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134 lines
4.5 KiB
134 lines
4.5 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_SIMPLE_TRACE_APR_21_2010_0155PM) |
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#define BOOST_SPIRIT_KARMA_SIMPLE_TRACE_APR_21_2010_0155PM |
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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/debug_handler_state.hpp> |
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#include <boost/fusion/include/out.hpp> |
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#include <iostream> |
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// The stream to use for debug output |
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#if !defined(BOOST_SPIRIT_DEBUG_OUT) |
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#define BOOST_SPIRIT_DEBUG_OUT std::cerr |
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#endif |
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// number of tokens to print while debugging |
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#if !defined(BOOST_SPIRIT_DEBUG_PRINT_SOME) |
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#define BOOST_SPIRIT_DEBUG_PRINT_SOME 20 |
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#endif |
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// number of spaces to indent |
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#if !defined(BOOST_SPIRIT_DEBUG_INDENT) |
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#define BOOST_SPIRIT_DEBUG_INDENT 2 |
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#endif |
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namespace boost { namespace spirit { namespace karma |
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{ |
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struct simple_trace |
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{ |
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int& get_indent() const |
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{ |
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static int indent = 0; |
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return indent; |
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} |
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void print_indent() const |
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{ |
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int n = get_indent(); |
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n *= BOOST_SPIRIT_DEBUG_INDENT; |
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for (int i = 0; i != n; ++i) |
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BOOST_SPIRIT_DEBUG_OUT << ' '; |
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} |
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template <typename Buffer> |
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void print_some(char const* tag, Buffer const& buffer) const |
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{ |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << '<' << tag << '>' << std::flush; |
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{ |
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std::ostreambuf_iterator<char> out(BOOST_SPIRIT_DEBUG_OUT); |
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buffer.buffer_copy_to(out, BOOST_SPIRIT_DEBUG_PRINT_SOME); |
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} |
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BOOST_SPIRIT_DEBUG_OUT << "</" << tag << '>' << std::endl; |
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} |
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template <typename OutputIterator, typename Context, typename State |
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, typename Buffer> |
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void operator()( |
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OutputIterator&, Context const& context |
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, State state, std::string const& rule_name |
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, Buffer const& buffer) const |
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{ |
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switch (state) |
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{ |
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case pre_generate: |
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print_indent(); |
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++get_indent(); |
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BOOST_SPIRIT_DEBUG_OUT |
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<< '<' << rule_name << '>' << std::endl; |
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print_indent(); |
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++get_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "<try>" << std::endl;; |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "<attributes>"; |
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traits::print_attribute( |
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BOOST_SPIRIT_DEBUG_OUT, |
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context.attributes |
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); |
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BOOST_SPIRIT_DEBUG_OUT << "</attributes>" << std::endl; |
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if (!fusion::empty(context.locals)) |
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{ |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT |
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<< "<locals>" << context.locals << "</locals>" |
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<< std::endl; |
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} |
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--get_indent(); |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "</try>" << std::endl;; |
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break; |
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case successful_generate: |
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print_indent(); |
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++get_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "<success>" << std::endl; |
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print_some("result", buffer); |
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if (!fusion::empty(context.locals)) |
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{ |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT |
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<< "<locals>" << context.locals << "</locals>" |
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<< std::endl; |
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} |
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--get_indent(); |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "</success>" << std::endl; |
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--get_indent(); |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT |
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<< "</" << rule_name << '>' << std::endl; |
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break; |
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case failed_generate: |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT << "<fail/>" << std::endl; |
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--get_indent(); |
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print_indent(); |
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BOOST_SPIRIT_DEBUG_OUT |
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<< "</" << rule_name << '>' << std::endl; |
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break; |
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} |
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} |
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}; |
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}}} |
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#endif
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