// 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_KARMA_LIT_FEB_22_2007_0534PM) #define BOOST_SPIRIT_KARMA_LIT_FEB_22_2007_0534PM #if defined(_MSC_VER) #pragma once #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /////////////////////////////////////////////////////////////////////////////// namespace boost { namespace spirit { /////////////////////////////////////////////////////////////////////////// // Enablers /////////////////////////////////////////////////////////////////////////// template struct use_terminal > // enables string : mpl::true_ {}; template struct use_terminal >::type> // enables string literals : mpl::true_ {}; template struct use_terminal // enables string(str) , fusion::vector1 > > : traits::is_string {}; template // enables string(f) struct use_lazy_terminal< karma::domain , tag::char_code , 1 /*arity*/ > : mpl::true_ {}; // enables lit(str) template struct use_terminal > , typename enable_if >::type> : mpl::true_ {}; }} /////////////////////////////////////////////////////////////////////////////// namespace boost { namespace spirit { namespace karma { #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS using spirit::lit; #endif using spirit::lit_type; /////////////////////////////////////////////////////////////////////////// // generate literal strings from a given parameter /////////////////////////////////////////////////////////////////////////// template struct any_string : primitive_generator > { typedef typename CharEncoding::char_type char_type; typedef CharEncoding char_encoding; template struct attribute { typedef std::basic_string type; }; // lit has an attached attribute template static bool generate(OutputIterator& sink, Context& context, Delimiter const& d, Attribute const& attr) { if (!traits::has_optional_value(attr)) return false; typedef typename attribute::type attribute_type; return karma::detail::string_generate(sink , traits::extract_from(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 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 static info what(Context const& /*context*/) { return info("any-string"); } }; /////////////////////////////////////////////////////////////////////////// // generate literal strings /////////////////////////////////////////////////////////////////////////// template struct literal_string : primitive_generator > { typedef CharEncoding char_encoding; typedef typename remove_const::type>::type char_type; typedef std::basic_string string_type; template struct attribute : mpl::if_c {}; literal_string(typename add_reference::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::type attribute_type; typedef typename spirit::result_of::extract_from::type extracted_string_type; using spirit::traits::get_c_string; if (!detail::string_compare( get_c_string( traits::extract_from(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 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 info what(Context const& /*context*/) const { return info("literal-string", str_); } string_type str_; }; /////////////////////////////////////////////////////////////////////////// // Generator generators: make_xxx function (objects) /////////////////////////////////////////////////////////////////////////// // string template struct make_primitive< tag::char_code , Modifiers> { static bool const lower = has_modifier >::value; static bool const upper = has_modifier >::value; typedef any_string< typename spirit::detail::get_encoding_with_case< Modifiers, CharEncoding, lower || upper>::type , typename detail::get_casetag::type > result_type; result_type operator()(unused_type, unused_type) const { return result_type(); } }; // string literal template struct make_primitive >::type> { static bool const lower = has_modifier >::value; static bool const upper = has_modifier >::value; typedef typename add_const::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::type , true > result_type; result_type operator()( typename add_reference::type str, unused_type) const { return result_type(str); } }; /////////////////////////////////////////////////////////////////////////// namespace detail { template struct make_string_direct { static bool const lower = has_modifier >::value; static bool const upper = has_modifier >::value; typedef typename add_const::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::type , no_attribute > result_type; template result_type operator()(Terminal const& term, unused_type) const { return result_type(fusion::at_c<0>(term.args)); } }; } // string("..."), lit("...") template struct make_primitive< terminal_ex< tag::char_code , fusion::vector1 > , Modifiers> : detail::make_string_direct {}; template struct make_primitive< terminal_ex > , Modifiers , typename enable_if >::type> : detail::make_string_direct< typename traits::char_encoding_from_char< typename traits::char_type_of::type>::type , Modifiers, A0, true> {}; }}} // namespace boost::spirit::karma namespace boost { namespace spirit { namespace traits { /////////////////////////////////////////////////////////////////////////// template struct handles_container, Attribute , Context, Iterator> : mpl::false_ {}; template struct handles_container, Attribute, Context, Iterator> : mpl::false_ {}; }}} #endif