/*============================================================================= Boost.Wave: A Standard compliant C++ preprocessor library http://www.boost.org/ Copyright (c) 2001-2007 Hartmut Kaiser. Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) =============================================================================*/ #if !defined(PREPROCESSING_HOOKS_HPP_338DE478_A13C_4B63_9BA9_041C917793B8_INCLUDED) #define PREPROCESSING_HOOKS_HPP_338DE478_A13C_4B63_9BA9_041C917793B8_INCLUDED #include #include // this must occur after all of the includes and before any code appears #ifdef BOOST_HAS_ABI_HEADERS #include BOOST_ABI_PREFIX #endif /////////////////////////////////////////////////////////////////////////////// namespace boost { namespace wave { namespace context_policies { /////////////////////////////////////////////////////////////////////////////// // // The default_preprocessing_hooks class is a placeholder for all // preprocessing hooks called from inside the preprocessing engine // /////////////////////////////////////////////////////////////////////////////// struct default_preprocessing_hooks { /////////////////////////////////////////////////////////////////////////// // // The function 'expanding_function_like_macro' is called, whenever a // function-like macro is to be expanded. // // The macroname parameter marks the position, where the macro to expand // is defined. // The formal_args parameter holds the formal arguments used during the // definition of the macro. // The definition parameter holds the macro definition for the macro to // trace. // // The macro call parameter marks the position, where this macro invoked. // The arguments parameter holds the macro arguments used during the // invocation of the macro // /////////////////////////////////////////////////////////////////////////// template void expanding_function_like_macro( TokenT const ¯odef, std::vector const &formal_args, ContainerT const &definition, TokenT const ¯ocall, std::vector const &arguments) {} /////////////////////////////////////////////////////////////////////////// // // The function 'expanding_object_like_macro' is called, whenever a // object-like macro is to be expanded . // // The macroname parameter marks the position, where the macro to expand // is defined. // The definition parameter holds the macro definition for the macro to // trace. // // The macro call parameter marks the position, where this macro invoked. // /////////////////////////////////////////////////////////////////////////// template void expanding_object_like_macro(TokenT const ¯o, ContainerT const &definition, TokenT const ¯ocall) {} /////////////////////////////////////////////////////////////////////////// // // The function 'expanded_macro' is called, whenever the expansion of a // macro is finished but before the rescanning process starts. // // The parameter 'result' contains the token sequence generated as the // result of the macro expansion. // /////////////////////////////////////////////////////////////////////////// template void expanded_macro(ContainerT const &result) {} /////////////////////////////////////////////////////////////////////////// // // The function 'rescanned_macro' is called, whenever the rescanning of a // macro is finished. // // The parameter 'result' contains the token sequence generated as the // result of the rescanning. // /////////////////////////////////////////////////////////////////////////// template void rescanned_macro(ContainerT const &result) {} /////////////////////////////////////////////////////////////////////////// // // The function 'found_include_directive' is called, whenever a #include // directive was located. // // The parameter 'filename' contains the (expanded) file name found after // the #include directive. This has the format '', '"file"' or // 'file'. // The formats '' or '"file"' are used for #include directives found // in the preprocessed token stream, the format 'file' is used for files // specified through the --force_include command line argument. // // The parameter 'include_next' is set to true if the found directive was // a #include_next directive and the BOOST_WAVE_SUPPORT_INCLUDE_NEXT // preprocessing constant was defined to something != 0. // /////////////////////////////////////////////////////////////////////////// void found_include_directive(std::string const &filename, bool include_next) {} /////////////////////////////////////////////////////////////////////////// // // The function 'opened_include_file' is called, whenever a file referred // by an #include directive was successfully located and opened. // // The parameter 'filename' contains the file system path of the // opened file (this is relative to the directory of the currently // processed file or a absolute path depending on the paths given as the // include search paths). // // The include_depth parameter contains the current include file depth. // // The is_system_include parameter denotes, whether the given file was // found as a result of a #include <...