Chris@16: //  Copyright (c) 2001-2011 Hartmut Kaiser
Chris@16: //  Copyright (c) 2001-2011 Joel de Guzman
Chris@16: // 
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #if !defined(BOOST_SPIRIT_KARMA_SIMPLE_TRACE_APR_21_2010_0155PM)
Chris@16: #define BOOST_SPIRIT_KARMA_SIMPLE_TRACE_APR_21_2010_0155PM
Chris@16: 
Chris@16: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/spirit/home/support/unused.hpp>
Chris@16: #include <boost/spirit/home/karma/nonterminal/debug_handler_state.hpp>
Chris@16: #include <boost/fusion/include/out.hpp>
Chris@16: #include <iostream>
Chris@16: 
Chris@16: //  The stream to use for debug output
Chris@16: #if !defined(BOOST_SPIRIT_DEBUG_OUT)
Chris@16: #define BOOST_SPIRIT_DEBUG_OUT std::cerr
Chris@16: #endif
Chris@16: 
Chris@16: //  number of tokens to print while debugging
Chris@16: #if !defined(BOOST_SPIRIT_DEBUG_PRINT_SOME)
Chris@16: #define BOOST_SPIRIT_DEBUG_PRINT_SOME 20
Chris@16: #endif
Chris@16: 
Chris@16: //  number of spaces to indent
Chris@16: #if !defined(BOOST_SPIRIT_DEBUG_INDENT)
Chris@16: #define BOOST_SPIRIT_DEBUG_INDENT 2
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost { namespace spirit { namespace karma
Chris@16: {
Chris@16:     struct simple_trace
Chris@16:     {
Chris@16:         int& get_indent() const
Chris@16:         {
Chris@16:             static int indent = 0;
Chris@16:             return indent;
Chris@16:         }
Chris@16: 
Chris@16:         void print_indent() const
Chris@16:         {
Chris@16:             int n = get_indent();
Chris@16:             n *= BOOST_SPIRIT_DEBUG_INDENT;
Chris@16:             for (int i = 0; i != n; ++i)
Chris@16:                 BOOST_SPIRIT_DEBUG_OUT << ' ';
Chris@16:         }
Chris@16: 
Chris@16:         template <typename Buffer>
Chris@16:         void print_some(char const* tag, Buffer const& buffer) const
Chris@16:         {
Chris@16:             print_indent();
Chris@16:             BOOST_SPIRIT_DEBUG_OUT << '<' << tag << '>' << std::flush;
Chris@16:             {
Chris@16:                 std::ostreambuf_iterator<char> out(BOOST_SPIRIT_DEBUG_OUT);
Chris@16:                 buffer.buffer_copy_to(out, BOOST_SPIRIT_DEBUG_PRINT_SOME);
Chris@16:             }
Chris@16:             BOOST_SPIRIT_DEBUG_OUT << "</" << tag << '>' << std::endl;
Chris@16:         }
Chris@16: 
Chris@16:         template <typename OutputIterator, typename Context, typename State
Chris@16:           , typename Buffer>
Chris@16:         void operator()(
Chris@16:             OutputIterator&, Context const& context
Chris@16:           , State state, std::string const& rule_name
Chris@16:           , Buffer const& buffer) const
Chris@16:         {
Chris@16:             switch (state)
Chris@16:             {
Chris@16:                 case pre_generate:
Chris@16:                     print_indent();
Chris@16:                     ++get_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT
Chris@16:                         << '<' << rule_name << '>' << std::endl;
Chris@16:                     print_indent();
Chris@16:                     ++get_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "<try>" << std::endl;;
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "<attributes>";
Chris@16:                     traits::print_attribute(
Chris@16:                         BOOST_SPIRIT_DEBUG_OUT,
Chris@16:                         context.attributes
Chris@16:                     );
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "</attributes>" << std::endl;
Chris@16:                     if (!fusion::empty(context.locals))
Chris@16:                     {
Chris@16:                         print_indent();
Chris@16:                         BOOST_SPIRIT_DEBUG_OUT
Chris@16:                             << "<locals>" << context.locals << "</locals>"
Chris@16:                             << std::endl;
Chris@16:                     }
Chris@16:                     --get_indent();
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "</try>" << std::endl;;
Chris@16:                     break;
Chris@16: 
Chris@16:                 case successful_generate:
Chris@16:                     print_indent();
Chris@16:                     ++get_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "<success>" << std::endl;
Chris@16:                     print_some("result", buffer);
Chris@16:                     if (!fusion::empty(context.locals))
Chris@16:                     {
Chris@16:                         print_indent();
Chris@16:                         BOOST_SPIRIT_DEBUG_OUT
Chris@16:                             << "<locals>" << context.locals << "</locals>"
Chris@16:                             << std::endl;
Chris@16:                     }
Chris@16:                     --get_indent();
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "</success>" << std::endl;
Chris@16:                     --get_indent();
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT 
Chris@16:                         << "</" << rule_name << '>' << std::endl;
Chris@16:                     break;
Chris@16: 
Chris@16:                 case failed_generate:
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT << "<fail/>" << std::endl;
Chris@16:                     --get_indent();
Chris@16:                     print_indent();
Chris@16:                     BOOST_SPIRIT_DEBUG_OUT 
Chris@16:                         << "</" << rule_name << '>' << std::endl;
Chris@16:                     break;
Chris@16:             }
Chris@16:         }
Chris@16:     };
Chris@16: }}}
Chris@16: 
Chris@16: #endif