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134 lines
4.2 KiB
134 lines
4.2 KiB
// Copyright (c) 2001-2011 Hartmut Kaiser |
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// Copyright (c) 2001-2011 Joel de Guzman |
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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_DEBUG_HANDLER_APR_21_2010_0148PM) |
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#define BOOST_SPIRIT_KARMA_DEBUG_HANDLER_APR_21_2010_0148PM |
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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/unused.hpp> |
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#include <boost/spirit/home/karma/nonterminal/rule.hpp> |
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#include <boost/spirit/home/karma/nonterminal/debug_handler_state.hpp> |
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#include <boost/function.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/out.hpp> |
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#include <iostream> |
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namespace boost { namespace spirit { namespace karma |
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{ |
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template < |
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typename OutputIterator, typename Context, typename Delimiter |
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, typename Properties, typename F> |
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struct debug_handler |
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{ |
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typedef detail::output_iterator<OutputIterator, Properties> |
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output_iterator; |
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typedef detail::enable_buffering<output_iterator> buffer_type; |
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typedef function<bool(output_iterator&, Context&, Delimiter const&)> |
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function_type; |
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debug_handler(function_type subject, F f, std::string const& rule_name) |
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: subject(subject) |
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, f(f) |
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, rule_name(rule_name) |
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{} |
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bool operator()(output_iterator& sink, Context& context |
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, Delimiter const& delim) const |
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{ |
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buffer_type buffer(sink); |
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bool r = false; |
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f (sink, context, pre_generate, rule_name, buffer); |
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{ |
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detail::disable_counting<output_iterator> nocount(sink); |
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r = subject(sink, context, delim); |
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} |
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if (r) |
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{ |
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f (sink, context, successful_generate, rule_name, buffer); |
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buffer.buffer_copy(); |
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return true; |
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} |
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f (sink, context, failed_generate, rule_name, buffer); |
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return false; |
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} |
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function_type subject; |
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F f; |
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std::string rule_name; |
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}; |
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template <typename OutputIterator |
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, typename T1, typename T2, typename T3, typename T4, typename F> |
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void debug(rule<OutputIterator, T1, T2, T3, T4>& r, F f) |
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{ |
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typedef rule<OutputIterator, T1, T2, T3, T4> rule_type; |
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typedef |
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debug_handler< |
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OutputIterator |
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, typename rule_type::context_type |
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, typename rule_type::delimiter_type |
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, typename rule_type::properties |
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, F> |
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debug_handler; |
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r.f = debug_handler(r.f, f, r.name()); |
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} |
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struct simple_trace; |
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namespace detail |
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{ |
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// This class provides an extra level of indirection through a |
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// template to produce the simple_trace type. This way, the use |
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// of simple_trace below is hidden behind a dependent type, so |
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// that compilers eagerly type-checking template definitions |
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// won't complain that simple_trace is incomplete. |
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template<typename T> |
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struct get_simple_trace |
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{ |
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typedef simple_trace type; |
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}; |
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} |
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template <typename OutputIterator |
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, typename T1, typename T2, typename T3, typename T4> |
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void debug(rule<OutputIterator, T1, T2, T3, T4>& r) |
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{ |
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typedef rule<OutputIterator, T1, T2, T3, T4> rule_type; |
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typedef |
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debug_handler< |
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OutputIterator |
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, typename rule_type::context_type |
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, typename rule_type::delimiter_type |
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, typename rule_type::properties |
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, simple_trace> |
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debug_handler; |
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typedef typename karma::detail::get_simple_trace<OutputIterator>::type |
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trace; |
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r.f = debug_handler(r.f, trace(), r.name()); |
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} |
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}}} |
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/////////////////////////////////////////////////////////////////////////////// |
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// Utility macro for easy enabling of rule and grammar debugging |
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#if !defined(BOOST_SPIRIT_DEBUG_NODE) |
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#if defined(BOOST_SPIRIT_KARMA_DEBUG) |
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#define BOOST_SPIRIT_DEBUG_NODE(r) r.name(#r); debug(r) |
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#else |
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#define BOOST_SPIRIT_DEBUG_NODE(r) r.name(#r); |
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#endif |
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#endif |
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#endif
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