Chris@16: /*=============================================================================
Chris@16:     Boost.Wave: A Standard compliant C++ preprocessor library
Chris@16:     Definition of the preprocessor context
Chris@16:     
Chris@16:     http://www.boost.org/
Chris@16: 
Chris@16:     Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
Chris@16:     Software License, Version 1.0. (See accompanying file
Chris@16:     LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: =============================================================================*/
Chris@16: 
Chris@16: #if !defined(CPP_CONTEXT_HPP_907485E2_6649_4A87_911B_7F7225F3E5B8_INCLUDED)
Chris@16: #define CPP_CONTEXT_HPP_907485E2_6649_4A87_911B_7F7225F3E5B8_INCLUDED
Chris@16: 
Chris@16: #include <string>
Chris@16: #include <vector>
Chris@16: #include <stack>
Chris@16: 
Chris@16: #include <boost/concept_check.hpp>
Chris@16: #include <boost/noncopyable.hpp>
Chris@16: #include <boost/filesystem/path.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: #include <boost/pool/pool_alloc.hpp>
Chris@16: 
Chris@16: #include <boost/wave/wave_config.hpp>
Chris@16: #if BOOST_WAVE_SERIALIZATION != 0
Chris@16: #include <boost/serialization/serialization.hpp>
Chris@16: #include <boost/wave/wave_config_constant.hpp>
Chris@16: #endif
Chris@16: #include <boost/wave/token_ids.hpp>
Chris@16: 
Chris@16: #include <boost/wave/util/unput_queue_iterator.hpp>
Chris@16: #include <boost/wave/util/cpp_ifblock.hpp>
Chris@16: #include <boost/wave/util/cpp_include_paths.hpp>
Chris@16: #include <boost/wave/util/iteration_context.hpp>
Chris@16: #include <boost/wave/util/cpp_iterator.hpp>
Chris@16: #include <boost/wave/util/cpp_macromap.hpp>
Chris@16: 
Chris@16: #include <boost/wave/preprocessing_hooks.hpp>
Chris@16: #include <boost/wave/whitespace_handling.hpp>
Chris@16: #include <boost/wave/cpp_iteration_context.hpp>
Chris@16: #include <boost/wave/language_support.hpp>
Chris@16: 
Chris@16: // this must occur after all of the includes and before any code appears
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #include BOOST_ABI_PREFIX
Chris@16: #endif
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: namespace boost {
Chris@16: namespace wave {
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // 
Chris@16: //  The C/C++ preprocessor context template class
Chris@16: //
Chris@16: //      The boost::wave::context template is the main interface class to 
Chris@16: //      control the behavior of the preprocessing engine.
Chris@16: //
Chris@16: //      The following template parameters has to be supplied:
Chris@16: //
Chris@16: //      IteratorT       The iterator type of the underlying input stream
Chris@16: //      LexIteratorT    The lexer iterator type to use as the token factory
Chris@16: //      InputPolicyT    The input policy type to use for loading the files
Chris@16: //                      to be included. This template parameter is optional and 
Chris@16: //                      defaults to the 
Chris@16: //                          iteration_context_policies::load_file_to_string
Chris@16: //                      type.
Chris@16: //      HooksT          The hooks policy to use for different notification 
Chris@16: //                      callbacks. This template parameter is optional and
Chris@16: //                      defaults to the
Chris@16: //                          context_policies::default_preprocessing_hooks
Chris@16: //                      type.
Chris@16: //      DerivedT        The type of the type being derived from the context
Chris@16: //                      type (if any). This template parameter is optional and
Chris@16: //                      defaults to 'this_type', which means that the context 
Chris@16: //                      type will be used assuming no derived type exists.
