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334 lines
12 KiB
334 lines
12 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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// Copyright (c) 2010 Bryce Lelbach |
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// |
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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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#if !defined(BOOST_SPIRIT_KARMA_LIT_FEB_22_2007_0534PM) |
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#define BOOST_SPIRIT_KARMA_LIT_FEB_22_2007_0534PM |
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#if defined(_MSC_VER) |
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#pragma once |
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#endif |
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#include <boost/spirit/home/support/common_terminals.hpp> |
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#include <boost/spirit/home/support/string_traits.hpp> |
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#include <boost/spirit/home/support/info.hpp> |
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#include <boost/spirit/home/support/char_class.hpp> |
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#include <boost/spirit/home/support/container.hpp> |
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#include <boost/spirit/home/support/handles_container.hpp> |
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#include <boost/spirit/home/support/detail/get_encoding.hpp> |
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#include <boost/spirit/home/karma/domain.hpp> |
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#include <boost/spirit/home/karma/meta_compiler.hpp> |
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#include <boost/spirit/home/karma/delimit_out.hpp> |
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#include <boost/spirit/home/karma/auxiliary/lazy.hpp> |
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#include <boost/spirit/home/karma/detail/get_casetag.hpp> |
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#include <boost/spirit/home/karma/detail/extract_from.hpp> |
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#include <boost/spirit/home/karma/detail/string_generate.hpp> |
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#include <boost/spirit/home/karma/detail/string_compare.hpp> |
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#include <boost/spirit/home/karma/detail/enable_lit.hpp> |
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#include <boost/fusion/include/at.hpp> |
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#include <boost/fusion/include/vector.hpp> |
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#include <boost/fusion/include/cons.hpp> |
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#include <boost/mpl/if.hpp> |
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#include <boost/mpl/or.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/utility/enable_if.hpp> |
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#include <string> |
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/////////////////////////////////////////////////////////////////////////////// |
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namespace boost { namespace spirit |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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// Enablers |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename CharEncoding> |
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struct use_terminal<karma::domain |
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, tag::char_code<tag::string, CharEncoding> > // enables string |
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: mpl::true_ {}; |
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template <typename T> |
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struct use_terminal<karma::domain, T |
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, typename enable_if<traits::is_string<T> >::type> // enables string literals |
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: mpl::true_ {}; |
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template <typename CharEncoding, typename A0> |
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struct use_terminal<karma::domain |
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, terminal_ex< |
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tag::char_code<tag::string, CharEncoding> // enables string(str) |
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, fusion::vector1<A0> > |
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> : traits::is_string<A0> {}; |
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template <typename CharEncoding> // enables string(f) |
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struct use_lazy_terminal< |
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karma::domain |
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, tag::char_code<tag::string, CharEncoding> |
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, 1 /*arity*/ |
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> : mpl::true_ {}; |
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// enables lit(str) |
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template <typename A0> |
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struct use_terminal<karma::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<traits::is_string<A0> >::type> |
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: mpl::true_ {}; |
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}} |
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/////////////////////////////////////////////////////////////////////////////// |
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namespace boost { namespace spirit { namespace karma |
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{ |
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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS |
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using spirit::lit; |
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#endif |
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using spirit::lit_type; |
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/////////////////////////////////////////////////////////////////////////// |
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// generate literal strings from a given parameter |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename CharEncoding, typename Tag> |
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struct any_string |
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: primitive_generator<any_string<CharEncoding, Tag> > |
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{ |
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typedef typename CharEncoding::char_type char_type; |
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typedef CharEncoding char_encoding; |
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template <typename Context, typename Unused = unused_type> |
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struct attribute |
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{ |
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typedef std::basic_string<char_type> type; |
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}; |
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// lit has an attached attribute |
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template <typename OutputIterator, typename Context, typename Delimiter |
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, typename Attribute> |
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static bool |
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generate(OutputIterator& sink, Context& context, Delimiter const& d, |
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Attribute const& attr) |
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{ |
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if (!traits::has_optional_value(attr)) |
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return false; |
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typedef typename attribute<Context>::type attribute_type; |
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return |
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karma::detail::string_generate(sink |
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, traits::extract_from<attribute_type>(attr, context) |
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, char_encoding(), Tag()) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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// this lit has no attribute attached, it needs to have been |
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// initialized from a direct literal |
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template <typename OutputIterator, typename Context, typename Delimiter> |
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static bool generate(OutputIterator&, Context&, Delimiter const&, |
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unused_type const&) |
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{ |
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// It is not possible (doesn't make sense) to use string without |
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// providing any attribute, as the generator doesn't 'know' what |
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// character to output. The following assertion fires if this |
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// situation is detected in your code. |
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BOOST_SPIRIT_ASSERT_MSG(false, string_not_usable_without_attribute, ()); |
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return false; |
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} |
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template <typename Context> |
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static info what(Context const& /*context*/) |
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{ |
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return info("any-string"); |
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} |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// generate literal strings |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename String, typename CharEncoding, typename Tag, bool no_attribute> |
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struct literal_string |
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: primitive_generator<literal_string<String, CharEncoding, Tag, no_attribute> > |
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{ |
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typedef CharEncoding char_encoding; |
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typedef typename |
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remove_const<typename traits::char_type_of<String>::type>::type |
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char_type; |
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typedef std::basic_string<char_type> string_type; |
