boost/spirit/home/qi/string/lit.hpp
/*=============================================================================
Copyright (c) 2001-2011 Joel de Guzman
Copyright (c) 2001-2011 Hartmut Kaiser
Copyright (c) 2010 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_LIT_APR_18_2006_1125PM)
#define BOOST_SPIRIT_LIT_APR_18_2006_1125PM
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/spirit/home/qi/domain.hpp>
#include <boost/spirit/home/qi/skip_over.hpp>
#include <boost/spirit/home/qi/detail/string_parse.hpp>
#include <boost/spirit/home/qi/parser.hpp>
#include <boost/spirit/home/qi/meta_compiler.hpp>
#include <boost/spirit/home/qi/auxiliary/lazy.hpp>
#include <boost/spirit/home/qi/detail/enable_lit.hpp>
#include <boost/spirit/home/support/info.hpp>
#include <boost/spirit/home/support/char_class.hpp>
#include <boost/spirit/home/support/modify.hpp>
#include <boost/spirit/home/support/unused.hpp>
#include <boost/spirit/home/support/common_terminals.hpp>
#include <boost/spirit/home/support/string_traits.hpp>
#include <boost/spirit/home/support/detail/get_encoding.hpp>
#include <boost/spirit/home/support/handles_container.hpp>
#include <boost/fusion/include/at.hpp>
#include <boost/fusion/include/value_at.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/if.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/utility/enable_if.hpp>
#include <string>
namespace boost { namespace spirit
{
///////////////////////////////////////////////////////////////////////////
// Enablers
///////////////////////////////////////////////////////////////////////////
template <typename T>
struct use_terminal<qi::domain, T
, typename enable_if<traits::is_string<T> >::type> // enables strings
: mpl::true_ {};
template <typename CharEncoding, typename A0>
struct use_terminal<qi::domain
, terminal_ex<
tag::char_code<tag::string, CharEncoding> // enables string(str)
, fusion::vector1<A0> >
> : traits::is_string<A0> {};
template <typename CharEncoding> // enables string(f)
struct use_lazy_terminal<
qi::domain
, tag::char_code<tag::string, CharEncoding>
, 1 /*arity*/
> : mpl::true_ {};
// enables lit(...)
template <typename A0>
struct use_terminal<qi::domain
, terminal_ex<tag::lit, fusion::vector1<A0> >
, typename enable_if<traits::is_string<A0> >::type>
: mpl::true_ {};
}}
namespace boost { namespace spirit { namespace qi
{
#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
using spirit::lit;
#endif
using spirit::lit_type;
///////////////////////////////////////////////////////////////////////////
// Parse for literal strings
///////////////////////////////////////////////////////////////////////////
template <typename String, bool no_attribute>
struct literal_string
: primitive_parser<literal_string<String, no_attribute> >
{
typedef typename
remove_const<typename traits::char_type_of<String>::type>::type
char_type;
typedef std::basic_string<char_type> string_type;
literal_string(typename add_reference<String>::type str_)
: str(str_)
{}
template <typename Context, typename Iterator>
struct attribute
{
typedef typename mpl::if_c<
no_attribute, unused_type, string_type>::type
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
{
qi::skip_over(first, last, skipper);
return detail::string_parse(str, first, last, attr_);
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("literal-string", str);
}
String str;
};
template <typename String, bool no_attribute>
struct no_case_literal_string
: primitive_parser<no_case_literal_string<String, no_attribute> >
{
typedef typename
remove_const<typename traits::char_type_of<String>::type>::type
char_type;
typedef std::basic_string<char_type> string_type;
template <typename CharEncoding>
no_case_literal_string(char_type const* in, CharEncoding encoding)
: str_lo(in)
, str_hi(in)
{
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
(void)encoding; // suppresses warning: C4100: 'encoding' : unreferenced formal parameter
#endif
typename string_type::iterator loi = str_lo.begin();
typename string_type::iterator hii = str_hi.begin();
for (; loi != str_lo.end(); ++loi, ++hii, ++in)
{
typedef typename CharEncoding::char_type encoded_char_type;