Chris@16: //
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: 
Chris@16: struct this_type {};
Chris@16: 
Chris@16: template <
Chris@16:     typename IteratorT,
Chris@16:     typename LexIteratorT, 
Chris@16:     typename InputPolicyT = iteration_context_policies::load_file_to_string,
Chris@16:     typename HooksT = context_policies::eat_whitespace<typename LexIteratorT::token_type>,
Chris@16:     typename DerivedT = this_type
Chris@16: >
Chris@16: class context : private boost::noncopyable
Chris@16: {
Chris@16: private:
Chris@16:     typedef typename mpl::if_<
Chris@16:             is_same<DerivedT, this_type>, context, DerivedT
Chris@16:         >::type actual_context_type;
Chris@16: 
Chris@16: public:
Chris@16: 
Chris@16: // concept checks
Chris@16: // the given iterator should be at least a forward iterator type
Chris@16:     BOOST_CLASS_REQUIRE(IteratorT, boost, ForwardIteratorConcept);
Chris@16: 
Chris@16: // public typedefs
Chris@16:     typedef typename LexIteratorT::token_type       token_type;
Chris@16:     typedef typename token_type::string_type        string_type;
Chris@16: 
Chris@16:     typedef IteratorT                               target_iterator_type;
Chris@16:     typedef LexIteratorT                            lexer_type;
Chris@16:     typedef pp_iterator<context>                    iterator_type;
Chris@16: 
Chris@16:     typedef InputPolicyT                            input_policy_type;
Chris@16:     typedef typename token_type::position_type      position_type;
Chris@16: 
Chris@16: // type of a token sequence
Chris@16:     typedef std::list<token_type, boost::fast_pool_allocator<token_type> > 
Chris@16:         token_sequence_type;
Chris@16: // type of the policies
Chris@16:     typedef HooksT                                  hook_policy_type;
Chris@16: 
Chris@16: private:
Chris@16: // stack of shared_ptr's to the pending iteration contexts 
Chris@16:     typedef boost::shared_ptr<base_iteration_context<context, lexer_type> > 
Chris@16:         iteration_ptr_type;
Chris@16:     typedef boost::wave::util::iteration_context_stack<iteration_ptr_type> 
Chris@16:             iteration_context_stack_type;
Chris@16:     typedef typename iteration_context_stack_type::size_type iter_size_type;
Chris@16: 
Chris@16:     context *this_() { return this; }           // avoid warning in constructor
Chris@16: 
Chris@16: public:
Chris@16:     context(target_iterator_type const &first_, target_iterator_type const &last_, 
Chris@16:             char const *fname = "<Unknown>", HooksT const &hooks_ = HooksT())
Chris@16:     :   first(first_), last(last_), filename(fname)
Chris@16:       , has_been_initialized(false)
Chris@16: #if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
Chris@16:       , current_filename(fname)
Chris@16: #endif 
Chris@16:       , current_relative_filename(fname)
Chris@16:       , macros(*this_())
Chris@16:       , language(language_support(
Chris@16:                       support_cpp 
Chris@16:                     | support_option_convert_trigraphs 
Chris@16:                     | support_option_emit_line_directives 
Chris@16: #if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
Chris@16:                     | support_option_include_guard_detection
Chris@16: #endif
Chris@16: #if BOOST_WAVE_EMIT_PRAGMA_DIRECTIVES != 0
Chris@16:                     | support_option_emit_pragma_directives
Chris@16: #endif
Chris@16:                     | support_option_insert_whitespace
Chris@16:                    ))
Chris@16:       , hooks(hooks_)
Chris@16:     {
Chris@16:         macros.init_predefined_macros(fname);
Chris@16:     }
Chris@16: 
Chris@16: // default copy constructor
Chris@16: // default assignment operator
Chris@16: // default destructor
Chris@16: 
Chris@16: // iterator interface
Chris@16:     iterator_type begin() 
Chris@16:     { 
Chris@16:         std::string fname(filename);
Chris@16:         if (filename != "<Unknown>" && filename != "<stdin>") {
Chris@16:             using namespace boost::filesystem;
Chris@16:             path fpath(util::complete_path(path(filename)));
Chris@16:             fname = fpath.string();
Chris@16:         }
Chris@16:         return iterator_type(*this, first, last, position_type(fname.c_str())); 
Chris@16:     }
Chris@16:     iterator_type begin(
Chris@16:         target_iterator_type const &first_, 
Chris@16:         target_iterator_type const &last_) 
Chris@16:     { 
Chris@16:         std::string fname(filename);
Chris@16:         if (filename != "<Unknown>" && filename != "<stdin>") {
