// 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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