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1 /*===-- clang-c/Index.h - Indexing Public C Interface -------------*- C -*-===*\
2 |*                                                                            *|
3 |*                     The LLVM Compiler Infrastructure                       *|
4 |*                                                                            *|
5 |* This file is distributed under the University of Illinois Open Source      *|
6 |* License. See LICENSE.TXT for details.                                      *|
7 |*                                                                            *|
8 |*===----------------------------------------------------------------------===*|
9 |*                                                                            *|
10 |* This header provides a public inferface to a Clang library for extracting  *|
11 |* high-level symbol information from source files without exposing the full  *|
12 |* Clang C++ API.                                                             *|
13 |*                                                                            *|
14 \*===----------------------------------------------------------------------===*/
15 
16 #ifndef CLANG_C_INDEX_H
17 #define CLANG_C_INDEX_H
18 
19 #include <sys/stat.h>
20 #include <time.h>
21 #include <stdio.h>
22 
23 #include "clang-c/Platform.h"
24 #include "clang-c/CXString.h"
25 
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
29 
30 /** \defgroup CINDEX libclang: C Interface to Clang
31  *
32  * The C Interface to Clang provides a relatively small API that exposes
33  * facilities for parsing source code into an abstract syntax tree (AST),
34  * loading already-parsed ASTs, traversing the AST, associating
35  * physical source locations with elements within the AST, and other
36  * facilities that support Clang-based development tools.
37  *
38  * This C interface to Clang will never provide all of the information
39  * representation stored in Clang's C++ AST, nor should it: the intent is to
40  * maintain an API that is relatively stable from one release to the next,
41  * providing only the basic functionality needed to support development tools.
42  *
43  * To avoid namespace pollution, data types are prefixed with "CX" and
44  * functions are prefixed with "clang_".
45  *
46  * @{
47  */
48 
49 /**
50  * \brief An "index" that consists of a set of translation units that would
51  * typically be linked together into an executable or library.
52  */
53 typedef void *CXIndex;
54 
55 /**
56  * \brief A single translation unit, which resides in an index.
57  */
58 typedef struct CXTranslationUnitImpl *CXTranslationUnit;
59 
60 /**
61  * \brief Opaque pointer representing client data that will be passed through
62  * to various callbacks and visitors.
63  */
64 typedef void *CXClientData;
65 
66 /**
67  * \brief Provides the contents of a file that has not yet been saved to disk.
68  *
69  * Each CXUnsavedFile instance provides the name of a file on the
70  * system along with the current contents of that file that have not
71  * yet been saved to disk.
72  */
73 struct CXUnsavedFile {
74   /**
75    * \brief The file whose contents have not yet been saved.
76    *
77    * This file must already exist in the file system.
78    */
79   const char *Filename;
80 
81   /**
82    * \brief A buffer containing the unsaved contents of this file.
83    */
84   const char *Contents;
85 
86   /**
87    * \brief The length of the unsaved contents of this buffer.
88    */
89   unsigned long Length;
90 };
91 
92 /**
93  * \brief Describes the availability of a particular entity, which indicates
94  * whether the use of this entity will result in a warning or error due to
95  * it being deprecated or unavailable.
96  */
97 enum CXAvailabilityKind {
98   /**
99    * \brief The entity is available.
100    */
101   CXAvailability_Available,
102   /**
103    * \brief The entity is available, but has been deprecated (and its use is
104    * not recommended).
105    */
106   CXAvailability_Deprecated,
107   /**
108    * \brief The entity is not available; any use of it will be an error.
109    */
110   CXAvailability_NotAvailable,
111   /**
112    * \brief The entity is available, but not accessible; any use of it will be
113    * an error.
114    */
115   CXAvailability_NotAccessible
116 };
117 
118 /**
119  * \brief Describes a version number of the form major.minor.subminor.
120  */
121 typedef struct CXVersion {
122   /**
123    * \brief The major version number, e.g., the '10' in '10.7.3'. A negative
124    * value indicates that there is no version number at all.
125    */
126   int Major;
127   /**
128    * \brief The minor version number, e.g., the '7' in '10.7.3'. This value
129    * will be negative if no minor version number was provided, e.g., for
130    * version '10'.
131    */
132   int Minor;
133   /**
134    * \brief The subminor version number, e.g., the '3' in '10.7.3'. This value
135    * will be negative if no minor or subminor version number was provided,
136    * e.g., in version '10' or '10.7'.
137    */
138   int Subminor;
139 } CXVersion;
140 
141 /**
142  * \brief Provides a shared context for creating translation units.
143  *
144  * It provides two options:
145  *
146  * - excludeDeclarationsFromPCH: When non-zero, allows enumeration of "local"
147  * declarations (when loading any new translation units). A "local" declaration
148  * is one that belongs in the translation unit itself and not in a precompiled
149  * header that was used by the translation unit. If zero, all declarations
150  * will be enumerated.
151  *
152  * Here is an example:
153  *
154  * \code
155  *   // excludeDeclsFromPCH = 1, displayDiagnostics=1
156  *   Idx = clang_createIndex(1, 1);
157  *
158  *   // IndexTest.pch was produced with the following command:
159  *   // "clang -x c IndexTest.h -emit-ast -o IndexTest.pch"
160  *   TU = clang_createTranslationUnit(Idx, "IndexTest.pch");
161  *
162  *   // This will load all the symbols from 'IndexTest.pch'
163  *   clang_visitChildren(clang_getTranslationUnitCursor(TU),
164  *                       TranslationUnitVisitor, 0);
165  *   clang_disposeTranslationUnit(TU);
166  *
167  *   // This will load all the symbols from 'IndexTest.c', excluding symbols
168  *   // from 'IndexTest.pch'.
169  *   char *args[] = { "-Xclang", "-include-pch=IndexTest.pch" };
170  *   TU = clang_createTranslationUnitFromSourceFile(Idx, "IndexTest.c", 2, args,
171  *                                                  0, 0);
172  *   clang_visitChildren(clang_getTranslationUnitCursor(TU),
173  *                       TranslationUnitVisitor, 0);
174  *   clang_disposeTranslationUnit(TU);
175  * \endcode
176  *
177  * This process of creating the 'pch', loading it separately, and using it (via
178  * -include-pch) allows 'excludeDeclsFromPCH' to remove redundant callbacks
179  * (which gives the indexer the same performance benefit as the compiler).
180  */
181 CINDEX_LINKAGE CXIndex clang_createIndex(int excludeDeclarationsFromPCH,
182                                          int displayDiagnostics);
183 
184 /**
185  * \brief Destroy the given index.
186  *
187  * The index must not be destroyed until all of the translation units created
188  * within that index have been destroyed.
189  */
190 CINDEX_LINKAGE void clang_disposeIndex(CXIndex index);
191 
192 typedef enum {
193   /**
194    * \brief Used to indicate that no special CXIndex options are needed.
195    */
196   CXGlobalOpt_None = 0x0,
197 
198   /**
199    * \brief Used to indicate that threads that libclang creates for indexing
200    * purposes should use background priority.
201    *
202    * Affects #clang_indexSourceFile, #clang_indexTranslationUnit,
203    * #clang_parseTranslationUnit, #clang_saveTranslationUnit.
204    */
205   CXGlobalOpt_ThreadBackgroundPriorityForIndexing = 0x1,
206 
207   /**
208    * \brief Used to indicate that threads that libclang creates for editing
209    * purposes should use background priority.
210    *
211    * Affects #clang_reparseTranslationUnit, #clang_codeCompleteAt,
212    * #clang_annotateTokens
213    */
214   CXGlobalOpt_ThreadBackgroundPriorityForEditing = 0x2,
215 
216   /**
217    * \brief Used to indicate that all threads that libclang creates should use
218    * background priority.
219    */
220   CXGlobalOpt_ThreadBackgroundPriorityForAll =
221       CXGlobalOpt_ThreadBackgroundPriorityForIndexing |
222       CXGlobalOpt_ThreadBackgroundPriorityForEditing
223 
224 } CXGlobalOptFlags;
225 
226 /**
227  * \brief Sets general options associated with a CXIndex.
228  *
229  * For example:
230  * \code
231  * CXIndex idx = ...;
232  * clang_CXIndex_setGlobalOptions(idx,
233  *     clang_CXIndex_getGlobalOptions(idx) |
234  *     CXGlobalOpt_ThreadBackgroundPriorityForIndexing);
235  * \endcode
236  *
237  * \param options A bitmask of options, a bitwise OR of CXGlobalOpt_XXX flags.
238  */
239 CINDEX_LINKAGE void clang_CXIndex_setGlobalOptions(CXIndex, unsigned options);
240 
241 /**
242  * \brief Gets the general options associated with a CXIndex.
243  *
244  * \returns A bitmask of options, a bitwise OR of CXGlobalOpt_XXX flags that
245  * are associated with the given CXIndex object.
246  */
247 CINDEX_LINKAGE unsigned clang_CXIndex_getGlobalOptions(CXIndex);
248 
249 /**
250  * \defgroup CINDEX_FILES File manipulation routines
251  *
252  * @{
253  */
254 
255 /**
256  * \brief A particular source file that is part of a translation unit.
257  */
258 typedef void *CXFile;
259 
260 
261 /**
262  * \brief Retrieve the complete file and path name of the given file.
263  */
264 CINDEX_LINKAGE CXString clang_getFileName(CXFile SFile);
265 
266 /**
267  * \brief Retrieve the last modification time of the given file.
268  */
269 CINDEX_LINKAGE time_t clang_getFileTime(CXFile SFile);
270 
271 /**
272  * \brief Determine whether the given header is guarded against
273  * multiple inclusions, either with the conventional
274  * \#ifndef/\#define/\#endif macro guards or with \#pragma once.
275  */
276 CINDEX_LINKAGE unsigned
277 clang_isFileMultipleIncludeGuarded(CXTranslationUnit tu, CXFile file);
278 
279 /**
280  * \brief Retrieve a file handle within the given translation unit.
281  *
282  * \param tu the translation unit
283  *
284  * \param file_name the name of the file.
285  *
286  * \returns the file handle for the named file in the translation unit \p tu,
287  * or a NULL file handle if the file was not a part of this translation unit.
288  */
289 CINDEX_LINKAGE CXFile clang_getFile(CXTranslationUnit tu,
290                                     const char *file_name);
291 
292 /**
293  * @}
294  */
295 
296 /**
297  * \defgroup CINDEX_LOCATIONS Physical source locations
298  *
299  * Clang represents physical source locations in its abstract syntax tree in
300  * great detail, with file, line, and column information for the majority of
301  * the tokens parsed in the source code. These data types and functions are
302  * used to represent source location information, either for a particular
303  * point in the program or for a range of points in the program, and extract
304  * specific location information from those data types.
305  *
306  * @{
307  */
308 
309 /**
310  * \brief Identifies a specific source location within a translation
311  * unit.
312  *
313  * Use clang_getExpansionLocation() or clang_getSpellingLocation()
314  * to map a source location to a particular file, line, and column.
315  */
316 typedef struct {
317   void *ptr_data[2];
318   unsigned int_data;
319 } CXSourceLocation;
320 
321 /**
322  * \brief Identifies a half-open character range in the source code.
323  *
324  * Use clang_getRangeStart() and clang_getRangeEnd() to retrieve the
325  * starting and end locations from a source range, respectively.
326  */
327 typedef struct {
328   void *ptr_data[2];
329   unsigned begin_int_data;
330   unsigned end_int_data;
331 } CXSourceRange;
332 
333 /**
334  * \brief Retrieve a NULL (invalid) source location.
335  */
336 CINDEX_LINKAGE CXSourceLocation clang_getNullLocation();
337 
338 /**
339  * \brief Determine whether two source locations, which must refer into
340  * the same translation unit, refer to exactly the same point in the source
341  * code.
342  *
343  * \returns non-zero if the source locations refer to the same location, zero
344  * if they refer to different locations.
345  */
346 CINDEX_LINKAGE unsigned clang_equalLocations(CXSourceLocation loc1,
347                                              CXSourceLocation loc2);
348 
349 /**
350  * \brief Retrieves the source location associated with a given file/line/column
351  * in a particular translation unit.
352  */
353 CINDEX_LINKAGE CXSourceLocation clang_getLocation(CXTranslationUnit tu,
354                                                   CXFile file,
355                                                   unsigned line,
356                                                   unsigned column);
357 /**
358  * \brief Retrieves the source location associated with a given character offset
359  * in a particular translation unit.
360  */
361 CINDEX_LINKAGE CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
362                                                            CXFile file,
363                                                            unsigned offset);
364 
365 /**
366  * \brief Retrieve a NULL (invalid) source range.
367  */
368 CINDEX_LINKAGE CXSourceRange clang_getNullRange();
369 
370 /**
371  * \brief Retrieve a source range given the beginning and ending source
372  * locations.
373  */
374 CINDEX_LINKAGE CXSourceRange clang_getRange(CXSourceLocation begin,
375                                             CXSourceLocation end);
376 
377 /**
378  * \brief Determine whether two ranges are equivalent.
379  *
380  * \returns non-zero if the ranges are the same, zero if they differ.
381  */
382 CINDEX_LINKAGE unsigned clang_equalRanges(CXSourceRange range1,
383                                           CXSourceRange range2);
384 
385 /**
386  * \brief Returns non-zero if \arg range is null.
387  */
388 CINDEX_LINKAGE int clang_Range_isNull(CXSourceRange range);
389 
390 /**
391  * \brief Retrieve the file, line, column, and offset represented by
392  * the given source location.
393  *
394  * If the location refers into a macro expansion, retrieves the
395  * location of the macro expansion.
396  *
397  * \param location the location within a source file that will be decomposed
398  * into its parts.
399  *
400  * \param file [out] if non-NULL, will be set to the file to which the given
401  * source location points.
402  *
403  * \param line [out] if non-NULL, will be set to the line to which the given
404  * source location points.
405  *
406  * \param column [out] if non-NULL, will be set to the column to which the given
407  * source location points.
408  *
409  * \param offset [out] if non-NULL, will be set to the offset into the
410  * buffer to which the given source location points.
411  */
412 CINDEX_LINKAGE void clang_getExpansionLocation(CXSourceLocation location,
413                                                CXFile *file,
414                                                unsigned *line,
415                                                unsigned *column,
416                                                unsigned *offset);
417 
418 /**
419  * \brief Retrieve the file, line, column, and offset represented by
420  * the given source location, as specified in a # line directive.
421  *
422  * Example: given the following source code in a file somefile.c
423  *
424  * \code
425  * #123 "dummy.c" 1
426  *
427  * static int func(void)
428  * {
429  *     return 0;
430  * }
431  * \endcode
432  *
433  * the location information returned by this function would be
434  *
435  * File: dummy.c Line: 124 Column: 12
436  *
437  * whereas clang_getExpansionLocation would have returned
438  *
439  * File: somefile.c Line: 3 Column: 12
440  *
441  * \param location the location within a source file that will be decomposed
442  * into its parts.
443  *
444  * \param filename [out] if non-NULL, will be set to the filename of the
445  * source location. Note that filenames returned will be for "virtual" files,
446  * which don't necessarily exist on the machine running clang - e.g. when
447  * parsing preprocessed output obtained from a different environment. If
448  * a non-NULL value is passed in, remember to dispose of the returned value
449  * using \c clang_disposeString() once you've finished with it. For an invalid
450  * source location, an empty string is returned.
451  *
452  * \param line [out] if non-NULL, will be set to the line number of the
453  * source location. For an invalid source location, zero is returned.
454  *
455  * \param column [out] if non-NULL, will be set to the column number of the
456  * source location. For an invalid source location, zero is returned.
457  */
458 CINDEX_LINKAGE void clang_getPresumedLocation(CXSourceLocation location,
459                                               CXString *filename,
460                                               unsigned *line,
461                                               unsigned *column);
462 
463 /**
464  * \brief Legacy API to retrieve the file, line, column, and offset represented
465  * by the given source location.
466  *
467  * This interface has been replaced by the newer interface
468  * #clang_getExpansionLocation(). See that interface's documentation for
469  * details.
470  */
471 CINDEX_LINKAGE void clang_getInstantiationLocation(CXSourceLocation location,
472                                                    CXFile *file,
473                                                    unsigned *line,
474                                                    unsigned *column,
475                                                    unsigned *offset);
476 
477 /**
478  * \brief Retrieve the file, line, column, and offset represented by
479  * the given source location.
480  *
481  * If the location refers into a macro instantiation, return where the
482  * location was originally spelled in the source file.
483  *
484  * \param location the location within a source file that will be decomposed
485  * into its parts.
486  *
487  * \param file [out] if non-NULL, will be set to the file to which the given
488  * source location points.
489  *
490  * \param line [out] if non-NULL, will be set to the line to which the given
491  * source location points.
492  *
493  * \param column [out] if non-NULL, will be set to the column to which the given
494  * source location points.
495  *
496  * \param offset [out] if non-NULL, will be set to the offset into the
497  * buffer to which the given source location points.
498  */
499 CINDEX_LINKAGE void clang_getSpellingLocation(CXSourceLocation location,
500                                               CXFile *file,
501                                               unsigned *line,
502                                               unsigned *column,
503                                               unsigned *offset);
504 
505 /**
506  * \brief Retrieve a source location representing the first character within a
507  * source range.
508  */
509 CINDEX_LINKAGE CXSourceLocation clang_getRangeStart(CXSourceRange range);
510 
511 /**
512  * \brief Retrieve a source location representing the last character within a
513  * source range.
514  */
515 CINDEX_LINKAGE CXSourceLocation clang_getRangeEnd(CXSourceRange range);
516 
517 /**
518  * @}
519  */
520 
521 /**
522  * \defgroup CINDEX_DIAG Diagnostic reporting
523  *
524  * @{
525  */
526 
527 /**
528  * \brief Describes the severity of a particular diagnostic.
529  */
530 enum CXDiagnosticSeverity {
531   /**
532    * \brief A diagnostic that has been suppressed, e.g., by a command-line
533    * option.
534    */
535   CXDiagnostic_Ignored = 0,
536 
537   /**
538    * \brief This diagnostic is a note that should be attached to the
539    * previous (non-note) diagnostic.
540    */
541   CXDiagnostic_Note    = 1,
542 
543   /**
544    * \brief This diagnostic indicates suspicious code that may not be
545    * wrong.
546    */
547   CXDiagnostic_Warning = 2,
548 
549   /**
550    * \brief This diagnostic indicates that the code is ill-formed.
551    */
552   CXDiagnostic_Error   = 3,
553 
554   /**
555    * \brief This diagnostic indicates that the code is ill-formed such
556    * that future parser recovery is unlikely to produce useful
557    * results.
558    */
559   CXDiagnostic_Fatal   = 4
560 };
561 
562 /**
563  * \brief A single diagnostic, containing the diagnostic's severity,
564  * location, text, source ranges, and fix-it hints.
565  */
566 typedef void *CXDiagnostic;
567 
568 /**
569  * \brief A group of CXDiagnostics.
570  */
571 typedef void *CXDiagnosticSet;
572 
573 /**
574  * \brief Determine the number of diagnostics in a CXDiagnosticSet.
575  */
576 CINDEX_LINKAGE unsigned clang_getNumDiagnosticsInSet(CXDiagnosticSet Diags);
577 
578 /**
579  * \brief Retrieve a diagnostic associated with the given CXDiagnosticSet.
580  *
581  * \param Diags the CXDiagnosticSet to query.
582  * \param Index the zero-based diagnostic number to retrieve.
583  *
584  * \returns the requested diagnostic. This diagnostic must be freed
585  * via a call to \c clang_disposeDiagnostic().
586  */
587 CINDEX_LINKAGE CXDiagnostic clang_getDiagnosticInSet(CXDiagnosticSet Diags,
588                                                      unsigned Index);
589 
590 
591 /**
592  * \brief Describes the kind of error that occurred (if any) in a call to
593  * \c clang_loadDiagnostics.
594  */
595 enum CXLoadDiag_Error {
596   /**
597    * \brief Indicates that no error occurred.
598    */
599   CXLoadDiag_None = 0,
600 
601   /**
602    * \brief Indicates that an unknown error occurred while attempting to
603    * deserialize diagnostics.
604    */
605   CXLoadDiag_Unknown = 1,
606 
607   /**
608    * \brief Indicates that the file containing the serialized diagnostics
609    * could not be opened.
610    */
611   CXLoadDiag_CannotLoad = 2,
612 
613   /**
614    * \brief Indicates that the serialized diagnostics file is invalid or
615    * corrupt.
616    */
617   CXLoadDiag_InvalidFile = 3
618 };
619 
620 /**
621  * \brief Deserialize a set of diagnostics from a Clang diagnostics bitcode
622  * file.
623  *
624  * \param file The name of the file to deserialize.
625  * \param error A pointer to a enum value recording if there was a problem
626  *        deserializing the diagnostics.
627  * \param errorString A pointer to a CXString for recording the error string
628  *        if the file was not successfully loaded.
629  *
630  * \returns A loaded CXDiagnosticSet if successful, and NULL otherwise.  These
631  * diagnostics should be released using clang_disposeDiagnosticSet().
632  */
633 CINDEX_LINKAGE CXDiagnosticSet clang_loadDiagnostics(const char *file,
634                                                   enum CXLoadDiag_Error *error,
635                                                   CXString *errorString);
636 
637 /**
638  * \brief Release a CXDiagnosticSet and all of its contained diagnostics.
639  */
640 CINDEX_LINKAGE void clang_disposeDiagnosticSet(CXDiagnosticSet Diags);
641 
642 /**
643  * \brief Retrieve the child diagnostics of a CXDiagnostic.
644  *
645  * This CXDiagnosticSet does not need to be released by
646  * clang_diposeDiagnosticSet.
647  */
648 CINDEX_LINKAGE CXDiagnosticSet clang_getChildDiagnostics(CXDiagnostic D);
649 
650 /**
651  * \brief Determine the number of diagnostics produced for the given
652  * translation unit.
653  */
654 CINDEX_LINKAGE unsigned clang_getNumDiagnostics(CXTranslationUnit Unit);
655 
656 /**
657  * \brief Retrieve a diagnostic associated with the given translation unit.
658  *
659  * \param Unit the translation unit to query.
660  * \param Index the zero-based diagnostic number to retrieve.
661  *
662  * \returns the requested diagnostic. This diagnostic must be freed
663  * via a call to \c clang_disposeDiagnostic().
664  */
665 CINDEX_LINKAGE CXDiagnostic clang_getDiagnostic(CXTranslationUnit Unit,
666                                                 unsigned Index);
667 
668 /**
669  * \brief Retrieve the complete set of diagnostics associated with a
670  *        translation unit.
671  *
672  * \param Unit the translation unit to query.
673  */
674 CINDEX_LINKAGE CXDiagnosticSet
675   clang_getDiagnosticSetFromTU(CXTranslationUnit Unit);
676 
677 /**
678  * \brief Destroy a diagnostic.
679  */
680 CINDEX_LINKAGE void clang_disposeDiagnostic(CXDiagnostic Diagnostic);
681 
682 /**
683  * \brief Options to control the display of diagnostics.
684  *
685  * The values in this enum are meant to be combined to customize the
686  * behavior of \c clang_displayDiagnostic().
687  */
688 enum CXDiagnosticDisplayOptions {
689   /**
690    * \brief Display the source-location information where the
691    * diagnostic was located.
692    *
693    * When set, diagnostics will be prefixed by the file, line, and
694    * (optionally) column to which the diagnostic refers. For example,
695    *
696    * \code
697    * test.c:28: warning: extra tokens at end of #endif directive
698    * \endcode
699    *
700    * This option corresponds to the clang flag \c -fshow-source-location.
701    */
702   CXDiagnostic_DisplaySourceLocation = 0x01,
703 
704   /**
705    * \brief If displaying the source-location information of the
706    * diagnostic, also include the column number.
707    *
708    * This option corresponds to the clang flag \c -fshow-column.
709    */
710   CXDiagnostic_DisplayColumn = 0x02,
711 
712   /**
713    * \brief If displaying the source-location information of the
714    * diagnostic, also include information about source ranges in a
715    * machine-parsable format.
716    *
717    * This option corresponds to the clang flag
718    * \c -fdiagnostics-print-source-range-info.
719    */
720   CXDiagnostic_DisplaySourceRanges = 0x04,
721 
722   /**
723    * \brief Display the option name associated with this diagnostic, if any.
724    *
725    * The option name displayed (e.g., -Wconversion) will be placed in brackets
726    * after the diagnostic text. This option corresponds to the clang flag
727    * \c -fdiagnostics-show-option.
728    */
729   CXDiagnostic_DisplayOption = 0x08,
730 
731   /**
732    * \brief Display the category number associated with this diagnostic, if any.
733    *
734    * The category number is displayed within brackets after the diagnostic text.
735    * This option corresponds to the clang flag
736    * \c -fdiagnostics-show-category=id.
737    */
738   CXDiagnostic_DisplayCategoryId = 0x10,
739 
740   /**
741    * \brief Display the category name associated with this diagnostic, if any.
742    *
743    * The category name is displayed within brackets after the diagnostic text.
744    * This option corresponds to the clang flag
745    * \c -fdiagnostics-show-category=name.
746    */
747   CXDiagnostic_DisplayCategoryName = 0x20
748 };
749 
750 /**
751  * \brief Format the given diagnostic in a manner that is suitable for display.
752  *
753  * This routine will format the given diagnostic to a string, rendering
754  * the diagnostic according to the various options given. The
755  * \c clang_defaultDiagnosticDisplayOptions() function returns the set of
756  * options that most closely mimics the behavior of the clang compiler.
757  *
758  * \param Diagnostic The diagnostic to print.
759  *
760  * \param Options A set of options that control the diagnostic display,
761  * created by combining \c CXDiagnosticDisplayOptions values.
762  *
763  * \returns A new string containing for formatted diagnostic.
764  */
765 CINDEX_LINKAGE CXString clang_formatDiagnostic(CXDiagnostic Diagnostic,
766                                                unsigned Options);
767 
768 /**
769  * \brief Retrieve the set of display options most similar to the
770  * default behavior of the clang compiler.
771  *
772  * \returns A set of display options suitable for use with \c
773  * clang_displayDiagnostic().
774  */
775 CINDEX_LINKAGE unsigned clang_defaultDiagnosticDisplayOptions(void);
776 
777 /**
778  * \brief Determine the severity of the given diagnostic.
779  */
780 CINDEX_LINKAGE enum CXDiagnosticSeverity
781 clang_getDiagnosticSeverity(CXDiagnostic);
782 
783 /**
784  * \brief Retrieve the source location of the given diagnostic.
785  *
786  * This location is where Clang would print the caret ('^') when
787  * displaying the diagnostic on the command line.
788  */
789 CINDEX_LINKAGE CXSourceLocation clang_getDiagnosticLocation(CXDiagnostic);
790 
791 /**
792  * \brief Retrieve the text of the given diagnostic.
793  */
794 CINDEX_LINKAGE CXString clang_getDiagnosticSpelling(CXDiagnostic);
795 
796 /**
797  * \brief Retrieve the name of the command-line option that enabled this
798  * diagnostic.
799  *
800  * \param Diag The diagnostic to be queried.
801  *
802  * \param Disable If non-NULL, will be set to the option that disables this
803  * diagnostic (if any).
804  *
805  * \returns A string that contains the command-line option used to enable this
806  * warning, such as "-Wconversion" or "-pedantic".
807  */
808 CINDEX_LINKAGE CXString clang_getDiagnosticOption(CXDiagnostic Diag,
809                                                   CXString *Disable);
810 
811 /**
812  * \brief Retrieve the category number for this diagnostic.
813  *
814  * Diagnostics can be categorized into groups along with other, related
815  * diagnostics (e.g., diagnostics under the same warning flag). This routine
816  * retrieves the category number for the given diagnostic.
817  *
818  * \returns The number of the category that contains this diagnostic, or zero
819  * if this diagnostic is uncategorized.
820  */
821 CINDEX_LINKAGE unsigned clang_getDiagnosticCategory(CXDiagnostic);
822 
823 /**
824  * \brief Retrieve the name of a particular diagnostic category.  This
825  *  is now deprecated.  Use clang_getDiagnosticCategoryText()
826  *  instead.
827  *
828  * \param Category A diagnostic category number, as returned by
829  * \c clang_getDiagnosticCategory().
830  *
831  * \returns The name of the given diagnostic category.
832  */
833 CINDEX_DEPRECATED CINDEX_LINKAGE
834 CXString clang_getDiagnosticCategoryName(unsigned Category);
835 
836 /**
837  * \brief Retrieve the diagnostic category text for a given diagnostic.
838  *
839  * \returns The text of the given diagnostic category.
840  */
841 CINDEX_LINKAGE CXString clang_getDiagnosticCategoryText(CXDiagnostic);
842 
843 /**
844  * \brief Determine the number of source ranges associated with the given
845  * diagnostic.
846  */
847 CINDEX_LINKAGE unsigned clang_getDiagnosticNumRanges(CXDiagnostic);
848 
849 /**
850  * \brief Retrieve a source range associated with the diagnostic.
851  *
852  * A diagnostic's source ranges highlight important elements in the source
853  * code. On the command line, Clang displays source ranges by
854  * underlining them with '~' characters.
855  *
856  * \param Diagnostic the diagnostic whose range is being extracted.
857  *
858  * \param Range the zero-based index specifying which range to
859  *
860  * \returns the requested source range.
861  */
862 CINDEX_LINKAGE CXSourceRange clang_getDiagnosticRange(CXDiagnostic Diagnostic,
863                                                       unsigned Range);
864 
865 /**
866  * \brief Determine the number of fix-it hints associated with the
867  * given diagnostic.
868  */
869 CINDEX_LINKAGE unsigned clang_getDiagnosticNumFixIts(CXDiagnostic Diagnostic);
870 
871 /**
872  * \brief Retrieve the replacement information for a given fix-it.
873  *
874  * Fix-its are described in terms of a source range whose contents
875  * should be replaced by a string. This approach generalizes over
876  * three kinds of operations: removal of source code (the range covers
877  * the code to be removed and the replacement string is empty),
878  * replacement of source code (the range covers the code to be
879  * replaced and the replacement string provides the new code), and
880  * insertion (both the start and end of the range point at the
881  * insertion location, and the replacement string provides the text to
882  * insert).
883  *
884  * \param Diagnostic The diagnostic whose fix-its are being queried.
885  *
886  * \param FixIt The zero-based index of the fix-it.
887  *
888  * \param ReplacementRange The source range whose contents will be
889  * replaced with the returned replacement string. Note that source
890  * ranges are half-open ranges [a, b), so the source code should be
891  * replaced from a and up to (but not including) b.
892  *
893  * \returns A string containing text that should be replace the source
894  * code indicated by the \c ReplacementRange.
895  */
896 CINDEX_LINKAGE CXString clang_getDiagnosticFixIt(CXDiagnostic Diagnostic,
897                                                  unsigned FixIt,
898                                                CXSourceRange *ReplacementRange);
899 
900 /**
901  * @}
902  */
903 
904 /**
905  * \defgroup CINDEX_TRANSLATION_UNIT Translation unit manipulation
906  *
907  * The routines in this group provide the ability to create and destroy
908  * translation units from files, either by parsing the contents of the files or
909  * by reading in a serialized representation of a translation unit.
910  *
911  * @{
912  */
913 
914 /**
915  * \brief Get the original translation unit source file name.
916  */
917 CINDEX_LINKAGE CXString
918 clang_getTranslationUnitSpelling(CXTranslationUnit CTUnit);
919 
920 /**
921  * \brief Return the CXTranslationUnit for a given source file and the provided
922  * command line arguments one would pass to the compiler.
923  *
924  * Note: The 'source_filename' argument is optional.  If the caller provides a
925  * NULL pointer, the name of the source file is expected to reside in the
926  * specified command line arguments.
927  *
928  * Note: When encountered in 'clang_command_line_args', the following options
929  * are ignored:
930  *
931  *   '-c'
932  *   '-emit-ast'
933  *   '-fsyntax-only'
934  *   '-o \<output file>'  (both '-o' and '\<output file>' are ignored)
935  *
936  * \param CIdx The index object with which the translation unit will be
937  * associated.
938  *
939  * \param source_filename The name of the source file to load, or NULL if the
940  * source file is included in \p clang_command_line_args.
941  *
942  * \param num_clang_command_line_args The number of command-line arguments in
943  * \p clang_command_line_args.
944  *
945  * \param clang_command_line_args The command-line arguments that would be
946  * passed to the \c clang executable if it were being invoked out-of-process.
947  * These command-line options will be parsed and will affect how the translation
948  * unit is parsed. Note that the following options are ignored: '-c',
949  * '-emit-ast', '-fsyntax-only' (which is the default), and '-o \<output file>'.
950  *
951  * \param num_unsaved_files the number of unsaved file entries in \p
952  * unsaved_files.
953  *
954  * \param unsaved_files the files that have not yet been saved to disk
955  * but may be required for code completion, including the contents of
956  * those files.  The contents and name of these files (as specified by
957  * CXUnsavedFile) are copied when necessary, so the client only needs to
958  * guarantee their validity until the call to this function returns.
959  */
960 CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnitFromSourceFile(
961                                          CXIndex CIdx,
962                                          const char *source_filename,
963                                          int num_clang_command_line_args,
964                                    const char * const *clang_command_line_args,
965                                          unsigned num_unsaved_files,
966                                          struct CXUnsavedFile *unsaved_files);
967 
968 /**
969  * \brief Create a translation unit from an AST file (-emit-ast).
970  */
971 CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnit(CXIndex,
972                                              const char *ast_filename);
973 
974 /**
975  * \brief Flags that control the creation of translation units.
976  *
977  * The enumerators in this enumeration type are meant to be bitwise
978  * ORed together to specify which options should be used when
979  * constructing the translation unit.
980  */
981 enum CXTranslationUnit_Flags {
982   /**
983    * \brief Used to indicate that no special translation-unit options are
984    * needed.
985    */
986   CXTranslationUnit_None = 0x0,
987 
988   /**
989    * \brief Used to indicate that the parser should construct a "detailed"
990    * preprocessing record, including all macro definitions and instantiations.
991    *
992    * Constructing a detailed preprocessing record requires more memory
993    * and time to parse, since the information contained in the record
994    * is usually not retained. However, it can be useful for
995    * applications that require more detailed information about the
996    * behavior of the preprocessor.
997    */
998   CXTranslationUnit_DetailedPreprocessingRecord = 0x01,
999 
1000   /**
1001    * \brief Used to indicate that the translation unit is incomplete.
1002    *
1003    * When a translation unit is considered "incomplete", semantic
1004    * analysis that is typically performed at the end of the
1005    * translation unit will be suppressed. For example, this suppresses
1006    * the completion of tentative declarations in C and of
1007    * instantiation of implicitly-instantiation function templates in
1008    * C++. This option is typically used when parsing a header with the
1009    * intent of producing a precompiled header.
1010    */
1011   CXTranslationUnit_Incomplete = 0x02,
1012 
1013   /**
1014    * \brief Used to indicate that the translation unit should be built with an
1015    * implicit precompiled header for the preamble.
1016    *
1017    * An implicit precompiled header is used as an optimization when a
1018    * particular translation unit is likely to be reparsed many times
1019    * when the sources aren't changing that often. In this case, an
1020    * implicit precompiled header will be built containing all of the
1021    * initial includes at the top of the main file (what we refer to as
1022    * the "preamble" of the file). In subsequent parses, if the
1023    * preamble or the files in it have not changed, \c
1024    * clang_reparseTranslationUnit() will re-use the implicit
1025    * precompiled header to improve parsing performance.
1026    */
1027   CXTranslationUnit_PrecompiledPreamble = 0x04,
1028 
1029   /**
1030    * \brief Used to indicate that the translation unit should cache some
1031    * code-completion results with each reparse of the source file.
1032    *
1033    * Caching of code-completion results is a performance optimization that
1034    * introduces some overhead to reparsing but improves the performance of
1035    * code-completion operations.
1036    */
1037   CXTranslationUnit_CacheCompletionResults = 0x08,
1038   /**
1039    * \brief DEPRECATED: Enable precompiled preambles in C++.
1040    *
1041    * Note: this is a *temporary* option that is available only while
1042    * we are testing C++ precompiled preamble support. It is deprecated.
1043    */
1044   CXTranslationUnit_CXXPrecompiledPreamble = 0x10,
1045 
1046   /**
1047    * \brief DEPRECATED: Enabled chained precompiled preambles in C++.
1048    *
1049    * Note: this is a *temporary* option that is available only while
1050    * we are testing C++ precompiled preamble support. It is deprecated.
1051    */
1052   CXTranslationUnit_CXXChainedPCH = 0x20,
1053 
1054   /**
1055    * \brief Used to indicate that function/method bodies should be skipped while
1056    * parsing.
1057    *
1058    * This option can be used to search for declarations/definitions while
1059    * ignoring the usages.
1060    */
1061   CXTranslationUnit_SkipFunctionBodies = 0x40,
1062 
1063   /**
1064    * \brief Used to indicate that brief documentation comments should be
1065    * included into the set of code completions returned from this translation
1066    * unit.
1067    */
1068   CXTranslationUnit_IncludeBriefCommentsInCodeCompletion = 0x80
1069 };
1070 
1071 /**
1072  * \brief Returns the set of flags that is suitable for parsing a translation
1073  * unit that is being edited.
1074  *
1075  * The set of flags returned provide options for \c clang_parseTranslationUnit()
1076  * to indicate that the translation unit is likely to be reparsed many times,
1077  * either explicitly (via \c clang_reparseTranslationUnit()) or implicitly
1078  * (e.g., by code completion (\c clang_codeCompletionAt())). The returned flag
1079  * set contains an unspecified set of optimizations (e.g., the precompiled
1080  * preamble) geared toward improving the performance of these routines. The
1081  * set of optimizations enabled may change from one version to the next.
1082  */
1083 CINDEX_LINKAGE unsigned clang_defaultEditingTranslationUnitOptions(void);
1084 
1085 /**
1086  * \brief Parse the given source file and the translation unit corresponding
1087  * to that file.
1088  *
1089  * This routine is the main entry point for the Clang C API, providing the
1090  * ability to parse a source file into a translation unit that can then be
1091  * queried by other functions in the API. This routine accepts a set of
1092  * command-line arguments so that the compilation can be configured in the same
1093  * way that the compiler is configured on the command line.
1094  *
1095  * \param CIdx The index object with which the translation unit will be
1096  * associated.
1097  *
1098  * \param source_filename The name of the source file to load, or NULL if the
1099  * source file is included in \p command_line_args.
1100  *
1101  * \param command_line_args The command-line arguments that would be
1102  * passed to the \c clang executable if it were being invoked out-of-process.
1103  * These command-line options will be parsed and will affect how the translation
1104  * unit is parsed. Note that the following options are ignored: '-c',
1105  * '-emit-ast', '-fsyntax-only' (which is the default), and '-o \<output file>'.
1106  *
1107  * \param num_command_line_args The number of command-line arguments in
1108  * \p command_line_args.
1109  *
1110  * \param unsaved_files the files that have not yet been saved to disk
1111  * but may be required for parsing, including the contents of
1112  * those files.  The contents and name of these files (as specified by
1113  * CXUnsavedFile) are copied when necessary, so the client only needs to
1114  * guarantee their validity until the call to this function returns.
1115  *
1116  * \param num_unsaved_files the number of unsaved file entries in \p
1117  * unsaved_files.
1118  *
1119  * \param options A bitmask of options that affects how the translation unit
1120  * is managed but not its compilation. This should be a bitwise OR of the
1121  * CXTranslationUnit_XXX flags.
1122  *
1123  * \returns A new translation unit describing the parsed code and containing
1124  * any diagnostics produced by the compiler. If there is a failure from which
1125  * the compiler cannot recover, returns NULL.
1126  */
1127 CINDEX_LINKAGE CXTranslationUnit clang_parseTranslationUnit(CXIndex CIdx,
1128                                                     const char *source_filename,
1129                                          const char * const *command_line_args,
1130                                                       int num_command_line_args,
1131                                             struct CXUnsavedFile *unsaved_files,
1132                                                      unsigned num_unsaved_files,
1133                                                             unsigned options);
1134 
1135 /**
1136  * \brief Flags that control how translation units are saved.
1137  *
1138  * The enumerators in this enumeration type are meant to be bitwise
1139  * ORed together to specify which options should be used when
1140  * saving the translation unit.
1141  */
1142 enum CXSaveTranslationUnit_Flags {
1143   /**
1144    * \brief Used to indicate that no special saving options are needed.
1145    */
1146   CXSaveTranslationUnit_None = 0x0
1147 };
1148 
1149 /**
1150  * \brief Returns the set of flags that is suitable for saving a translation
1151  * unit.
1152  *
1153  * The set of flags returned provide options for
1154  * \c clang_saveTranslationUnit() by default. The returned flag
1155  * set contains an unspecified set of options that save translation units with
1156  * the most commonly-requested data.
1157  */
1158 CINDEX_LINKAGE unsigned clang_defaultSaveOptions(CXTranslationUnit TU);
1159 
1160 /**
1161  * \brief Describes the kind of error that occurred (if any) in a call to
1162  * \c clang_saveTranslationUnit().
1163  */
1164 enum CXSaveError {
1165   /**
1166    * \brief Indicates that no error occurred while saving a translation unit.