> directive. // /////////////////////////////////////////////////////////////////////////// void opened_include_file(std::string const &relname, std::string const &absname, std::size_t include_depth, bool is_system_include) {} /////////////////////////////////////////////////////////////////////////// // // The function 'returning_from_include_file' is called, whenever an // included file is about to be closed after it's processing is complete. // /////////////////////////////////////////////////////////////////////////// void returning_from_include_file() {} /////////////////////////////////////////////////////////////////////////// // // The function 'interpret_pragma' is called, whenever a #pragma command // directive is found which isn't known to the core Wave library, where // command is the value defined as the BOOST_WAVE_PRAGMA_KEYWORD constant // which defaults to "wave". // // The parameter 'ctx' is a reference to the context object used for // instantiating the preprocessing iterators by the user. // // The parameter 'pending' may be used to push tokens back into the input // stream, which are to be used as the replacement text for the whole // #pragma directive. // // The parameter 'option' contains the name of the interpreted pragma. // // The parameter 'values' holds the values of the parameter provided to // the pragma operator. // // The parameter 'act_token' contains the actual #pragma token, which may // be used for error output. // // If the return value is 'false', the whole #pragma directive is // interpreted as unknown and a corresponding error message is issued. A // return value of 'true' signs a successful interpretation of the given // #pragma. // /////////////////////////////////////////////////////////////////////////// template bool interpret_pragma(ContextT const &ctx, ContainerT &pending, typename ContextT::token_type const &option, ContainerT const &values, typename ContextT::token_type const &act_token) { return false; } /////////////////////////////////////////////////////////////////////////// // // The function 'defined_macro' is called, whenever a macro was defined // successfully. // // The parameter 'name' is a reference to the token holding the macro name. // // The parameter 'is_functionlike' is set to true, whenever the newly // defined macro is defined as a function like macro. // // The parameter 'parameters' holds the parameter tokens for the macro // definition. If the macro has no parameters or if it is a object like // macro, then this container is empty. // // The parameter 'definition' contains the token sequence given as the // replacement sequence (definition part) of the newly defined macro. // // The parameter 'is_predefined' is set to true for all macros predefined // during the initialisation phase of the library. // /////////////////////////////////////////////////////////////////////////// template void defined_macro(TokenT const ¯o_name, bool is_functionlike, ParametersT const ¶meters, DefinitionT const &definition, bool is_predefined) {} /////////////////////////////////////////////////////////////////////////// // // The function 'undefined_macro' is called, whenever a macro definition // was removed successfully. // // The parameter 'name' holds the name of the macro, which definition was // removed. // /////////////////////////////////////////////////////////////////////////// template void undefined_macro(TokenT const ¯o_name) {} /////////////////////////////////////////////////////////////////////////// // // The function 'found_directive' is called, whenever a preprocessor // directive was encountered, but before the corresponding action is // executed. // // The parameter 'directive' is a reference to the token holding the // preprocessing directive. // /////////////////////////////////////////////////////////////////////////// template void found_directive(TokenT const& directive) {} /////////////////////////////////////////////////////////////////////////// // // The function 'evaluated_conditional_expression' is called, whenever a // conditional preprocessing expression was evaluated (the expression // given to a #if, #ifdef or #ifndef directive) // // The parameter 'expression' holds the non-expanded token sequence // comprising the evaluated expression. // // The parameter expression_value contains the result of the evaluation of // the expression in the current preprocessing context. // /////////////////////////////////////////////////////////////////////////// template void evaluated_conditional_expression(ContainerT const& expression, bool expression_value) {} /////////////////////////////////////////////////////////////////////////// // // The function 'skipped_token' is called, whenever a token is about to be // skipped due to a false preprocessor condition (code fragments to be // skipped inside the not evaluated conditional #if/#else/#endif branches). // // The parameter 'token' refers to the token to be skipped. // // /////////////////////////////////////////////////////////////////////////// template void skipped_token(TokenT const& token) {} /////////////////////////////////////////////////////////////////////////// // // The function 'may_skip_whitespace' is called, will be called by the // library, whenever a token is about to be returned to the calling // application. // // The parameter 'ctx' is a reference to the context object used for // instantiating the preprocessing iterators by the user. // // The 'token' parameter holds a reference to the current token. The policy // is free to change this token if needed. // // The 'skipped_newline' parameter holds a reference to a boolean value // which should be set to true by the policy function whenever a newline // is going to be skipped. // // If the return value is true, the given token is skipped and the // preprocessing continues to the next token. If the return value is // false, the given token is returned to the calling application. // // ATTENTION! // Caution has to be used, because by returning true the policy function // is able to force skipping even significant tokens, not only whitespace. // /////////////////////////////////////////////////////////////////////////// template bool may_skip_whitespace(ContextT const& ctx, TokenT& token, bool& skipped_newline) { return false; } }; /////////////////////////////////////////////////////////////////////////////// } // namespace context_policies } // namespace wave } // namespace boost // the suffix header occurs after all of the code #ifdef BOOST_HAS_ABI_HEADERS #include BOOST_ABI_SUFFIX #endif #endif // !defined(PREPROCESSING_HOOKS_HPP_338DE478_A13C_4B63_9BA9_041C917793B8_INCLUDED)