72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
/*=============================================================================
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Boost.Wave: A Standard compliant C++ preprocessor library
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Sample: Collect token statistics from the analysed files
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http://www.boost.org/
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Copyright (c) 2001-2010 Hartmut Kaiser. Distributed under the Boost
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Software License, Version 1.0. (See accompanying file
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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(COLLECT_TOKEN_STATISTICS_VERSION_HPP)
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#define COLLECT_TOKEN_STATISTICS_VERSION_HPP
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#include <algorithm>
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#include <map>
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#include <boost/assert.hpp>
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#include <boost/wave/token_ids.hpp>
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///////////////////////////////////////////////////////////////////////////////
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class collect_token_statistics
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{
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enum {
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count = boost::wave::T_LAST_TOKEN - boost::wave::T_FIRST_TOKEN
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};
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public:
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collect_token_statistics()
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{
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std::fill(&token_count[0], &token_count[count], 0);
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}
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// account for the given token type
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template <typename Token>
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void operator() (Token const& token)
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{
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using boost::wave::token_id;
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int id = token_id(token) - boost::wave::T_FIRST_TOKEN;
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BOOST_ASSERT(id < count);
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++token_count[id];
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}
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// print out the token statistics in descending order
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void print() const
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{
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using namespace boost::wave;
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typedef std::multimap<int, token_id> ids_type;
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ids_type ids;
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for (unsigned int i = 0; i < count; ++i)
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{
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ids.insert(ids_type::value_type(
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token_count[i], token_id(i + T_FIRST_TOKEN)));
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}
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ids_type::reverse_iterator rend = ids.rend();
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for(ids_type::reverse_iterator rit = ids.rbegin(); rit != rend; ++rit)
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{
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std::cout << boost::wave::get_token_name((*rit).second) << ": "
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<< (*rit).first << std::endl;
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}
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}
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private:
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int token_count[count];
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};
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#endif // !defined(COLLECT_TOKEN_STATISTICS_VERSION_HPP)
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