1167    */
1168   CXSaveError_None = 0,
1169 
1170   /**
1171    * \brief Indicates that an unknown error occurred while attempting to save
1172    * the file.
1173    *
1174    * This error typically indicates that file I/O failed when attempting to
1175    * write the file.
1176    */
1177   CXSaveError_Unknown = 1,
1178 
1179   /**
1180    * \brief Indicates that errors during translation prevented this attempt
1181    * to save the translation unit.
1182    *
1183    * Errors that prevent the translation unit from being saved can be
1184    * extracted using \c clang_getNumDiagnostics() and \c clang_getDiagnostic().
1185    */
1186   CXSaveError_TranslationErrors = 2,
1187 
1188   /**
1189    * \brief Indicates that the translation unit to be saved was somehow
1190    * invalid (e.g., NULL).
1191    */
1192   CXSaveError_InvalidTU = 3
1193 };
1194 
1195 /**
1196  * \brief Saves a translation unit into a serialized representation of
1197  * that translation unit on disk.
1198  *
1199  * Any translation unit that was parsed without error can be saved
1200  * into a file. The translation unit can then be deserialized into a
1201  * new \c CXTranslationUnit with \c clang_createTranslationUnit() or,
1202  * if it is an incomplete translation unit that corresponds to a
1203  * header, used as a precompiled header when parsing other translation
1204  * units.
1205  *
1206  * \param TU The translation unit to save.
1207  *
1208  * \param FileName The file to which the translation unit will be saved.
1209  *
1210  * \param options A bitmask of options that affects how the translation unit
1211  * is saved. This should be a bitwise OR of the
1212  * CXSaveTranslationUnit_XXX flags.
1213  *
1214  * \returns A value that will match one of the enumerators of the CXSaveError
1215  * enumeration. Zero (CXSaveError_None) indicates that the translation unit was
1216  * saved successfully, while a non-zero value indicates that a problem occurred.
1217  */
1218 CINDEX_LINKAGE int clang_saveTranslationUnit(CXTranslationUnit TU,
1219                                              const char *FileName,
1220                                              unsigned options);
1221 
1222 /**
1223  * \brief Destroy the specified CXTranslationUnit object.
1224  */
1225 CINDEX_LINKAGE void clang_disposeTranslationUnit(CXTranslationUnit);
1226 
1227 /**
1228  * \brief Flags that control the reparsing of translation units.
1229  *
1230  * The enumerators in this enumeration type are meant to be bitwise
1231  * ORed together to specify which options should be used when
1232  * reparsing the translation unit.
1233  */
1234 enum CXReparse_Flags {
1235   /**
1236    * \brief Used to indicate that no special reparsing options are needed.
1237    */
1238   CXReparse_None = 0x0
1239 };
1240 
1241 /**
1242  * \brief Returns the set of flags that is suitable for reparsing a translation
1243  * unit.
1244  *
1245  * The set of flags returned provide options for
1246  * \c clang_reparseTranslationUnit() by default. The returned flag
1247  * set contains an unspecified set of optimizations geared toward common uses
1248  * of reparsing. The set of optimizations enabled may change from one version
1249  * to the next.
1250  */
1251 CINDEX_LINKAGE unsigned clang_defaultReparseOptions(CXTranslationUnit TU);
1252 
1253 /**
1254  * \brief Reparse the source files that produced this translation unit.
1255  *
1256  * This routine can be used to re-parse the source files that originally
1257  * created the given translation unit, for example because those source files
1258  * have changed (either on disk or as passed via \p unsaved_files). The
1259  * source code will be reparsed with the same command-line options as it
1260  * was originally parsed.
1261  *
1262  * Reparsing a translation unit invalidates all cursors and source locations
1263  * that refer into that translation unit. This makes reparsing a translation
1264  * unit semantically equivalent to destroying the translation unit and then
1265  * creating a new translation unit with the same command-line arguments.
1266  * However, it may be more efficient to reparse a translation
1267  * unit using this routine.
1268  *
1269  * \param TU The translation unit whose contents will be re-parsed. The
1270  * translation unit must originally have been built with
1271  * \c clang_createTranslationUnitFromSourceFile().
1272  *
1273  * \param num_unsaved_files The number of unsaved file entries in \p
1274  * unsaved_files.
1275  *
1276  * \param unsaved_files The files that have not yet been saved to disk
1277  * but may be required for parsing, including the contents of
1278  * those files.  The contents and name of these files (as specified by
1279  * CXUnsavedFile) are copied when necessary, so the client only needs to
1280  * guarantee their validity until the call to this function returns.
1281  *
1282  * \param options A bitset of options composed of the flags in CXReparse_Flags.
1283  * The function \c clang_defaultReparseOptions() produces a default set of
1284  * options recommended for most uses, based on the translation unit.
1285  *
1286  * \returns 0 if the sources could be reparsed. A non-zero value will be
1287  * returned if reparsing was impossible, such that the translation unit is
1288  * invalid. In such cases, the only valid call for \p TU is
1289  * \c clang_disposeTranslationUnit(TU).
1290  */
1291 CINDEX_LINKAGE int clang_reparseTranslationUnit(CXTranslationUnit TU,
1292                                                 unsigned num_unsaved_files,
1293                                           struct CXUnsavedFile *unsaved_files,
1294                                                 unsigned options);
1295 
1296 /**
1297   * \brief Categorizes how memory is being used by a translation unit.
1298   */
1299 enum CXTUResourceUsageKind {
1300   CXTUResourceUsage_AST = 1,
1301   CXTUResourceUsage_Identifiers = 2,
1302   CXTUResourceUsage_Selectors = 3,
1303   CXTUResourceUsage_GlobalCompletionResults = 4,
1304   CXTUResourceUsage_SourceManagerContentCache = 5,
1305   CXTUResourceUsage_AST_SideTables = 6,
1306   CXTUResourceUsage_SourceManager_Membuffer_Malloc = 7,
1307   CXTUResourceUsage_SourceManager_Membuffer_MMap = 8,
1308   CXTUResourceUsage_ExternalASTSource_Membuffer_Malloc = 9,
1309   CXTUResourceUsage_ExternalASTSource_Membuffer_MMap = 10,
1310   CXTUResourceUsage_Preprocessor = 11,
1311   CXTUResourceUsage_PreprocessingRecord = 12,
1312   CXTUResourceUsage_SourceManager_DataStructures = 13,
1313   CXTUResourceUsage_Preprocessor_HeaderSearch = 14,
1314   CXTUResourceUsage_MEMORY_IN_BYTES_BEGIN = CXTUResourceUsage_AST,
1315   CXTUResourceUsage_MEMORY_IN_BYTES_END =
1316     CXTUResourceUsage_Preprocessor_HeaderSearch,
1317 
1318   CXTUResourceUsage_First = CXTUResourceUsage_AST,
1319   CXTUResourceUsage_Last = CXTUResourceUsage_Preprocessor_HeaderSearch
1320 };
1321 
1322 /**
1323   * \brief Returns the human-readable null-terminated C string that represents
1324   *  the name of the memory category.  This string should never be freed.
1325   */
1326 CINDEX_LINKAGE
1327 const char *clang_getTUResourceUsageName(enum CXTUResourceUsageKind kind);
1328 
1329 typedef struct CXTUResourceUsageEntry {
1330   /* \brief The memory usage category. */
1331   enum CXTUResourceUsageKind kind;
1332   /* \brief Amount of resources used.
1333       The units will depend on the resource kind. */
1334   unsigned long amount;
1335 } CXTUResourceUsageEntry;
1336 
1337 /**
1338   * \brief The memory usage of a CXTranslationUnit, broken into categories.
1339   */
1340 typedef struct CXTUResourceUsage {
1341   /* \brief Private data member, used for queries. */
1342   void *data;
1343 
1344   /* \brief The number of entries in the 'entries' array. */
1345   unsigned numEntries;
1346 
1347   /* \brief An array of key-value pairs, representing the breakdown of memory
1348             usage. */
1349   CXTUResourceUsageEntry *entries;
1350 
1351 } CXTUResourceUsage;
1352 
1353 /**
1354   * \brief Return the memory usage of a translation unit.  This object
1355   *  should be released with clang_disposeCXTUResourceUsage().
1356   */
1357 CINDEX_LINKAGE CXTUResourceUsage clang_getCXTUResourceUsage(CXTranslationUnit TU);
1358 
1359 CINDEX_LINKAGE void clang_disposeCXTUResourceUsage(CXTUResourceUsage usage);
1360 
1361 /**
1362  * @}
1363  */
1364 
1365 /**
1366  * \brief Describes the kind of entity that a cursor refers to.
1367  */
1368 enum CXCursorKind {
1369   /* Declarations */
1370   /**
1371    * \brief A declaration whose specific kind is not exposed via this
1372    * interface.
1373    *
1374    * Unexposed declarations have the same operations as any other kind
1375    * of declaration; one can extract their location information,
1376    * spelling, find their definitions, etc. However, the specific kind
1377    * of the declaration is not reported.
1378    */
1379   CXCursor_UnexposedDecl                 = 1,
1380   /** \brief A C or C++ struct. */
1381   CXCursor_StructDecl                    = 2,
1382   /** \brief A C or C++ union. */
1383   CXCursor_UnionDecl                     = 3,
1384   /** \brief A C++ class. */
1385   CXCursor_ClassDecl                     = 4,
1386   /** \brief An enumeration. */
1387   CXCursor_EnumDecl                      = 5,
1388   /**
1389    * \brief A field (in C) or non-static data member (in C++) in a
1390    * struct, union, or C++ class.
1391    */
1392   CXCursor_FieldDecl                     = 6,
1393   /** \brief An enumerator constant. */
1394   CXCursor_EnumConstantDecl              = 7,
1395   /** \brief A function. */
1396   CXCursor_FunctionDecl                  = 8,
1397   /** \brief A variable. */
1398   CXCursor_VarDecl                       = 9,
1399   /** \brief A function or method parameter. */
1400   CXCursor_ParmDecl                      = 10,
1401   /** \brief An Objective-C \@interface. */
1402   CXCursor_ObjCInterfaceDecl             = 11,
1403   /** \brief An Objective-C \@interface for a category. */
1404   CXCursor_ObjCCategoryDecl              = 12,
1405   /** \brief An Objective-C \@protocol declaration. */
1406   CXCursor_ObjCProtocolDecl              = 13,
1407   /** \brief An Objective-C \@property declaration. */
1408   CXCursor_ObjCPropertyDecl              = 14,
1409   /** \brief An Objective-C instance variable. */
1410   CXCursor_ObjCIvarDecl                  = 15,
1411   /** \brief An Objective-C instance method. */
1412   CXCursor_ObjCInstanceMethodDecl        = 16,
1413   /** \brief An Objective-C class method. */
1414   CXCursor_ObjCClassMethodDecl           = 17,
1415   /** \brief An Objective-C \@implementation. */
1416   CXCursor_ObjCImplementationDecl        = 18,
1417   /** \brief An Objective-C \@implementation for a category. */
1418   CXCursor_ObjCCategoryImplDecl          = 19,
1419   /** \brief A typedef */
1420   CXCursor_TypedefDecl                   = 20,
1421   /** \brief A C++ class method. */
1422   CXCursor_CXXMethod                     = 21,
1423   /** \brief A C++ namespace. */
1424   CXCursor_Namespace                     = 22,
1425   /** \brief A linkage specification, e.g. 'extern "C"'. */
1426   CXCursor_LinkageSpec                   = 23,
1427   /** \brief A C++ constructor. */
1428   CXCursor_Constructor                   = 24,
1429   /** \brief A C++ destructor. */
1430   CXCursor_Destructor                    = 25,
1431   /** \brief A C++ conversion function. */
1432   CXCursor_ConversionFunction            = 26,
1433   /** \brief A C++ template type parameter. */
1434   CXCursor_TemplateTypeParameter         = 27,
1435   /** \brief A C++ non-type template parameter. */
1436   CXCursor_NonTypeTemplateParameter      = 28,
1437   /** \brief A C++ template template parameter. */
1438   CXCursor_TemplateTemplateParameter     = 29,
1439   /** \brief A C++ function template. */
1440   CXCursor_FunctionTemplate              = 30,
1441   /** \brief A C++ class template. */
1442   CXCursor_ClassTemplate                 = 31,
1443   /** \brief A C++ class template partial specialization. */
1444   CXCursor_ClassTemplatePartialSpecialization = 32,
1445   /** \brief A C++ namespace alias declaration. */
1446   CXCursor_NamespaceAlias                = 33,
1447   /** \brief A C++ using directive. */
1448   CXCursor_UsingDirective                = 34,
1449   /** \brief A C++ using declaration. */
1450   CXCursor_UsingDeclaration              = 35,
1451   /** \brief A C++ alias declaration */
1452   CXCursor_TypeAliasDecl                 = 36,
1453   /** \brief An Objective-C \@synthesize definition. */
1454   CXCursor_ObjCSynthesizeDecl            = 37,
1455   /** \brief An Objective-C \@dynamic definition. */
1456   CXCursor_ObjCDynamicDecl               = 38,
1457   /** \brief An access specifier. */
1458   CXCursor_CXXAccessSpecifier            = 39,
1459 
1460   CXCursor_FirstDecl                     = CXCursor_UnexposedDecl,
1461   CXCursor_LastDecl                      = CXCursor_CXXAccessSpecifier,
1462 
1463   /* References */
1464   CXCursor_FirstRef                      = 40, /* Decl references */
1465   CXCursor_ObjCSuperClassRef             = 40,
1466   CXCursor_ObjCProtocolRef               = 41,
1467   CXCursor_ObjCClassRef                  = 42,
1468   /**
1469    * \brief A reference to a type declaration.
1470    *
1471    * A type reference occurs anywhere where a type is named but not
1472    * declared. For example, given:
1473    *
1474    * \code
1475    * typedef unsigned size_type;
1476    * size_type size;
1477    * \endcode
1478    *
1479    * The typedef is a declaration of size_type (CXCursor_TypedefDecl),
1480    * while the type of the variable "size" is referenced. The cursor
1481    * referenced by the type of size is the typedef for size_type.
1482    */
1483   CXCursor_TypeRef                       = 43,
1484   CXCursor_CXXBaseSpecifier              = 44,
1485   /**
1486    * \brief A reference to a class template, function template, template
1487    * template parameter, or class template partial specialization.
1488    */
1489   CXCursor_TemplateRef                   = 45,
1490   /**
1491    * \brief A reference to a namespace or namespace alias.
1492    */
1493   CXCursor_NamespaceRef                  = 46,
1494   /**
1495    * \brief A reference to a member of a struct, union, or class that occurs in
1496    * some non-expression context, e.g., a designated initializer.
1497    */
1498   CXCursor_MemberRef                     = 47,
1499   /**
1500    * \brief A reference to a labeled statement.
1501    *
1502    * This cursor kind is used to describe the jump to "start_over" in the
1503    * goto statement in the following example:
1504    *
1505    * \code
1506    *   start_over:
1507    *     ++counter;
1508    *
1509    *     goto start_over;
1510    * \endcode
1511    *
1512    * A label reference cursor refers to a label statement.
1513    */
1514   CXCursor_LabelRef                      = 48,
1515 
1516   /**
1517    * \brief A reference to a set of overloaded functions or function templates
1518    * that has not yet been resolved to a specific function or function template.
1519    *
1520    * An overloaded declaration reference cursor occurs in C++ templates where
1521    * a dependent name refers to a function. For example:
1522    *
1523    * \code
1524    * template<typename T> void swap(T&, T&);
1525    *
1526    * struct X { ... };
1527    * void swap(X&, X&);
1528    *
1529    * template<typename T>
1530    * void reverse(T* first, T* last) {
1531    *   while (first < last - 1) {
1532    *     swap(*first, *--last);
1533    *     ++first;
1534    *   }
1535    * }
1536    *
1537    * struct Y { };
1538    * void swap(Y&, Y&);
1539    * \endcode
1540    *
1541    * Here, the identifier "swap" is associated with an overloaded declaration
1542    * reference. In the template definition, "swap" refers to either of the two
1543    * "swap" functions declared above, so both results will be available. At
1544    * instantiation time, "swap" may also refer to other functions found via
1545    * argument-dependent lookup (e.g., the "swap" function at the end of the
1546    * example).
1547    *
1548    * The functions \c clang_getNumOverloadedDecls() and
1549    * \c clang_getOverloadedDecl() can be used to retrieve the definitions
1550    * referenced by this cursor.
1551    */
1552   CXCursor_OverloadedDeclRef             = 49,
1553 
1554   /**
1555    * \brief A reference to a variable that occurs in some non-expression
1556    * context, e.g., a C++ lambda capture list.
1557    */
1558   CXCursor_VariableRef                   = 50,
1559 
1560   CXCursor_LastRef                       = CXCursor_VariableRef,
1561 
1562   /* Error conditions */
1563   CXCursor_FirstInvalid                  = 70,
1564   CXCursor_InvalidFile                   = 70,
1565   CXCursor_NoDeclFound                   = 71,
1566   CXCursor_NotImplemented                = 72,
1567   CXCursor_InvalidCode                   = 73,
1568   CXCursor_LastInvalid                   = CXCursor_InvalidCode,
1569 
1570   /* Expressions */
1571   CXCursor_FirstExpr                     = 100,
1572 
1573   /**
1574    * \brief An expression whose specific kind is not exposed via this
1575    * interface.
1576    *
1577    * Unexposed expressions have the same operations as any other kind
1578    * of expression; one can extract their location information,
1579    * spelling, children, etc. However, the specific kind of the
1580    * expression is not reported.
1581    */
1582   CXCursor_UnexposedExpr                 = 100,
1583 
1584   /**
1585    * \brief An expression that refers to some value declaration, such
1586    * as a function, varible, or enumerator.
1587    */
1588   CXCursor_DeclRefExpr                   = 101,
1589 
1590   /**
1591    * \brief An expression that refers to a member of a struct, union,
1592    * class, Objective-C class, etc.
1593    */
1594   CXCursor_MemberRefExpr                 = 102,
1595 
1596   /** \brief An expression that calls a function. */
1597   CXCursor_CallExpr                      = 103,
1598 
1599   /** \brief An expression that sends a message to an Objective-C
1600    object or class. */
1601   CXCursor_ObjCMessageExpr               = 104,
1602 
1603   /** \brief An expression that represents a block literal. */
1604   CXCursor_BlockExpr                     = 105,
1605 
1606   /** \brief An integer literal.
1607    */
1608   CXCursor_IntegerLiteral                = 106,
1609 
1610   /** \brief A floating point number literal.
1611    */
1612   CXCursor_FloatingLiteral               = 107,
1613 
1614   /** \brief An imaginary number literal.
1615    */
1616   CXCursor_ImaginaryLiteral              = 108,
1617 
1618   /** \brief A string literal.
1619    */
1620   CXCursor_StringLiteral                 = 109,
1621 
1622   /** \brief A character literal.
1623    */
1624   CXCursor_CharacterLiteral              = 110,
1625 
1626   /** \brief A parenthesized expression, e.g. "(1)".
1627    *
1628    * This AST node is only formed if full location information is requested.
1629    */
1630   CXCursor_ParenExpr                     = 111,
1631 
1632   /** \brief This represents the unary-expression's (except sizeof and
1633    * alignof).
1634    */
1635   CXCursor_UnaryOperator                 = 112,
1636 
1637   /** \brief [C99 6.5.2.1] Array Subscripting.
1638    */
1639   CXCursor_ArraySubscriptExpr            = 113,
1640 
1641   /** \brief A builtin binary operation expression such as "x + y" or
1642    * "x <= y".
1643    */
1644   CXCursor_BinaryOperator                = 114,
1645 
1646   /** \brief Compound assignment such as "+=".
1647    */
1648   CXCursor_CompoundAssignOperator        = 115,
1649 
1650   /** \brief The ?: ternary operator.
1651    */
1652   CXCursor_ConditionalOperator           = 116,
1653 
1654   /** \brief An explicit cast in C (C99 6.5.4) or a C-style cast in C++
1655    * (C++ [expr.cast]), which uses the syntax (Type)expr.
1656    *
1657    * For example: (int)f.
1658    */
1659   CXCursor_CStyleCastExpr                = 117,
1660 
1661   /** \brief [C99 6.5.2.5]
1662    */
1663   CXCursor_CompoundLiteralExpr           = 118,
1664 
1665   /** \brief Describes an C or C++ initializer list.
1666    */
1667   CXCursor_InitListExpr                  = 119,
1668 
1669   /** \brief The GNU address of label extension, representing &&label.
1670    */
1671   CXCursor_AddrLabelExpr                 = 120,
1672 
1673   /** \brief This is the GNU Statement Expression extension: ({int X=4; X;})
1674    */
1675   CXCursor_StmtExpr                      = 121,
1676 
1677   /** \brief Represents a C11 generic selection.