Chris@16:             using namespace boost::filesystem;
Chris@16:             path fpath(util::complete_path(path(filename)));
Chris@16:             fname = fpath.string();
Chris@16:         }
Chris@16:         return iterator_type(*this, first_, last_, position_type(fname.c_str())); 
Chris@16:     }
Chris@16:     iterator_type end() const 
Chris@16:         { return iterator_type(); }
Chris@16: 
Chris@16: // maintain include paths
Chris@16:     bool add_include_path(char const *path_)
Chris@16:         { return includes.add_include_path(path_, false);}
Chris@16:     bool add_sysinclude_path(char const *path_)
Chris@16:         { return includes.add_include_path(path_, true);}
Chris@16:     void set_sysinclude_delimiter() { includes.set_sys_include_delimiter(); }
Chris@16:     typename iteration_context_stack_type::size_type get_iteration_depth() const 
Chris@16:         { return iter_ctxs.size(); }
Chris@16: 
Chris@16: // maintain defined macros
Chris@16: #if BOOST_WAVE_ENABLE_COMMANDLINE_MACROS != 0
Chris@16:     template <typename StringT>
Chris@16:     bool add_macro_definition(StringT macrostring, bool is_predefined = false)
Chris@16:     { 
Chris@16:         return boost::wave::util::add_macro_definition(*this, 
Chris@16:             util::to_string<std::string>(macrostring), is_predefined, 
Chris@16:             get_language()); 
Chris@16:     }
Chris@16: #endif 
Chris@16: // Define and undefine macros, macro introspection
Chris@16:     template <typename StringT>
Chris@16:     bool add_macro_definition(StringT const &name, position_type const& pos, 
Chris@16:         bool has_params, std::vector<token_type> &parameters, 
Chris@16:         token_sequence_type &definition, bool is_predefined = false)
Chris@16:     { 
Chris@16:         return macros.add_macro(
Chris@16:             token_type(T_IDENTIFIER, util::to_string<string_type>(name), pos), 
Chris@16:             has_params, parameters, definition, is_predefined); 
Chris@16:     }
Chris@16:     template <typename StringT>
Chris@16:     bool is_defined_macro(StringT const &str) const
Chris@16:     { 
Chris@16:         return macros.is_defined(util::to_string<string_type>(str)); 
Chris@16:     }
Chris@16:     template <typename StringT>
Chris@16:     bool get_macro_definition(StringT const &name, 
Chris@16:         bool &has_params, bool &is_predefined, position_type &pos,
Chris@16:         std::vector<token_type> &parameters, 
Chris@16:         token_sequence_type &definition) const
Chris@16:     { 
Chris@16:         return macros.get_macro(util::to_string<string_type>(name), 
Chris@16:             has_params, is_predefined, pos, parameters, definition); 
Chris@16:     }
Chris@16:     template <typename StringT>
Chris@16:     bool remove_macro_definition(StringT const& undefname, bool even_predefined = false)
Chris@16:     { 
Chris@16:         // strip leading and trailing whitespace
Chris@16:         string_type name = util::to_string<string_type>(undefname);
Chris@16:         typename string_type::size_type pos = name.find_first_not_of(" \t");
Chris@16:         if (pos != string_type::npos) {
Chris@16:             typename string_type::size_type endpos = name.find_last_not_of(" \t");
Chris@16:             name = name.substr(pos, endpos-pos+1);
Chris@16:         }
Chris@16: 
Chris@16: #if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
Chris@16:         // ensure this gets removed from the list of include guards as well
Chris@16:         includes.remove_pragma_once_header(
Chris@16:             util::to_string<std::string>(name));
Chris@16: #endif
Chris@16:         return macros.remove_macro(name, macros.get_main_pos(), even_predefined); 
Chris@16:     }
Chris@16:     void reset_macro_definitions() 
Chris@16:         { macros.reset_macromap(); macros.init_predefined_macros(); }
Chris@16: 
Chris@16: // Iterate over names of defined macros
Chris@16:     typedef boost::wave::util::macromap<context> macromap_type;
Chris@16:     typedef typename macromap_type::name_iterator name_iterator;
Chris@16:     typedef typename macromap_type::const_name_iterator const_name_iterator;
Chris@16: 
Chris@16:     name_iterator macro_names_begin() { return macros.begin(); }
Chris@16:     name_iterator macro_names_end() { return macros.end(); }
Chris@16:     const_name_iterator macro_names_begin() const { return macros.begin(); }
Chris@16:     const_name_iterator macro_names_end() const { return macros.end(); }
Chris@16: 
Chris@16: // This version now is used internally mainly, but since it was a documented
Chris@16: // API function we leave it in the public interface.
