| // Copyright (c) 2001-2010 Hartmut Kaiser |
| // Copyright (c) 2001-2010 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& sink, 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 |