1678    */
1679   CXCursor_GenericSelectionExpr          = 122,
1680 
1681   /** \brief Implements the GNU __null extension, which is a name for a null
1682    * pointer constant that has integral type (e.g., int or long) and is the same
1683    * size and alignment as a pointer.
1684    *
1685    * The __null extension is typically only used by system headers, which define
1686    * NULL as __null in C++ rather than using 0 (which is an integer that may not
1687    * match the size of a pointer).
1688    */
1689   CXCursor_GNUNullExpr                   = 123,
1690 
1691   /** \brief C++'s static_cast<> expression.
1692    */
1693   CXCursor_CXXStaticCastExpr             = 124,
1694 
1695   /** \brief C++'s dynamic_cast<> expression.
1696    */
1697   CXCursor_CXXDynamicCastExpr            = 125,
1698 
1699   /** \brief C++'s reinterpret_cast<> expression.
1700    */
1701   CXCursor_CXXReinterpretCastExpr        = 126,
1702 
1703   /** \brief C++'s const_cast<> expression.
1704    */
1705   CXCursor_CXXConstCastExpr              = 127,
1706 
1707   /** \brief Represents an explicit C++ type conversion that uses "functional"
1708    * notion (C++ [expr.type.conv]).
1709    *
1710    * Example:
1711    * \code
1712    *   x = int(0.5);
1713    * \endcode
1714    */
1715   CXCursor_CXXFunctionalCastExpr         = 128,
1716 
1717   /** \brief A C++ typeid expression (C++ [expr.typeid]).
1718    */
1719   CXCursor_CXXTypeidExpr                 = 129,
1720 
1721   /** \brief [C++ 2.13.5] C++ Boolean Literal.
1722    */
1723   CXCursor_CXXBoolLiteralExpr            = 130,
1724 
1725   /** \brief [C++0x 2.14.7] C++ Pointer Literal.
1726    */
1727   CXCursor_CXXNullPtrLiteralExpr         = 131,
1728 
1729   /** \brief Represents the "this" expression in C++
1730    */
1731   CXCursor_CXXThisExpr                   = 132,
1732 
1733   /** \brief [C++ 15] C++ Throw Expression.
1734    *
1735    * This handles 'throw' and 'throw' assignment-expression. When
1736    * assignment-expression isn't present, Op will be null.
1737    */
1738   CXCursor_CXXThrowExpr                  = 133,
1739 
1740   /** \brief A new expression for memory allocation and constructor calls, e.g:
1741    * "new CXXNewExpr(foo)".
1742    */
1743   CXCursor_CXXNewExpr                    = 134,
1744 
1745   /** \brief A delete expression for memory deallocation and destructor calls,
1746    * e.g. "delete[] pArray".
1747    */
1748   CXCursor_CXXDeleteExpr                 = 135,
1749 
1750   /** \brief A unary expression.
1751    */
1752   CXCursor_UnaryExpr                     = 136,
1753 
1754   /** \brief An Objective-C string literal i.e. @"foo".
1755    */
1756   CXCursor_ObjCStringLiteral             = 137,
1757 
1758   /** \brief An Objective-C \@encode expression.
1759    */
1760   CXCursor_ObjCEncodeExpr                = 138,
1761 
1762   /** \brief An Objective-C \@selector expression.
1763    */
1764   CXCursor_ObjCSelectorExpr              = 139,
1765 
1766   /** \brief An Objective-C \@protocol expression.
1767    */
1768   CXCursor_ObjCProtocolExpr              = 140,
1769 
1770   /** \brief An Objective-C "bridged" cast expression, which casts between
1771    * Objective-C pointers and C pointers, transferring ownership in the process.
1772    *
1773    * \code
1774    *   NSString *str = (__bridge_transfer NSString *)CFCreateString();
1775    * \endcode
1776    */
1777   CXCursor_ObjCBridgedCastExpr           = 141,
1778 
1779   /** \brief Represents a C++0x pack expansion that produces a sequence of
1780    * expressions.
1781    *
1782    * A pack expansion expression contains a pattern (which itself is an
1783    * expression) followed by an ellipsis. For example:
1784    *
1785    * \code
1786    * template<typename F, typename ...Types>
1787    * void forward(F f, Types &&...args) {
1788    *  f(static_cast<Types&&>(args)...);
1789    * }
1790    * \endcode
1791    */
1792   CXCursor_PackExpansionExpr             = 142,
1793 
1794   /** \brief Represents an expression that computes the length of a parameter
1795    * pack.
1796    *
1797    * \code
1798    * template<typename ...Types>
1799    * struct count {
1800    *   static const unsigned value = sizeof...(Types);
1801    * };
1802    * \endcode
1803    */
1804   CXCursor_SizeOfPackExpr                = 143,
1805 
1806   /* \brief Represents a C++ lambda expression that produces a local function
1807    * object.
1808    *
1809    * \code
1810    * void abssort(float *x, unsigned N) {
1811    *   std::sort(x, x + N,
1812    *             [](float a, float b) {
1813    *               return std::abs(a) < std::abs(b);
1814    *             });
1815    * }
1816    * \endcode
1817    */
1818   CXCursor_LambdaExpr                    = 144,
1819 
1820   /** \brief Objective-c Boolean Literal.
1821    */
1822   CXCursor_ObjCBoolLiteralExpr           = 145,
1823 
1824   CXCursor_LastExpr                      = CXCursor_ObjCBoolLiteralExpr,
1825 
1826   /* Statements */
1827   CXCursor_FirstStmt                     = 200,
1828   /**
1829    * \brief A statement whose specific kind is not exposed via this
1830    * interface.
1831    *
1832    * Unexposed statements have the same operations as any other kind of
1833    * statement; one can extract their location information, spelling,
1834    * children, etc. However, the specific kind of the statement is not
1835    * reported.
1836    */
1837   CXCursor_UnexposedStmt                 = 200,
1838 
1839   /** \brief A labelled statement in a function.
1840    *
1841    * This cursor kind is used to describe the "start_over:" label statement in
1842    * the following example:
1843    *
1844    * \code
1845    *   start_over:
1846    *     ++counter;
1847    * \endcode
1848    *
1849    */
1850   CXCursor_LabelStmt                     = 201,
1851 
1852   /** \brief A group of statements like { stmt stmt }.
1853    *
1854    * This cursor kind is used to describe compound statements, e.g. function
1855    * bodies.
1856    */
1857   CXCursor_CompoundStmt                  = 202,
1858 
1859   /** \brief A case statment.
1860    */
1861   CXCursor_CaseStmt                      = 203,
1862 
1863   /** \brief A default statement.
1864    */
1865   CXCursor_DefaultStmt                   = 204,
1866 
1867   /** \brief An if statement
1868    */
1869   CXCursor_IfStmt                        = 205,
1870 
1871   /** \brief A switch statement.
1872    */
1873   CXCursor_SwitchStmt                    = 206,
1874 
1875   /** \brief A while statement.
1876    */
1877   CXCursor_WhileStmt                     = 207,
1878 
1879   /** \brief A do statement.
1880    */
1881   CXCursor_DoStmt                        = 208,
1882 
1883   /** \brief A for statement.
1884    */
1885   CXCursor_ForStmt                       = 209,
1886 
1887   /** \brief A goto statement.
1888    */
1889   CXCursor_GotoStmt                      = 210,
1890 
1891   /** \brief An indirect goto statement.
1892    */
1893   CXCursor_IndirectGotoStmt              = 211,
1894 
1895   /** \brief A continue statement.
1896    */
1897   CXCursor_ContinueStmt                  = 212,
1898 
1899   /** \brief A break statement.
1900    */
1901   CXCursor_BreakStmt                     = 213,
1902 
1903   /** \brief A return statement.
1904    */
1905   CXCursor_ReturnStmt                    = 214,
1906 
1907   /** \brief A GCC inline assembly statement extension.
1908    */
1909   CXCursor_GCCAsmStmt                    = 215,
1910 
1911   /** \brief Objective-C's overall \@try-\@catch-\@finally statement.
1912    */
1913   CXCursor_ObjCAtTryStmt                 = 216,
1914 
1915   /** \brief Objective-C's \@catch statement.
1916    */
1917   CXCursor_ObjCAtCatchStmt               = 217,
1918 
1919   /** \brief Objective-C's \@finally statement.
1920    */
1921   CXCursor_ObjCAtFinallyStmt             = 218,
1922 
1923   /** \brief Objective-C's \@throw statement.
1924    */
1925   CXCursor_ObjCAtThrowStmt               = 219,
1926 
1927   /** \brief Objective-C's \@synchronized statement.
1928    */
1929   CXCursor_ObjCAtSynchronizedStmt        = 220,
1930 
1931   /** \brief Objective-C's autorelease pool statement.
1932    */
1933   CXCursor_ObjCAutoreleasePoolStmt       = 221,
1934 
1935   /** \brief Objective-C's collection statement.
1936    */
1937   CXCursor_ObjCForCollectionStmt         = 222,
1938 
1939   /** \brief C++'s catch statement.
1940    */
1941   CXCursor_CXXCatchStmt                  = 223,
1942 
1943   /** \brief C++'s try statement.
1944    */
1945   CXCursor_CXXTryStmt                    = 224,
1946 
1947   /** \brief C++'s for (* : *) statement.
1948    */
1949   CXCursor_CXXForRangeStmt               = 225,
1950 
1951   /** \brief Windows Structured Exception Handling's try statement.
1952    */
1953   CXCursor_SEHTryStmt                    = 226,
1954 
1955   /** \brief Windows Structured Exception Handling's except statement.
1956    */
1957   CXCursor_SEHExceptStmt                 = 227,
1958 
1959   /** \brief Windows Structured Exception Handling's finally statement.
1960    */
1961   CXCursor_SEHFinallyStmt                = 228,
1962 
1963   /** \brief A MS inline assembly statement extension.
1964    */
1965   CXCursor_MSAsmStmt                     = 229,
1966 
1967   /** \brief The null satement ";": C99 6.8.3p3.
1968    *
1969    * This cursor kind is used to describe the null statement.
1970    */
1971   CXCursor_NullStmt                      = 230,
1972 
1973   /** \brief Adaptor class for mixing declarations with statements and
1974    * expressions.
1975    */
1976   CXCursor_DeclStmt                      = 231,
1977 
1978   CXCursor_LastStmt                      = CXCursor_DeclStmt,
1979 
1980   /**
1981    * \brief Cursor that represents the translation unit itself.
1982    *
1983    * The translation unit cursor exists primarily to act as the root
1984    * cursor for traversing the contents of a translation unit.
1985    */
1986   CXCursor_TranslationUnit               = 300,
1987 
1988   /* Attributes */
1989   CXCursor_FirstAttr                     = 400,
1990   /**
1991    * \brief An attribute whose specific kind is not exposed via this
1992    * interface.
1993    */
1994   CXCursor_UnexposedAttr                 = 400,
1995 
1996   CXCursor_IBActionAttr                  = 401,
1997   CXCursor_IBOutletAttr                  = 402,
1998   CXCursor_IBOutletCollectionAttr        = 403,
1999   CXCursor_CXXFinalAttr                  = 404,
2000   CXCursor_CXXOverrideAttr               = 405,
2001   CXCursor_AnnotateAttr                  = 406,
2002   CXCursor_AsmLabelAttr                  = 407,
2003   CXCursor_LastAttr                      = CXCursor_AsmLabelAttr,
2004 
2005   /* Preprocessing */
2006   CXCursor_PreprocessingDirective        = 500,
2007   CXCursor_MacroDefinition               = 501,
2008   CXCursor_MacroExpansion                = 502,
2009   CXCursor_MacroInstantiation            = CXCursor_MacroExpansion,
2010   CXCursor_InclusionDirective            = 503,
2011   CXCursor_FirstPreprocessing            = CXCursor_PreprocessingDirective,
2012   CXCursor_LastPreprocessing             = CXCursor_InclusionDirective
2013 };
2014 
2015 /**
2016  * \brief A cursor representing some element in the abstract syntax tree for
2017  * a translation unit.
2018  *
2019  * The cursor abstraction unifies the different kinds of entities in a
2020  * program--declaration, statements, expressions, references to declarations,
2021  * etc.--under a single "cursor" abstraction with a common set of operations.
2022  * Common operation for a cursor include: getting the physical location in
2023  * a source file where the cursor points, getting the name associated with a
2024  * cursor, and retrieving cursors for any child nodes of a particular cursor.
2025  *
2026  * Cursors can be produced in two specific ways.
2027  * clang_getTranslationUnitCursor() produces a cursor for a translation unit,
2028  * from which one can use clang_visitChildren() to explore the rest of the
2029  * translation unit. clang_getCursor() maps from a physical source location
2030  * to the entity that resides at that location, allowing one to map from the
2031  * source code into the AST.
2032  */
2033 typedef struct {
2034   enum CXCursorKind kind;
2035   int xdata;
2036   void *data[3];
2037 } CXCursor;
2038 
2039 /**
2040  * \brief A comment AST node.
2041  */
2042 typedef struct {
2043   const void *ASTNode;
2044   CXTranslationUnit TranslationUnit;
2045 } CXComment;
2046 
2047 /**
2048  * \defgroup CINDEX_CURSOR_MANIP Cursor manipulations
2049  *
2050  * @{
2051  */
2052 
2053 /**
2054  * \brief Retrieve the NULL cursor, which represents no entity.
2055  */
2056 CINDEX_LINKAGE CXCursor clang_getNullCursor(void);
2057 
2058 /**
2059  * \brief Retrieve the cursor that represents the given translation unit.
2060  *
2061  * The translation unit cursor can be used to start traversing the
2062  * various declarations within the given translation unit.
2063  */
2064 CINDEX_LINKAGE CXCursor clang_getTranslationUnitCursor(CXTranslationUnit);
2065 
2066 /**
2067  * \brief Determine whether two cursors are equivalent.
2068  */
2069 CINDEX_LINKAGE unsigned clang_equalCursors(CXCursor, CXCursor);
2070 
2071 /**
2072  * \brief Returns non-zero if \arg cursor is null.
2073  */
2074 CINDEX_LINKAGE int clang_Cursor_isNull(CXCursor);
2075 
2076 /**
2077  * \brief Compute a hash value for the given cursor.
2078  */
2079 CINDEX_LINKAGE unsigned clang_hashCursor(CXCursor);
2080 
2081 /**
2082  * \brief Retrieve the kind of the given cursor.
2083  */
2084 CINDEX_LINKAGE enum CXCursorKind clang_getCursorKind(CXCursor);
2085 
2086 /**
2087  * \brief Determine whether the given cursor kind represents a declaration.
2088  */
2089 CINDEX_LINKAGE unsigned clang_isDeclaration(enum CXCursorKind);
2090 
2091 /**
2092  * \brief Determine whether the given cursor kind represents a simple
2093  * reference.
2094  *
2095  * Note that other kinds of cursors (such as expressions) can also refer to
2096  * other cursors. Use clang_getCursorReferenced() to determine whether a
2097  * particular cursor refers to another entity.
2098  */
2099 CINDEX_LINKAGE unsigned clang_isReference(enum CXCursorKind);
2100 
2101 /**
2102  * \brief Determine whether the given cursor kind represents an expression.
2103  */
2104 CINDEX_LINKAGE unsigned clang_isExpression(enum CXCursorKind);
2105 
2106 /**
2107  * \brief Determine whether the given cursor kind represents a statement.
2108  */
2109 CINDEX_LINKAGE unsigned clang_isStatement(enum CXCursorKind);
2110 
2111 /**
2112  * \brief Determine whether the given cursor kind represents an attribute.
2113  */
2114 CINDEX_LINKAGE unsigned clang_isAttribute(enum CXCursorKind);
2115 
2116 /**
2117  * \brief Determine whether the given cursor kind represents an invalid
2118  * cursor.
2119  */
2120 CINDEX_LINKAGE unsigned clang_isInvalid(enum CXCursorKind);
2121 
2122 /**
2123  * \brief Determine whether the given cursor kind represents a translation
2124  * unit.
2125  */
2126 CINDEX_LINKAGE unsigned clang_isTranslationUnit(enum CXCursorKind);
2127 
2128 /***
2129  * \brief Determine whether the given cursor represents a preprocessing
2130  * element, such as a preprocessor directive or macro instantiation.
2131  */
2132 CINDEX_LINKAGE unsigned clang_isPreprocessing(enum CXCursorKind);
2133 
2134 /***
2135  * \brief Determine whether the given cursor represents a currently
2136  *  unexposed piece of the AST (e.g., CXCursor_UnexposedStmt).
2137  */
2138 CINDEX_LINKAGE unsigned clang_isUnexposed(enum CXCursorKind);
2139 
2140 /**
2141  * \brief Describe the linkage of the entity referred to by a cursor.
2142  */
2143 enum CXLinkageKind {
2144   /** \brief This value indicates that no linkage information is available
2145    * for a provided CXCursor. */
2146   CXLinkage_Invalid,
2147   /**
2148    * \brief This is the linkage for variables, parameters, and so on that
2149    *  have automatic storage.  This covers normal (non-extern) local variables.
2150    */
2151   CXLinkage_NoLinkage,
2152   /** \brief This is the linkage for static variables and static functions. */
2153   CXLinkage_Internal,
2154   /** \brief This is the linkage for entities with external linkage that live
2155    * in C++ anonymous namespaces.*/
2156   CXLinkage_UniqueExternal,
2157   /** \brief This is the linkage for entities with true, external linkage. */
2158   CXLinkage_External
2159 };
2160 
2161 /**
2162  * \brief Determine the linkage of the entity referred to by a given cursor.
2163  */
2164 CINDEX_LINKAGE enum CXLinkageKind clang_getCursorLinkage(CXCursor cursor);
2165 
2166 /**
2167  * \brief Determine the availability of the entity that this cursor refers to,
2168  * taking the current target platform into account.
2169  *
2170  * \param cursor The cursor to query.
2171  *
2172  * \returns The availability of the cursor.
2173  */
2174 CINDEX_LINKAGE enum CXAvailabilityKind
2175 clang_getCursorAvailability(CXCursor cursor);
2176 
2177 /**
2178  * Describes the availability of a given entity on a particular platform, e.g.,
2179  * a particular class might only be available on Mac OS 10.7 or newer.
2180  */
2181 typedef struct CXPlatformAvailability {
2182   /**
2183    * \brief A string that describes the platform for which this structure
2184    * provides availability information.
2185    *
2186    * Possible values are "ios" or "macosx".
2187    */
2188   CXString Platform;
2189   /**
2190    * \brief The version number in which this entity was introduced.
2191    */
2192   CXVersion Introduced;
2193   /**
2194    * \brief The version number in which this entity was deprecated (but is
2195    * still available).
2196    */
2197   CXVersion Deprecated;
2198   /**
2199    * \brief The version number in which this entity was obsoleted, and therefore
2200    * is no longer available.
2201    */
2202   CXVersion Obsoleted;
2203   /**
2204    * \brief Whether the entity is unconditionally unavailable on this platform.
2205    */
2206   int Unavailable;
2207   /**
2208    * \brief An optional message to provide to a user of this API, e.g., to
2209    * suggest replacement APIs.
2210    */
2211   CXString Message;
2212 } CXPlatformAvailability;
2213 
2214 /**
2215  * \brief Determine the availability of the entity that this cursor refers to
2216  * on any platforms for which availability information is known.
2217  *
2218  * \param cursor The cursor to query.
2219  *
2220  * \param always_deprecated If non-NULL, will be set to indicate whether the
2221  * entity is deprecated on all platforms.
2222  *
2223  * \param deprecated_message If non-NULL, will be set to the message text
2224  * provided along with the unconditional deprecation of this entity. The client
2225  * is responsible for deallocating this string.
2226  *
2227  * \param always_unavailable If non-NULL, will be set to indicate whether the
2228  * entity is unavailable on all platforms.
2229  *
2230  * \param unavailable_message If non-NULL, will be set to the message text
2231  * provided along with the unconditional unavailability of this entity. The
2232  * client is responsible for deallocating this string.
2233  *
2234  * \param availability If non-NULL, an array of CXPlatformAvailability instances
2235  * that will be populated with platform availability information, up to either
2236  * the number of platforms for which availability information is available (as
2237  * returned by this function) or \c availability_size, whichever is smaller.
2238  *
2239  * \param availability_size The number of elements available in the
2240  * \c availability array.
2241  *
2242  * \returns The number of platforms (N) for which availability information is
2243  * available (which is unrelated to \c availability_size).
2244  *
2245  * Note that the client is responsible for calling
2246  * \c clang_disposeCXPlatformAvailability to free each of the
2247  * platform-availability structures returned. There are
2248  * \c min(N, availability_size) such structures.
