/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2001-2011 Hartmut Kaiser
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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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==============================================================================*/
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#if !defined(BOOST_SPIRIT_SIMPLE_TRACE_DECEMBER_06_2008_1102AM)
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#define BOOST_SPIRIT_SIMPLE_TRACE_DECEMBER_06_2008_1102AM
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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/qi/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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#include <boost/mpl/if.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/type_traits/is_convertible.hpp>
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#include <boost/spirit/home/support/attributes.hpp>
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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 qi
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{
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namespace detail
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{
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template<typename Char>
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inline void token_printer(std::ostream& o, Char c)
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{
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// allow to customize the token printer routine
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spirit::traits::print_token(o, c);
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}
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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(int n) const
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{
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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 Iterator>
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void print_some(
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char const* tag
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, int /*indent*/
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, Iterator first, Iterator const& last) const
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{
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print_indent(get_indent());
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BOOST_SPIRIT_DEBUG_OUT << '<' << tag << '>';
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int const n = BOOST_SPIRIT_DEBUG_PRINT_SOME;
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for (int i = 0; first != last && i != n && *first; ++i, ++first)
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detail::token_printer(BOOST_SPIRIT_DEBUG_OUT, *first);
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BOOST_SPIRIT_DEBUG_OUT << "</" << tag << '>' << std::endl;
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// $$$ FIXME convert invalid xml characters (e.g. '<') to valid
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// character entities. $$$
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}
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template <typename Iterator, typename Context, typename State>
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void operator()(
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Iterator const& first
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, Iterator const& last
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, Context const& context
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, State state
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, std::string const& rule_name) const
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{
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switch (state)
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{
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case pre_parse:
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print_indent(get_indent()++);
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BOOST_SPIRIT_DEBUG_OUT
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<< '<' << rule_name << '>'
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<< std::endl;
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print_some("try", get_indent(), first, last);
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break;
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case successful_parse:
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print_some("success", get_indent(), first, last);
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print_indent(get_indent());
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BOOST_SPIRIT_DEBUG_OUT
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<< "<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
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<< "</attributes>";
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if (!fusion::empty(context.locals))
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BOOST_SPIRIT_DEBUG_OUT
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<< "<locals>"
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<< context.locals
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<< "</locals>";
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BOOST_SPIRIT_DEBUG_OUT << std::endl;
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print_indent(--get_indent());
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BOOST_SPIRIT_DEBUG_OUT
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<< "</" << rule_name << '>'
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<< std::endl;
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break;
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case failed_parse:
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print_indent(get_indent());
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BOOST_SPIRIT_DEBUG_OUT << "<fail/>" << std::endl;
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print_indent(--get_indent());
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BOOST_SPIRIT_DEBUG_OUT
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<< "</" << rule_name << '>'
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<< 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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