Chris@16:     bool add_macro_definition(token_type const &name, bool has_params,
Chris@16:         std::vector<token_type> &parameters, token_sequence_type &definition,
Chris@16:         bool is_predefined = false)
Chris@16:     { 
Chris@16:         return macros.add_macro(name, has_params, parameters, definition, 
Chris@16:             is_predefined); 
Chris@16:     }
Chris@16: 
Chris@16: // get the Wave version information 
Chris@16:     static std::string get_version()  
Chris@16:     { 
Chris@16:         boost::wave::util::predefined_macros p; 
Chris@16:         return util::to_string<std::string>(p.get_fullversion()); 
Chris@16:     }
Chris@16:     static std::string get_version_string()  
Chris@16:     {
Chris@16:         boost::wave::util::predefined_macros p;
Chris@16:         return util::to_string<std::string>(p.get_versionstr()); 
Chris@16:     }
Chris@16: 
Chris@16: // access current language options
Chris@16:     void set_language(boost::wave::language_support language_,
Chris@16:                       bool reset_macros = true) 
Chris@16:     { 
Chris@16:         language = language_; 
Chris@16:         if (reset_macros)
Chris@16:             reset_macro_definitions();
Chris@16:     }
Chris@16:     boost::wave::language_support get_language() const { return language; }
Chris@16: 
Chris@16:     position_type &get_main_pos() { return macros.get_main_pos(); }
Chris@16:     position_type const& get_main_pos() const { return macros.get_main_pos(); }
Chris@16: 
Chris@16: // change and ask for maximal possible include nesting depth
Chris@16:     void set_max_include_nesting_depth(iter_size_type new_depth)
Chris@16:         { iter_ctxs.set_max_include_nesting_depth(new_depth); }
Chris@16:     iter_size_type get_max_include_nesting_depth() const
Chris@16:         { return iter_ctxs.get_max_include_nesting_depth(); }
Chris@16: 
Chris@16: // access the policies
Chris@16:     hook_policy_type &get_hooks() { return hooks; }
Chris@16:     hook_policy_type const &get_hooks() const { return hooks; }
Chris@16: 
Chris@16: // return type of actually used context type (might be the derived type)
Chris@16:     actual_context_type& derived() 
Chris@16:         { return *static_cast<actual_context_type*>(this); } 
Chris@16:     actual_context_type const& derived() const
Chris@16:         { return *static_cast<actual_context_type const*>(this); } 
Chris@16: 
Chris@16: // return the directory of the currently preprocessed file
Chris@16:     boost::filesystem::path get_current_directory() const
Chris@16:         { return includes.get_current_directory(); }
Chris@16: 
Chris@16: #if !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)
Chris@16: protected:
Chris@16:     friend class boost::wave::pp_iterator<context>;
Chris@16:     friend class boost::wave::impl::pp_iterator_functor<context>;
Chris@16: #endif
Chris@16: 
Chris@16: // make sure the context has been initialized    
Chris@16:     void init_context()
Chris@16:     {
Chris@16:         if (!has_been_initialized) {
Chris@16:             std::string fname(filename);
Chris@16:             if (filename != "<Unknown>" && filename != "<stdin>") {
Chris@16:                 using namespace boost::filesystem;
Chris@16:                 path fpath(util::complete_path(path(filename)));
Chris@16:                 fname = fpath.string();
Chris@16:                 includes.set_current_directory(fname.c_str());
Chris@16:             }
Chris@16:             has_been_initialized = true;  // execute once
Chris@16:         }
Chris@16:     }
Chris@16: 
Chris@16:     template <typename IteratorT2>
Chris@16:     bool is_defined_macro(IteratorT2 const &begin, IteratorT2 const &end) const
Chris@16:         { return macros.is_defined(begin, end); }
Chris@16: 
