boost/spirit/home/karma/numeric/int.hpp
// Copyright (c) 2001-2010 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_INT_FEB_23_2007_0840PM) #define BOOST_SPIRIT_KARMA_INT_FEB_23_2007_0840PM #if defined(_MSC_VER) #pragma once #endif #include <limits> #include <boost/spirit/home/support/common_terminals.hpp> #include <boost/spirit/home/support/string_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/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/domain.hpp> #include <boost/spirit/home/karma/numeric/detail/numeric_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 tag { template <typename T, unsigned Radix, bool force_sign> struct int_tag {}; } namespace karma { /////////////////////////////////////////////////////////////////////// // This one is the class that the user can instantiate directly in // order to create a customized int generator template <typename T = int, unsigned Radix = 10, bool force_sign = false> struct int_generator : spirit::terminal<tag::int_tag<T, Radix, force_sign> > {}; } /////////////////////////////////////////////////////////////////////////// // Enablers /////////////////////////////////////////////////////////////////////////// template <> struct use_terminal<karma::domain, tag::short_> // enables short_ : mpl::true_ {}; template <> struct use_terminal<karma::domain, tag::int_> // enables int_ : mpl::true_ {}; template <> struct use_terminal<karma::domain, tag::long_> // enables long_ : mpl::true_ {}; #ifdef BOOST_HAS_LONG_LONG template <> struct use_terminal<karma::domain, tag::long_long> // enables long_long : mpl::true_ {}; #endif /////////////////////////////////////////////////////////////////////////// template <> struct use_terminal<karma::domain, short> // enables lit(short(0)) : mpl::true_ {}; template <> struct use_terminal<karma::domain, int> // enables lit(0) : mpl::true_ {}; template <> struct use_terminal<karma::domain, long> // enables lit(0L) : mpl::true_ {}; #ifdef BOOST_HAS_LONG_LONG template <> struct use_terminal<karma::domain, boost::long_long_type> // enables lit(0LL) : mpl::true_ {}; #endif /////////////////////////////////////////////////////////////////////////// template <typename A0> struct use_terminal<karma::domain // enables short_(...) , terminal_ex<tag::short_, fusion::vector1<A0> > > : mpl::true_ {}; template <typename A0> struct use_terminal<karma::domain // enables int_(...) , terminal_ex<tag::int_, fusion::vector1<A0> > > : mpl::true_ {}; template <typename A0> struct use_terminal<karma::domain // enables long_(...) , terminal_ex<tag::long_, fusion::vector1<A0> > > : mpl::true_ {}; #ifdef BOOST_HAS_LONG_LONG template <typename A0> struct use_terminal<karma::domain // enables long_long(...) , terminal_ex<tag::long_long, fusion::vector1<A0> > > : mpl::true_ {}; #endif /////////////////////////////////////////////////////////////////////////// template <> // enables *lazy* short_(...) struct use_lazy_terminal<karma::domain, tag::short_, 1> : mpl::true_ {}; template <> // enables *lazy* int_(...) struct use_lazy_terminal<karma::domain, tag::int_, 1> : mpl::true_ {}; template <> // enables *lazy* long_(...) struct use_lazy_terminal<karma::domain, tag::long_, 1> : mpl::true_ {}; #ifdef BOOST_HAS_LONG_LONG template <> // enables *lazy* long_long(...) struct use_lazy_terminal<karma::domain, tag::long_long, 1> : mpl::true_ {}; #endif /////////////////////////////////////////////////////////////////////////// // enables any custom int_generator template <typename T, unsigned Radix, bool force_sign> struct use_terminal<karma::domain, tag::int_tag<T, Radix, force_sign> > : mpl::true_ {}; // enables any custom int_generator(...) template <typename T, unsigned Radix, bool force_sign, typename A0> struct use_terminal<karma::domain , terminal_ex<tag::int_tag<T, Radix, force_sign>, fusion::vector1<A0> > > : mpl::true_ {}; // enables *lazy* custom int_generator template <typename T, unsigned Radix, bool force_sign> struct use_lazy_terminal< karma::domain , tag::int_tag<T, Radix, force_sign> , 1 // arity > : mpl::true_ {}; }} /////////////////////////////////////////////////////////////////////////////// namespace boost { namespace spirit { namespace karma { using spirit::short_; using spirit::short__type; using spirit::int_; using spirit::int__type; using spirit::long_; using spirit::long__type; #ifdef BOOST_HAS_LONG_LONG using spirit::long_long; using spirit::long_long_type; #endif using spirit::lit; // lit(1) is equivalent to 1 /////////////////////////////////////////////////////////////////////////// // This specialization is used for int generators not having a direct // initializer: int_, long_ etc. These generators must be used in // conjunction with an Attribute. /////////////////////////////////////////////////////////////////////////// template < typename T, typename CharEncoding, typename Tag, unsigned Radix , bool force_sign> struct any_int_generator : primitive_generator<any_int_generator<T, CharEncoding, Tag, Radix , force_sign> > { private: template <typename OutputIterator, typename Attribute> static bool insert_int(OutputIterator& sink, Attribute const& attr) { return sign_inserter::call(sink, detail::is_zero(attr) , detail::is_negative(attr), force_sign) && int_inserter<Radix, CharEncoding, Tag>::call(sink , detail::absolute_value(attr)); } public: template <typename Context, typename Unused> struct attribute { typedef T type; }; // check template Attribute 'Radix' for validity BOOST_SPIRIT_ASSERT_MSG( Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16, not_supported_radix, ()); BOOST_SPIRIT_ASSERT_MSG(std::numeric_limits<T>::is_signed, signed_unsigned_mismatch, ()); // int has a Attribute attached template <typename OutputIterator, typename Context, typename Delimiter , typename Attribute> static bool generate(OutputIterator& sink, Context& context, Delimiter const& d , Attribute const& attr) { if (!traits::has_optional_value(attr)) return false; // fail if it's an uninitialized optional return insert_int(sink, traits::extract_from(attr, context)) && delimit_out(sink, d); // always do post-delimiting } // this int 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, int_not_usable_without_attribute, ()); return false; } template <typename Context> static info what(Context const& /*context*/) { return info("integer"); } }; /////////////////////////////////////////////////////////////////////////// // This specialization is used for int generators having a direct // initializer: int_(10), long_(20) etc. /////////////////////////////////////////////////////////////////////////// template < typename T, typename CharEncoding, typename Tag, unsigned Radix , bool force_sign, bool no_attribute> struct literal_int_generator : primitive_generator<literal_int_generator<T, CharEncoding, Tag, Radix , force_sign, no_attribute> > { private: template <typename OutputIterator, typename Attribute> static bool insert_int(OutputIterator& sink, Attribute const& attr) { return sign_inserter::call(sink, detail::is_zero(attr) , detail::is_negative(attr), force_sign) && int_inserter<Radix, CharEncoding, Tag>::call(sink , detail::absolute_value(attr)); } public: template <typename Context, typename Unused> struct attribute : mpl::if_c<no_attribute, unused_type, T> {}; literal_int_generator(typename add_const<T>::type n) : n_(n) {} // check template Attribute 'Radix' for validity BOOST_SPIRIT_ASSERT_MSG( Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16, not_supported_radix, ()); BOOST_SPIRIT_ASSERT_MSG(std::numeric_limits<T>::is_signed, signed_unsigned_mismatch, ()); // A int_(1) 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 { if (!traits::has_optional_value(attr) || n_ != traits::extract_from(attr, context)) { return false; } return insert_int(sink, n_) && delimit_out(sink, d); } // A int_(1) 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 insert_int(sink, n_) && delimit_out(sink, d); } template <typename Context> static info what(Context const& /*context*/) { return info("integer"); } T n_; }; /////////////////////////////////////////////////////////////////////////// // Generator generators: make_xxx function (objects) /////////////////////////////////////////////////////////////////////////// namespace detail { template <typename T, typename Modifiers, unsigned Radix = 10 , bool force_sign = false> struct make_int { 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_int_generator< T , typename spirit::detail::get_encoding< Modifiers, unused_type, lower || upper>::type , typename detail::get_casetag<Modifiers, lower || upper>::type , Radix , force_sign > result_type; result_type operator()(unused_type, unused_type) const { return result_type(); } }; } /////////////////////////////////////////////////////////////////////////// template <typename Modifiers> struct make_primitive<tag::short_, Modifiers> : detail::make_int<short, Modifiers> {}; template <typename Modifiers> struct make_primitive<tag::int_, Modifiers> : detail::make_int<int, Modifiers> {}; template <typename Modifiers> struct make_primitive<tag::long_, Modifiers> : detail::make_int<long, Modifiers> {}; #ifdef BOOST_HAS_LONG_LONG template <typename Modifiers> struct make_primitive<tag::long_long, Modifiers> : detail::make_int<boost::long_long_type, Modifiers> {}; #endif template <typename T, unsigned Radix, bool force_sign, typename Modifiers> struct make_primitive<tag::int_tag<T, Radix, force_sign>, Modifiers> : detail::make_int<T, Modifiers, Radix, force_sign> {}; /////////////////////////////////////////////////////////////////////////// namespace detail { template <typename T, typename Modifiers, unsigned Radix = 10 , bool force_sign = false> struct make_int_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_int_generator< T , typename spirit::detail::get_encoding< Modifiers, unused_type, lower || upper>::type , typename detail::get_casetag<Modifiers, lower || upper>::type , Radix, force_sign, false > result_type; template <typename Terminal> result_type operator()(Terminal const& term, unused_type) const { return result_type(fusion::at_c<0>(term.args)); } }; } /////////////////////////////////////////////////////////////////////////// template <typename Modifiers, typename A0> struct make_primitive< terminal_ex<tag::short_, fusion::vector1<A0> >, Modifiers> : detail::make_int_direct<short, Modifiers> {}; template <typename Modifiers, typename A0> struct make_primitive< terminal_ex<tag::int_, fusion::vector1<A0> >, Modifiers> : detail::make_int_direct<int, Modifiers> {}; template <typename Modifiers, typename A0> struct make_primitive< terminal_ex<tag::long_, fusion::vector1<A0> >, Modifiers> : detail::make_int_direct<long, Modifiers> {}; #ifdef BOOST_HAS_LONG_LONG template <typename Modifiers, typename A0> struct make_primitive< terminal_ex<tag::long_long, fusion::vector1<A0> >, Modifiers> : detail::make_int_direct<boost::long_long_type, Modifiers> {}; #endif template <typename T, unsigned Radix, bool force_sign, typename A0 , typename Modifiers> struct make_primitive< terminal_ex<tag::int_tag<T, Radix, force_sign>, fusion::vector1<A0> > , Modifiers> : detail::make_int_direct<T, Modifiers, Radix, force_sign> {}; /////////////////////////////////////////////////////////////////////////// namespace detail { template <typename T, typename Modifiers> struct basic_int_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_int_generator< T , typename spirit::detail::get_encoding< Modifiers, unused_type, lower || upper>::type , typename detail::get_casetag<Modifiers, lower || upper>::type , 10, false, true > result_type; template <typename T_> result_type operator()(T_ i, unused_type) const { return result_type(i); } }; } template <typename Modifiers> struct make_primitive<short, Modifiers> : detail::basic_int_literal<int, Modifiers> {}; template <typename Modifiers> struct make_primitive<int, Modifiers> : detail::basic_int_literal<int, Modifiers> {}; template <typename Modifiers> struct make_primitive<long, Modifiers> : detail::basic_int_literal<long, Modifiers> {}; #ifdef BOOST_HAS_LONG_LONG template <typename Modifiers> struct make_primitive<boost::long_long_type, Modifiers> : detail::basic_int_literal<boost::long_long_type, Modifiers> {}; #endif }}} #endif