*loi = static_cast<char_type>(encoding.tolower(encoded_char_type(*loi)));
*hii = static_cast<char_type>(encoding.toupper(encoded_char_type(*hii)));
}
}
template <typename Context, typename Iterator>
struct attribute
{
typedef typename mpl::if_c<
no_attribute, unused_type, string_type>::type
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
{
qi::skip_over(first, last, skipper);
return detail::string_parse(str_lo, str_hi, first, last, attr_);
}
template <typename Context>
info what(Context& /*context*/) const
{
return info("no-case-literal-string", str_lo);
}
string_type str_lo, str_hi;
};
///////////////////////////////////////////////////////////////////////////
// Parser generators: make_xxx function (objects)
///////////////////////////////////////////////////////////////////////////
template <typename T, typename Modifiers>
struct make_primitive<T, Modifiers
, typename enable_if<traits::is_string<T> >::type>
{
typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
typedef typename add_const<T>::type const_string;
typedef typename mpl::if_<
no_case
, no_case_literal_string<const_string, true>
, literal_string<const_string, true> >::type
result_type;
result_type operator()(
typename add_reference<const_string>::type str, unused_type) const
{
return op(str, no_case());
}
template <typename String>
result_type op(String const& str, mpl::false_) const
{
return result_type(str);
}
template <typename String>
result_type op(String const& str, mpl::true_) const
{
typename spirit::detail::get_encoding<Modifiers,
spirit::char_encoding::standard>::type encoding;
return result_type(traits::get_c_string(str), encoding);
}
};
// lit("...")
template <typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<tag::lit, fusion::vector1<A0> >
, Modifiers
, typename enable_if<traits::is_string<A0> >::type>
{
typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
typedef typename add_const<A0>::type const_string;
typedef typename mpl::if_<
no_case
, no_case_literal_string<const_string, true>
, literal_string<const_string, true> >::type
result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, unused_type) const
{
return op(fusion::at_c<0>(term.args), no_case());
}
template <typename String>
result_type op(String const& str, mpl::false_) const
{
return result_type(str);
}
template <typename String>
result_type op(String const& str, mpl::true_) const
{
typedef typename traits::char_encoding_from_char<
typename traits::char_type_of<A0>::type>::type encoding_type;
typename spirit::detail::get_encoding<Modifiers,
encoding_type>::type encoding;
return result_type(traits::get_c_string(str), encoding);
}
};
///////////////////////////////////////////////////////////////////////////
// string("...")
template <typename CharEncoding, typename Modifiers, typename A0>
struct make_primitive<
terminal_ex<
tag::char_code<tag::string, CharEncoding>
, fusion::vector1<A0> >
, Modifiers>
{
typedef CharEncoding encoding;
typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
typedef typename add_const<A0>::type const_string;
typedef typename mpl::if_<
no_case
, no_case_literal_string<const_string, false>
, literal_string<const_string, false> >::type
result_type;
template <typename Terminal>
result_type operator()(Terminal const& term, unused_type) const
{
return op(fusion::at_c<0>(term.args), no_case());
}
template <typename String>
result_type op(String const& str, mpl::false_) const
{
return result_type(str);
}
template <typename String>
result_type op(String const& str, mpl::true_) const
{
return result_type(traits::get_c_string(str), encoding());
}
};
}}}
namespace boost { namespace spirit { namespace traits
{
///////////////////////////////////////////////////////////////////////////
template <typename String, bool no_attribute, typename Attribute
,typename Context, typename Iterator>
struct handles_container<qi::literal_string<String, no_attribute>
, Attribute, Context, Iterator>
: mpl::true_ {};
template <typename String, bool no_attribute, typename Attribute
, typename Context, typename Iterator>
struct handles_container<qi::no_case_literal_string<String, no_attribute>
, Attribute, Context, Iterator>
: mpl::true_ {};
}}}
#endif