Chris@16: // maintain include paths (helper functions)
Chris@16:     void set_current_directory(char const *path_) 
Chris@16:         { includes.set_current_directory(path_); }
Chris@16: 
Chris@16: // conditional compilation contexts
Chris@16:     bool get_if_block_status() const { return ifblocks.get_status(); }
Chris@16:     bool get_if_block_some_part_status() const 
Chris@16:         { return ifblocks.get_some_part_status(); } 
Chris@16:     bool get_enclosing_if_block_status() const
Chris@16:         { return ifblocks.get_enclosing_status(); }
Chris@16:     void enter_if_block(bool new_status) 
Chris@16:         { ifblocks.enter_if_block(new_status); }
Chris@16:     bool enter_elif_block(bool new_status) 
Chris@16:         { return ifblocks.enter_elif_block(new_status); }
Chris@16:     bool enter_else_block() { return ifblocks.enter_else_block(); }
Chris@16:     bool exit_if_block() { return ifblocks.exit_if_block(); }
Chris@16:     typename boost::wave::util::if_block_stack::size_type get_if_block_depth() const 
Chris@16:         { return ifblocks.get_if_block_depth(); }
Chris@16: 
Chris@16: // stack of iteration contexts
Chris@16:     iteration_ptr_type pop_iteration_context()
Chris@16:         { iteration_ptr_type top = iter_ctxs.top(); iter_ctxs.pop(); return top; }
Chris@16:     void push_iteration_context(position_type const &act_pos, iteration_ptr_type iter_ctx)
Chris@16:         { iter_ctxs.push(*this, act_pos, iter_ctx); }
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: //
Chris@16: //  expand_tokensequence(): 
Chris@16: //      expands all macros contained in a given token sequence, handles '##' 
Chris@16: //      and '#' pp operators and re-scans the resulting sequence 
Chris@16: //      (essentially pre-processes the token sequence).
Chris@16: //
Chris@16: //      The expand_undefined parameter is true during macro expansion inside
Chris@16: //      a C++ expression given for a #if or #elif statement. 
Chris@16: //
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16:     template <typename IteratorT2>
Chris@16:     token_type expand_tokensequence(IteratorT2 &first_, IteratorT2 const &last_, 
Chris@16:         token_sequence_type &pending, token_sequence_type &expanded, 
Chris@16:         bool& seen_newline, bool expand_undefined = false)
Chris@16:     {
Chris@16:         return macros.expand_tokensequence(first_, last_, pending, expanded, 
Chris@16:             seen_newline, expand_undefined);
Chris@16:     }
Chris@16: 
Chris@16:     template <typename IteratorT2>
Chris@16:     void expand_whole_tokensequence(IteratorT2 &first_, IteratorT2 const &last_, 
Chris@16:         token_sequence_type &expanded, bool expand_undefined = true)
Chris@16:     {
Chris@16:         macros.expand_whole_tokensequence(expanded, first_, last_, 
Chris@16:             expand_undefined);
Chris@16: 
Chris@16:     // remove any contained placeholder
Chris@16:         boost::wave::util::impl::remove_placeholders(expanded);
Chris@16:     }
Chris@16: 
Chris@16: public:
Chris@16: #if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
Chris@16: // support for #pragma once
Chris@16: // maintain the real name of the current preprocessed file
Chris@16:     void set_current_filename(char const *real_name)
Chris@16:         { current_filename = real_name; }
Chris@16:     std::string const &get_current_filename() const 
Chris@16:         { return current_filename; }
Chris@16: 
Chris@16: // maintain the list of known headers containing #pragma once 
Chris@16:     bool has_pragma_once(std::string const &filename_)
Chris@16:         { return includes.has_pragma_once(filename_); }
Chris@16:     bool add_pragma_once_header(std::string const &filename_,
Chris@16:             std::string const& guard_name)
Chris@16:     { 
