boost/spirit/home/qi/numeric/int.hpp
/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2011 Bryce Lelbach
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_INT_APR_17_2006_0830AM)
#define BOOST_SPIRIT_INT_APR_17_2006_0830AM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/qi/skip_over.hpp>
#include <boost/spirit/home/qi/detail/enable_lit.hpp>
#include <boost/spirit/home/qi/numeric/numeric_utils.hpp>
#include <boost/spirit/home/qi/meta_compiler.hpp>
#include <boost/spirit/home/qi/parser.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/support/detail/is_spirit_tag.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_same.hpp>
namespace boost { namespace spirit
{
namespace tag
{
template <typename T, unsigned Radix, unsigned MinDigits
, int MaxDigits>
struct int_parser
{
BOOST_SPIRIT_IS_TAG()
};
}
namespace qi
{
///////////////////////////////////////////////////////////////////////
// This one is the class that the user can instantiate directly in
// order to create a customized int parser
template <typename T = int, unsigned Radix = 10, unsigned MinDigits = 1
, int MaxDigits = -1>
struct int_parser
: spirit::terminal<tag::int_parser<T, Radix, MinDigits, MaxDigits> >
{};
}
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_enable_short
template <> // enables short_
struct use_terminal<qi::domain, tag::short_> : mpl::true_ {};
//]
template <typename A0> // enables lit(n)
struct use_terminal<qi::domain
, terminal_ex<tag::lit, fusion::vector1<A0> >
, typename enable_if<is_same<A0, signed short> >::type>
: mpl::true_ {};
template <typename A0> // enables short_(n)
struct use_terminal<qi::domain
, terminal_ex<tag::short_, fusion::vector1<A0> > >
: is_arithmetic<A0> {};
template <> // enables *lazy* short_(n)
struct use_lazy_terminal<qi::domain, tag::short_, 1> : mpl::true_ {};
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_enable_int
template <> // enables int_
struct use_terminal<qi::domain, tag::int_> : mpl::true_ {};
//]
template <typename A0> // enables lit(n)
struct use_terminal<qi::domain
, terminal_ex<tag::lit, fusion::vector1<A0> >
, typename enable_if<is_same<A0, signed> >::type>
: mpl::true_ {};
template <typename A0> // enables int_(n)
struct use_terminal<qi::domain
, terminal_ex<tag::int_, fusion::vector1<A0> > >
: is_arithmetic<A0> {};
template <> // enables *lazy* int_(n)
struct use_lazy_terminal<qi::domain, tag::int_, 1> : mpl::true_ {};
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_enable_long
template <> // enables long_
struct use_terminal<qi::domain, tag::long_> : mpl::true_ {};
//]
template <typename A0> // enables lit(n)
struct use_terminal<qi::domain
, terminal_ex<tag::lit, fusion::vector1<A0> >
, typename enable_if<is_same<A0, signed long> >::type>
: mpl::true_ {};
template <typename A0> // enables long_(n)
struct use_terminal<qi::domain
, terminal_ex<tag::long_, fusion::vector1<A0> > >
: is_arithmetic<A0> {};
template <> // enables *lazy* long_(n)
struct use_lazy_terminal<qi::domain, tag::long_, 1> : mpl::true_ {};
///////////////////////////////////////////////////////////////////////////
#ifdef BOOST_HAS_LONG_LONG
//[primitive_parsers_enable_long_long
template <> // enables long_long
struct use_terminal<qi::domain, tag::long_long> : mpl::true_ {};
//]
template <typename A0> // enables lit(n)
struct use_terminal<qi::domain
, terminal_ex<tag::lit, fusion::vector1<A0> >
, typename enable_if<is_same<A0, boost::long_long_type> >::type>
: mpl::true_ {};
template <typename A0> // enables long_long(n)
struct use_terminal<qi::domain
, terminal_ex<tag::long_long, fusion::vector1<A0> > >
: is_arithmetic<A0> {};
template <> // enables *lazy* long_long(n)
struct use_lazy_terminal<qi::domain, tag::long_long, 1> : mpl::true_ {};
#endif
///////////////////////////////////////////////////////////////////////////
// enables any custom int_parser
template <typename T, unsigned Radix, unsigned MinDigits
, int MaxDigits>
struct use_terminal<qi::domain
, tag::int_parser<T, Radix, MinDigits, MaxDigits> >
: mpl::true_ {};
// enables any custom int_parser(n)
template <typename T, unsigned Radix, unsigned MinDigits
, int MaxDigits, typename A0>
struct use_terminal<qi::domain
, terminal_ex<tag::int_parser<T, Radix, MinDigits, MaxDigits>
, fusion::vector1<A0> >
> : mpl::true_ {};
// enables *lazy* custom int_parser(n)
template <typename T, unsigned Radix, unsigned MinDigits
, int MaxDigits>
struct use_lazy_terminal<qi::domain
, tag::int_parser<T, Radix, MinDigits, MaxDigits>, 1
> : mpl::true_ {};
}}
namespace boost { namespace spirit { namespace qi
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
using spirit::short_;
using spirit::int_;
using spirit::long_;
#ifdef BOOST_HAS_LONG_LONG
using spirit::long_long;
#endif
using spirit::lit; // lit(1) is equivalent to 1
#endif
using spirit::short_type;
using spirit::int_type;
using spirit::long_type;
using spirit::lit_type;
#ifdef BOOST_HAS_LONG_LONG
using spirit::long_long_type;
#endif
using spirit::lit_type;
///////////////////////////////////////////////////////////////////////////
// This is the actual int parser
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_int_parser
template <
typename T
, unsigned Radix = 10
, unsigned MinDigits = 1
, int MaxDigits = -1>
struct any_int_parser
