ceph/src/boost/libs/wave/include/boost/wave/cpp_exceptions.hpp

   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(CPP_EXCEPTIONS_HPP_5190E447_A781_4521_A275_5134FF9917D7_INCLUDED)
  12 #define CPP_EXCEPTIONS_HPP_5190E447_A781_4521_A275_5134FF9917D7_INCLUDED
  13
  14 #include <exception>
  15 #include <string>
  16 #include <limits>
  17
  18 #include <boost/assert.hpp>
  19 #include <boost/config.hpp>
  20 #include <boost/throw_exception.hpp>
  21 #include <boost/wave/wave_config.hpp>
  22 #include <boost/wave/cpp_throw.hpp>
  23
  24 // this must occur after all of the includes and before any code appears
  25 #ifdef BOOST_HAS_ABI_HEADERS
  26 #include BOOST_ABI_PREFIX
  27 #endif
  28
  29 ///////////////////////////////////////////////////////////////////////////////
  30 namespace boost {
  31 namespace wave {
  32
  33 ///////////////////////////////////////////////////////////////////////////////
  34 // exception severity
  35 namespace util {
  36
  37     enum severity {
  38         severity_remark = 0,
  39         severity_warning,
  40         severity_error,
  41         severity_fatal,
  42         severity_commandline_error,
  43         last_severity_code = severity_commandline_error
  44     };
  45
  46     inline char const *
  47     get_severity(int level)
  48     {
  49         static char const *severity_text[] =
  50         {
  51             "remark",               // severity_remark
  52             "warning",              // severity_warning
  53             "error",                // severity_error
  54             "fatal error",          // severity_fatal
  55             "command line error"    // severity_commandline_error
  56         };
  57         BOOST_ASSERT(severity_remark <= level &&
  58             level <= last_severity_code);
  59         return severity_text[level];
  60     }
  61 }
  62
  63 ///////////////////////////////////////////////////////////////////////////////
  64 //  cpp_exception, the base class for all specific C preprocessor exceptions
  65 class BOOST_SYMBOL_VISIBLE cpp_exception
  66 :   public std::exception
  67 {
  68 public:
  69     cpp_exception(std::size_t line_, std::size_t column_, char const *filename_) throw()
  70     :   line(line_), column(column_)
  71     {
  72         unsigned int off = 0;
  73         while (off < sizeof(filename)-1 && *filename_)
  74             filename[off++] = *filename_++;
  75         filename[off] = 0;
  76     }
  77     ~cpp_exception() throw() {}
  78
  79     virtual char const *what() const throw() = 0;           // to be overloaded
  80     virtual char const *description() const throw() = 0;
  81     virtual int get_errorcode() const throw() = 0;
  82     virtual int get_severity() const throw() = 0;
  83     virtual char const* get_related_name() const throw() = 0;
  84     virtual bool is_recoverable() const throw() = 0;
  85
  86     std::size_t line_no() const throw() { return line; }
  87     std::size_t column_no() const throw() { return column; }
  88     char const *file_name() const throw() { return filename; }
  89
  90 protected:
  91     char filename[512];
  92     std::size_t line;
  93     std::size_t column;
  94 };
  95
  96 ///////////////////////////////////////////////////////////////////////////////
  97 // preprocessor error
  98 class BOOST_SYMBOL_VISIBLE preprocess_exception :
  99     public cpp_exception
 100 {
 101 public:
 102     enum error_code {
 103         no_error = 0,
 104         unexpected_error,
 105         macro_redefinition,
 106         macro_insertion_error,
 107         bad_include_file,
 108         bad_include_statement,
 109         ill_formed_directive,
 110         error_directive,
 111         warning_directive,
 112         ill_formed_expression,
 113         missing_matching_if,
 114         missing_matching_endif,
 115         ill_formed_operator,
 116         bad_define_statement,
 117         bad_define_statement_va_args,
 118         too_few_macroarguments,
 119         too_many_macroarguments,
 120         empty_macroarguments,
 121         improperly_terminated_macro,
 122         bad_line_statement,
 123         bad_line_number,
 124         bad_line_filename,
 125         bad_undefine_statement,
 126         bad_macro_definition,
 127         illegal_redefinition,
 128         duplicate_parameter_name,
 129         invalid_concat,
 130         last_line_not_terminated,
 131         ill_formed_pragma_option,
 132         include_nesting_too_deep,
 133         misplaced_operator,
 134         alreadydefined_name,
 135         undefined_macroname,
 136         invalid_macroname,
 137         unexpected_qualified_name,
 138         division_by_zero,
 139         integer_overflow,
 140         illegal_operator_redefinition,
 141         ill_formed_integer_literal,
 142         ill_formed_character_literal,
 143         unbalanced_if_endif,
 144         character_literal_out_of_range,
 145         could_not_open_output_file,
 146         incompatible_config,
 147         ill_formed_pragma_message,
 148         pragma_message_directive,