2249  */
2250 CINDEX_LINKAGE int
2251 clang_getCursorPlatformAvailability(CXCursor cursor,
2252                                     int *always_deprecated,
2253                                     CXString *deprecated_message,
2254                                     int *always_unavailable,
2255                                     CXString *unavailable_message,
2256                                     CXPlatformAvailability *availability,
2257                                     int availability_size);
2258 
2259 /**
2260  * \brief Free the memory associated with a \c CXPlatformAvailability structure.
2261  */
2262 CINDEX_LINKAGE void
2263 clang_disposeCXPlatformAvailability(CXPlatformAvailability *availability);
2264 
2265 /**
2266  * \brief Describe the "language" of the entity referred to by a cursor.
2267  */
2268 CINDEX_LINKAGE enum CXLanguageKind {
2269   CXLanguage_Invalid = 0,
2270   CXLanguage_C,
2271   CXLanguage_ObjC,
2272   CXLanguage_CPlusPlus
2273 };
2274 
2275 /**
2276  * \brief Determine the "language" of the entity referred to by a given cursor.
2277  */
2278 CINDEX_LINKAGE enum CXLanguageKind clang_getCursorLanguage(CXCursor cursor);
2279 
2280 /**
2281  * \brief Returns the translation unit that a cursor originated from.
2282  */
2283 CINDEX_LINKAGE CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor);
2284 
2285 
2286 /**
2287  * \brief A fast container representing a set of CXCursors.
2288  */
2289 typedef struct CXCursorSetImpl *CXCursorSet;
2290 
2291 /**
2292  * \brief Creates an empty CXCursorSet.
2293  */
2294 CINDEX_LINKAGE CXCursorSet clang_createCXCursorSet();
2295 
2296 /**
2297  * \brief Disposes a CXCursorSet and releases its associated memory.
2298  */
2299 CINDEX_LINKAGE void clang_disposeCXCursorSet(CXCursorSet cset);
2300 
2301 /**
2302  * \brief Queries a CXCursorSet to see if it contains a specific CXCursor.
2303  *
2304  * \returns non-zero if the set contains the specified cursor.
2305 */
2306 CINDEX_LINKAGE unsigned clang_CXCursorSet_contains(CXCursorSet cset,
2307                                                    CXCursor cursor);
2308 
2309 /**
2310  * \brief Inserts a CXCursor into a CXCursorSet.
2311  *
2312  * \returns zero if the CXCursor was already in the set, and non-zero otherwise.
2313 */
2314 CINDEX_LINKAGE unsigned clang_CXCursorSet_insert(CXCursorSet cset,
2315                                                  CXCursor cursor);
2316 
2317 /**
2318  * \brief Determine the semantic parent of the given cursor.
2319  *
2320  * The semantic parent of a cursor is the cursor that semantically contains
2321  * the given \p cursor. For many declarations, the lexical and semantic parents
2322  * are equivalent (the lexical parent is returned by
2323  * \c clang_getCursorLexicalParent()). They diverge when declarations or
2324  * definitions are provided out-of-line. For example:
2325  *
2326  * \code
2327  * class C {
2328  *  void f();
2329  * };
2330  *
2331  * void C::f() { }
2332  * \endcode
2333  *
2334  * In the out-of-line definition of \c C::f, the semantic parent is the
2335  * the class \c C, of which this function is a member. The lexical parent is
2336  * the place where the declaration actually occurs in the source code; in this
2337  * case, the definition occurs in the translation unit. In general, the
2338  * lexical parent for a given entity can change without affecting the semantics
2339  * of the program, and the lexical parent of different declarations of the
2340  * same entity may be different. Changing the semantic parent of a declaration,
2341  * on the other hand, can have a major impact on semantics, and redeclarations
2342  * of a particular entity should all have the same semantic context.
2343  *
2344  * In the example above, both declarations of \c C::f have \c C as their
2345  * semantic context, while the lexical context of the first \c C::f is \c C
2346  * and the lexical context of the second \c C::f is the translation unit.
2347  *
2348  * For global declarations, the semantic parent is the translation unit.
2349  */
2350 CINDEX_LINKAGE CXCursor clang_getCursorSemanticParent(CXCursor cursor);
2351 
2352 /**
2353  * \brief Determine the lexical parent of the given cursor.
2354  *
2355  * The lexical parent of a cursor is the cursor in which the given \p cursor
2356  * was actually written. For many declarations, the lexical and semantic parents
2357  * are equivalent (the semantic parent is returned by
2358  * \c clang_getCursorSemanticParent()). They diverge when declarations or
2359  * definitions are provided out-of-line. For example:
2360  *
2361  * \code
2362  * class C {
2363  *  void f();
2364  * };
2365  *
2366  * void C::f() { }
2367  * \endcode
2368  *
2369  * In the out-of-line definition of \c C::f, the semantic parent is the
2370  * the class \c C, of which this function is a member. The lexical parent is
2371  * the place where the declaration actually occurs in the source code; in this
2372  * case, the definition occurs in the translation unit. In general, the
2373  * lexical parent for a given entity can change without affecting the semantics
2374  * of the program, and the lexical parent of different declarations of the
2375  * same entity may be different. Changing the semantic parent of a declaration,
2376  * on the other hand, can have a major impact on semantics, and redeclarations
2377  * of a particular entity should all have the same semantic context.
2378  *
2379  * In the example above, both declarations of \c C::f have \c C as their
2380  * semantic context, while the lexical context of the first \c C::f is \c C
2381  * and the lexical context of the second \c C::f is the translation unit.
2382  *
2383  * For declarations written in the global scope, the lexical parent is
2384  * the translation unit.
2385  */
2386 CINDEX_LINKAGE CXCursor clang_getCursorLexicalParent(CXCursor cursor);
2387 
2388 /**
2389  * \brief Determine the set of methods that are overridden by the given
2390  * method.
2391  *
2392  * In both Objective-C and C++, a method (aka virtual member function,
2393  * in C++) can override a virtual method in a base class. For
2394  * Objective-C, a method is said to override any method in the class's
2395  * base class, its protocols, or its categories' protocols, that has the same
2396  * selector and is of the same kind (class or instance).
2397  * If no such method exists, the search continues to the class's superclass,
2398  * its protocols, and its categories, and so on. A method from an Objective-C
2399  * implementation is considered to override the same methods as its
2400  * corresponding method in the interface.
2401  *
2402  * For C++, a virtual member function overrides any virtual member
2403  * function with the same signature that occurs in its base
2404  * classes. With multiple inheritance, a virtual member function can
2405  * override several virtual member functions coming from different
2406  * base classes.
2407  *
2408  * In all cases, this function determines the immediate overridden
2409  * method, rather than all of the overridden methods. For example, if
2410  * a method is originally declared in a class A, then overridden in B
2411  * (which in inherits from A) and also in C (which inherited from B),
2412  * then the only overridden method returned from this function when
2413  * invoked on C's method will be B's method. The client may then
2414  * invoke this function again, given the previously-found overridden
2415  * methods, to map out the complete method-override set.
2416  *
2417  * \param cursor A cursor representing an Objective-C or C++
2418  * method. This routine will compute the set of methods that this
2419  * method overrides.
2420  *
2421  * \param overridden A pointer whose pointee will be replaced with a
2422  * pointer to an array of cursors, representing the set of overridden
2423  * methods. If there are no overridden methods, the pointee will be
2424  * set to NULL. The pointee must be freed via a call to
2425  * \c clang_disposeOverriddenCursors().
2426  *
2427  * \param num_overridden A pointer to the number of overridden
2428  * functions, will be set to the number of overridden functions in the
2429  * array pointed to by \p overridden.
2430  */
2431 CINDEX_LINKAGE void clang_getOverriddenCursors(CXCursor cursor,
2432                                                CXCursor **overridden,
2433                                                unsigned *num_overridden);
2434 
2435 /**
2436  * \brief Free the set of overridden cursors returned by \c
2437  * clang_getOverriddenCursors().
2438  */
2439 CINDEX_LINKAGE void clang_disposeOverriddenCursors(CXCursor *overridden);
2440 
2441 /**
2442  * \brief Retrieve the file that is included by the given inclusion directive
2443  * cursor.
2444  */
2445 CINDEX_LINKAGE CXFile clang_getIncludedFile(CXCursor cursor);
2446 
2447 /**
2448  * @}
2449  */
2450 
2451 /**
2452  * \defgroup CINDEX_CURSOR_SOURCE Mapping between cursors and source code
2453  *
2454  * Cursors represent a location within the Abstract Syntax Tree (AST). These
2455  * routines help map between cursors and the physical locations where the
2456  * described entities occur in the source code. The mapping is provided in
2457  * both directions, so one can map from source code to the AST and back.
2458  *
2459  * @{
2460  */
2461 
2462 /**
2463  * \brief Map a source location to the cursor that describes the entity at that
2464  * location in the source code.
2465  *
2466  * clang_getCursor() maps an arbitrary source location within a translation
2467  * unit down to the most specific cursor that describes the entity at that
2468  * location. For example, given an expression \c x + y, invoking
2469  * clang_getCursor() with a source location pointing to "x" will return the
2470  * cursor for "x"; similarly for "y". If the cursor points anywhere between
2471  * "x" or "y" (e.g., on the + or the whitespace around it), clang_getCursor()
2472  * will return a cursor referring to the "+" expression.
2473  *
2474  * \returns a cursor representing the entity at the given source location, or
2475  * a NULL cursor if no such entity can be found.
2476  */
2477 CINDEX_LINKAGE CXCursor clang_getCursor(CXTranslationUnit, CXSourceLocation);
2478 
2479 /**
2480  * \brief Retrieve the physical location of the source constructor referenced
2481  * by the given cursor.
2482  *
2483  * The location of a declaration is typically the location of the name of that
2484  * declaration, where the name of that declaration would occur if it is
2485  * unnamed, or some keyword that introduces that particular declaration.
2486  * The location of a reference is where that reference occurs within the
2487  * source code.
2488  */
2489 CINDEX_LINKAGE CXSourceLocation clang_getCursorLocation(CXCursor);
2490 
2491 /**
2492  * \brief Retrieve the physical extent of the source construct referenced by
2493  * the given cursor.
2494  *
2495  * The extent of a cursor starts with the file/line/column pointing at the
2496  * first character within the source construct that the cursor refers to and
2497  * ends with the last character withinin that source construct. For a
2498  * declaration, the extent covers the declaration itself. For a reference,
2499  * the extent covers the location of the reference (e.g., where the referenced
2500  * entity was actually used).
2501  */
2502 CINDEX_LINKAGE CXSourceRange clang_getCursorExtent(CXCursor);
2503 
2504 /**
2505  * @}
2506  */
2507 
2508 /**
2509  * \defgroup CINDEX_TYPES Type information for CXCursors
2510  *
2511  * @{
2512  */
2513 
2514 /**
2515  * \brief Describes the kind of type
2516  */
2517 enum CXTypeKind {
2518   /**
2519    * \brief Reprents an invalid type (e.g., where no type is available).
2520    */
2521   CXType_Invalid = 0,
2522 
2523   /**
2524    * \brief A type whose specific kind is not exposed via this
2525    * interface.
2526    */
2527   CXType_Unexposed = 1,
2528 
2529   /* Builtin types */
2530   CXType_Void = 2,
2531   CXType_Bool = 3,
2532   CXType_Char_U = 4,
2533   CXType_UChar = 5,
2534   CXType_Char16 = 6,
2535   CXType_Char32 = 7,
2536   CXType_UShort = 8,
2537   CXType_UInt = 9,
2538   CXType_ULong = 10,
2539   CXType_ULongLong = 11,
2540   CXType_UInt128 = 12,
2541   CXType_Char_S = 13,
2542   CXType_SChar = 14,
2543   CXType_WChar = 15,
2544   CXType_Short = 16,
2545   CXType_Int = 17,
2546   CXType_Long = 18,
2547   CXType_LongLong = 19,
2548   CXType_Int128 = 20,
2549   CXType_Float = 21,
2550   CXType_Double = 22,
2551   CXType_LongDouble = 23,
2552   CXType_NullPtr = 24,
2553   CXType_Overload = 25,
2554   CXType_Dependent = 26,
2555   CXType_ObjCId = 27,
2556   CXType_ObjCClass = 28,
2557   CXType_ObjCSel = 29,
2558   CXType_FirstBuiltin = CXType_Void,
2559   CXType_LastBuiltin  = CXType_ObjCSel,
2560 
2561   CXType_Complex = 100,
2562   CXType_Pointer = 101,
2563   CXType_BlockPointer = 102,
2564   CXType_LValueReference = 103,
2565   CXType_RValueReference = 104,
2566   CXType_Record = 105,
2567   CXType_Enum = 106,
2568   CXType_Typedef = 107,
2569   CXType_ObjCInterface = 108,
2570   CXType_ObjCObjectPointer = 109,
2571   CXType_FunctionNoProto = 110,
2572   CXType_FunctionProto = 111,
2573   CXType_ConstantArray = 112,
2574   CXType_Vector = 113
2575 };
2576 
2577 /**
2578  * \brief Describes the calling convention of a function type
2579  */
2580 enum CXCallingConv {
2581   CXCallingConv_Default = 0,
2582   CXCallingConv_C = 1,
2583   CXCallingConv_X86StdCall = 2,
2584   CXCallingConv_X86FastCall = 3,
2585   CXCallingConv_X86ThisCall = 4,
2586   CXCallingConv_X86Pascal = 5,
2587   CXCallingConv_AAPCS = 6,
2588   CXCallingConv_AAPCS_VFP = 7,
2589 
2590   CXCallingConv_Invalid = 100,
2591   CXCallingConv_Unexposed = 200
2592 };
2593 
2594 
2595 /**
2596  * \brief The type of an element in the abstract syntax tree.
2597  *
2598  */
2599 typedef struct {
2600   enum CXTypeKind kind;
2601   void *data[2];
2602 } CXType;
2603 
2604 /**
2605  * \brief Retrieve the type of a CXCursor (if any).
2606  */
2607 CINDEX_LINKAGE CXType clang_getCursorType(CXCursor C);
2608 
2609 /**
2610  * \brief Retrieve the underlying type of a typedef declaration.
2611  *
2612  * If the cursor does not reference a typedef declaration, an invalid type is
2613  * returned.
2614  */
2615 CINDEX_LINKAGE CXType clang_getTypedefDeclUnderlyingType(CXCursor C);
2616 
2617 /**
2618  * \brief Retrieve the integer type of an enum declaration.
2619  *
2620  * If the cursor does not reference an enum declaration, an invalid type is
2621  * returned.
2622  */
2623 CINDEX_LINKAGE CXType clang_getEnumDeclIntegerType(CXCursor C);
2624 
2625 /**
2626  * \brief Retrieve the integer value of an enum constant declaration as a signed
2627  *  long long.
2628  *
2629  * If the cursor does not reference an enum constant declaration, LLONG_MIN is returned.
2630  * Since this is also potentially a valid constant value, the kind of the cursor
2631  * must be verified before calling this function.
2632  */
2633 CINDEX_LINKAGE long long clang_getEnumConstantDeclValue(CXCursor C);
2634 
2635 /**
2636  * \brief Retrieve the integer value of an enum constant declaration as an unsigned
2637  *  long long.
2638  *
2639  * If the cursor does not reference an enum constant declaration, ULLONG_MAX is returned.
2640  * Since this is also potentially a valid constant value, the kind of the cursor
2641  * must be verified before calling this function.
2642  */
2643 CINDEX_LINKAGE unsigned long long clang_getEnumConstantDeclUnsignedValue(CXCursor C);
2644 
2645 /**
2646  * \brief Retrieve the number of non-variadic arguments associated with a given
2647  * cursor.
2648  *
2649  * If a cursor that is not a function or method is passed in, -1 is returned.
2650  */
2651 CINDEX_LINKAGE int clang_Cursor_getNumArguments(CXCursor C);
2652 
2653 /**
2654  * \brief Retrieve the argument cursor of a function or method.
2655  *
2656  * If a cursor that is not a function or method is passed in or the index
2657  * exceeds the number of arguments, an invalid cursor is returned.
2658  */
2659 CINDEX_LINKAGE CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i);
2660 
2661 /**
2662  * \brief Determine whether two CXTypes represent the same type.
2663  *
2664  * \returns non-zero if the CXTypes represent the same type and
2665  *          zero otherwise.
2666  */
2667 CINDEX_LINKAGE unsigned clang_equalTypes(CXType A, CXType B);
2668 
2669 /**
2670  * \brief Return the canonical type for a CXType.
2671  *
2672  * Clang's type system explicitly models typedefs and all the ways
2673  * a specific type can be represented.  The canonical type is the underlying
2674  * type with all the "sugar" removed.  For example, if 'T' is a typedef
2675  * for 'int', the canonical type for 'T' would be 'int'.
2676  */
2677 CINDEX_LINKAGE CXType clang_getCanonicalType(CXType T);
2678 
2679 /**
2680  * \brief Determine whether a CXType has the "const" qualifier set,
2681  * without looking through typedefs that may have added "const" at a
2682  * different level.
2683  */
2684 CINDEX_LINKAGE unsigned clang_isConstQualifiedType(CXType T);
2685 
2686 /**
2687  * \brief Determine whether a CXType has the "volatile" qualifier set,
2688  * without looking through typedefs that may have added "volatile" at
2689  * a different level.
2690  */
2691 CINDEX_LINKAGE unsigned clang_isVolatileQualifiedType(CXType T);
2692 
2693 /**
2694  * \brief Determine whether a CXType has the "restrict" qualifier set,
2695  * without looking through typedefs that may have added "restrict" at a
2696  * different level.
2697  */
2698 CINDEX_LINKAGE unsigned clang_isRestrictQualifiedType(CXType T);
2699 
2700 /**
2701  * \brief For pointer types, returns the type of the pointee.
2702  */
2703 CINDEX_LINKAGE CXType clang_getPointeeType(CXType T);
2704 
2705 /**
2706  * \brief Return the cursor for the declaration of the given type.
2707  */
2708 CINDEX_LINKAGE CXCursor clang_getTypeDeclaration(CXType T);
2709 
2710 /**
2711  * Returns the Objective-C type encoding for the specified declaration.
2712  */
2713 CINDEX_LINKAGE CXString clang_getDeclObjCTypeEncoding(CXCursor C);
2714 
2715 /**
2716  * \brief Retrieve the spelling of a given CXTypeKind.
2717  */
2718 CINDEX_LINKAGE CXString clang_getTypeKindSpelling(enum CXTypeKind K);
2719 
2720 /**
2721  * \brief Retrieve the calling convention associated with a function type.
2722  *
2723  * If a non-function type is passed in, CXCallingConv_Invalid is returned.
2724  */
2725 CINDEX_LINKAGE enum CXCallingConv clang_getFunctionTypeCallingConv(CXType T);
2726 
2727 /**
2728  * \brief Retrieve the result type associated with a function type.
2729  *
2730  * If a non-function type is passed in, an invalid type is returned.
2731  */
2732 CINDEX_LINKAGE CXType clang_getResultType(CXType T);
2733 
2734 /**
2735  * \brief Retrieve the number of non-variadic arguments associated with a
2736  * function type.
2737  *
2738  * If a non-function type is passed in, -1 is returned.
2739  */
2740 CINDEX_LINKAGE int clang_getNumArgTypes(CXType T);
2741 
2742 /**
2743  * \brief Retrieve the type of an argument of a function type.
2744  *
2745  * If a non-function type is passed in or the function does not have enough
2746  * parameters, an invalid type is returned.
2747  */
2748 CINDEX_LINKAGE CXType clang_getArgType(CXType T, unsigned i);
2749 
2750 /**
2751  * \brief Return 1 if the CXType is a variadic function type, and 0 otherwise.
2752  */
2753 CINDEX_LINKAGE unsigned clang_isFunctionTypeVariadic(CXType T);
2754 
2755 /**
2756  * \brief Retrieve the result type associated with a given cursor.
2757  *
2758  * This only returns a valid type if the cursor refers to a function or method.
2759  */
2760 CINDEX_LINKAGE CXType clang_getCursorResultType(CXCursor C);
2761 
2762 /**
2763  * \brief Return 1 if the CXType is a POD (plain old data) type, and 0
2764  *  otherwise.
2765  */
2766 CINDEX_LINKAGE unsigned clang_isPODType(CXType T);
2767 
2768 /**
2769  * \brief Return the element type of an array, complex, or vector type.
2770  *
2771  * If a type is passed in that is not an array, complex, or vector type,
2772  * an invalid type is returned.
2773  */
2774 CINDEX_LINKAGE CXType clang_getElementType(CXType T);
2775 
2776 /**
2777  * \brief Return the number of elements of an array or vector type.
2778  *
2779  * If a type is passed in that is not an array or vector type,
2780  * -1 is returned.
