283 lines
8.0 KiB
C++
283 lines
8.0 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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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_X3_LITERAL_STRING_APR_18_2006_1125PM)
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#define BOOST_SPIRIT_X3_LITERAL_STRING_APR_18_2006_1125PM
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#include <boost/spirit/home/x3/core/parser.hpp>
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#include <boost/spirit/home/x3/core/skip_over.hpp>
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#include <boost/spirit/home/x3/string/detail/string_parse.hpp>
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#include <boost/spirit/home/x3/support/no_case.hpp>
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#include <boost/spirit/home/x3/support/utility/utf8.hpp>
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#include <boost/spirit/home/support/char_encoding/ascii.hpp>
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#include <boost/spirit/home/support/char_encoding/standard.hpp>
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#include <boost/spirit/home/support/char_encoding/standard_wide.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/add_reference.hpp>
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#include <string>
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namespace boost { namespace spirit { namespace x3
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{
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template <typename String, typename Encoding,
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typename Attribute = std::basic_string<typename Encoding::char_type>>
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struct literal_string : parser<literal_string<String, Encoding, Attribute>>
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{
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typedef typename Encoding::char_type char_type;
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typedef Encoding encoding;
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typedef Attribute attribute_type;
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static bool const has_attribute =
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!is_same<unused_type, attribute_type>::value;
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static bool const handles_container = has_attribute;
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constexpr literal_string(typename add_reference< typename add_const<String>::type >::type str)
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: str(str)
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{}
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template <typename Iterator, typename Context, typename Attribute_>
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bool parse(Iterator& first, Iterator const& last
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, Context const& context, unused_type, Attribute_& attr) const
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{
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x3::skip_over(first, last, context);
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return detail::string_parse(str, first, last, attr, get_case_compare<encoding>(context));
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}
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String str;
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};
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namespace standard
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{
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constexpr literal_string<char const*, char_encoding::standard>
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string(char const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<char>, char_encoding::standard>
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string(std::basic_string<char> const& s)
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{
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return { s };
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}
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inline constexpr literal_string<char const*, char_encoding::standard, unused_type>
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lit(char const* s)
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{
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return { s };
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}
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template <typename Char>
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literal_string<std::basic_string<Char>, char_encoding::standard, unused_type>
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lit(std::basic_string<Char> const& s)
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{
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return { s };
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}
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}
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#ifndef BOOST_SPIRIT_NO_STANDARD_WIDE
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namespace standard_wide
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{
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constexpr literal_string<wchar_t const*, char_encoding::standard_wide>
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string(wchar_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<wchar_t>, char_encoding::standard_wide>
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string(std::basic_string<wchar_t> const& s)
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{
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return { s };
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}
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constexpr literal_string<wchar_t const*, char_encoding::standard_wide, unused_type>
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lit(wchar_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<wchar_t>, char_encoding::standard_wide, unused_type>
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lit(std::basic_string<wchar_t> const& s)
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{
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return { s };
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}
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}
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#endif
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#if defined(BOOST_SPIRIT_X3_UNICODE)
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namespace unicode
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{
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constexpr literal_string<char32_t const*, char_encoding::unicode>
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string(char32_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<char32_t>, char_encoding::unicode>
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string(std::basic_string<char32_t> const& s)
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{
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return { s };
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}
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constexpr literal_string<char32_t const*, char_encoding::unicode, unused_type>
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lit(char32_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<char32_t>, char_encoding::unicode, unused_type>
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lit(std::basic_string<char32_t> const& s)
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{
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return { s };
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}
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}
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#endif
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namespace ascii
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{
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constexpr literal_string<wchar_t const*, char_encoding::ascii>
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string(wchar_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<wchar_t>, char_encoding::ascii>
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string(std::basic_string<wchar_t> const& s)
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{
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return { s };
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}
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constexpr literal_string<char const*, char_encoding::ascii, unused_type>
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lit(char const* s)
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{
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return { s };
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}
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template <typename Char>
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literal_string<std::basic_string<Char>, char_encoding::ascii, unused_type>
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lit(std::basic_string<Char> const& s)
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{
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return { s };
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}
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}
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namespace iso8859_1
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{
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constexpr literal_string<wchar_t const*, char_encoding::iso8859_1>
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string(wchar_t const* s)
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{
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return { s };
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}
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inline literal_string<std::basic_string<wchar_t>, char_encoding::iso8859_1>
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string(std::basic_string<wchar_t> const& s)
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{
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return { s };
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}
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constexpr literal_string<char const*, char_encoding::iso8859_1, unused_type>
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lit(char const* s)
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{
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return { s };
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}
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template <typename Char>
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literal_string<std::basic_string<Char>, char_encoding::iso8859_1, unused_type>
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lit(std::basic_string<Char> const& s)
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{
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return { s };
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}
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}
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using standard::string;
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using standard::lit;
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#ifndef BOOST_SPIRIT_NO_STANDARD_WIDE
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using standard_wide::string;
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using standard_wide::lit;
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#endif
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namespace extension
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{
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template <int N>
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struct as_parser<char[N]>
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{
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typedef literal_string<
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char const*, char_encoding::standard, unused_type>
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type;
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typedef type value_type;
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static constexpr type call(char const* s)
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{
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return type(s);
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}
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};
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template <int N>
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struct as_parser<char const[N]> : as_parser<char[N]> {};
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#ifndef BOOST_SPIRIT_NO_STANDARD_WIDE
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template <int N>
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struct as_parser<wchar_t[N]>
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{
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typedef literal_string<
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wchar_t const*, char_encoding::standard_wide, unused_type>
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type;
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typedef type value_type;
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static constexpr type call(wchar_t const* s)
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{
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return type(s);
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}
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};
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template <int N>
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struct as_parser<wchar_t const[N]> : as_parser<wchar_t[N]> {};
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#endif
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template <>
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struct as_parser<char const*>
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{
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typedef literal_string<
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char const*, char_encoding::standard, unused_type>
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type;
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typedef type value_type;
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static constexpr type call(char const* s)
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{
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return type(s);
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}
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};
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template <typename Char>
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struct as_parser< std::basic_string<Char> >
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{
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typedef literal_string<
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Char const*, char_encoding::standard, unused_type>
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type;
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typedef type value_type;
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static type call(std::basic_string<Char> const& s)
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{
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return type(s.c_str());
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}
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};
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}
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template <typename String, typename Encoding, typename Attribute>
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struct get_info<literal_string<String, Encoding, Attribute>>
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{
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typedef std::string result_type;
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std::string operator()(literal_string<String, Encoding, Attribute> const& p) const
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{
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return '"' + to_utf8(p.str) + '"';
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}
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};
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}}}
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#endif
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