 149         last_error_number = pragma_message_directive
 150     };
 151
 152     preprocess_exception(char const *what_, error_code code, std::size_t line_,
 153         std::size_t column_, char const *filename_) throw()
 154     :   cpp_exception(line_, column_, filename_),
 155         code(code)
 156     {
 157         unsigned int off = 0;
 158         while (off < sizeof(buffer) - 1 && *what_)
 159             buffer[off++] = *what_++;
 160         buffer[off] = 0;
 161     }
 162     ~preprocess_exception() throw() {}
 163
 164     virtual char const *what() const throw()
 165     {
 166         return "boost::wave::preprocess_exception";
 167     }
 168     virtual char const *description() const throw()
 169     {
 170         return buffer;
 171     }
 172     virtual int get_severity() const throw()
 173     {
 174         return severity_level(code);
 175     }
 176     virtual int get_errorcode() const throw()
 177     {
 178         return code;
 179     }
 180     virtual char const* get_related_name() const throw()
 181     {
 182         return "<unknown>";
 183     }
 184     virtual bool is_recoverable() const throw()
 185     {
 186         switch (get_errorcode()) {
 187         // these are the exceptions thrown during processing not supposed to
 188         // produce any tokens on the context::iterator level
 189         case preprocess_exception::no_error:        // just a placeholder
 190         case preprocess_exception::macro_redefinition:
 191         case preprocess_exception::macro_insertion_error:
 192         case preprocess_exception::bad_macro_definition:
 193         case preprocess_exception::illegal_redefinition:
 194         case preprocess_exception::duplicate_parameter_name:
 195         case preprocess_exception::invalid_macroname:
 196         case preprocess_exception::bad_include_file:
 197         case preprocess_exception::bad_include_statement:
 198         case preprocess_exception::ill_formed_directive:
 199         case preprocess_exception::error_directive:
 200         case preprocess_exception::warning_directive:
 201         case preprocess_exception::ill_formed_expression:
 202         case preprocess_exception::missing_matching_if:
 203         case preprocess_exception::missing_matching_endif:
 204         case preprocess_exception::unbalanced_if_endif:
 205         case preprocess_exception::bad_define_statement:
 206         case preprocess_exception::bad_define_statement_va_args:
 207         case preprocess_exception::bad_line_statement:
 208         case preprocess_exception::bad_line_number:
 209         case preprocess_exception::bad_line_filename:
 210         case preprocess_exception::bad_undefine_statement:
 211         case preprocess_exception::division_by_zero:
 212         case preprocess_exception::integer_overflow:
 213         case preprocess_exception::ill_formed_integer_literal:
 214         case preprocess_exception::ill_formed_character_literal:
 215         case preprocess_exception::character_literal_out_of_range:
 216         case preprocess_exception::last_line_not_terminated:
 217         case preprocess_exception::include_nesting_too_deep:
 218         case preprocess_exception::illegal_operator_redefinition:
 219         case preprocess_exception::incompatible_config:
 220         case preprocess_exception::ill_formed_pragma_option:
 221         case preprocess_exception::ill_formed_pragma_message:
 222         case preprocess_exception::pragma_message_directive:
 223             return true;
 224
 225         case preprocess_exception::unexpected_error:
 226         case preprocess_exception::ill_formed_operator:
 227         case preprocess_exception::too_few_macroarguments:
 228         case preprocess_exception::too_many_macroarguments:
 229         case preprocess_exception::empty_macroarguments:
 230         case preprocess_exception::improperly_terminated_macro:
 231         case preprocess_exception::invalid_concat:
 232         case preprocess_exception::could_not_open_output_file:
 233             break;
 234         }
 235         return false;
 236     }
 237
 238     static char const *error_text(int code)
 239     {
 240     // error texts in this array must appear in the same order as the items in
 241     // the error enum above
 242         static char const *preprocess_exception_errors[] = {
 243             "no error",                                 // no_error
 244             "unexpected error (should not happen)",     // unexpected_error
 245             "illegal macro redefinition",               // macro_redefinition
 246             "macro definition failed (out of memory?)", // macro_insertion_error
 247             "could not find include file",              // bad_include_file
 248             "ill formed #include directive",            // bad_include_statement
 249             "ill formed preprocessor directive",        // ill_formed_directive
 250             "encountered #error directive or #pragma wave stop()", // error_directive
 251             "encountered #warning directive",           // warning_directive
