |
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typedef typename Policies::properties properties; |
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template <typename Context, typename Unused> |
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struct attribute |
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{ |
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typedef T type; |
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}; |
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any_real_generator(Policies const& policies = Policies()) |
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: p_(policies) {} |
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// double_/float_/etc. has an attached attribute |
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template <typename OutputIterator, typename Context, typename Delimiter |
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, typename Attribute> |
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bool generate(OutputIterator& sink, Context& context |
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, Delimiter const& d, Attribute const& attr) const |
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{ |
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if (!traits::has_optional_value(attr)) |
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return false; // fail if it's an uninitialized optional |
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typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
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return inserter_type::call(sink, traits::extract_from<T>(attr, context), p_) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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// this double_/float_/etc. has no attribute attached, it needs to have |
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// been initialized from a direct literal |
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template <typename OutputIterator, typename Context, typename Delimiter> |
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static bool generate(OutputIterator&, Context&, Delimiter const& |
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, unused_type) |
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{ |
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// It is not possible (doesn't make sense) to use numeric generators |
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// without providing any attribute, as the generator doesn't 'know' |
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// what to output. The following assertion fires if this situation |
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// is detected in your code. |
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BOOST_SPIRIT_ASSERT_MSG(false, real_not_usable_without_attribute, ()); return false; |
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} |
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template <typename Context> |
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static info what(Context const& /*context*/) |
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{ |
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return info("real"); |
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} |
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Policies p_; |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// This specialization is used for real generators having a direct |
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// initializer: float_(10.), double_(20.) etc. |
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/////////////////////////////////////////////////////////////////////////// |
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template < |
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typename T, typename Policies, typename CharEncoding, typename Tag |
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, bool no_attribute> |
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struct literal_real_generator |
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: primitive_generator<literal_real_generator<T, Policies, CharEncoding |
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, Tag, no_attribute> > |
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{ |
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typedef typename Policies::properties properties; |
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template <typename Context, typename Unused = unused_type> |
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struct attribute |
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: mpl::if_c<no_attribute, unused_type, T> |
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{}; |
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literal_real_generator(typename add_const<T>::type n |
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, Policies const& policies = Policies()) |
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: n_(n), p_(policies) {} |
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// A double_(1.0) which additionally has an associated attribute emits |
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// its immediate literal only if it matches the attribute, otherwise |
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// it fails. |
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template <typename OutputIterator, typename Context, typename Delimiter |
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, typename Attribute> |
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bool generate(OutputIterator& sink, Context& context |
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, Delimiter const& d, Attribute const& attr) const |
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{ |
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typedef typename attribute<Context>::type attribute_type; |
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if (!traits::has_optional_value(attr) || |
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n_ != traits::extract_from<attribute_type>(attr, context)) |
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{ |
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return false; |
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} |
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typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
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return inserter_type::call(sink, n_, p_) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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// A double_(1.0) without any associated attribute just emits its |
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// immediate literal |
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template <typename OutputIterator, typename Context, typename Delimiter> |
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bool generate(OutputIterator& sink, Context&, Delimiter const& d |
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, unused_type) const |
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{ |
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typedef real_inserter<T, Policies, CharEncoding, Tag> inserter_type; |
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return inserter_type::call(sink, n_, p_) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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template <typename Context> |
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static info what(Context const& /*context*/) |
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{ |
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return info("real"); |
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} |
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T n_; |
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Policies p_; |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// Generator generators: make_xxx function (objects) |
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/////////////////////////////////////////////////////////////////////////// |
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namespace detail |
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{ |
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template <typename T, typename Modifiers |
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, typename Policies = real_policies<T> > |
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struct make_real |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef any_real_generator< |
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T, Policies |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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> result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
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using spirit::detail::get_stateful_data; |
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return result_type(get_stateful_data<tag_type>::call(term)); |
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} |
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}; |
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} |
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template <typename Modifiers> |
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struct make_primitive<tag::float_, Modifiers> |
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: detail::make_real<float, Modifiers> {}; |
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template <typename Modifiers> |
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struct make_primitive<tag::double_, Modifiers> |
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: detail::make_real<double, Modifiers> {}; |
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template <typename Modifiers> |
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struct make_primitive<tag::long_double, Modifiers> |
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: detail::make_real<long double, Modifiers> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename T, typename Policies, typename Modifiers> |
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struct make_primitive< |
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tag::stateful_tag<Policies, tag::double_, T>, Modifiers> |
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: detail::make_real<typename remove_const<T>::type |
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, Modifiers, Policies> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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namespace detail |
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{ |
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template <typename T, typename Modifiers |
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, typename Policies = real_policies<T> > |
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struct make_real_direct |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef literal_real_generator< |
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T, Policies |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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, false |
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> result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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typedef tag::stateful_tag<Policies, tag::double_, T> tag_type; |
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using spirit::detail::get_stateful_data; |
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return result_type(T(fusion::at_c<0>(term.args)) |
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, get_stateful_data<tag_type>::call(term.term)); |
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} |
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}; |
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} |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::float_, fusion::vector1<A0> >, Modifiers> |
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: detail::make_real_direct<float, Modifiers> {}; |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::double_, fusion::vector1<A0> >, Modifiers> |
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: detail::make_real_direct<double, Modifiers> {}; |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::long_double, fusion::vector1<A0> >, Modifiers> |
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: detail::make_real_direct<long double, Modifiers> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename T, typename Policies, typename A0, typename Modifiers> |
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struct make_primitive< |
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terminal_ex<tag::stateful_tag<Policies, tag::double_, T> |
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, fusion::vector1<A0> > |
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, Modifiers> |
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: detail::make_real_direct<typename remove_const<T>::type |
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, Modifiers, Policies> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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namespace detail |
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{ |
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template <typename T, typename Modifiers> |
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struct basic_real_literal |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef literal_real_generator< |
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T, real_policies<T> |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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, true |
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> result_type; |
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template <typename T_> |
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result_type operator()(T_ i, unused_type) const |
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{ |
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return result_type(T(i)); |
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} |
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}; |
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} |
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template <typename Modifiers> |
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struct make_primitive<float, Modifiers> |
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: detail::basic_real_literal<float, Modifiers> {}; |
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template <typename Modifiers> |
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struct make_primitive<double, Modifiers> |
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: detail::basic_real_literal<double, Modifiers> {}; |
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template <typename Modifiers> |
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struct make_primitive<long double, Modifiers> |
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: detail::basic_real_literal<long double, Modifiers> {}; |
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// lit(double) |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::lit, fusion::vector1<A0> > |
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, Modifiers |
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, typename enable_if<traits::is_real<A0> >::type> |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef literal_real_generator< |
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typename remove_const<A0>::type, real_policies<A0> |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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, true |
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> result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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return result_type(fusion::at_c<0>(term.args)); |
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} |
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}; |
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}}} |
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#endif // defined(BOOST_SPIRIT_KARMA_REAL_FEB_26_2007_0512PM)
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