annotate DEPENDENCIES/generic/include/boost/wave/cpplexer/token_cache.hpp @ 125:34e428693f5d vext

Vext -> Repoint
author Chris Cannam
date Thu, 14 Jun 2018 11:15:39 +0100
parents 2665513ce2d3
children
rev   line source
Chris@16 1 /*=============================================================================
Chris@16 2 Boost.Wave: A Standard compliant C++ preprocessor library
Chris@16 3
Chris@16 4 http://www.boost.org/
Chris@16 5
Chris@16 6 Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
Chris@16 7 Software License, Version 1.0. (See accompanying file
Chris@16 8 LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16 9 =============================================================================*/
Chris@16 10
Chris@16 11 #if !defined(TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED)
Chris@16 12 #define TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED
Chris@16 13
Chris@16 14 #include <vector>
Chris@16 15
Chris@16 16 #include <boost/wave/wave_config.hpp>
Chris@16 17 #include <boost/wave/token_ids.hpp>
Chris@16 18
Chris@16 19 // this must occur after all of the includes and before any code appears
Chris@16 20 #ifdef BOOST_HAS_ABI_HEADERS
Chris@16 21 #include BOOST_ABI_PREFIX
Chris@16 22 #endif
Chris@16 23
Chris@16 24 ///////////////////////////////////////////////////////////////////////////////
Chris@16 25 namespace boost {
Chris@16 26 namespace wave {
Chris@16 27 namespace cpplexer {
Chris@16 28
Chris@16 29 ///////////////////////////////////////////////////////////////////////////////
Chris@16 30 //
Chris@16 31 // The token_cache template is used to cache the tokens corresponding to the
Chris@16 32 // keywords, operators and other constant language elements.
Chris@16 33 //
Chris@16 34 // This avoids repeated construction of these tokens, which is especially
Chris@16 35 // effective when used in conjunction with a copy on write string
Chris@16 36 // implementation (COW string).
Chris@16 37 //
Chris@16 38 ///////////////////////////////////////////////////////////////////////////////
Chris@16 39 template <typename StringT>
Chris@16 40 class token_cache
Chris@16 41 {
Chris@16 42 public:
Chris@16 43 token_cache()
Chris@16 44 : cache(T_LAST_TOKEN - T_FIRST_TOKEN)
Chris@16 45 {
Chris@16 46 typename std::vector<StringT>::iterator it = cache.begin();
Chris@16 47 for (unsigned int i = T_FIRST_TOKEN; i < T_LAST_TOKEN; ++i, ++it)
Chris@16 48 {
Chris@16 49 *it = StringT(boost::wave::get_token_value(token_id(i)));
Chris@16 50 }
Chris@16 51 }
Chris@16 52
Chris@16 53 StringT const &get_token_value(token_id id) const
Chris@16 54 {
Chris@16 55 return cache[BASEID_FROM_TOKEN(id) - T_FIRST_TOKEN];
Chris@16 56 }
Chris@16 57
Chris@16 58 private:
Chris@16 59 std::vector<StringT> cache;
Chris@16 60 };
Chris@16 61
Chris@16 62 ///////////////////////////////////////////////////////////////////////////////
Chris@16 63 } // namespace cpplexer
Chris@16 64 } // namespace wave
Chris@16 65 } // namespace boost
Chris@16 66
Chris@16 67 // the suffix header occurs after all of the code
Chris@16 68 #ifdef BOOST_HAS_ABI_HEADERS
Chris@16 69 #include BOOST_ABI_SUFFIX
Chris@16 70 #endif
Chris@16 71
Chris@16 72 #endif // !defined(TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED)