| /*============================================================================= |
| Boost.Wave: A Standard compliant C++ preprocessor library |
| |
| http://www.boost.org/ |
| |
| Copyright (c) 2001-2010 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(CPPLEXER_EXCEPTIONS_HPP_1A09DE1A_6D1F_4091_AF7F_5F13AB0D31AB_INCLUDED) |
| #define CPPLEXER_EXCEPTIONS_HPP_1A09DE1A_6D1F_4091_AF7F_5F13AB0D31AB_INCLUDED |
| |
| #include <exception> |
| #include <string> |
| |
| #include <boost/assert.hpp> |
| #include <boost/config.hpp> |
| #include <boost/throw_exception.hpp> |
| |
| #include <boost/wave/wave_config.hpp> |
| |
| // this must occur after all of the includes and before any code appears |
| #ifdef BOOST_HAS_ABI_HEADERS |
| #include BOOST_ABI_PREFIX |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // helper macro for throwing exceptions |
| #if !defined(BOOST_WAVE_LEXER_THROW) |
| #ifdef BOOST_NO_STRINGSTREAM |
| #include <strstream> |
| #define BOOST_WAVE_LEXER_THROW(cls, code, msg, line, column, name) \ |
| { \ |
| using namespace boost::wave; \ |
| std::strstream stream; \ |
| stream << cls::severity_text(cls::code) << ": " \ |
| << cls::error_text(cls::code); \ |
| if ((msg)[0] != 0) stream << ": " << (msg); \ |
| stream << std::ends; \ |
| std::string throwmsg = stream.str(); stream.freeze(false); \ |
| boost::throw_exception(cls(throwmsg.c_str(), cls::code, line, column, \ |
| name)); \ |
| } \ |
| /**/ |
| #else |
| #include <sstream> |
| #define BOOST_WAVE_LEXER_THROW(cls, code, msg, line, column, name) \ |
| { \ |
| using namespace boost::wave; \ |
| std::stringstream stream; \ |
| stream << cls::severity_text(cls::code) << ": " \ |
| << cls::error_text(cls::code); \ |
| if ((msg)[0] != 0) stream << ": " << (msg); \ |
| stream << std::ends; \ |
| boost::throw_exception(cls(stream.str().c_str(), cls::code, line, column, \ |
| name)); \ |
| } \ |
| /**/ |
| #endif // BOOST_NO_STRINGSTREAM |
| #endif // BOOST_WAVE_LEXER_THROW |
| |
| #if !defined(BOOST_WAVE_LEXER_THROW_VAR) |
| #ifdef BOOST_NO_STRINGSTREAM |
| #include <strstream> |
| #define BOOST_WAVE_LEXER_THROW_VAR(cls, codearg, msg, line, column, name) \ |
| { \ |
| using namespace boost::wave; \ |
| cls::error_code code = static_cast<cls::error_code>(codearg); \ |
| std::strstream stream; \ |
| stream << cls::severity_text(code) << ": " \ |
| << cls::error_text(code); \ |
| if ((msg)[0] != 0) stream << ": " << (msg); \ |
| stream << std::ends; \ |
| std::string throwmsg = stream.str(); stream.freeze(false); \ |
| boost::throw_exception(cls(throwmsg.c_str(), code, line, column, \ |
| name)); \ |
| } \ |
| /**/ |
| #else |
| #include <sstream> |
| #define BOOST_WAVE_LEXER_THROW_VAR(cls, codearg, msg, line, column, name) \ |
| { \ |
| using namespace boost::wave; \ |
| cls::error_code code = static_cast<cls::error_code>(codearg); \ |
| std::stringstream stream; \ |
| stream << cls::severity_text(code) << ": " \ |
| << cls::error_text(code); \ |
| if ((msg)[0] != 0) stream << ": " << (msg); \ |
| stream << std::ends; \ |
| boost::throw_exception(cls(stream.str().c_str(), code, line, column, \ |
| name)); \ |
| } \ |
| /**/ |
| #endif // BOOST_NO_STRINGSTREAM |
| #endif // BOOST_WAVE_LEXER_THROW |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| namespace boost { |
| namespace wave { |
| namespace cpplexer { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // exception severity |
| namespace util { |
| |
| enum severity { |
| severity_remark = 0, |
| severity_warning, |
| severity_error, |
| severity_fatal |
| }; |
| |
| inline char const * |
| get_severity(severity level) |
| { |
| static char const *severity_text[] = |
| { |
| "remark", // severity_remark |
| "warning", // severity_warning |
| "error", // severity_error |
| "fatal error" // severity_fatal |
| }; |
| BOOST_ASSERT(severity_remark <= level && level <= severity_fatal); |
| return severity_text[level]; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // cpplexer_exception, the base class for all specific C++ lexer exceptions |
| class BOOST_SYMBOL_VISIBLE cpplexer_exception |
| : public std::exception |
| { |
| public: |
| cpplexer_exception(int line_, int column_, char const *filename_) throw() |
| : line(line_), column(column_) |
| { |
| unsigned int off = 0; |
| while (off < sizeof(filename)-1 && *filename_) |
| filename[off++] = *filename_++; |
| filename[off] = 0; |
| } |
| ~cpplexer_exception() throw() {} |
| |
| virtual char const *what() const throw() = 0; // to be overloaded |