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template <typename Context, typename Unused = unused_type> |
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struct attribute |
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: mpl::if_c<no_attribute, unused_type, string_type> |
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{}; |
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literal_string(typename add_reference<String>::type str) |
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: str_(str) |
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{} |
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// A string("...") which additionally has an associated attribute emits |
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// its immediate literal only if it matches the attribute, otherwise |
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// it fails. |
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template < |
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typename OutputIterator, typename Context, typename Delimiter |
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, typename Attribute> |
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bool generate(OutputIterator& sink, Context& context |
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, Delimiter const& d, Attribute const& attr) const |
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{ |
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if (!traits::has_optional_value(attr)) |
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return false; |
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// fail if attribute isn't matched by immediate literal |
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typedef typename attribute<Context>::type attribute_type; |
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typedef typename spirit::result_of::extract_from<attribute_type, Attribute>::type |
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extracted_string_type; |
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using spirit::traits::get_c_string; |
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if (!detail::string_compare( |
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get_c_string( |
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traits::extract_from<attribute_type>(attr, context)) |
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, get_c_string(str_), char_encoding(), Tag())) |
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{ |
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return false; |
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} |
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return detail::string_generate(sink, str_, char_encoding(), Tag()) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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// A string("...") without any associated attribute just emits its |
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// immediate literal |
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template <typename OutputIterator, typename Context, typename Delimiter> |
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bool generate(OutputIterator& sink, Context&, Delimiter const& d |
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, unused_type) const |
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{ |
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return detail::string_generate(sink, str_, char_encoding(), Tag()) && |
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karma::delimit_out(sink, d); // always do post-delimiting |
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} |
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template <typename Context> |
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info what(Context const& /*context*/) const |
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{ |
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return info("literal-string", str_); |
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} |
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string_type str_; |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// Generator generators: make_xxx function (objects) |
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/////////////////////////////////////////////////////////////////////////// |
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// string |
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template <typename CharEncoding, typename Modifiers> |
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struct make_primitive< |
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tag::char_code<tag::string, CharEncoding> |
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, Modifiers> |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef any_string< |
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typename spirit::detail::get_encoding_with_case< |
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Modifiers, CharEncoding, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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> result_type; |
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result_type operator()(unused_type, unused_type) const |
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{ |
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return result_type(); |
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} |
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}; |
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// string literal |
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template <typename T, typename Modifiers> |
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struct make_primitive<T, Modifiers |
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, typename enable_if<traits::is_string<T> >::type> |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef typename add_const<T>::type const_string; |
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typedef literal_string< |
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const_string |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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, true |
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> result_type; |
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result_type operator()( |
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typename add_reference<const_string>::type str, unused_type) const |
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{ |
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return result_type(str); |
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} |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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namespace detail |
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{ |
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template <typename CharEncoding, typename Modifiers, typename A0 |
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, bool no_attribute> |
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struct make_string_direct |
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{ |
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static bool const lower = |
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has_modifier<Modifiers, tag::char_code_base<tag::lower> >::value; |
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static bool const upper = |
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has_modifier<Modifiers, tag::char_code_base<tag::upper> >::value; |
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typedef typename add_const<A0>::type const_string; |
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typedef literal_string< |
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const_string |
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, typename spirit::detail::get_encoding_with_case< |
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Modifiers, unused_type, lower || upper>::type |
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, typename detail::get_casetag<Modifiers, lower || upper>::type |
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, no_attribute |
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> result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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return result_type(fusion::at_c<0>(term.args)); |
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} |
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}; |
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} |
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// string("..."), lit("...") |
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template <typename CharEncoding, typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex< |
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tag::char_code<tag::string, CharEncoding> |
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, fusion::vector1<A0> > |
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, Modifiers> |
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: detail::make_string_direct<CharEncoding, Modifiers, A0, false> |
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{}; |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::lit, fusion::vector1<A0> > |
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, Modifiers |
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, typename enable_if<traits::is_string<A0> >::type> |
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: detail::make_string_direct< |
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typename traits::char_encoding_from_char< |
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typename traits::char_type_of<A0>::type>::type |
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, Modifiers, A0, true> |
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{}; |
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}}} // namespace boost::spirit::karma |
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namespace boost { namespace spirit { namespace traits |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename CharEncoding, typename Tag, typename Attribute |
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, typename Context, typename Iterator> |
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struct handles_container<karma::any_string<CharEncoding, Tag>, Attribute |
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, Context, Iterator> |
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: mpl::false_ {}; |
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template <typename String, typename CharEncoding, typename Tag |
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, bool no_attribute, typename Attribute, typename Context |
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, typename Iterator> |
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struct handles_container<karma::literal_string<String, CharEncoding, Tag |
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, no_attribute>, Attribute, Context, Iterator> |
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: mpl::false_ {}; |
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}}} |
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#endif
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