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