2781  */
2782 CINDEX_LINKAGE long long clang_getNumElements(CXType T);
2783 
2784 /**
2785  * \brief Return the element type of an array type.
2786  *
2787  * If a non-array type is passed in, an invalid type is returned.
2788  */
2789 CINDEX_LINKAGE CXType clang_getArrayElementType(CXType T);
2790 
2791 /**
2792  * \brief Return the array size of a constant array.
2793  *
2794  * If a non-array type is passed in, -1 is returned.
2795  */
2796 CINDEX_LINKAGE long long clang_getArraySize(CXType T);
2797 
2798 /**
2799  * \brief Returns 1 if the base class specified by the cursor with kind
2800  *   CX_CXXBaseSpecifier is virtual.
2801  */
2802 CINDEX_LINKAGE unsigned clang_isVirtualBase(CXCursor);
2803 
2804 /**
2805  * \brief Represents the C++ access control level to a base class for a
2806  * cursor with kind CX_CXXBaseSpecifier.
2807  */
2808 enum CX_CXXAccessSpecifier {
2809   CX_CXXInvalidAccessSpecifier,
2810   CX_CXXPublic,
2811   CX_CXXProtected,
2812   CX_CXXPrivate
2813 };
2814 
2815 /**
2816  * \brief Returns the access control level for the C++ base specifier
2817  * represented by a cursor with kind CXCursor_CXXBaseSpecifier or
2818  * CXCursor_AccessSpecifier.
2819  */
2820 CINDEX_LINKAGE enum CX_CXXAccessSpecifier clang_getCXXAccessSpecifier(CXCursor);
2821 
2822 /**
2823  * \brief Determine the number of overloaded declarations referenced by a
2824  * \c CXCursor_OverloadedDeclRef cursor.
2825  *
2826  * \param cursor The cursor whose overloaded declarations are being queried.
2827  *
2828  * \returns The number of overloaded declarations referenced by \c cursor. If it
2829  * is not a \c CXCursor_OverloadedDeclRef cursor, returns 0.
2830  */
2831 CINDEX_LINKAGE unsigned clang_getNumOverloadedDecls(CXCursor cursor);
2832 
2833 /**
2834  * \brief Retrieve a cursor for one of the overloaded declarations referenced
2835  * by a \c CXCursor_OverloadedDeclRef cursor.
2836  *
2837  * \param cursor The cursor whose overloaded declarations are being queried.
2838  *
2839  * \param index The zero-based index into the set of overloaded declarations in
2840  * the cursor.
2841  *
2842  * \returns A cursor representing the declaration referenced by the given
2843  * \c cursor at the specified \c index. If the cursor does not have an
2844  * associated set of overloaded declarations, or if the index is out of bounds,
2845  * returns \c clang_getNullCursor();
2846  */
2847 CINDEX_LINKAGE CXCursor clang_getOverloadedDecl(CXCursor cursor,
2848                                                 unsigned index);
2849 
2850 /**
2851  * @}
2852  */
2853 
2854 /**
2855  * \defgroup CINDEX_ATTRIBUTES Information for attributes
2856  *
2857  * @{
2858  */
2859 
2860 
2861 /**
2862  * \brief For cursors representing an iboutletcollection attribute,
2863  *  this function returns the collection element type.
2864  *
2865  */
2866 CINDEX_LINKAGE CXType clang_getIBOutletCollectionType(CXCursor);
2867 
2868 /**
2869  * @}
2870  */
2871 
2872 /**
2873  * \defgroup CINDEX_CURSOR_TRAVERSAL Traversing the AST with cursors
2874  *
2875  * These routines provide the ability to traverse the abstract syntax tree
2876  * using cursors.
2877  *
2878  * @{
2879  */
2880 
2881 /**
2882  * \brief Describes how the traversal of the children of a particular
2883  * cursor should proceed after visiting a particular child cursor.
2884  *
2885  * A value of this enumeration type should be returned by each
2886  * \c CXCursorVisitor to indicate how clang_visitChildren() proceed.
2887  */
2888 enum CXChildVisitResult {
2889   /**
2890    * \brief Terminates the cursor traversal.
2891    */
2892   CXChildVisit_Break,
2893   /**
2894    * \brief Continues the cursor traversal with the next sibling of
2895    * the cursor just visited, without visiting its children.
2896    */
2897   CXChildVisit_Continue,
2898   /**
2899    * \brief Recursively traverse the children of this cursor, using
2900    * the same visitor and client data.
2901    */
2902   CXChildVisit_Recurse
2903 };
2904 
2905 /**
2906  * \brief Visitor invoked for each cursor found by a traversal.
2907  *
2908  * This visitor function will be invoked for each cursor found by
2909  * clang_visitCursorChildren(). Its first argument is the cursor being
2910  * visited, its second argument is the parent visitor for that cursor,
2911  * and its third argument is the client data provided to
2912  * clang_visitCursorChildren().
2913  *
2914  * The visitor should return one of the \c CXChildVisitResult values
2915  * to direct clang_visitCursorChildren().
2916  */
2917 typedef enum CXChildVisitResult (*CXCursorVisitor)(CXCursor cursor,
2918                                                    CXCursor parent,
2919                                                    CXClientData client_data);
2920 
2921 /**
2922  * \brief Visit the children of a particular cursor.
2923  *
2924  * This function visits all the direct children of the given cursor,
2925  * invoking the given \p visitor function with the cursors of each
2926  * visited child. The traversal may be recursive, if the visitor returns
2927  * \c CXChildVisit_Recurse. The traversal may also be ended prematurely, if
2928  * the visitor returns \c CXChildVisit_Break.
2929  *
2930  * \param parent the cursor whose child may be visited. All kinds of
2931  * cursors can be visited, including invalid cursors (which, by
2932  * definition, have no children).
2933  *
2934  * \param visitor the visitor function that will be invoked for each
2935  * child of \p parent.
2936  *
2937  * \param client_data pointer data supplied by the client, which will
2938  * be passed to the visitor each time it is invoked.
2939  *
2940  * \returns a non-zero value if the traversal was terminated
2941  * prematurely by the visitor returning \c CXChildVisit_Break.
2942  */
2943 CINDEX_LINKAGE unsigned clang_visitChildren(CXCursor parent,
2944                                             CXCursorVisitor visitor,
2945                                             CXClientData client_data);
2946 #ifdef __has_feature
2947 #  if __has_feature(blocks)
2948 /**
2949  * \brief Visitor invoked for each cursor found by a traversal.
2950  *
2951  * This visitor block will be invoked for each cursor found by
2952  * clang_visitChildrenWithBlock(). Its first argument is the cursor being
2953  * visited, its second argument is the parent visitor for that cursor.
2954  *
2955  * The visitor should return one of the \c CXChildVisitResult values
2956  * to direct clang_visitChildrenWithBlock().
2957  */
2958 typedef enum CXChildVisitResult
2959      (^CXCursorVisitorBlock)(CXCursor cursor, CXCursor parent);
2960 
2961 /**
2962  * Visits the children of a cursor using the specified block.  Behaves
2963  * identically to clang_visitChildren() in all other respects.
2964  */
2965 unsigned clang_visitChildrenWithBlock(CXCursor parent,
2966                                       CXCursorVisitorBlock block);
2967 #  endif
2968 #endif
2969 
2970 /**
2971  * @}
2972  */
2973 
2974 /**
2975  * \defgroup CINDEX_CURSOR_XREF Cross-referencing in the AST
2976  *
2977  * These routines provide the ability to determine references within and
2978  * across translation units, by providing the names of the entities referenced
2979  * by cursors, follow reference cursors to the declarations they reference,
2980  * and associate declarations with their definitions.
2981  *
2982  * @{
2983  */
2984 
2985 /**
2986  * \brief Retrieve a Unified Symbol Resolution (USR) for the entity referenced
2987  * by the given cursor.
2988  *
2989  * A Unified Symbol Resolution (USR) is a string that identifies a particular
2990  * entity (function, class, variable, etc.) within a program. USRs can be
2991  * compared across translation units to determine, e.g., when references in
2992  * one translation refer to an entity defined in another translation unit.
2993  */
2994 CINDEX_LINKAGE CXString clang_getCursorUSR(CXCursor);
2995 
2996 /**
2997  * \brief Construct a USR for a specified Objective-C class.
2998  */
2999 CINDEX_LINKAGE CXString clang_constructUSR_ObjCClass(const char *class_name);
3000 
3001 /**
3002  * \brief Construct a USR for a specified Objective-C category.
3003  */
3004 CINDEX_LINKAGE CXString
3005   clang_constructUSR_ObjCCategory(const char *class_name,
3006                                  const char *category_name);
3007 
3008 /**
3009  * \brief Construct a USR for a specified Objective-C protocol.
3010  */
3011 CINDEX_LINKAGE CXString
3012   clang_constructUSR_ObjCProtocol(const char *protocol_name);
3013 
3014 
3015 /**
3016  * \brief Construct a USR for a specified Objective-C instance variable and
3017  *   the USR for its containing class.
3018  */
3019 CINDEX_LINKAGE CXString clang_constructUSR_ObjCIvar(const char *name,
3020                                                     CXString classUSR);
3021 
3022 /**
3023  * \brief Construct a USR for a specified Objective-C method and
3024  *   the USR for its containing class.
3025  */
3026 CINDEX_LINKAGE CXString clang_constructUSR_ObjCMethod(const char *name,
3027                                                       unsigned isInstanceMethod,
3028                                                       CXString classUSR);
3029 
3030 /**
3031  * \brief Construct a USR for a specified Objective-C property and the USR
3032  *  for its containing class.
3033  */
3034 CINDEX_LINKAGE CXString clang_constructUSR_ObjCProperty(const char *property,
3035                                                         CXString classUSR);
3036 
3037 /**
3038  * \brief Retrieve a name for the entity referenced by this cursor.
3039  */
3040 CINDEX_LINKAGE CXString clang_getCursorSpelling(CXCursor);
3041 
3042 /**
3043  * \brief Retrieve a range for a piece that forms the cursors spelling name.
3044  * Most of the times there is only one range for the complete spelling but for
3045  * objc methods and objc message expressions, there are multiple pieces for each
3046  * selector identifier.
3047  *
3048  * \param pieceIndex the index of the spelling name piece. If this is greater
3049  * than the actual number of pieces, it will return a NULL (invalid) range.
3050  *
3051  * \param options Reserved.
3052  */
3053 CINDEX_LINKAGE CXSourceRange clang_Cursor_getSpellingNameRange(CXCursor,
3054                                                           unsigned pieceIndex,
3055                                                           unsigned options);
3056 
3057 /**
3058  * \brief Retrieve the display name for the entity referenced by this cursor.
3059  *
3060  * The display name contains extra information that helps identify the cursor,
3061  * such as the parameters of a function or template or the arguments of a
3062  * class template specialization.
3063  */
3064 CINDEX_LINKAGE CXString clang_getCursorDisplayName(CXCursor);
3065 
3066 /** \brief For a cursor that is a reference, retrieve a cursor representing the
3067  * entity that it references.
3068  *
3069  * Reference cursors refer to other entities in the AST. For example, an
3070  * Objective-C superclass reference cursor refers to an Objective-C class.
3071  * This function produces the cursor for the Objective-C class from the
3072  * cursor for the superclass reference. If the input cursor is a declaration or
3073  * definition, it returns that declaration or definition unchanged.
3074  * Otherwise, returns the NULL cursor.
3075  */
3076 CINDEX_LINKAGE CXCursor clang_getCursorReferenced(CXCursor);
3077 
3078 /**
3079  *  \brief For a cursor that is either a reference to or a declaration
3080  *  of some entity, retrieve a cursor that describes the definition of
3081  *  that entity.
3082  *
3083  *  Some entities can be declared multiple times within a translation
3084  *  unit, but only one of those declarations can also be a
3085  *  definition. For example, given:
3086  *
3087  *  \code
3088  *  int f(int, int);
3089  *  int g(int x, int y) { return f(x, y); }
3090  *  int f(int a, int b) { return a + b; }
3091  *  int f(int, int);
3092  *  \endcode
3093  *
3094  *  there are three declarations of the function "f", but only the
3095  *  second one is a definition. The clang_getCursorDefinition()
3096  *  function will take any cursor pointing to a declaration of "f"
3097  *  (the first or fourth lines of the example) or a cursor referenced
3098  *  that uses "f" (the call to "f' inside "g") and will return a
3099  *  declaration cursor pointing to the definition (the second "f"
3100  *  declaration).
3101  *
3102  *  If given a cursor for which there is no corresponding definition,
3103  *  e.g., because there is no definition of that entity within this
3104  *  translation unit, returns a NULL cursor.
3105  */
3106 CINDEX_LINKAGE CXCursor clang_getCursorDefinition(CXCursor);
3107 
3108 /**
3109  * \brief Determine whether the declaration pointed to by this cursor
3110  * is also a definition of that entity.
3111  */
3112 CINDEX_LINKAGE unsigned clang_isCursorDefinition(CXCursor);
3113 
3114 /**
3115  * \brief Retrieve the canonical cursor corresponding to the given cursor.
3116  *
3117  * In the C family of languages, many kinds of entities can be declared several
3118  * times within a single translation unit. For example, a structure type can
3119  * be forward-declared (possibly multiple times) and later defined:
3120  *
3121  * \code
3122  * struct X;
3123  * struct X;
3124  * struct X {
3125  *   int member;
3126  * };
3127  * \endcode
3128  *
3129  * The declarations and the definition of \c X are represented by three
3130  * different cursors, all of which are declarations of the same underlying
3131  * entity. One of these cursor is considered the "canonical" cursor, which
3132  * is effectively the representative for the underlying entity. One can
3133  * determine if two cursors are declarations of the same underlying entity by
3134  * comparing their canonical cursors.
3135  *
3136  * \returns The canonical cursor for the entity referred to by the given cursor.
3137  */
3138 CINDEX_LINKAGE CXCursor clang_getCanonicalCursor(CXCursor);
3139 
3140 
3141 /**
3142  * \brief If the cursor points to a selector identifier in a objc method or
3143  * message expression, this returns the selector index.
3144  *
3145  * After getting a cursor with #clang_getCursor, this can be called to
3146  * determine if the location points to a selector identifier.
3147  *
3148  * \returns The selector index if the cursor is an objc method or message
3149  * expression and the cursor is pointing to a selector identifier, or -1
3150  * otherwise.
3151  */
3152 CINDEX_LINKAGE int clang_Cursor_getObjCSelectorIndex(CXCursor);
3153 
3154 /**
3155  * \brief Given a cursor pointing to a C++ method call or an ObjC message,
3156  * returns non-zero if the method/message is "dynamic", meaning:
3157  *
3158  * For a C++ method: the call is virtual.
3159  * For an ObjC message: the receiver is an object instance, not 'super' or a
3160  * specific class.
3161  *
3162  * If the method/message is "static" or the cursor does not point to a
3163  * method/message, it will return zero.
3164  */
3165 CINDEX_LINKAGE int clang_Cursor_isDynamicCall(CXCursor C);
3166 
3167 /**
3168  * \brief Given a cursor that represents a declaration, return the associated
3169  * comment's source range.  The range may include multiple consecutive comments
3170  * with whitespace in between.
3171  */
3172 CINDEX_LINKAGE CXSourceRange clang_Cursor_getCommentRange(CXCursor C);
3173 
3174 /**
3175  * \brief Given a cursor that represents a declaration, return the associated
3176  * comment text, including comment markers.
3177  */
3178 CINDEX_LINKAGE CXString clang_Cursor_getRawCommentText(CXCursor C);
3179 
3180 /**
3181  * \brief Given a cursor that represents a documentable entity (e.g.,
3182  * declaration), return the associated \\brief paragraph; otherwise return the
3183  * first paragraph.
3184  */
3185 CINDEX_LINKAGE CXString clang_Cursor_getBriefCommentText(CXCursor C);
3186 
3187 /**
3188  * \brief Given a cursor that represents a documentable entity (e.g.,
3189  * declaration), return the associated parsed comment as a
3190  * \c CXComment_FullComment AST node.
3191  */
3192 CINDEX_LINKAGE CXComment clang_Cursor_getParsedComment(CXCursor C);
3193 
3194 /**
3195  * @}
3196  */
3197 
3198 /**
3199  * \defgroup CINDEX_COMMENT Comment AST introspection
3200  *
3201  * The routines in this group provide access to information in the
3202  * documentation comment ASTs.
3203  *
3204  * @{
3205  */
3206 
3207 /**
3208  * \brief Describes the type of the comment AST node (\c CXComment).  A comment
3209  * node can be considered block content (e. g., paragraph), inline content
3210  * (plain text) or neither (the root AST node).
3211  */
3212 enum CXCommentKind {
3213   /**
3214    * \brief Null comment.  No AST node is constructed at the requested location
3215    * because there is no text or a syntax error.
3216    */
3217   CXComment_Null = 0,
3218 
3219   /**
3220    * \brief Plain text.  Inline content.
3221    */
3222   CXComment_Text = 1,
3223 
3224   /**
3225    * \brief A command with word-like arguments that is considered inline content.
3226    *
3227    * For example: \\c command.
3228    */
3229   CXComment_InlineCommand = 2,
3230 
3231   /**
3232    * \brief HTML start tag with attributes (name-value pairs).  Considered
3233    * inline content.
3234    *
3235    * For example:
3236    * \verbatim
3237    * <br> <br /> <a href="http://example.org/">
3238    * \endverbatim
3239    */
3240   CXComment_HTMLStartTag = 3,
3241 
3242   /**
3243    * \brief HTML end tag.  Considered inline content.
3244    *
3245    * For example:
3246    * \verbatim
3247    * </a>
3248    * \endverbatim
3249    */
3250   CXComment_HTMLEndTag = 4,
3251 
3252   /**
3253    * \brief A paragraph, contains inline comment.  The paragraph itself is
3254    * block content.
3255    */
3256   CXComment_Paragraph = 5,
3257 
3258   /**
3259    * \brief A command that has zero or more word-like arguments (number of
3260    * word-like arguments depends on command name) and a paragraph as an
3261    * argument.  Block command is block content.
3262    *
3263    * Paragraph argument is also a child of the block command.
3264    *
3265    * For example: \\brief has 0 word-like arguments and a paragraph argument.
3266    *
3267    * AST nodes of special kinds that parser knows about (e. g., \\param
3268    * command) have their own node kinds.
3269    */
3270   CXComment_BlockCommand = 6,
3271 
3272   /**
3273    * \brief A \\param or \\arg command that describes the function parameter
3274    * (name, passing direction, description).
3275    *
3276    * For example: \\param [in] ParamName description.
3277    */
3278   CXComment_ParamCommand = 7,
3279 
3280   /**
3281    * \brief A \\tparam command that describes a template parameter (name and
3282    * description).
3283    *
3284    * For example: \\tparam T description.
3285    */
3286   CXComment_TParamCommand = 8,
3287 
3288   /**
3289    * \brief A verbatim block command (e. g., preformatted code).  Verbatim
3290    * block has an opening and a closing command and contains multiple lines of
3291    * text (\c CXComment_VerbatimBlockLine child nodes).
3292    *
3293    * For example:
3294    * \\verbatim
3295    * aaa
3296    * \\endverbatim
3297    */
3298   CXComment_VerbatimBlockCommand = 9,
3299 
3300   /**
3301    * \brief A line of text that is contained within a
3302    * CXComment_VerbatimBlockCommand node.
3303    */
3304   CXComment_VerbatimBlockLine = 10,
3305 
3306   /**
3307    * \brief A verbatim line command.  Verbatim line has an opening command,
3308    * a single line of text (up to the newline after the opening command) and
3309    * has no closing command.
3310    */
3311   CXComment_VerbatimLine = 11,
3312 
3313   /**
3314    * \brief A full comment attached to a declaration, contains block content.
3315    */
3316   CXComment_FullComment = 12
3317 };
3318 
3319 /**
3320  * \brief The most appropriate rendering mode for an inline command, chosen on
3321  * command semantics in Doxygen.
3322  */
3323 enum CXCommentInlineCommandRenderKind {
3324   /**
3325    * \brief Command argument should be rendered in a normal font.
3326    */
3327   CXCommentInlineCommandRenderKind_Normal,
3328 
3329   /**
3330    * \brief Command argument should be rendered in a bold font.
3331    */
3332   CXCommentInlineCommandRenderKind_Bold,
3333 
3334   /**
3335    * \brief Command argument should be rendered in a monospaced font.
3336    */
3337   CXCommentInlineCommandRenderKind_Monospaced,
3338 
3339   /**
3340    * \brief Command argument should be rendered emphasized (typically italic
3341    * font).
3342    */
3343   CXCommentInlineCommandRenderKind_Emphasized
3344 };
3345 
3346 /**
3347  * \brief Describes parameter passing direction for \\param or \\arg command.