: primitive_parser<any_int_parser<T, Radix, MinDigits, MaxDigits> >
{
// check template parameter 'Radix' for validity
BOOST_SPIRIT_ASSERT_MSG(
Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16,
not_supported_radix, ());
template <typename Context, typename Iterator>
struct attribute
{
typedef T type;
};
template <typename Iterator, typename Context
, typename Skipper, typename Attribute>
bool parse(Iterator& first, Iterator const& last
, Context& /*context*/, Skipper const& skipper
, Attribute& attr_) const
{
typedef extract_int<T, Radix, MinDigits, MaxDigits> extract;
qi::skip_over(first, last, skipper);
return extract::call(first, last, attr_);
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("integer");
}
};
//]
template <typename T, unsigned Radix = 10, unsigned MinDigits = 1
, int MaxDigits = -1, bool no_attribute = true>
struct literal_int_parser
: primitive_parser<literal_int_parser<T, Radix, MinDigits, MaxDigits
, no_attribute> >
{
// check template parameter 'Radix' for validity
BOOST_SPIRIT_ASSERT_MSG(
Radix == 2 || Radix == 8 || Radix == 10 || Radix == 16,
not_supported_radix, ());
template <typename Value>
literal_int_parser(Value const& n) : n_(n) {}
template <typename Context, typename Iterator>
struct attribute
: mpl::if_c<no_attribute, unused_type, T>
{};
template <typename Iterator, typename Context
, typename Skipper, typename Attribute>
bool parse(Iterator& first, Iterator const& last
, Context& /*context*/, Skipper const& skipper
, Attribute& attr_param) const
{
typedef extract_int<T, Radix, MinDigits, MaxDigits> extract;
qi::skip_over(first, last, skipper);
Iterator save = first;
T attr_;
if (extract::call(first, last, attr_) && (attr_ == n_))
{
traits::assign_to(attr_, attr_param);
return true;
}
first = save;
return false;
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("integer");
}
T n_;
};
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_make_int
template <
typename T
, unsigned Radix = 10
, unsigned MinDigits = 1
, int MaxDigits = -1>
struct make_int
{
typedef any_int_parser<T, Radix, MinDigits, MaxDigits> result_type;
result_type operator()(unused_type, unused_type) const
{
return result_type();
}
};
//]
template <typename T, unsigned Radix = 10, unsigned MinDigits = 1
, int MaxDigits = -1>
struct make_direct_int
{
typedef literal_int_parser<T, Radix, MinDigits, MaxDigits, 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 T, unsigned Radix = 10, unsigned MinDigits = 1
, int MaxDigits = -1>
struct make_literal_int
{
typedef literal_int_parser<T, Radix, MinDigits, MaxDigits> 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::lit, fusion::vector1<A0> >
, Modifiers, typename enable_if<is_same<A0, signed short> >::type>
: make_literal_int<signed short> {};
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::lit, fusion::vector1<A0> >
, Modifiers, typename enable_if<is_same<A0, signed> >::type>
: make_literal_int<signed> {};
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::lit, fusion::vector1<A0> >
, Modifiers, typename enable_if<is_same<A0, signed long> >::type>
: make_literal_int<signed long> {};
#ifdef BOOST_HAS_LONG_LONG
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::lit, fusion::vector1<A0> >
, Modifiers, typename enable_if<is_same<A0, boost::long_long_type> >::type>
: make_literal_int<boost::long_long_type> {};
#endif
///////////////////////////////////////////////////////////////////////////
template <typename T, unsigned Radix, unsigned MinDigits, int MaxDigits
, typename Modifiers>
struct make_primitive<
tag::int_parser<T, Radix, MinDigits, MaxDigits>
, Modifiers>
: make_int<T, Radix, MinDigits, MaxDigits> {};
template <typename T, unsigned Radix, unsigned MinDigits, int MaxDigits
, typename A0, typename Modifiers>
struct make_primitive<
terminal_ex<tag::int_parser<T, Radix, MinDigits, MaxDigits>
, fusion::vector1<A0> >, Modifiers>
: make_direct_int<T, Radix, MinDigits, MaxDigits> {};
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_short_primitive
template <typename Modifiers>
struct make_primitive<tag::short_, Modifiers>
: make_int<short> {};
//]
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::short_
, fusion::vector1<A0> > , Modifiers>
: make_direct_int<short> {};
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_int_primitive
template <typename Modifiers>
struct make_primitive<tag::int_, Modifiers>
: make_int<int> {};
//]
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::int_
, fusion::vector1<A0> > , Modifiers>
: make_direct_int<int> {};
///////////////////////////////////////////////////////////////////////////
//[primitive_parsers_long_primitive
template <typename Modifiers>
struct make_primitive<tag::long_, Modifiers>
: make_int<long> {};
//]
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::long_
, fusion::vector1<A0> > , Modifiers>
: make_direct_int<long> {};
///////////////////////////////////////////////////////////////////////////
#ifdef BOOST_HAS_LONG_LONG
//[primitive_parsers_long_long_primitive
template <typename Modifiers>
struct make_primitive<tag::long_long, Modifiers>
: make_int<boost::long_long_type> {};
//]
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::long_long
, fusion::vector1<A0> > , Modifiers>
: make_direct_int<boost::long_long_type> {};
#endif
}}}
#endif
