Mercurial > hg > vamp-build-and-test
diff DEPENDENCIES/generic/include/boost/spirit/home/karma/directive/as.hpp @ 16:2665513ce2d3
Add boost headers
author | Chris Cannam |
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date | Tue, 05 Aug 2014 11:11:38 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DEPENDENCIES/generic/include/boost/spirit/home/karma/directive/as.hpp Tue Aug 05 11:11:38 2014 +0100 @@ -0,0 +1,165 @@ +// 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(SPIRIT_KARMA_AS_DEC_18_0510PM) +#define SPIRIT_KARMA_AS_DEC_18_0510PM + +#if defined(_MSC_VER) +#pragma once +#endif + +#include <boost/spirit/home/karma/meta_compiler.hpp> +#include <boost/spirit/home/karma/generator.hpp> +#include <boost/spirit/home/karma/domain.hpp> +#include <boost/spirit/home/karma/detail/output_iterator.hpp> +#include <boost/spirit/home/karma/detail/as.hpp> +#include <boost/spirit/home/support/unused.hpp> +#include <boost/spirit/home/support/info.hpp> +#include <boost/spirit/home/support/common_terminals.hpp> +#include <boost/spirit/home/support/has_semantic_action.hpp> +#include <boost/spirit/home/support/handles_container.hpp> +#include <boost/spirit/home/support/assert_msg.hpp> +#include <boost/spirit/home/support/container.hpp> +#include <boost/spirit/home/karma/detail/attributes.hpp> + +namespace boost { namespace spirit { namespace karma +{ + template <typename T> + struct as + : stateful_tag_type<T, tag::as> + { + BOOST_SPIRIT_ASSERT_MSG( + (traits::is_container<T>::type::value), + error_type_must_be_a_container, + (T)); + }; +}}} + +namespace boost { namespace spirit +{ + /////////////////////////////////////////////////////////////////////////// + // Enablers + /////////////////////////////////////////////////////////////////////////// + // enables as_string[...] + template <> + struct use_directive<karma::domain, tag::as_string> + : mpl::true_ {}; + + // enables as_wstring[...] + template <> + struct use_directive<karma::domain, tag::as_wstring> + : mpl::true_ {}; + + // enables as<T>[...] + template <typename T> + struct use_directive<karma::domain, tag::stateful_tag<T, tag::as> > + : mpl::true_ + {}; +}} + +namespace boost { namespace spirit { namespace karma +{ +#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS + using spirit::as_string; + using spirit::as_wstring; +#endif + using spirit::as_string_type; + using spirit::as_wstring_type; + + /////////////////////////////////////////////////////////////////////////// + // as_directive allows to hook custom conversions to string into the + // output generation process + /////////////////////////////////////////////////////////////////////////// + template <typename Subject, typename T> + struct as_directive + : unary_generator<as_directive<Subject, T> > + { + typedef Subject subject_type; + typedef typename subject_type::properties properties; + + as_directive(Subject const& subject) + : subject(subject) {} + + template <typename Context, typename Iterator> + struct attribute + { + typedef T type; + }; + + template <typename OutputIterator, typename Context, typename Delimiter + , typename Attribute> + bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d + , Attribute const& attr) const + { + if (!traits::valid_as<T>(attr)) + return false; + + return subject.generate(sink, ctx, d, traits::as<T>(attr)) && + karma::delimit_out(sink, d); // always do post-delimiting + } + + template <typename Context> + info what(Context& context) const + { + return info("as", subject.what(context)); + } + + Subject subject; + }; + + /////////////////////////////////////////////////////////////////////////// + // Generator generators: make_xxx function (objects) + /////////////////////////////////////////////////////////////////////////// + template <typename Subject, typename Modifiers> + struct make_directive<tag::as_string, Subject, Modifiers> + { + typedef as_directive<Subject, std::string> result_type; + result_type operator()(unused_type, Subject const& subject + , unused_type) const + { + return result_type(subject); + } + }; + + template <typename Subject, typename Modifiers> + struct make_directive<tag::as_wstring, Subject, Modifiers> + { + typedef as_directive<Subject, std::basic_string<wchar_t> > result_type; + result_type operator()(unused_type, Subject const& subject + , unused_type) const + { + return result_type(subject); + } + }; + + template <typename T, typename Subject, typename Modifiers> + struct make_directive<tag::stateful_tag<T, tag::as>, Subject, Modifiers> + { + typedef as_directive<Subject, T> result_type; + result_type operator()(unused_type, Subject const& subject + , unused_type) const + { + return result_type(subject); + } + }; +}}} + +namespace boost { namespace spirit { namespace traits +{ + /////////////////////////////////////////////////////////////////////////// + template <typename Subject, typename T> + struct has_semantic_action<karma::as_directive<Subject, T> > + : unary_has_semantic_action<Subject> {}; + + /////////////////////////////////////////////////////////////////////////// + template <typename Subject, typename T, typename Attribute + , typename Context, typename Iterator> + struct handles_container<karma::as_directive<Subject, T>, Attribute + , Context, Iterator> + : mpl::false_ {}; // always dereference attribute if used in sequences +}}} + +#endif