3348  */
3349 enum CXCommentParamPassDirection {
3350   /**
3351    * \brief The parameter is an input parameter.
3352    */
3353   CXCommentParamPassDirection_In,
3354 
3355   /**
3356    * \brief The parameter is an output parameter.
3357    */
3358   CXCommentParamPassDirection_Out,
3359 
3360   /**
3361    * \brief The parameter is an input and output parameter.
3362    */
3363   CXCommentParamPassDirection_InOut
3364 };
3365 
3366 /**
3367  * \param Comment AST node of any kind.
3368  *
3369  * \returns the type of the AST node.
3370  */
3371 CINDEX_LINKAGE enum CXCommentKind clang_Comment_getKind(CXComment Comment);
3372 
3373 /**
3374  * \param Comment AST node of any kind.
3375  *
3376  * \returns number of children of the AST node.
3377  */
3378 CINDEX_LINKAGE unsigned clang_Comment_getNumChildren(CXComment Comment);
3379 
3380 /**
3381  * \param Comment AST node of any kind.
3382  *
3383  * \param ChildIdx child index (zero-based).
3384  *
3385  * \returns the specified child of the AST node.
3386  */
3387 CINDEX_LINKAGE
3388 CXComment clang_Comment_getChild(CXComment Comment, unsigned ChildIdx);
3389 
3390 /**
3391  * \brief A \c CXComment_Paragraph node is considered whitespace if it contains
3392  * only \c CXComment_Text nodes that are empty or whitespace.
3393  *
3394  * Other AST nodes (except \c CXComment_Paragraph and \c CXComment_Text) are
3395  * never considered whitespace.
3396  *
3397  * \returns non-zero if \c Comment is whitespace.
3398  */
3399 CINDEX_LINKAGE unsigned clang_Comment_isWhitespace(CXComment Comment);
3400 
3401 /**
3402  * \returns non-zero if \c Comment is inline content and has a newline
3403  * immediately following it in the comment text.  Newlines between paragraphs
3404  * do not count.
3405  */
3406 CINDEX_LINKAGE
3407 unsigned clang_InlineContentComment_hasTrailingNewline(CXComment Comment);
3408 
3409 /**
3410  * \param Comment a \c CXComment_Text AST node.
3411  *
3412  * \returns text contained in the AST node.
3413  */
3414 CINDEX_LINKAGE CXString clang_TextComment_getText(CXComment Comment);
3415 
3416 /**
3417  * \param Comment a \c CXComment_InlineCommand AST node.
3418  *
3419  * \returns name of the inline command.
3420  */
3421 CINDEX_LINKAGE
3422 CXString clang_InlineCommandComment_getCommandName(CXComment Comment);
3423 
3424 /**
3425  * \param Comment a \c CXComment_InlineCommand AST node.
3426  *
3427  * \returns the most appropriate rendering mode, chosen on command
3428  * semantics in Doxygen.
3429  */
3430 CINDEX_LINKAGE enum CXCommentInlineCommandRenderKind
3431 clang_InlineCommandComment_getRenderKind(CXComment Comment);
3432 
3433 /**
3434  * \param Comment a \c CXComment_InlineCommand AST node.
3435  *
3436  * \returns number of command arguments.
3437  */
3438 CINDEX_LINKAGE
3439 unsigned clang_InlineCommandComment_getNumArgs(CXComment Comment);
3440 
3441 /**
3442  * \param Comment a \c CXComment_InlineCommand AST node.
3443  *
3444  * \param ArgIdx argument index (zero-based).
3445  *
3446  * \returns text of the specified argument.
3447  */
3448 CINDEX_LINKAGE
3449 CXString clang_InlineCommandComment_getArgText(CXComment Comment,
3450                                                unsigned ArgIdx);
3451 
3452 /**
3453  * \param Comment a \c CXComment_HTMLStartTag or \c CXComment_HTMLEndTag AST
3454  * node.
3455  *
3456  * \returns HTML tag name.
3457  */
3458 CINDEX_LINKAGE CXString clang_HTMLTagComment_getTagName(CXComment Comment);
3459 
3460 /**
3461  * \param Comment a \c CXComment_HTMLStartTag AST node.
3462  *
3463  * \returns non-zero if tag is self-closing (for example, &lt;br /&gt;).
3464  */
3465 CINDEX_LINKAGE
3466 unsigned clang_HTMLStartTagComment_isSelfClosing(CXComment Comment);
3467 
3468 /**
3469  * \param Comment a \c CXComment_HTMLStartTag AST node.
3470  *
3471  * \returns number of attributes (name-value pairs) attached to the start tag.
3472  */
3473 CINDEX_LINKAGE unsigned clang_HTMLStartTag_getNumAttrs(CXComment Comment);
3474 
3475 /**
3476  * \param Comment a \c CXComment_HTMLStartTag AST node.
3477  *
3478  * \param AttrIdx attribute index (zero-based).
3479  *
3480  * \returns name of the specified attribute.
3481  */
3482 CINDEX_LINKAGE
3483 CXString clang_HTMLStartTag_getAttrName(CXComment Comment, unsigned AttrIdx);
3484 
3485 /**
3486  * \param Comment a \c CXComment_HTMLStartTag AST node.
3487  *
3488  * \param AttrIdx attribute index (zero-based).
3489  *
3490  * \returns value of the specified attribute.
3491  */
3492 CINDEX_LINKAGE
3493 CXString clang_HTMLStartTag_getAttrValue(CXComment Comment, unsigned AttrIdx);
3494 
3495 /**
3496  * \param Comment a \c CXComment_BlockCommand AST node.
3497  *
3498  * \returns name of the block command.
3499  */
3500 CINDEX_LINKAGE
3501 CXString clang_BlockCommandComment_getCommandName(CXComment Comment);
3502 
3503 /**
3504  * \param Comment a \c CXComment_BlockCommand AST node.
3505  *
3506  * \returns number of word-like arguments.
3507  */
3508 CINDEX_LINKAGE
3509 unsigned clang_BlockCommandComment_getNumArgs(CXComment Comment);
3510 
3511 /**
3512  * \param Comment a \c CXComment_BlockCommand AST node.
3513  *
3514  * \param ArgIdx argument index (zero-based).
3515  *
3516  * \returns text of the specified word-like argument.
3517  */
3518 CINDEX_LINKAGE
3519 CXString clang_BlockCommandComment_getArgText(CXComment Comment,
3520                                               unsigned ArgIdx);
3521 
3522 /**
3523  * \param Comment a \c CXComment_BlockCommand or
3524  * \c CXComment_VerbatimBlockCommand AST node.
3525  *
3526  * \returns paragraph argument of the block command.
3527  */
3528 CINDEX_LINKAGE
3529 CXComment clang_BlockCommandComment_getParagraph(CXComment Comment);
3530 
3531 /**
3532  * \param Comment a \c CXComment_ParamCommand AST node.
3533  *
3534  * \returns parameter name.
3535  */
3536 CINDEX_LINKAGE
3537 CXString clang_ParamCommandComment_getParamName(CXComment Comment);
3538 
3539 /**
3540  * \param Comment a \c CXComment_ParamCommand AST node.
3541  *
3542  * \returns non-zero if the parameter that this AST node represents was found
3543  * in the function prototype and \c clang_ParamCommandComment_getParamIndex
3544  * function will return a meaningful value.
3545  */
3546 CINDEX_LINKAGE
3547 unsigned clang_ParamCommandComment_isParamIndexValid(CXComment Comment);
3548 
3549 /**
3550  * \param Comment a \c CXComment_ParamCommand AST node.
3551  *
3552  * \returns zero-based parameter index in function prototype.
3553  */
3554 CINDEX_LINKAGE
3555 unsigned clang_ParamCommandComment_getParamIndex(CXComment Comment);
3556 
3557 /**
3558  * \param Comment a \c CXComment_ParamCommand AST node.
3559  *
3560  * \returns non-zero if parameter passing direction was specified explicitly in
3561  * the comment.
3562  */
3563 CINDEX_LINKAGE
3564 unsigned clang_ParamCommandComment_isDirectionExplicit(CXComment Comment);
3565 
3566 /**
3567  * \param Comment a \c CXComment_ParamCommand AST node.
3568  *
3569  * \returns parameter passing direction.
3570  */
3571 CINDEX_LINKAGE
3572 enum CXCommentParamPassDirection clang_ParamCommandComment_getDirection(
3573                                                             CXComment Comment);
3574 
3575 /**
3576  * \param Comment a \c CXComment_TParamCommand AST node.
3577  *
3578  * \returns template parameter name.
3579  */
3580 CINDEX_LINKAGE
3581 CXString clang_TParamCommandComment_getParamName(CXComment Comment);
3582 
3583 /**
3584  * \param Comment a \c CXComment_TParamCommand AST node.
3585  *
3586  * \returns non-zero if the parameter that this AST node represents was found
3587  * in the template parameter list and
3588  * \c clang_TParamCommandComment_getDepth and
3589  * \c clang_TParamCommandComment_getIndex functions will return a meaningful
3590  * value.
3591  */
3592 CINDEX_LINKAGE
3593 unsigned clang_TParamCommandComment_isParamPositionValid(CXComment Comment);
3594 
3595 /**
3596  * \param Comment a \c CXComment_TParamCommand AST node.
3597  *
3598  * \returns zero-based nesting depth of this parameter in the template parameter list.
3599  *
3600  * For example,
3601  * \verbatim
3602  *     template<typename C, template<typename T> class TT>
3603  *     void test(TT<int> aaa);
3604  * \endverbatim
3605  * for C and TT nesting depth is 0,
3606  * for T nesting depth is 1.
3607  */
3608 CINDEX_LINKAGE
3609 unsigned clang_TParamCommandComment_getDepth(CXComment Comment);
3610 
3611 /**
3612  * \param Comment a \c CXComment_TParamCommand AST node.
3613  *
3614  * \returns zero-based parameter index in the template parameter list at a
3615  * given nesting depth.
3616  *
3617  * For example,
3618  * \verbatim
3619  *     template<typename C, template<typename T> class TT>
3620  *     void test(TT<int> aaa);
3621  * \endverbatim
3622  * for C and TT nesting depth is 0, so we can ask for index at depth 0:
3623  * at depth 0 C's index is 0, TT's index is 1.
3624  *
3625  * For T nesting depth is 1, so we can ask for index at depth 0 and 1:
3626  * at depth 0 T's index is 1 (same as TT's),
3627  * at depth 1 T's index is 0.
3628  */
3629 CINDEX_LINKAGE
3630 unsigned clang_TParamCommandComment_getIndex(CXComment Comment, unsigned Depth);
3631 
3632 /**
3633  * \param Comment a \c CXComment_VerbatimBlockLine AST node.
3634  *
3635  * \returns text contained in the AST node.
3636  */
3637 CINDEX_LINKAGE
3638 CXString clang_VerbatimBlockLineComment_getText(CXComment Comment);
3639 
3640 /**
3641  * \param Comment a \c CXComment_VerbatimLine AST node.
3642  *
3643  * \returns text contained in the AST node.
3644  */
3645 CINDEX_LINKAGE CXString clang_VerbatimLineComment_getText(CXComment Comment);
3646 
3647 /**
3648  * \brief Convert an HTML tag AST node to string.
3649  *
3650  * \param Comment a \c CXComment_HTMLStartTag or \c CXComment_HTMLEndTag AST
3651  * node.
3652  *
3653  * \returns string containing an HTML tag.
3654  */
3655 CINDEX_LINKAGE CXString clang_HTMLTagComment_getAsString(CXComment Comment);
3656 
3657 /**
3658  * \brief Convert a given full parsed comment to an HTML fragment.
3659  *
3660  * Specific details of HTML layout are subject to change.  Don't try to parse
3661  * this HTML back into an AST, use other APIs instead.
3662  *
3663  * Currently the following CSS classes are used:
3664  * \li "para-brief" for \\brief paragraph and equivalent commands;
3665  * \li "para-returns" for \\returns paragraph and equivalent commands;
3666  * \li "word-returns" for the "Returns" word in \\returns paragraph.
3667  *
3668  * Function argument documentation is rendered as a \<dl\> list with arguments
3669  * sorted in function prototype order.  CSS classes used:
3670  * \li "param-name-index-NUMBER" for parameter name (\<dt\>);
3671  * \li "param-descr-index-NUMBER" for parameter description (\<dd\>);
3672  * \li "param-name-index-invalid" and "param-descr-index-invalid" are used if
3673  * parameter index is invalid.
3674  *
3675  * Template parameter documentation is rendered as a \<dl\> list with
3676  * parameters sorted in template parameter list order.  CSS classes used:
3677  * \li "tparam-name-index-NUMBER" for parameter name (\<dt\>);
3678  * \li "tparam-descr-index-NUMBER" for parameter description (\<dd\>);
3679  * \li "tparam-name-index-other" and "tparam-descr-index-other" are used for
3680  * names inside template template parameters;
3681  * \li "tparam-name-index-invalid" and "tparam-descr-index-invalid" are used if
3682  * parameter position is invalid.
3683  *
3684  * \param Comment a \c CXComment_FullComment AST node.
3685  *
3686  * \returns string containing an HTML fragment.
3687  */
3688 CINDEX_LINKAGE CXString clang_FullComment_getAsHTML(CXComment Comment);
3689 
3690 /**
3691  * \brief Convert a given full parsed comment to an XML document.
3692  *
3693  * A Relax NG schema for the XML can be found in comment-xml-schema.rng file
3694  * inside clang source tree.
3695  *
3696  * \param Comment a \c CXComment_FullComment AST node.
3697  *
3698  * \returns string containing an XML document.
3699  */
3700 CINDEX_LINKAGE CXString clang_FullComment_getAsXML(CXComment Comment);
3701 
3702 /**
3703  * @}
3704  */
3705 
3706 /**
3707  * \defgroup CINDEX_CPP C++ AST introspection
3708  *
3709  * The routines in this group provide access information in the ASTs specific
3710  * to C++ language features.
3711  *
3712  * @{
3713  */
3714 
3715 /**
3716  * \brief Determine if a C++ member function or member function template is
3717  * declared 'static'.
3718  */
3719 CINDEX_LINKAGE unsigned clang_CXXMethod_isStatic(CXCursor C);
3720 
3721 /**
3722  * \brief Determine if a C++ member function or member function template is
3723  * explicitly declared 'virtual' or if it overrides a virtual method from
3724  * one of the base classes.
3725  */
3726 CINDEX_LINKAGE unsigned clang_CXXMethod_isVirtual(CXCursor C);
3727 
3728 /**
3729  * \brief Given a cursor that represents a template, determine
3730  * the cursor kind of the specializations would be generated by instantiating
3731  * the template.
3732  *
3733  * This routine can be used to determine what flavor of function template,
3734  * class template, or class template partial specialization is stored in the
3735  * cursor. For example, it can describe whether a class template cursor is
3736  * declared with "struct", "class" or "union".
3737  *
3738  * \param C The cursor to query. This cursor should represent a template
3739  * declaration.
3740  *
3741  * \returns The cursor kind of the specializations that would be generated
3742  * by instantiating the template \p C. If \p C is not a template, returns
3743  * \c CXCursor_NoDeclFound.
3744  */
3745 CINDEX_LINKAGE enum CXCursorKind clang_getTemplateCursorKind(CXCursor C);
3746 
3747 /**
3748  * \brief Given a cursor that may represent a specialization or instantiation
3749  * of a template, retrieve the cursor that represents the template that it
3750  * specializes or from which it was instantiated.
3751  *
3752  * This routine determines the template involved both for explicit
3753  * specializations of templates and for implicit instantiations of the template,
3754  * both of which are referred to as "specializations". For a class template
3755  * specialization (e.g., \c std::vector<bool>), this routine will return
3756  * either the primary template (\c std::vector) or, if the specialization was
3757  * instantiated from a class template partial specialization, the class template
3758  * partial specialization. For a class template partial specialization and a
3759  * function template specialization (including instantiations), this
3760  * this routine will return the specialized template.
3761  *
3762  * For members of a class template (e.g., member functions, member classes, or
3763  * static data members), returns the specialized or instantiated member.
3764  * Although not strictly "templates" in the C++ language, members of class
3765  * templates have the same notions of specializations and instantiations that
3766  * templates do, so this routine treats them similarly.
3767  *
3768  * \param C A cursor that may be a specialization of a template or a member
3769  * of a template.
3770  *
3771  * \returns If the given cursor is a specialization or instantiation of a
3772  * template or a member thereof, the template or member that it specializes or
3773  * from which it was instantiated. Otherwise, returns a NULL cursor.
3774  */
3775 CINDEX_LINKAGE CXCursor clang_getSpecializedCursorTemplate(CXCursor C);
3776 
3777 /**
3778  * \brief Given a cursor that references something else, return the source range
3779  * covering that reference.
3780  *
3781  * \param C A cursor pointing to a member reference, a declaration reference, or
3782  * an operator call.
3783  * \param NameFlags A bitset with three independent flags:
3784  * CXNameRange_WantQualifier, CXNameRange_WantTemplateArgs, and
3785  * CXNameRange_WantSinglePiece.
3786  * \param PieceIndex For contiguous names or when passing the flag
3787  * CXNameRange_WantSinglePiece, only one piece with index 0 is
3788  * available. When the CXNameRange_WantSinglePiece flag is not passed for a
3789  * non-contiguous names, this index can be used to retrieve the individual
3790  * pieces of the name. See also CXNameRange_WantSinglePiece.
3791  *
3792  * \returns The piece of the name pointed to by the given cursor. If there is no
3793  * name, or if the PieceIndex is out-of-range, a null-cursor will be returned.
3794  */
3795 CINDEX_LINKAGE CXSourceRange clang_getCursorReferenceNameRange(CXCursor C,
3796                                                 unsigned NameFlags,
3797                                                 unsigned PieceIndex);
3798 
3799 enum CXNameRefFlags {
3800   /**
3801    * \brief Include the nested-name-specifier, e.g. Foo:: in x.Foo::y, in the
3802    * range.
3803    */
3804   CXNameRange_WantQualifier = 0x1,
3805 
3806   /**
3807    * \brief Include the explicit template arguments, e.g. \<int> in x.f<int>,
3808    * in the range.
3809    */
3810   CXNameRange_WantTemplateArgs = 0x2,
3811 
3812   /**
3813    * \brief If the name is non-contiguous, return the full spanning range.
3814    *
3815    * Non-contiguous names occur in Objective-C when a selector with two or more
3816    * parameters is used, or in C++ when using an operator:
3817    * \code
3818    * [object doSomething:here withValue:there]; // ObjC
3819    * return some_vector[1]; // C++
3820    * \endcode
3821    */
3822   CXNameRange_WantSinglePiece = 0x4
3823 };
3824 
3825 /**
3826  * @}
3827  */
3828 
3829 /**
3830  * \defgroup CINDEX_LEX Token extraction and manipulation
3831  *
3832  * The routines in this group provide access to the tokens within a
3833  * translation unit, along with a semantic mapping of those tokens to
3834  * their corresponding cursors.
3835  *
3836  * @{
3837  */
3838 
3839 /**
3840  * \brief Describes a kind of token.
3841  */
3842 typedef enum CXTokenKind {
3843   /**
3844    * \brief A token that contains some kind of punctuation.
3845    */
3846   CXToken_Punctuation,
3847 
3848   /**
3849    * \brief A language keyword.
3850    */
3851   CXToken_Keyword,
3852 
3853   /**
3854    * \brief An identifier (that is not a keyword).
3855    */
3856   CXToken_Identifier,
3857 
3858   /**
3859    * \brief A numeric, string, or character literal.
3860    */
3861   CXToken_Literal,
3862 
3863   /**
3864    * \brief A comment.
3865    */
3866   CXToken_Comment
3867 } CXTokenKind;
3868 
3869 /**
3870  * \brief Describes a single preprocessing token.
3871  */
3872 typedef struct {
3873   unsigned int_data[4];
3874   void *ptr_data;
3875 } CXToken;
3876 
3877 /**
3878  * \brief Determine the kind of the given token.
3879  */
3880 CINDEX_LINKAGE CXTokenKind clang_getTokenKind(CXToken);
3881 
3882 /**
3883  * \brief Determine the spelling of the given token.
3884  *
3885  * The spelling of a token is the textual representation of that token, e.g.,
3886  * the text of an identifier or keyword.
3887  */
3888 CINDEX_LINKAGE CXString clang_getTokenSpelling(CXTranslationUnit, CXToken);
3889 
3890 /**
3891  * \brief Retrieve the source location of the given token.
3892  */
3893 CINDEX_LINKAGE CXSourceLocation clang_getTokenLocation(CXTranslationUnit,
3894                                                        CXToken);
3895 
3896 /**
3897  * \brief Retrieve a source range that covers the given token.
