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252 /* This structure is nested inside struct cpp_reader, and
253    carries all the options visible to the command line.  */
254 struct cpp_options
255 {
256   /* Characters between tab stops.  */
257   unsigned int tabstop;
258 

  • C言語の種類を表す
    • ANSI CだとかC99だとか

259   /* The language we're preprocessing.  */
260   enum c_lang lang;
261 
262   /* Nonzero means use extra default include directories for C++.  */
263   unsigned char cplusplus;
264 
265   /* Nonzero means handle cplusplus style comments.  */
266   unsigned char cplusplus_comments;
267 
268   /* Nonzero means define __OBJC__, treat @ as a special token, and
269      use the OBJC[PLUS]_INCLUDE_PATH environment variable.  */
270   unsigned char objc;
271 
272   /* Nonzero means don't copy comments into the output file.  */
273   unsigned char discard_comments;
274 
275   /* Nonzero means don't copy comments into the output file during
276      macro expansion.  */
277   unsigned char discard_comments_in_macro_exp;
278 
279   /* Nonzero means process the ISO trigraph sequences.  */
280   unsigned char trigraphs;
281 
282   /* Nonzero means process the ISO digraph sequences.  */
283   unsigned char digraphs;
284 
285   /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
286   unsigned char extended_numbers;
287 
288   /* Nonzero means print names of header files (-H).  */
289   unsigned char print_include_names;
290 
291   /* Nonzero means cpp_pedwarn causes a hard error.  */
292   unsigned char pedantic_errors;
293 
294   /* Nonzero means don't print warning messages.  */
295   unsigned char inhibit_warnings;
296 
297   /* Nonzero means complain about deprecated features.  */
298   unsigned char warn_deprecated;
299 
300   /* Nonzero means don't suppress warnings from system headers.  */
301   unsigned char warn_system_headers;
302 
303   /* Nonzero means don't print error messages.  Has no option to
304      select it, but can be set by a user of cpplib (e.g. fix-header).  */
305   unsigned char inhibit_errors;
306 
307   /* Nonzero means warn if slash-star appears in a comment.  */
308   unsigned char warn_comments;
309 
310   /* Nonzero means warn if a user-supplied include directory does not
311      exist.  */
312   unsigned char warn_missing_include_dirs;
313 
314   /* Nonzero means warn if there are any trigraphs.  */
315   unsigned char warn_trigraphs;
316 
317   /* Nonzero means warn about multicharacter charconsts.  */
318   unsigned char warn_multichar;
319 

  • 真ならば警告を伝統的なCの形にする

320   /* Nonzero means warn about various incompatibilities with
321      traditional C.  */
322   unsigned char warn_traditional;
323 
324   /* Nonzero means warn about long long numeric constants.  */
325   unsigned char warn_long_long;
326 
327   /* Nonzero means warn about text after an #endif (or #else).  */
328   unsigned char warn_endif_labels;
329 
330   /* Nonzero means warn about implicit sign changes owing to integer
331      promotions.  */
332   unsigned char warn_num_sign_change;
333 
334   /* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
335      Presumably the usage is protected by the appropriate #ifdef.  */
336   unsigned char warn_variadic_macros;
337 
338   /* Nonzero means turn warnings into errors.  */
339   unsigned char warnings_are_errors;
340 
341   /* Nonzero means we should look for header.gcc files that remap file
342      names.  */
343   unsigned char remap;
344 
345   /* Zero means dollar signs are punctuation.  */
346   unsigned char dollars_in_ident;
347 
348   /* Nonzero means UCNs are accepted in identifiers.  */
349   unsigned char extended_identifiers;
350 
351   /* True if we should warn about dollars in identifiers or numbers
352      for this translation unit.  */
353   unsigned char warn_dollars;
354 
355   /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
356   unsigned char warn_undef;
357 
358   /* Nonzero means warn of unused macros from the main file.  */
359   unsigned char warn_unused_macros;
360 
361   /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
362   unsigned char c99;
363 
364   /* Nonzero if we are conforming to a specific C or C++ standard.  */
365   unsigned char std;
366 

  • 真ならばエラーメッセージをANSIに従った形にする

367   /* Nonzero means give all the error messages the ANSI standard requires.  */
368   unsigned char pedantic;
369 

  • 非ゼロならばプリプロセシング済み

370   /* Nonzero means we're looking at already preprocessed code, so don't
371      bother trying to do macro expansion and whatnot.  */
372   unsigned char preprocessed;
373 

374   /* Print column number in error messages.  */
375   unsigned char show_column;
376 
377   /* Nonzero means handle C++ alternate operator names.  */
378   unsigned char operator_names;
379 

380   /* True for traditional preprocessing.  */
381   unsigned char traditional;
382 
383   /* Holds the name of the target (execution) character set.  */
384   const char *narrow_charset;
385 
386   /* Holds the name of the target wide character set.  */
387   const char *wide_charset;
388 
389   /* Holds the name of the input character set.  */
390   const char *input_charset;
391 
392   /* The minimum permitted level of normalization before a warning
393      is generated.  */
394   enum cpp_normalize_level warn_normalize;
395 
396   /* True to warn about precompiled header files we couldn't use.  */
397   bool warn_invalid_pch;
398 
399   /* True if dependencies should be restored from a precompiled header.  */
400   bool restore_pch_deps;
401 
402   /* Dependency generation.  */
403   struct
404   {
405     /* Style of header dependencies to generate.  */
406     enum cpp_deps_style style;
407 
408     /* Assume missing files are generated files.  */
409     bool missing_files;
410 
411     /* Generate phony targets for each dependency apart from the first
412        one.  */
413     bool phony_targets;
414 
415     /* If true, no dependency is generated on the main file.  */
416     bool ignore_main_file;
417   } deps;
418 
419   /* Target-specific features set by the front end or client.  */
420 
421   /* Precision for target CPP arithmetic, target characters, target
422      ints and target wide characters, respectively.  */
423   size_t precision, char_precision, int_precision, wchar_precision;
424 
425   /* True means chars (wide chars) are unsigned.  */
426   bool unsigned_char, unsigned_wchar;
427 
428   /* True if the most significant byte in a word has the lowest
429      address in memory.  */
430   bool bytes_big_endian;
431 
432   /* Nonzero means __STDC__ should have the value 0 in system headers.  */
433   unsigned char stdc_0_in_system_headers;
434 
435   /* True means return pragmas as tokens rather than processing
436      them directly. */
437   bool defer_pragmas;
438 

439   /* True means error callback should be used for diagnostics.  */
440   bool client_diagnostic;
441 };



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