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135 lines
4.5 KiB
135 lines
4.5 KiB
/*============================================================================= |
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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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