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407 lines
14 KiB
407 lines
14 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Copyright (c) 2011 Bryce Lelbach |
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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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==============================================================================*/ |
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#if !defined(BOOST_SPIRIT_INT_APR_17_2006_0830AM) |
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#define BOOST_SPIRIT_INT_APR_17_2006_0830AM |
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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/spirit/home/qi/skip_over.hpp> |
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#include <boost/spirit/home/qi/detail/enable_lit.hpp> |
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#include <boost/spirit/home/qi/numeric/numeric_utils.hpp> |
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#include <boost/spirit/home/qi/meta_compiler.hpp> |
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#include <boost/spirit/home/qi/parser.hpp> |
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#include <boost/spirit/home/support/common_terminals.hpp> |
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#include <boost/spirit/home/support/info.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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namespace boost { namespace spirit |
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{ |
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namespace tag |
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{ |
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template <typename T, unsigned Radix, unsigned MinDigits |
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, int MaxDigits> |
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struct int_parser {}; |
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} |
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namespace qi |
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{ |
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/////////////////////////////////////////////////////////////////////// |
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// This one is the class that the user can instantiate directly in |
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// order to create a customized int parser |
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template <typename T = int, unsigned Radix = 10, unsigned MinDigits = 1 |
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, int MaxDigits = -1> |
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struct int_parser |
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: spirit::terminal<tag::int_parser<T, Radix, MinDigits, MaxDigits> > |
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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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//[primitive_parsers_enable_short |
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template <> // enables short_ |
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struct use_terminal<qi::domain, tag::short_> : mpl::true_ {}; |
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//] |
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template <typename A0> // enables lit(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<is_same<A0, signed short> >::type> |
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: mpl::true_ {}; |
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template <typename A0> // enables short_(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::short_, fusion::vector1<A0> > > |
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: is_arithmetic<A0> {}; |
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template <> // enables *lazy* short_(n) |
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struct use_lazy_terminal<qi::domain, tag::short_, 1> : mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_enable_int |
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template <> // enables int_ |
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struct use_terminal<qi::domain, tag::int_> : mpl::true_ {}; |
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//] |
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template <typename A0> // enables lit(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<is_same<A0, signed> >::type> |
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: mpl::true_ {}; |
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template <typename A0> // enables int_(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::int_, fusion::vector1<A0> > > |
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: is_arithmetic<A0> {}; |
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template <> // enables *lazy* int_(n) |
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struct use_lazy_terminal<qi::domain, tag::int_, 1> : mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_enable_long |
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template <> // enables long_ |
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struct use_terminal<qi::domain, tag::long_> : mpl::true_ {}; |
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//] |
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template <typename A0> // enables lit(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<is_same<A0, signed long> >::type> |
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: mpl::true_ {}; |
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template <typename A0> // enables long_(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::long_, fusion::vector1<A0> > > |
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: is_arithmetic<A0> {}; |
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template <> // enables *lazy* long_(n) |
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struct use_lazy_terminal<qi::domain, tag::long_, 1> : mpl::true_ {}; |
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/////////////////////////////////////////////////////////////////////////// |
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#ifdef BOOST_HAS_LONG_LONG |
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//[primitive_parsers_enable_long_long |
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template <> // enables long_long |
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struct use_terminal<qi::domain, tag::long_long> : mpl::true_ {}; |
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//] |
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template <typename A0> // enables lit(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<is_same<A0, boost::long_long_type> >::type> |
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: mpl::true_ {}; |
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template <typename A0> // enables long_long(n) |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::long_long, fusion::vector1<A0> > > |
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: is_arithmetic<A0> {}; |
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template <> // enables *lazy* long_long(n) |
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struct use_lazy_terminal<qi::domain, tag::long_long, 1> : mpl::true_ {}; |
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#endif |
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/////////////////////////////////////////////////////////////////////////// |
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// enables any custom int_parser |
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template <typename T, unsigned Radix, unsigned MinDigits |
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, int MaxDigits> |
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struct use_terminal<qi::domain |
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, tag::int_parser<T, Radix, MinDigits, MaxDigits> > |
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: mpl::true_ {}; |
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// enables any custom int_parser(n) |
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template <typename T, unsigned Radix, unsigned MinDigits |
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, int MaxDigits, typename A0> |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::int_parser<T, Radix, MinDigits, MaxDigits> |
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, fusion::vector1<A0> > |
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> : mpl::true_ {}; |
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// enables *lazy* custom int_parser(n) |
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template <typename T, unsigned Radix, unsigned MinDigits |
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, int MaxDigits> |
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struct use_lazy_terminal<qi::domain |
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, tag::int_parser<T, Radix, MinDigits, MaxDigits>, 1 |
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> : mpl::true_ {}; |
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}} |
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namespace boost { namespace spirit { namespace qi |
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{ |
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS |
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using spirit::short_; |
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using spirit::int_; |
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using spirit::long_; |
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#ifdef BOOST_HAS_LONG_LONG |
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using spirit::long_long; |
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#endif |
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using spirit::lit; // lit(1) is equivalent to 1 |
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#endif |
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using spirit::short_type; |
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using spirit::int_type; |
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using spirit::long_type; |
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using spirit::lit_type; |
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#ifdef BOOST_HAS_LONG_LONG |
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using spirit::long_long_type; |
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#endif |
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using spirit::lit_type; |
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/////////////////////////////////////////////////////////////////////////// |
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// This is the actual int parser |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_int_parser |
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template < |
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typename T |
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, unsigned Radix = 10 |
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, unsigned MinDigits = 1 |
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, int MaxDigits = -1> |
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struct any_int_parser |
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: primitive_parser<any_int_parser<T, Radix, MinDigits, MaxDigits> > |
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{ |
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// check template parameter 'Radix' for validity |
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BOOST_SPIRIT_ASSERT_MSG( |
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Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16, |
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not_supported_radix, ()); |
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template <typename Context, typename Iterator> |
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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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template <typename Iterator, typename Context |
