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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Copyright (c) 2001-2011 Hartmut Kaiser
- 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_SIMPLE_TRACE_DECEMBER_06_2008_1102AM)
- #define BOOST_SPIRIT_SIMPLE_TRACE_DECEMBER_06_2008_1102AM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/support/unused.hpp>
- #include <boost/spirit/home/qi/nonterminal/debug_handler_state.hpp>
- #include <boost/fusion/include/out.hpp>
- #include <iostream>
- #include <boost/mpl/if.hpp>
- #include <boost/mpl/and.hpp>
- #include <boost/type_traits/is_convertible.hpp>
- #include <boost/spirit/home/support/attributes.hpp>
- // 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 qi
- {
- namespace detail
- {
- template<typename Char>
- inline void token_printer(std::ostream& o, Char c)
- {
- // allow to customize the token printer routine
- spirit::traits::print_token(o, c);
- }
- }
- struct simple_trace
- {
- int& get_indent() const
- {
- static int indent = 0;
- return indent;
- }
- void print_indent(int n) const
- {
- n *= BOOST_SPIRIT_DEBUG_INDENT;
- for (int i = 0; i != n; ++i)
- BOOST_SPIRIT_DEBUG_OUT << ' ';
- }
- template <typename Iterator>
- void print_some(
- char const* tag
- , int /*indent*/
- , Iterator first, Iterator const& last) const
- {
- print_indent(get_indent());
- BOOST_SPIRIT_DEBUG_OUT << '<' << tag << '>';
- int const n = BOOST_SPIRIT_DEBUG_PRINT_SOME;
- for (int i = 0; first != last && i != n && *first; ++i, ++first)
- detail::token_printer(BOOST_SPIRIT_DEBUG_OUT, *first);
- BOOST_SPIRIT_DEBUG_OUT << "</" << tag << '>' << std::endl;
- // $$$ FIXME convert invalid xml characters (e.g. '<') to valid
- // character entities. $$$
- }
- template <typename Iterator, typename Context, typename State>
- void operator()(
- Iterator const& first
- , Iterator const& last
- , Context const& context
- , State state
- , std::string const& rule_name) const
- {
- switch (state)
- {
- case pre_parse:
- print_indent(get_indent()++);
- BOOST_SPIRIT_DEBUG_OUT
- << '<' << rule_name << '>'
- << std::endl;
- print_some("try", get_indent(), first, last);
- break;
- case successful_parse:
- print_some("success", get_indent(), first, last);
- print_indent(get_indent());
- BOOST_SPIRIT_DEBUG_OUT
- << "<attributes>";
- traits::print_attribute(
- BOOST_SPIRIT_DEBUG_OUT,
- context.attributes
- );
- BOOST_SPIRIT_DEBUG_OUT
- << "</attributes>";
- if (!fusion::empty(context.locals))
- BOOST_SPIRIT_DEBUG_OUT
- << "<locals>"
- << context.locals
- << "</locals>";
- BOOST_SPIRIT_DEBUG_OUT << std::endl;
- print_indent(--get_indent());
- BOOST_SPIRIT_DEBUG_OUT
- << "</" << rule_name << '>'
- << std::endl;
- break;
- case failed_parse:
- print_indent(get_indent());
- BOOST_SPIRIT_DEBUG_OUT << "<fail/>" << std::endl;
- print_indent(--get_indent());
- BOOST_SPIRIT_DEBUG_OUT
- << "</" << rule_name << '>'
- << std::endl;
- break;
- }
- }
- };
- }}}
- #endif
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