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