| // 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_BOOL_SEP_28_2009_1113AM) |
| #define BOOST_SPIRIT_KARMA_BOOL_SEP_28_2009_1113AM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/limits.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/karma/meta_compiler.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/bool_policies.hpp> |
| #include <boost/spirit/home/karma/numeric/detail/bool_utils.hpp> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit |
| { |
| namespace karma |
| { |
| /////////////////////////////////////////////////////////////////////// |
| // forward declaration only |
| template <typename T> |
| struct bool_policies; |
| |
| /////////////////////////////////////////////////////////////////////// |
| // This is the class that the user can instantiate directly in |
| // order to create a customized bool generator |
| template <typename T = bool, typename Policies = bool_policies<T> > |
| struct bool_generator |
| : spirit::terminal<tag::stateful_tag<Policies, tag::bool_, T> > |
| { |
| typedef tag::stateful_tag<Policies, tag::bool_, T> tag_type; |
| |
| bool_generator() {} |
| bool_generator(Policies const& data) |
| : spirit::terminal<tag_type>(data) {} |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Enablers |
| /////////////////////////////////////////////////////////////////////////// |
| template <> |
| struct use_terminal<karma::domain, tag::bool_> // enables bool_ |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, tag::true_> // enables true_ |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, tag::false_> // enables false_ |
| : mpl::true_ {}; |
| |
| template <> |
| struct use_terminal<karma::domain, bool> // enables lit(true) |
| : mpl::true_ {}; |
| |
| template <typename A0> |
| struct use_terminal<karma::domain // enables bool_(...) |
| , terminal_ex<tag::bool_, fusion::vector1<A0> > |
| > : mpl::true_ {}; |
| |
| template <> // enables *lazy* bool_(...) |
| struct use_lazy_terminal<karma::domain, tag::bool_, 1> |
| : mpl::true_ {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // enables any custom bool_generator |
| template <typename Policies, typename T> |
| struct use_terminal<karma::domain |
| , tag::stateful_tag<Policies, tag::bool_, T> > |
| : mpl::true_ {}; |
| |
| // enables any custom bool_generator(...) |
| template <typename Policies, typename T, typename A0> |
| struct use_terminal<karma::domain |
| , terminal_ex<tag::stateful_tag<Policies, tag::bool_, T> |
| , fusion::vector1<A0> > > |
| : mpl::true_ {}; |
| |
| // enables *lazy* custom bool_generator |
| template <typename Policies, typename T> |
| struct use_lazy_terminal<karma::domain |
| , tag::stateful_tag<Policies, tag::bool_, T>, 1> |
| : mpl::true_ {}; |
| |
| // enables lit(bool) |
| template <typename A0> |
| struct use_terminal<karma::domain |
| , terminal_ex<tag::lit, fusion::vector1<A0> > |
| , typename enable_if<traits::is_bool<A0> >::type> |
| : mpl::true_ {}; |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace karma |
| { |
| #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS |
| using spirit::bool_; |
| using spirit::true_; |
| using spirit::false_; |
| using spirit::lit; // lit(true) is equivalent to true |
| #endif |
| |
| using spirit::bool_type; |
| using spirit::true_type; |
| using spirit::false_type; |
| using spirit::lit_type; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // This specialization is used for bool generators not having a direct |
| // initializer: bool_. These generators must be used in conjunction with |
| // an Attribute. |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename T, typename CharEncoding, typename Tag, typename Policies> |
| struct any_bool_generator |
| : primitive_generator<any_bool_generator<T, CharEncoding, Tag, Policies> > |
| { |
| public: |
| any_bool_generator(Policies const& p = Policies()) |
| : p_(p) {} |
| |
| typedef typename Policies::properties properties; |
| |
| template <typename Context, typename Unused> |
| struct attribute |
| { |
| typedef T type; |
| }; |
| |
| // bool_ has a Attribute attached |
| 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 |
| |
| return bool_inserter<T, Policies, CharEncoding, Tag>::call( |
| sink, traits::extract_from<T>(attr, context), p_) && |
| delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| // this bool_ 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 boolean 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, bool_not_usable_without_attribute, ()); |
| return false; |
| } |
| |
| template <typename Context> |
| static info what(Context const& /*context*/) |
| { |
| return info("bool"); |
| } |
| |
| Policies p_; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // This specialization is used for bool generators having a direct |
| // initializer: bool_(true), bool_(0) etc. |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename T, typename CharEncoding, typename Tag |
| , typename Policies, bool no_attribute> |
| struct literal_bool_generator |
| : primitive_generator<literal_bool_generator<T, CharEncoding, Tag |
| , Policies, no_attribute> > |
| { |
| public: |
| typedef typename Policies::properties properties; |
| |
| template <typename Context, typename Unused = unused_type> |
| struct attribute |
| : mpl::if_c<no_attribute, unused_type, T> |
| {}; |
| |
| literal_bool_generator(typename add_const<T>::type n |
| , Policies const& p = Policies()) |
| : n_(n), p_(p) {} |
| |
| // A bool_() 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) || |
| bool(n_) != bool(traits::extract_from<attribute_type>(attr, context))) |
| { |
| return false; |
| } |
| return bool_inserter<T, Policies, CharEncoding, Tag>:: |
| call(sink, n_, p_) && delimit_out(sink, d); |
| } |
| |
| // A bool_() 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 |
| { |
| return bool_inserter<T, Policies, CharEncoding, Tag>:: |
| call(sink, n_) && delimit_out(sink, d); |
| } |
| |
| template <typename Context> |
| static info what(Context const& /*context*/) |
| { |
| return info("bool"); |
| } |
| |
| T n_; |
| Policies p_; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Generator generators: make_xxx function (objects) |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename Modifiers, typename T = bool |
| , typename Policies = bool_policies<T> > |
| struct make_bool |
| { |
| 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_bool_generator< |
| T |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , Policies |
| > result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, unused_type) const |
| { |
| typedef tag::stateful_tag<Policies, tag::bool_, T> tag_type; |
| using spirit::detail::get_stateful_data; |
| return result_type(get_stateful_data<tag_type>::call(term)); |
| } |
| }; |
| |
| template <typename Modifiers, bool b> |
| struct make_bool_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_bool_generator< |
| bool |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , bool_policies<>, false |
| > result_type; |
| |
| result_type operator()(unused_type, unused_type) const |
| { |
| return result_type(b); |
| } |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Modifiers> |
| struct make_primitive<tag::bool_, Modifiers> |
| : detail::make_bool<Modifiers> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<tag::true_, Modifiers> |
| : detail::make_bool_literal<Modifiers, true> {}; |
| |
| template <typename Modifiers> |
| struct make_primitive<tag::false_, Modifiers> |
| : detail::make_bool_literal<Modifiers, false> {}; |
| |
| template <typename T, typename Policies, typename Modifiers> |
| struct make_primitive< |
| tag::stateful_tag<Policies, tag::bool_, T>, Modifiers> |
| : detail::make_bool<Modifiers |
| , typename remove_const<T>::type, Policies> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename Modifiers, typename T = bool |
| , typename Policies = bool_policies<T> > |
| struct make_bool_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_bool_generator< |
| T |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , Policies, false |
| > result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, unused_type) const |
| { |
| typedef tag::stateful_tag<Policies, tag::bool_, T> tag_type; |
| using spirit::detail::get_stateful_data; |
| return result_type(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::bool_, fusion::vector1<A0> >, Modifiers> |
| : detail::make_bool_direct<Modifiers> {}; |
| |
| template <typename T, typename Policies, typename A0, typename Modifiers> |
| struct make_primitive< |
| terminal_ex<tag::stateful_tag<Policies, tag::bool_, T> |
| , fusion::vector1<A0> > |
| , Modifiers> |
| : detail::make_bool_direct<Modifiers |
| , typename remove_const<T>::type, Policies> {}; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| namespace detail |
| { |
| template <typename Modifiers> |
| struct basic_bool_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_bool_generator< |
| bool |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , bool_policies<>, true |
| > result_type; |
| |
| template <typename T_> |
| result_type operator()(T_ i, unused_type) const |
| { |
| return result_type(i); |
| } |
| }; |
| } |
| |
| template <typename Modifiers> |
| struct make_primitive<bool, Modifiers> |
| : detail::basic_bool_literal<Modifiers> {}; |
| |
| template <typename Modifiers, typename A0> |
| struct make_primitive< |
| terminal_ex<tag::lit, fusion::vector1<A0> > |
| , Modifiers |
| , typename enable_if<traits::is_bool<A0> >::type> |
| : detail::basic_bool_literal<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_bool_generator< |
| bool |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , bool_policies<>, 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 |