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131 lines
4.9 KiB
131 lines
4.9 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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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_DETAIL_GENERATE_FEB_20_2007_0959AM) |
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#define BOOST_SPIRIT_KARMA_DETAIL_GENERATE_FEB_20_2007_0959AM |
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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/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/delimit_flag.hpp> |
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#include <boost/spirit/home/karma/detail/output_iterator.hpp> |
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#include <boost/spirit/home/support/unused.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/mpl/bool.hpp> |
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namespace boost { namespace spirit { namespace karma { namespace detail |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename Expr, typename Enable = void> |
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struct generate_impl |
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{ |
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// Report invalid expression error as early as possible. |
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// If you got an error_invalid_expression error message here, |
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// then the expression (Expr) is not a valid spirit karma expression. |
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// Did you intend to use the auto_ facilities while forgetting to |
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// #include <boost/spirit/include/karma_auto.hpp>? |
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BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Expr); |
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}; |
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template <typename Expr> |
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struct generate_impl<Expr |
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, typename enable_if<traits::matches<karma::domain, Expr> >::type> |
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{ |
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template <typename OutputIterator> |
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static bool call( |
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OutputIterator& target_sink |
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, Expr const& expr) |
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{ |
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typedef traits::properties_of< |
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typename result_of::compile<karma::domain, Expr>::type |
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> properties; |
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// wrap user supplied iterator into our own output iterator |
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output_iterator<OutputIterator |
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, mpl::int_<properties::value> > sink(target_sink); |
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return compile<karma::domain>(expr). |
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generate(sink, unused, unused, unused); |
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} |
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template <typename OutputIterator, typename Properties> |
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static bool call( |
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detail::output_iterator<OutputIterator, Properties>& sink |
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, Expr const& expr) |
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{ |
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return compile<karma::domain>(expr). |
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generate(sink, unused, unused, unused); |
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} |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename Expr, typename Enable = void> |
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struct generate_delimited_impl |
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{ |
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// Report invalid expression error as early as possible. |
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// If you got an error_invalid_expression error message here, |
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// then the expression (Expr) is not a valid spirit karma expression. |
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// Did you intend to use the auto_ facilities while forgetting to |
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// #include <boost/spirit/include/karma_auto.hpp>? |
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BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Expr); |
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}; |
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template <typename Expr> |
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struct generate_delimited_impl<Expr |
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, typename enable_if<traits::matches<karma::domain, Expr> >::type> |
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{ |
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template <typename OutputIterator, typename Delimiter> |
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static bool call( |
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OutputIterator& target_sink |
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, Expr const& expr |
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, Delimiter const& delimiter |
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, BOOST_SCOPED_ENUM(delimit_flag) pre_delimit) |
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{ |
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typedef traits::properties_of< |
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typename result_of::compile<karma::domain, Expr>::type |
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> properties; |
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typedef traits::properties_of< |
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typename result_of::compile<karma::domain, Delimiter>::type |
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> delimiter_properties; |
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// wrap user supplied iterator into our own output iterator |
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detail::output_iterator<OutputIterator |
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, mpl::int_<properties::value | delimiter_properties::value> |
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> sink(target_sink); |
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return call(sink, expr, delimiter, pre_delimit); |
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} |
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template <typename OutputIterator, typename Properties |
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, typename Delimiter> |
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static bool call( |
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detail::output_iterator<OutputIterator, Properties>& sink |
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, Expr const& expr |
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, Delimiter const& delimiter |
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, BOOST_SCOPED_ENUM(delimit_flag) pre_delimit) |
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{ |
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// Report invalid expression error as early as possible. |
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// If you got an error_invalid_expression error message here, |
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// then the delimiter is not a valid spirit karma expression. |
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BOOST_SPIRIT_ASSERT_MATCH(karma::domain, Delimiter); |
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typename result_of::compile<karma::domain, Delimiter>::type const |
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delimiter_ = compile<karma::domain>(delimiter); |
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if (pre_delimit == delimit_flag::predelimit && |
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!karma::delimit_out(sink, delimiter_)) |
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{ |
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return false; |
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} |
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return compile<karma::domain>(expr). |
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generate(sink, unused, delimiter_, unused); |
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} |
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}; |
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}}}} |
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#endif |
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