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bool.hpp
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int.hpp
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/usr/include/boost/spirit/home/karma/numeric/bool.hpp
(16110B)
// 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_FAIL(OutputIterator, 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
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