| virtual char const *description() const throw() = 0; |
| virtual int get_errorcode() const throw() = 0; |
| virtual int get_severity() const throw() = 0; |
| virtual bool is_recoverable() const throw() = 0; |
| |
| int line_no() const throw() { return line; } |
| int column_no() const throw() { return column; } |
| char const *file_name() const throw() { return filename; } |
| |
| protected: |
| char filename[512]; |
| int line; |
| int column; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // lexing_exception error |
| class BOOST_SYMBOL_VISIBLE lexing_exception : |
| public cpplexer_exception |
| { |
| public: |
| enum error_code { |
| unexpected_error = 0, |
| universal_char_invalid = 1, |
| universal_char_base_charset = 2, |
| universal_char_not_allowed = 3, |
| invalid_long_long_literal = 4, |
| generic_lexing_error = 5, |
| generic_lexing_warning = 6 |
| }; |
| |
| lexing_exception(char const *what_, error_code code, int line_, |
| int column_, char const *filename_) throw() |
| : cpplexer_exception(line_, column_, filename_), |
| level(severity_level(code)), code(code) |
| { |
| unsigned int off = 0; |
| while (off < sizeof(buffer) && *what_) |
| buffer[off++] = *what_++; |
| buffer[off] = 0; |
| } |
| ~lexing_exception() throw() {} |
| |
| virtual char const *what() const throw() |
| { |
| return "boost::wave::lexing_exception"; |
| } |
| virtual char const *description() const throw() |
| { |
| return buffer; |
| } |
| virtual int get_severity() const throw() |
| { |
| return level; |
| } |
| virtual int get_errorcode() const throw() |
| { |
| return code; |
| } |
| virtual bool is_recoverable() const throw() |
| { |
| switch (get_errorcode()) { |
| case lexing_exception::universal_char_invalid: |
| case lexing_exception::universal_char_base_charset: |
| case lexing_exception::universal_char_not_allowed: |
| case lexing_exception::invalid_long_long_literal: |
| case lexing_exception::generic_lexing_warning: |
| case lexing_exception::generic_lexing_error: |
| return true; // for now allow all exceptions to be recoverable |
| |
| case lexing_exception::unexpected_error: |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| static char const *error_text(int code) |
| { |
| // error texts in this array must appear in the same order as the items in |
| // the error enum above |
| static char const *preprocess_exception_errors[] = { |
| "unexpected error (should not happen)", // unexpected_error |
| "universal character name specifies an invalid character", // universal_char_invalid |
| "a universal character name cannot designate a character in the " |
| "basic character set", // universal_char_base_charset |
| "this universal character is not allowed in an identifier", // universal_char_not_allowed |
| "long long suffixes are not allowed in pure C++ mode, " |
| "enable long_long mode to allow these", // invalid_long_long_literal |
| "generic lexer error", // generic_lexing_error |
| "generic lexer warning" // generic_lexing_warning |
| }; |
| return preprocess_exception_errors[code]; |
| } |
| |
| static util::severity severity_level(int code) |
| { |
| static util::severity preprocess_exception_severity[] = { |
| util::severity_fatal, // unexpected_error |
| util::severity_error, // universal_char_invalid |
| util::severity_error, // universal_char_base_charset |
| util::severity_error, // universal_char_not_allowed |
| util::severity_warning, // invalid_long_long_literal |
| util::severity_error, // generic_lexing_error |
| util::severity_warning // invalid_long_long_literal |
| }; |
| return preprocess_exception_severity[code]; |
| } |
| static char const *severity_text(int code) |
| { |
| return util::get_severity(severity_level(code)); |
| } |
| |
| private: |
| char buffer[512]; |
| util::severity level; |
| error_code code; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // The is_recoverable() function allows to decide, whether it is possible |
| // simply to continue after a given exception was thrown by Wave. |
| // |
| // This is kind of a hack to allow to recover from certain errors as long as |
| // Wave doesn't provide better means of error recovery. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| inline bool |
| is_recoverable(lexing_exception const& e) |
| { |
| return e.is_recoverable(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| } // namespace cpplexer |
| } // 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(CPPLEXER_EXCEPTIONS_HPP_1A09DE1A_6D1F_4091_AF7F_5F13AB0D31AB_INCLUDED) |