| // 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_LIT_FEB_22_2007_0534PM) |
| #define BOOST_SPIRIT_KARMA_LIT_FEB_22_2007_0534PM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #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/domain.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/detail/string_generate.hpp> |
| #include <boost/spirit/home/karma/detail/string_compare.hpp> |
| #include <boost/fusion/include/at.hpp> |
| #include <boost/fusion/include/vector.hpp> |
| #include <boost/fusion/include/cons.hpp> |
| #include <boost/mpl/if.hpp> |
| #include <boost/mpl/or.hpp> |
| #include <boost/mpl/assert.hpp> |
| #include <boost/mpl/bool.hpp> |
| #include <string> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Enablers |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename CharEncoding> |
| struct use_terminal<karma::domain |
| , tag::char_code<tag::string, CharEncoding> > // enables string |
| : mpl::true_ {}; |
| |
| template <typename T> |
| struct use_terminal<karma::domain, T |
| , typename enable_if<traits::is_string<T> >::type> // enables string literals |
| : mpl::true_ {}; |
| |
| template <typename CharEncoding, typename A0> |
| struct use_terminal<karma::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< |
| karma::domain |
| , tag::char_code<tag::string, CharEncoding> |
| , 1 /*arity*/ |
| > : mpl::true_ {}; |
| |
| }} |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { namespace spirit { namespace karma |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // generate literal strings from a given parameter |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename CharEncoding, typename Tag> |
| struct any_string |
| : primitive_generator<any_string<CharEncoding, Tag> > |
| { |
| typedef typename CharEncoding::char_type char_type; |
| typedef CharEncoding char_encoding; |
| |
| template <typename Context, typename Unused = unused_type> |
| struct attribute |
| { |
| typedef std::basic_string<char_type> type; |
| }; |
| |
| // lit has an attached attribute |
| 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; |
| |
| typedef typename attribute<Context>::type attribute_type; |
| return |
| karma::detail::string_generate(sink |
| , traits::extract_from<attribute_type>(attr, context) |
| , char_encoding(), Tag()) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| // this lit 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 const&) |
| { |
| // It is not possible (doesn't make sense) to use string without |
| // providing any attribute, as the generator doesn't 'know' what |
| // character to output. The following assertion fires if this |
| // situation is detected in your code. |
| BOOST_SPIRIT_ASSERT_MSG(false, string_not_usable_without_attribute, ()); |
| return false; |
| } |
| |
| template <typename Context> |
| static info what(Context const& /*context*/) |
| { |
| return info("any-string"); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // generate literal strings |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename String, typename CharEncoding, typename Tag, bool no_attribute> |
| struct literal_string |
| : primitive_generator<literal_string<String, CharEncoding, Tag, no_attribute> > |
| { |
| typedef CharEncoding char_encoding; |
| typedef typename |
| remove_const<typename traits::char_type_of<String>::type>::type |
| char_type; |
| typedef std::basic_string<char_type> string_type; |
| |
| template <typename Context, typename Unused = unused_type> |
| struct attribute |
| : mpl::if_c<no_attribute, unused_type, string_type> |
| {}; |
| |
| literal_string(typename add_reference<String>::type str) |
| : str_(str) |
| {} |
| |
| // A string("...") 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)) |
| return false; |
| |
| // fail if attribute isn't matched by immediate literal |
| typedef typename attribute<Context>::type attribute_type; |
| |
| using spirit::traits::get_c_string; |
| if (!detail::string_compare( |
| get_c_string(traits::extract_from<attribute_type>(attr, context)) |
| , get_c_string(str_), char_encoding(), Tag())) |
| { |
| return false; |
| } |
| return detail::string_generate(sink, str_, char_encoding(), Tag()) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| // A string("...") 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 detail::string_generate(sink, str_, char_encoding(), Tag()) && |
| karma::delimit_out(sink, d); // always do post-delimiting |
| } |
| |
| template <typename Context> |
| info what(Context const& /*context*/) const |
| { |
| return info("literal-string", str_); |
| } |
| |
| string_type str_; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Generator generators: make_xxx function (objects) |
| /////////////////////////////////////////////////////////////////////////// |
| |
| // string |
| template <typename CharEncoding, typename Modifiers> |
| struct make_primitive< |
| tag::char_code<tag::string, CharEncoding> |
| , Modifiers> |
| { |
| 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_string< |
| typename spirit::detail::get_encoding_with_case< |
| Modifiers, CharEncoding, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| > result_type; |
| |
| result_type operator()(unused_type, unused_type) const |
| { |
| return result_type(); |
| } |
| }; |
| |
| // string literal |
| template <typename T, typename Modifiers> |
| struct make_primitive<T, Modifiers |
| , typename enable_if<traits::is_string<T> >::type> |
| { |
| 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 typename add_const<T>::type const_string; |
| typedef literal_string< |
| const_string |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , true |
| > result_type; |
| |
| result_type operator()( |
| typename add_reference<const_string>::type str, unused_type) const |
| { |
| return result_type(str); |
| } |
| }; |
| |
| template <typename CharEncoding, typename Modifiers, typename A0> |
| struct make_primitive< |
| terminal_ex< |
| tag::char_code<tag::string, CharEncoding> |
| , fusion::vector1<A0> > |
| , Modifiers> |
| { |
| 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 typename add_const<A0>::type const_string; |
| typedef literal_string< |
| const_string |
| , typename spirit::detail::get_encoding_with_case< |
| Modifiers, unused_type, lower || upper>::type |
| , typename detail::get_casetag<Modifiers, lower || upper>::type |
| , false |
| > result_type; |
| |
| template <typename Terminal> |
| result_type operator()(Terminal const& term, unused_type) const |
| { |
| return result_type(fusion::at_c<0>(term.args)); |
| } |
| }; |
| |
| }}} // namespace boost::spirit::karma |
| |
| #endif |