 252             "ill formed preprocessor expression",       // ill_formed_expression
 253             "the #if for this directive is missing",    // missing_matching_if
 254             "detected at least one missing #endif directive",   // missing_matching_endif
 255             "ill formed preprocessing operator",        // ill_formed_operator
 256             "ill formed #define directive",             // bad_define_statement
 257             "__VA_ARGS__ can only appear in the "
 258             "expansion of a C99 variadic macro",        // bad_define_statement_va_args
 259             "too few macro arguments",                  // too_few_macroarguments
 260             "too many macro arguments",                 // too_many_macroarguments
 261             "empty macro arguments are not supported in pure C++ mode, "
 262             "use variadics mode to allow these",        // empty_macroarguments
 263             "improperly terminated macro invocation "
 264             "or replacement-list terminates in partial "
 265             "macro expansion (not supported yet)",      // improperly_terminated_macro
 266             "ill formed #line directive",               // bad_line_statement
 267             "line number argument of #line directive "
 268             "should consist out of decimal digits "
 269             "only and must be in range of [1..INT_MAX]", // bad_line_number
 270             "filename argument of #line directive should "
 271             "be a narrow string literal",               // bad_line_filename
 272             "#undef may not be used on this predefined name",   // bad_undefine_statement
 273             "invalid macro definition",                 // bad_macro_definition
 274             "this predefined name may not be redefined",        // illegal_redefinition
 275             "duplicate macro parameter name",           // duplicate_parameter_name
 276             "pasting the following two tokens does not "
 277             "give a valid preprocessing token",         // invalid_concat
 278             "last line of file ends without a newline", // last_line_not_terminated
 279             "unknown or illformed pragma option",       // ill_formed_pragma_option
 280             "include files nested too deep",            // include_nesting_too_deep
 281             "misplaced operator defined()",             // misplaced_operator
 282             "the name is already used in this scope as "
 283             "a macro or scope name",                    // alreadydefined_name
 284             "undefined macro or scope name may not be imported", // undefined_macroname
 285             "ill formed macro name",                    // invalid_macroname
 286             "qualified names are supported in C++11 mode only",  // unexpected_qualified_name
 287             "division by zero in preprocessor expression",       // division_by_zero
 288             "integer overflow in preprocessor expression",       // integer_overflow
 289             "this cannot be used as a macro name as it is "
 290             "an operator in C++",                       // illegal_operator_redefinition
 291             "ill formed integer literal or integer constant too large",   // ill_formed_integer_literal
 292             "ill formed character literal",             // ill_formed_character_literal
 293             "unbalanced #if/#endif in include file",    // unbalanced_if_endif
 294             "expression contains out of range character literal", // character_literal_out_of_range
 295             "could not open output file",               // could_not_open_output_file
 296             "incompatible state information",           // incompatible_config
 297             "illformed pragma message",                 // ill_formed_pragma_message
 298             "encountered #pragma message directive"     // pragma_message_directive
 299         };
 300         BOOST_ASSERT(no_error <= code && code <= last_error_number);
 301         return preprocess_exception_errors[code];
 302     }
 303
 304     static util::severity severity_level(int code)
 305     {
 306         static util::severity preprocess_exception_severity[] = {
 307             util::severity_remark,             // no_error
 308             util::severity_fatal,              // unexpected_error
 309             util::severity_warning,            // macro_redefinition
 310             util::severity_fatal,              // macro_insertion_error
 311             util::severity_error,              // bad_include_file
 312             util::severity_error,              // bad_include_statement
 313             util::severity_error,              // ill_formed_directive
 314             util::severity_fatal,              // error_directive
 315             util::severity_warning,            // warning_directive
 316             util::severity_error,              // ill_formed_expression
 317             util::severity_error,              // missing_matching_if
 318             util::severity_error,              // missing_matching_endif