Chris@16:         get_hooks().detected_include_guard(derived(), filename_, guard_name);
Chris@16:         return includes.add_pragma_once_header(filename_, guard_name); 
Chris@16:     }
Chris@16:     bool add_pragma_once_header(token_type const &pragma_, 
Chris@16:         std::string const &filename_)
Chris@16:     { 
Chris@16:         get_hooks().detected_pragma_once(derived(), pragma_, filename_);
Chris@16:         return includes.add_pragma_once_header(filename_, 
Chris@16:             "__BOOST_WAVE_PRAGMA_ONCE__"); 
Chris@16:     }
Chris@16: #endif 
Chris@16: 
Chris@16:     void set_current_relative_filename(char const *real_name)
Chris@16:         { current_relative_filename = real_name; }
Chris@16:     std::string const &get_current_relative_filename() const 
Chris@16:         { return current_relative_filename; }
Chris@16: 
Chris@16:     bool find_include_file (std::string &s, std::string &d, bool is_system, 
Chris@16:         char const *current_file) const
Chris@16:     { return includes.find_include_file(s, d, is_system, current_file); }
Chris@16: 
Chris@16: #if BOOST_WAVE_SERIALIZATION != 0
Chris@16: public:
Chris@16:     BOOST_STATIC_CONSTANT(unsigned int, version = 0x10);
Chris@16:     BOOST_STATIC_CONSTANT(unsigned int, version_mask = 0x0f);
Chris@16: 
Chris@16: private:
Chris@16:     friend class boost::serialization::access;
Chris@16:     template<class Archive>
Chris@16:     void save(Archive & ar, const unsigned int version) const
Chris@16:     {
Chris@16:         using namespace boost::serialization;
Chris@16: 
Chris@16:         string_type cfg(BOOST_PP_STRINGIZE(BOOST_WAVE_CONFIG));
Chris@16:         string_type kwd(BOOST_WAVE_PRAGMA_KEYWORD);
Chris@16:         string_type strtype(BOOST_PP_STRINGIZE((BOOST_WAVE_STRINGTYPE)));
Chris@16:         ar & make_nvp("config", cfg);
Chris@16:         ar & make_nvp("pragma_keyword", kwd);
Chris@16:         ar & make_nvp("string_type", strtype);
Chris@16: 
Chris@16:         ar & make_nvp("language_options", language);
Chris@16:         ar & make_nvp("macro_definitions", macros);
Chris@16:         ar & make_nvp("include_settings", includes);
Chris@16:     }
Chris@16:     template<class Archive>
Chris@16:     void load(Archive & ar, const unsigned int loaded_version)
Chris@16:     {
Chris@16:         using namespace boost::serialization;
Chris@16:         if (version != (loaded_version & ~version_mask)) {
Chris@16:             BOOST_WAVE_THROW_CTX((*this), preprocess_exception, 
Chris@16:                 incompatible_config, "cpp_context state version", 
Chris@16:                 get_main_pos());
Chris@16:             return;
Chris@16:         }
Chris@16: 
Chris@16:         // check compatibility of the stored information
Chris@16:         string_type config, pragma_keyword, string_type_str;
Chris@16: 
Chris@16:         // BOOST_PP_STRINGIZE(BOOST_WAVE_CONFIG)
Chris@16:         ar & make_nvp("config", config);
Chris@16:         if (config != BOOST_PP_STRINGIZE(BOOST_WAVE_CONFIG)) {
Chris@16:             BOOST_WAVE_THROW_CTX((*this), preprocess_exception, 
Chris@16:                 incompatible_config, "BOOST_WAVE_CONFIG", get_main_pos());
Chris@16:             return;
Chris@16:         }
Chris@16: 
Chris@16:         // BOOST_WAVE_PRAGMA_KEYWORD
Chris@16:         ar & make_nvp("pragma_keyword", pragma_keyword);
Chris@16:         if (pragma_keyword != BOOST_WAVE_PRAGMA_KEYWORD) {
Chris@16:             BOOST_WAVE_THROW_CTX((*this), preprocess_exception, 
Chris@16:                 incompatible_config, "BOOST_WAVE_PRAGMA_KEYWORD", 
Chris@16:                 get_main_pos());
Chris@16:             return;
Chris@16:         }
Chris@16: 
Chris@16:         // BOOST_PP_STRINGIZE((BOOST_WAVE_STRINGTYPE))
Chris@16:         ar & make_nvp("string_type", string_type_str);