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, typename Skipper, typename Attribute> |
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bool parse(Iterator& first, Iterator const& last |
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, Context& /*context*/, Skipper const& skipper |
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, Attribute& attr) const |
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{ |
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typedef extract_int<T, Radix, MinDigits, MaxDigits> extract; |
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qi::skip_over(first, last, skipper); |
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return extract::call(first, last, attr); |
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} |
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template <typename Context> |
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info what(Context& /*context*/) const |
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{ |
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return info("integer"); |
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} |
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}; |
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//] |
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template <typename T, unsigned Radix = 10, unsigned MinDigits = 1 |
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, int MaxDigits = -1, bool no_attribute = true> |
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struct literal_int_parser |
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: primitive_parser<literal_int_parser<T, Radix, MinDigits, MaxDigits |
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, no_attribute> > |
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{ |
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// check template parameter 'Radix' for validity |
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BOOST_SPIRIT_ASSERT_MSG( |
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Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16, |
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not_supported_radix, ()); |
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template <typename Value> |
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literal_int_parser(Value const& n) : n_(n) {} |
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template <typename Context, typename Iterator> |
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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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template <typename Iterator, typename Context |
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, typename Skipper, typename Attribute> |
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bool parse(Iterator& first, Iterator const& last |
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, Context& /*context*/, Skipper const& skipper |
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, Attribute& attr) const |
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{ |
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typedef extract_int<T, Radix, MinDigits, MaxDigits> extract; |
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qi::skip_over(first, last, skipper); |
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Iterator save = first; |
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T attr_; |
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if (extract::call(first, last, attr_) && (attr_ == n_)) |
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{ |
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traits::assign_to(attr_, attr); |
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return true; |
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} |
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first = save; |
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return false; |
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} |
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template <typename Context> |
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info what(Context& /*context*/) const |
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{ |
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return info("integer"); |
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} |
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T n_; |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// Parser generators: make_xxx function (objects) |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_make_int |
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template < |
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typename T |
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, unsigned Radix = 10 |
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, unsigned MinDigits = 1 |
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, int MaxDigits = -1> |
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struct make_int |
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{ |
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typedef any_int_parser<T, Radix, MinDigits, MaxDigits> result_type; |
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result_type operator()(unused_type, unused_type) const |
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{ |
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return result_type(); |
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} |
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}; |
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//] |
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template <typename T, unsigned Radix = 10, unsigned MinDigits = 1 |
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, int MaxDigits = -1> |
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struct make_direct_int |
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{ |
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typedef literal_int_parser<T, Radix, MinDigits, MaxDigits, 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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return result_type(fusion::at_c<0>(term.args)); |
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} |
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}; |
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template <typename T, unsigned Radix = 10, unsigned MinDigits = 1 |
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, int MaxDigits = -1> |
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struct make_literal_int |
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{ |
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typedef literal_int_parser<T, Radix, MinDigits, MaxDigits> 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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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, typename enable_if<is_same<A0, signed short> >::type> |
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: make_literal_int<signed short> {}; |
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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, typename enable_if<is_same<A0, signed> >::type> |
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: make_literal_int<signed> {}; |
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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, typename enable_if<is_same<A0, signed long> >::type> |
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: make_literal_int<signed long> {}; |
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#ifdef BOOST_HAS_LONG_LONG |
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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, typename enable_if<is_same<A0, boost::long_long_type> >::type> |
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: make_literal_int<boost::long_long_type> {}; |
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#endif |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename T, unsigned Radix, unsigned MinDigits, int MaxDigits |
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, typename Modifiers> |
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struct make_primitive< |
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tag::int_parser<T, Radix, MinDigits, MaxDigits> |
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, Modifiers> |
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: make_int<T, Radix, MinDigits, MaxDigits> {}; |
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template <typename T, unsigned Radix, unsigned MinDigits, int MaxDigits |
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, typename A0, typename Modifiers> |
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struct make_primitive< |
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terminal_ex<tag::int_parser<T, Radix, MinDigits, MaxDigits> |
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, fusion::vector1<A0> >, Modifiers> |
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: make_direct_int<T, Radix, MinDigits, MaxDigits> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_short_primitive |
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template <typename Modifiers> |
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struct make_primitive<tag::short_, Modifiers> |
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: make_int<short> {}; |
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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::short_ |
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, fusion::vector1<A0> > , Modifiers> |
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: make_direct_int<short> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_int_primitive |
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template <typename Modifiers> |
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struct make_primitive<tag::int_, Modifiers> |
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: make_int<int> {}; |
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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::int_ |
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, fusion::vector1<A0> > , Modifiers> |
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: make_direct_int<int> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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//[primitive_parsers_long_primitive |
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template <typename Modifiers> |
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struct make_primitive<tag::long_, Modifiers> |
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: make_int<long> {}; |
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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::long_ |
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, fusion::vector1<A0> > , Modifiers> |
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: make_direct_int<long> {}; |
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/////////////////////////////////////////////////////////////////////////// |
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#ifdef BOOST_HAS_LONG_LONG |
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//[primitive_parsers_long_long_primitive |
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template <typename Modifiers> |
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struct make_primitive<tag::long_long, Modifiers> |
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: make_int<boost::long_long_type> {}; |
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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::long_long |
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, fusion::vector1<A0> > , Modifiers> |
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: make_direct_int<boost::long_long_type> {}; |
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#endif |
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}}} |
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#endif
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