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- // Copyright (c) 2001-2011 Hartmut Kaiser
- // Copyright (c) 2001-2011 Joel de Guzman
- //
- // 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_SIMPLE_TRACE_APR_21_2010_0155PM)
- #define BOOST_SPIRIT_KARMA_SIMPLE_TRACE_APR_21_2010_0155PM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/support/unused.hpp>
- #include <boost/spirit/home/karma/nonterminal/debug_handler_state.hpp>
- #include <boost/fusion/include/out.hpp>
- #include <iostream>
- // The stream to use for debug output
- #if !defined(BOOST_SPIRIT_DEBUG_OUT)
- #define BOOST_SPIRIT_DEBUG_OUT std::cerr
- #endif
- // number of tokens to print while debugging
- #if !defined(BOOST_SPIRIT_DEBUG_PRINT_SOME)
- #define BOOST_SPIRIT_DEBUG_PRINT_SOME 20
- #endif
- // number of spaces to indent
- #if !defined(BOOST_SPIRIT_DEBUG_INDENT)
- #define BOOST_SPIRIT_DEBUG_INDENT 2
- #endif
- namespace boost { namespace spirit { namespace karma
- {
- struct simple_trace
- {
- int& get_indent() const
- {
- static int indent = 0;
- return indent;
- }
- void print_indent() const
- {
- int n = get_indent();
- n *= BOOST_SPIRIT_DEBUG_INDENT;
- for (int i = 0; i != n; ++i)
- BOOST_SPIRIT_DEBUG_OUT << ' ';
- }
- template <typename Buffer>
- void print_some(char const* tag, Buffer const& buffer) const
- {
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT << '<' << tag << '>' << std::flush;
- {
- std::ostreambuf_iterator<char> out(BOOST_SPIRIT_DEBUG_OUT);
- buffer.buffer_copy_to(out, BOOST_SPIRIT_DEBUG_PRINT_SOME);
- }
- BOOST_SPIRIT_DEBUG_OUT << "</" << tag << '>' << std::endl;
- }
- template <typename OutputIterator, typename Context, typename State
- , typename Buffer>
- void operator()(
- OutputIterator&, Context const& context
- , State state, std::string const& rule_name
- , Buffer const& buffer) const
- {
- switch (state)
- {
- case pre_generate:
- print_indent();
- ++get_indent();
- BOOST_SPIRIT_DEBUG_OUT
- << '<' << rule_name << '>' << std::endl;
- print_indent();
- ++get_indent();
- BOOST_SPIRIT_DEBUG_OUT << "<try>" << std::endl;;
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT << "<attributes>";
- traits::print_attribute(
- BOOST_SPIRIT_DEBUG_OUT,
- context.attributes
- );
- BOOST_SPIRIT_DEBUG_OUT << "</attributes>" << std::endl;
- if (!fusion::empty(context.locals))
- {
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT
- << "<locals>" << context.locals << "</locals>"
- << std::endl;
- }
- --get_indent();
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT << "</try>" << std::endl;;
- break;
- case successful_generate:
- print_indent();
- ++get_indent();
- BOOST_SPIRIT_DEBUG_OUT << "<success>" << std::endl;
- print_some("result", buffer);
- if (!fusion::empty(context.locals))
- {
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT
- << "<locals>" << context.locals << "</locals>"
- << std::endl;
- }
- --get_indent();
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT << "</success>" << std::endl;
- --get_indent();
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT
- << "</" << rule_name << '>' << std::endl;
- break;
- case failed_generate:
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT << "<fail/>" << std::endl;
- --get_indent();
- print_indent();
- BOOST_SPIRIT_DEBUG_OUT
- << "</" << rule_name << '>' << std::endl;
- break;
- }
- }
- };
- }}}
- #endif
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