Chris@16:         if (string_type_str != BOOST_PP_STRINGIZE((BOOST_WAVE_STRINGTYPE))) {
Chris@16:             BOOST_WAVE_THROW_CTX((*this), preprocess_exception, 
Chris@16:                 incompatible_config, "BOOST_WAVE_STRINGTYPE", get_main_pos());
Chris@16:             return;
Chris@16:         }
Chris@16: 
Chris@16:         try {
Chris@16:             // read in the useful bits
Chris@16:             ar & make_nvp("language_options", language);
Chris@16:             ar & make_nvp("macro_definitions", macros);
Chris@16:             ar & make_nvp("include_settings", includes);
Chris@16:         }
Chris@16:         catch (boost::wave::preprocess_exception const& e) {
Chris@16:         // catch version mismatch exceptions and call error handler
Chris@16:             get_hooks().throw_exception(derived(), e); 
Chris@16:         }
Chris@16:     }
Chris@16:     BOOST_SERIALIZATION_SPLIT_MEMBER()
Chris@16: #endif
Chris@16: 
Chris@16: private:
Chris@16: // the main input stream
Chris@16:     target_iterator_type first;         // underlying input stream
Chris@16:     target_iterator_type last;
Chris@16:     std::string filename;               // associated main filename
Chris@16:     bool has_been_initialized;          // set cwd once
Chris@16: #if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
Chris@16:     std::string current_filename;       // real name of current preprocessed file
Chris@16: #endif 
Chris@16:     std::string current_relative_filename;        // real relative name of current preprocessed file
Chris@16: 
Chris@16:     boost::wave::util::if_block_stack ifblocks;   // conditional compilation contexts
Chris@16:     boost::wave::util::include_paths includes;    // lists of include directories to search
Chris@16:     iteration_context_stack_type iter_ctxs;       // iteration contexts
Chris@16:     macromap_type macros;                         // map of defined macros
Chris@16:     boost::wave::language_support language;       // supported language/extensions
Chris@16:     hook_policy_type hooks;                       // hook policy instance
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: }   // namespace wave
Chris@16: }   // namespace boost
Chris@16: 
Chris@16: #if BOOST_WAVE_SERIALIZATION != 0
Chris@16: namespace boost { namespace serialization {
Chris@16: 
Chris@16: template<
Chris@16:     typename Iterator, typename LexIterator, 
Chris@16:     typename InputPolicy, typename Hooks
Chris@16: >
Chris@16: struct tracking_level<boost::wave::context<Iterator, LexIterator, InputPolicy, Hooks> >
Chris@16: {
Chris@16:     typedef mpl::integral_c_tag tag;
Chris@16:     typedef mpl::int_<track_never> type;
Chris@16:     BOOST_STATIC_CONSTANT(
Chris@16:         int,
Chris@16:         value = tracking_level::type::value
Chris@16:     );
Chris@16: };
Chris@16: 
Chris@16: template<
Chris@16:     typename Iterator, typename LexIterator, 
Chris@16:     typename InputPolicy, typename Hooks
Chris@16: >
Chris@16: struct version<boost::wave::context<Iterator, LexIterator, InputPolicy, Hooks> >
Chris@16: {
Chris@16:     typedef boost::wave::context<Iterator, LexIterator, InputPolicy, Hooks>
Chris@16:         target_type;
Chris@16:     typedef mpl::int_<target_type::version> type;
Chris@16:     typedef mpl::integral_c_tag tag;
Chris@16:     BOOST_STATIC_CONSTANT(unsigned int, value = version::type::value);
Chris@16: };
Chris@16: 
Chris@16: }}  // namespace boost::serialization
Chris@16: #endif
Chris@16: 
Chris@16: // the suffix header occurs after all of the code
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #include BOOST_ABI_SUFFIX
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined(CPP_CONTEXT_HPP_907485E2_6649_4A87_911B_7F7225F3E5B8_INCLUDED)