 319             util::severity_error,              // ill_formed_operator
 320             util::severity_error,              // bad_define_statement
 321             util::severity_error,              // bad_define_statement_va_args
 322             util::severity_warning,            // too_few_macroarguments
 323             util::severity_warning,            // too_many_macroarguments
 324             util::severity_warning,            // empty_macroarguments
 325             util::severity_error,              // improperly_terminated_macro
 326             util::severity_warning,            // bad_line_statement
 327             util::severity_warning,            // bad_line_number
 328             util::severity_warning,            // bad_line_filename
 329             util::severity_warning,            // bad_undefine_statement
 330             util::severity_commandline_error,  // bad_macro_definition
 331             util::severity_warning,            // illegal_redefinition
 332             util::severity_error,              // duplicate_parameter_name
 333             util::severity_error,              // invalid_concat
 334             util::severity_warning,            // last_line_not_terminated
 335             util::severity_warning,            // ill_formed_pragma_option
 336             util::severity_fatal,              // include_nesting_too_deep
 337             util::severity_error,              // misplaced_operator
 338             util::severity_error,              // alreadydefined_name
 339             util::severity_error,              // undefined_macroname
 340             util::severity_error,              // invalid_macroname
 341             util::severity_error,              // unexpected_qualified_name
 342             util::severity_fatal,              // division_by_zero
 343             util::severity_error,              // integer_overflow
 344             util::severity_error,              // illegal_operator_redefinition
 345             util::severity_error,              // ill_formed_integer_literal
 346             util::severity_error,              // ill_formed_character_literal
 347             util::severity_warning,            // unbalanced_if_endif
 348             util::severity_warning,            // character_literal_out_of_range
 349             util::severity_error,              // could_not_open_output_file
 350             util::severity_remark,             // incompatible_config
 351             util::severity_warning,            // ill_formed_pragma_message
 352             util::severity_remark,             // pragma_message_directive
 353         };
 354         BOOST_ASSERT(no_error <= code && code <= last_error_number);
 355         return preprocess_exception_severity[code];
 356     }
 357     static char const *severity_text(int code)
 358     {
 359         return util::get_severity(severity_level(code));
 360     }
 361
 362 private:
 363     char buffer[512];
 364     error_code code;
 365 };
 366
 367 ///////////////////////////////////////////////////////////////////////////////
 368 //  Error during macro handling, this exception contains the related macro name
 369 class BOOST_SYMBOL_VISIBLE macro_handling_exception :
 370     public preprocess_exception
 371 {
 372 public:
 373     macro_handling_exception(char const *what_, error_code code, std::size_t line_,
 374         std::size_t column_, char const *filename_, char const *macroname) throw()
 375     :   preprocess_exception(what_, code, line_, column_, filename_)
 376     {
 377         unsigned int off = 0;
 378         while (off < sizeof(name) && *macroname)
 379             name[off++] = *macroname++;
 380         name[off] = 0;
 381     }
 382     ~macro_handling_exception() throw() {}
 383
 384     virtual char const *what() const throw()
 385     {
 386         return "boost::wave::macro_handling_exception";
 387     }
 388     char const* get_related_name() const throw()
 389     {
 390         return name;
 391     }
 392
 393 private:
 394     char name[512];
 395 };
 396
 397 ///////////////////////////////////////////////////////////////////////////////
 398 //
 399 //  The is_recoverable() function allows to decide, whether it is possible
 400 //  simply to continue after a given exception was thrown by Wave.
 401 //
 402 //  This is kind of a hack to allow to recover from certain errors as long as
 403 //  Wave doesn't provide better means of error recovery.
 404 //
 405 ///////////////////////////////////////////////////////////////////////////////
 406 inline bool
 407 is_recoverable(cpp_exception const& e)
 408 {
 409     return e.is_recoverable();
 410 }
 411
 412 ///////////////////////////////////////////////////////////////////////////////
 413 }   // namespace wave
 414 }   // namespace boost
 415
 416 // the suffix header occurs after all of the code
 417 #ifdef BOOST_HAS_ABI_HEADERS
 418 #include BOOST_ABI_SUFFIX
 419 #endif
 420
 421 #endif // !defined(CPP_EXCEPTIONS_HPP_5190E447_A781_4521_A275_5134FF9917D7_INCLUDED)