projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Boost.Wave: A Standard compliant C++ preprocessor library | |
| 3 | ||
| 4 | http://www.boost.org/ | |
| 5 | ||
| 6 | Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost | |
| 7 | Software License, Version 1.0. (See accompanying file | |
| 8 | LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 9 | =============================================================================*/ | |
| 10 | ||
| 11 | #if !defined(TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED) | |
| 12 | #define TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED | |
| 13 | ||
| 14 | #include <vector> | |
| 15 | ||
| 16 | #include <boost/wave/wave_config.hpp> | |
| 17 | #include <boost/wave/token_ids.hpp> | |
| 18 | ||
| 19 | // this must occur after all of the includes and before any code appears | |
| 20 | #ifdef BOOST_HAS_ABI_HEADERS | |
| 21 | #include BOOST_ABI_PREFIX | |
| 22 | #endif | |
| 23 | ||
| 24 | /////////////////////////////////////////////////////////////////////////////// | |
| 25 | namespace boost { | |
| 26 | namespace wave { | |
| 27 | namespace cpplexer { | |
| 28 | ||
| 29 | /////////////////////////////////////////////////////////////////////////////// | |
| 30 | // | |
| 31 | // The token_cache template is used to cache the tokens corresponding to the | |
| 32 | // keywords, operators and other constant language elements. | |
| 33 | // | |
| 34 | // This avoids repeated construction of these tokens, which is especially | |
| 35 | // effective when used in conjunction with a copy on write string | |
| 36 | // implementation (COW string). | |
| 37 | // | |
| 38 | /////////////////////////////////////////////////////////////////////////////// | |
| 39 | template <typename StringT> | |
| 40 | class token_cache | |
| 41 | { | |
| 42 | public: | |
| 43 | token_cache() | |
| 44 | : cache(T_LAST_TOKEN - T_FIRST_TOKEN) | |
| 45 | { | |
| 46 | typename std::vector<StringT>::iterator it = cache.begin(); | |
| 47 | for (unsigned int i = T_FIRST_TOKEN; i < T_LAST_TOKEN; ++i, ++it) | |
| 48 | { | |
| 49 | *it = StringT(boost::wave::get_token_value(token_id(i))); | |
| 50 | } | |
| 51 | } | |
| 52 | ||
| 53 | StringT const &get_token_value(token_id id) const | |
| 54 | { | |
| 55 | return cache[BASEID_FROM_TOKEN(id) - T_FIRST_TOKEN]; | |
| 56 | } | |
| 57 | ||
| 58 | private: | |
| 59 | std::vector<StringT> cache; | |
| 60 | }; | |
| 61 | ||
| 62 | /////////////////////////////////////////////////////////////////////////////// | |
| 63 | } // namespace cpplexer | |
| 64 | } // namespace wave | |
| 65 | } // namespace boost | |
| 66 | ||
| 67 | // the suffix header occurs after all of the code | |
| 68 | #ifdef BOOST_HAS_ABI_HEADERS | |
| 69 | #include BOOST_ABI_SUFFIX | |
| 70 | #endif | |
| 71 | ||
| 72 | #endif // !defined(TOKEN_CACHE_HPP_4D2320B7_1D56_4113_A114_397E70FA438C_INCLUDED) |