| // 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 <limits> | |
| #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 | |
| { | |
| using spirit::bool_; | |
| using spirit::bool__type; | |
| using spirit::true_; | |
| using spirit::true__type; | |
| using spirit::false_; | |
| using spirit::false__type; | |
| using spirit::lit; // lit(true) is equivalent to true | |
| 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, T, 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, T, 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 |