3898  */
3899 CINDEX_LINKAGE CXSourceRange clang_getTokenExtent(CXTranslationUnit, CXToken);
3900 
3901 /**
3902  * \brief Tokenize the source code described by the given range into raw
3903  * lexical tokens.
3904  *
3905  * \param TU the translation unit whose text is being tokenized.
3906  *
3907  * \param Range the source range in which text should be tokenized. All of the
3908  * tokens produced by tokenization will fall within this source range,
3909  *
3910  * \param Tokens this pointer will be set to point to the array of tokens
3911  * that occur within the given source range. The returned pointer must be
3912  * freed with clang_disposeTokens() before the translation unit is destroyed.
3913  *
3914  * \param NumTokens will be set to the number of tokens in the \c *Tokens
3915  * array.
3916  *
3917  */
3918 CINDEX_LINKAGE void clang_tokenize(CXTranslationUnit TU, CXSourceRange Range,
3919                                    CXToken **Tokens, unsigned *NumTokens);
3920 
3921 /**
3922  * \brief Annotate the given set of tokens by providing cursors for each token
3923  * that can be mapped to a specific entity within the abstract syntax tree.
3924  *
3925  * This token-annotation routine is equivalent to invoking
3926  * clang_getCursor() for the source locations of each of the
3927  * tokens. The cursors provided are filtered, so that only those
3928  * cursors that have a direct correspondence to the token are
3929  * accepted. For example, given a function call \c f(x),
3930  * clang_getCursor() would provide the following cursors:
3931  *
3932  *   * when the cursor is over the 'f', a DeclRefExpr cursor referring to 'f'.
3933  *   * when the cursor is over the '(' or the ')', a CallExpr referring to 'f'.
3934  *   * when the cursor is over the 'x', a DeclRefExpr cursor referring to 'x'.
3935  *
3936  * Only the first and last of these cursors will occur within the
3937  * annotate, since the tokens "f" and "x' directly refer to a function
3938  * and a variable, respectively, but the parentheses are just a small
3939  * part of the full syntax of the function call expression, which is
3940  * not provided as an annotation.
3941  *
3942  * \param TU the translation unit that owns the given tokens.
3943  *
3944  * \param Tokens the set of tokens to annotate.
3945  *
3946  * \param NumTokens the number of tokens in \p Tokens.
3947  *
3948  * \param Cursors an array of \p NumTokens cursors, whose contents will be
3949  * replaced with the cursors corresponding to each token.
3950  */
3951 CINDEX_LINKAGE void clang_annotateTokens(CXTranslationUnit TU,
3952                                          CXToken *Tokens, unsigned NumTokens,
3953                                          CXCursor *Cursors);
3954 
3955 /**
3956  * \brief Free the given set of tokens.
3957  */
3958 CINDEX_LINKAGE void clang_disposeTokens(CXTranslationUnit TU,
3959                                         CXToken *Tokens, unsigned NumTokens);
3960 
3961 /**
3962  * @}
3963  */
3964 
3965 /**
3966  * \defgroup CINDEX_DEBUG Debugging facilities
3967  *
3968  * These routines are used for testing and debugging, only, and should not
3969  * be relied upon.
3970  *
3971  * @{
3972  */
3973 
3974 /* for debug/testing */
3975 CINDEX_LINKAGE CXString clang_getCursorKindSpelling(enum CXCursorKind Kind);
3976 CINDEX_LINKAGE void clang_getDefinitionSpellingAndExtent(CXCursor,
3977                                           const char **startBuf,
3978                                           const char **endBuf,
3979                                           unsigned *startLine,
3980                                           unsigned *startColumn,
3981                                           unsigned *endLine,
3982                                           unsigned *endColumn);
3983 CINDEX_LINKAGE void clang_enableStackTraces(void);
3984 CINDEX_LINKAGE void clang_executeOnThread(void (*fn)(void*), void *user_data,
3985                                           unsigned stack_size);
3986 
3987 /**
3988  * @}
3989  */
3990 
3991 /**
3992  * \defgroup CINDEX_CODE_COMPLET Code completion
3993  *
3994  * Code completion involves taking an (incomplete) source file, along with
3995  * knowledge of where the user is actively editing that file, and suggesting
3996  * syntactically- and semantically-valid constructs that the user might want to
3997  * use at that particular point in the source code. These data structures and
3998  * routines provide support for code completion.
3999  *
4000  * @{
4001  */
4002 
4003 /**
4004  * \brief A semantic string that describes a code-completion result.
4005  *
4006  * A semantic string that describes the formatting of a code-completion
4007  * result as a single "template" of text that should be inserted into the
4008  * source buffer when a particular code-completion result is selected.
4009  * Each semantic string is made up of some number of "chunks", each of which
4010  * contains some text along with a description of what that text means, e.g.,
4011  * the name of the entity being referenced, whether the text chunk is part of
4012  * the template, or whether it is a "placeholder" that the user should replace
4013  * with actual code,of a specific kind. See \c CXCompletionChunkKind for a
4014  * description of the different kinds of chunks.
4015  */
4016 typedef void *CXCompletionString;
4017 
4018 /**
4019  * \brief A single result of code completion.
4020  */
4021 typedef struct {
4022   /**
4023    * \brief The kind of entity that this completion refers to.
4024    *
4025    * The cursor kind will be a macro, keyword, or a declaration (one of the
4026    * *Decl cursor kinds), describing the entity that the completion is
4027    * referring to.
4028    *
4029    * \todo In the future, we would like to provide a full cursor, to allow
4030    * the client to extract additional information from declaration.
4031    */
4032   enum CXCursorKind CursorKind;
4033 
4034   /**
4035    * \brief The code-completion string that describes how to insert this
4036    * code-completion result into the editing buffer.
4037    */
4038   CXCompletionString CompletionString;
4039 } CXCompletionResult;
4040 
4041 /**
4042  * \brief Describes a single piece of text within a code-completion string.
4043  *
4044  * Each "chunk" within a code-completion string (\c CXCompletionString) is
4045  * either a piece of text with a specific "kind" that describes how that text
4046  * should be interpreted by the client or is another completion string.
4047  */
4048 enum CXCompletionChunkKind {
4049   /**
4050    * \brief A code-completion string that describes "optional" text that
4051    * could be a part of the template (but is not required).
4052    *
4053    * The Optional chunk is the only kind of chunk that has a code-completion
4054    * string for its representation, which is accessible via
4055    * \c clang_getCompletionChunkCompletionString(). The code-completion string
4056    * describes an additional part of the template that is completely optional.
4057    * For example, optional chunks can be used to describe the placeholders for
4058    * arguments that match up with defaulted function parameters, e.g. given:
4059    *
4060    * \code
4061    * void f(int x, float y = 3.14, double z = 2.71828);
4062    * \endcode
4063    *
4064    * The code-completion string for this function would contain:
4065    *   - a TypedText chunk for "f".
4066    *   - a LeftParen chunk for "(".
4067    *   - a Placeholder chunk for "int x"
4068    *   - an Optional chunk containing the remaining defaulted arguments, e.g.,
4069    *       - a Comma chunk for ","
4070    *       - a Placeholder chunk for "float y"
4071    *       - an Optional chunk containing the last defaulted argument:
4072    *           - a Comma chunk for ","
4073    *           - a Placeholder chunk for "double z"
4074    *   - a RightParen chunk for ")"
4075    *
4076    * There are many ways to handle Optional chunks. Two simple approaches are:
4077    *   - Completely ignore optional chunks, in which case the template for the
4078    *     function "f" would only include the first parameter ("int x").
4079    *   - Fully expand all optional chunks, in which case the template for the
4080    *     function "f" would have all of the parameters.
4081    */
4082   CXCompletionChunk_Optional,
4083   /**
4084    * \brief Text that a user would be expected to type to get this
4085    * code-completion result.
4086    *
4087    * There will be exactly one "typed text" chunk in a semantic string, which
4088    * will typically provide the spelling of a keyword or the name of a
4089    * declaration that could be used at the current code point. Clients are
4090    * expected to filter the code-completion results based on the text in this
4091    * chunk.
4092    */
4093   CXCompletionChunk_TypedText,
4094   /**
4095    * \brief Text that should be inserted as part of a code-completion result.
4096    *
4097    * A "text" chunk represents text that is part of the template to be
4098    * inserted into user code should this particular code-completion result
4099    * be selected.
4100    */
4101   CXCompletionChunk_Text,
4102   /**
4103    * \brief Placeholder text that should be replaced by the user.
4104    *
4105    * A "placeholder" chunk marks a place where the user should insert text
4106    * into the code-completion template. For example, placeholders might mark
4107    * the function parameters for a function declaration, to indicate that the
4108    * user should provide arguments for each of those parameters. The actual
4109    * text in a placeholder is a suggestion for the text to display before
4110    * the user replaces the placeholder with real code.
4111    */
4112   CXCompletionChunk_Placeholder,
4113   /**
4114    * \brief Informative text that should be displayed but never inserted as
4115    * part of the template.
4116    *
4117    * An "informative" chunk contains annotations that can be displayed to
4118    * help the user decide whether a particular code-completion result is the
4119    * right option, but which is not part of the actual template to be inserted
4120    * by code completion.
4121    */
4122   CXCompletionChunk_Informative,
4123   /**
4124    * \brief Text that describes the current parameter when code-completion is
4125    * referring to function call, message send, or template specialization.
4126    *
4127    * A "current parameter" chunk occurs when code-completion is providing
4128    * information about a parameter corresponding to the argument at the
4129    * code-completion point. For example, given a function
4130    *
4131    * \code
4132    * int add(int x, int y);
4133    * \endcode
4134    *
4135    * and the source code \c add(, where the code-completion point is after the
4136    * "(", the code-completion string will contain a "current parameter" chunk
4137    * for "int x", indicating that the current argument will initialize that
4138    * parameter. After typing further, to \c add(17, (where the code-completion
4139    * point is after the ","), the code-completion string will contain a
4140    * "current paremeter" chunk to "int y".
4141    */
4142   CXCompletionChunk_CurrentParameter,
4143   /**
4144    * \brief A left parenthesis ('('), used to initiate a function call or
4145    * signal the beginning of a function parameter list.
4146    */
4147   CXCompletionChunk_LeftParen,
4148   /**
4149    * \brief A right parenthesis (')'), used to finish a function call or
4150    * signal the end of a function parameter list.
4151    */
4152   CXCompletionChunk_RightParen,
4153   /**
4154    * \brief A left bracket ('[').
4155    */
4156   CXCompletionChunk_LeftBracket,
4157   /**
4158    * \brief A right bracket (']').
4159    */
4160   CXCompletionChunk_RightBracket,
4161   /**
4162    * \brief A left brace ('{').
4163    */
4164   CXCompletionChunk_LeftBrace,
4165   /**
4166    * \brief A right brace ('}').
4167    */
4168   CXCompletionChunk_RightBrace,
4169   /**
4170    * \brief A left angle bracket ('<').
4171    */
4172   CXCompletionChunk_LeftAngle,
4173   /**
4174    * \brief A right angle bracket ('>').
4175    */
4176   CXCompletionChunk_RightAngle,
4177   /**
4178    * \brief A comma separator (',').
4179    */
4180   CXCompletionChunk_Comma,
4181   /**
4182    * \brief Text that specifies the result type of a given result.
4183    *
4184    * This special kind of informative chunk is not meant to be inserted into
4185    * the text buffer. Rather, it is meant to illustrate the type that an
4186    * expression using the given completion string would have.
4187    */
4188   CXCompletionChunk_ResultType,
4189   /**
4190    * \brief A colon (':').
4191    */
4192   CXCompletionChunk_Colon,
4193   /**
4194    * \brief A semicolon (';').
4195    */
4196   CXCompletionChunk_SemiColon,
4197   /**
4198    * \brief An '=' sign.
4199    */
4200   CXCompletionChunk_Equal,
4201   /**
4202    * Horizontal space (' ').
4203    */
4204   CXCompletionChunk_HorizontalSpace,
4205   /**
4206    * Vertical space ('\n'), after which it is generally a good idea to
4207    * perform indentation.
4208    */
4209   CXCompletionChunk_VerticalSpace
4210 };
4211 
4212 /**
4213  * \brief Determine the kind of a particular chunk within a completion string.
4214  *
4215  * \param completion_string the completion string to query.
4216  *
4217  * \param chunk_number the 0-based index of the chunk in the completion string.
4218  *
4219  * \returns the kind of the chunk at the index \c chunk_number.
4220  */
4221 CINDEX_LINKAGE enum CXCompletionChunkKind
4222 clang_getCompletionChunkKind(CXCompletionString completion_string,
4223                              unsigned chunk_number);
4224 
4225 /**
4226  * \brief Retrieve the text associated with a particular chunk within a
4227  * completion string.
4228  *
4229  * \param completion_string the completion string to query.
4230  *
4231  * \param chunk_number the 0-based index of the chunk in the completion string.
4232  *
4233  * \returns the text associated with the chunk at index \c chunk_number.
4234  */
4235 CINDEX_LINKAGE CXString
4236 clang_getCompletionChunkText(CXCompletionString completion_string,
4237                              unsigned chunk_number);
4238 
4239 /**
4240  * \brief Retrieve the completion string associated with a particular chunk
4241  * within a completion string.
4242  *
4243  * \param completion_string the completion string to query.
4244  *
4245  * \param chunk_number the 0-based index of the chunk in the completion string.
4246  *
4247  * \returns the completion string associated with the chunk at index
4248  * \c chunk_number.
4249  */
4250 CINDEX_LINKAGE CXCompletionString
4251 clang_getCompletionChunkCompletionString(CXCompletionString completion_string,
4252                                          unsigned chunk_number);
4253 
4254 /**
4255  * \brief Retrieve the number of chunks in the given code-completion string.
4256  */
4257 CINDEX_LINKAGE unsigned
4258 clang_getNumCompletionChunks(CXCompletionString completion_string);
4259 
4260 /**
4261  * \brief Determine the priority of this code completion.
4262  *
4263  * The priority of a code completion indicates how likely it is that this
4264  * particular completion is the completion that the user will select. The
4265  * priority is selected by various internal heuristics.
4266  *
4267  * \param completion_string The completion string to query.
4268  *
4269  * \returns The priority of this completion string. Smaller values indicate
4270  * higher-priority (more likely) completions.
4271  */
4272 CINDEX_LINKAGE unsigned
4273 clang_getCompletionPriority(CXCompletionString completion_string);
4274 
4275 /**
4276  * \brief Determine the availability of the entity that this code-completion
4277  * string refers to.
4278  *
4279  * \param completion_string The completion string to query.
4280  *
4281  * \returns The availability of the completion string.
4282  */
4283 CINDEX_LINKAGE enum CXAvailabilityKind
4284 clang_getCompletionAvailability(CXCompletionString completion_string);
4285 
4286 /**
4287  * \brief Retrieve the number of annotations associated with the given
4288  * completion string.
4289  *
4290  * \param completion_string the completion string to query.
4291  *
4292  * \returns the number of annotations associated with the given completion
4293  * string.
4294  */
4295 CINDEX_LINKAGE unsigned
4296 clang_getCompletionNumAnnotations(CXCompletionString completion_string);
4297 
4298 /**
4299  * \brief Retrieve the annotation associated with the given completion string.
4300  *
4301  * \param completion_string the completion string to query.
4302  *
4303  * \param annotation_number the 0-based index of the annotation of the
4304  * completion string.
4305  *
4306  * \returns annotation string associated with the completion at index
4307  * \c annotation_number, or a NULL string if that annotation is not available.
4308  */
4309 CINDEX_LINKAGE CXString
4310 clang_getCompletionAnnotation(CXCompletionString completion_string,
4311                               unsigned annotation_number);
4312 
4313 /**
4314  * \brief Retrieve the parent context of the given completion string.
4315  *
4316  * The parent context of a completion string is the semantic parent of
4317  * the declaration (if any) that the code completion represents. For example,
4318  * a code completion for an Objective-C method would have the method's class
4319  * or protocol as its context.
4320  *
4321  * \param completion_string The code completion string whose parent is
4322  * being queried.
4323  *
4324  * \param kind If non-NULL, will be set to the kind of the parent context,
4325  * or CXCursor_NotImplemented if there is no context.
4326  *
4327  * \returns The name of the completion parent, e.g., "NSObject" if
4328  * the completion string represents a method in the NSObject class.
4329  */
4330 CINDEX_LINKAGE CXString
4331 clang_getCompletionParent(CXCompletionString completion_string,
4332                           enum CXCursorKind *kind);
4333 
4334 /**
4335  * \brief Retrieve the brief documentation comment attached to the declaration
4336  * that corresponds to the given completion string.
4337  */
4338 CINDEX_LINKAGE CXString
4339 clang_getCompletionBriefComment(CXCompletionString completion_string);
4340 
4341 /**
4342  * \brief Retrieve a completion string for an arbitrary declaration or macro
4343  * definition cursor.
4344  *
4345  * \param cursor The cursor to query.
4346  *
4347  * \returns A non-context-sensitive completion string for declaration and macro
4348  * definition cursors, or NULL for other kinds of cursors.
4349  */
4350 CINDEX_LINKAGE CXCompletionString
4351 clang_getCursorCompletionString(CXCursor cursor);
4352 
4353 /**
4354  * \brief Contains the results of code-completion.
4355  *
4356  * This data structure contains the results of code completion, as
4357  * produced by \c clang_codeCompleteAt(). Its contents must be freed by
4358  * \c clang_disposeCodeCompleteResults.
4359  */
4360 typedef struct {
4361   /**
4362    * \brief The code-completion results.
4363    */
4364   CXCompletionResult *Results;
4365 
4366   /**
4367    * \brief The number of code-completion results stored in the
4368    * \c Results array.
4369    */
4370   unsigned NumResults;
4371 } CXCodeCompleteResults;
4372 
4373 /**
4374  * \brief Flags that can be passed to \c clang_codeCompleteAt() to
4375  * modify its behavior.
4376  *
4377  * The enumerators in this enumeration can be bitwise-OR'd together to
4378  * provide multiple options to \c clang_codeCompleteAt().
4379  */
4380 enum CXCodeComplete_Flags {
4381   /**
4382    * \brief Whether to include macros within the set of code
4383    * completions returned.
4384    */
4385   CXCodeComplete_IncludeMacros = 0x01,
4386 
4387   /**
4388    * \brief Whether to include code patterns for language constructs
4389    * within the set of code completions, e.g., for loops.
4390    */
4391   CXCodeComplete_IncludeCodePatterns = 0x02,
4392 
4393   /**
4394    * \brief Whether to include brief documentation within the set of code
4395    * completions returned.
4396    */
4397   CXCodeComplete_IncludeBriefComments = 0x04
4398 };
4399 
4400 /**
4401  * \brief Bits that represent the context under which completion is occurring.
4402  *
4403  * The enumerators in this enumeration may be bitwise-OR'd together if multiple
4404  * contexts are occurring simultaneously.
4405  */
4406 enum CXCompletionContext {
4407   /**
4408    * \brief The context for completions is unexposed, as only Clang results
4409    * should be included. (This is equivalent to having no context bits set.)
4410    */
4411   CXCompletionContext_Unexposed = 0,
4412 
4413   /**
4414    * \brief Completions for any possible type should be included in the results.
4415    */
4416   CXCompletionContext_AnyType = 1 << 0,
4417 
4418   /**
4419    * \brief Completions for any possible value (variables, function calls, etc.)
4420    * should be included in the results.
4421    */
4422   CXCompletionContext_AnyValue = 1 << 1,
4423   /**
4424    * \brief Completions for values that resolve to an Objective-C object should
4425    * be included in the results.
4426    */
4427   CXCompletionContext_ObjCObjectValue = 1 << 2,
4428   /**
4429    * \brief Completions for values that resolve to an Objective-C selector
4430    * should be included in the results.
4431    */
4432   CXCompletionContext_ObjCSelectorValue = 1 << 3,
4433   /**
4434    * \brief Completions for values that resolve to a C++ class type should be
4435    * included in the results.
4436    */
4437   CXCompletionContext_CXXClassTypeValue = 1 << 4,
4438 
4439   /**
4440    * \brief Completions for fields of the member being accessed using the dot
4441    * operator should be included in the results.
4442    */
4443   CXCompletionContext_DotMemberAccess = 1 << 5,
4444   /**
4445    * \brief Completions for fields of the member being accessed using the arrow
4446    * operator should be included in the results.
4447    */
4448   CXCompletionContext_ArrowMemberAccess = 1 << 6,
4449   /**
4450    * \brief Completions for properties of the Objective-C object being accessed
4451    * using the dot operator should be included in the results.
4452    */
4453   CXCompletionContext_ObjCPropertyAccess = 1 << 7,
4454 
4455   /**
4456    * \brief Completions for enum tags should be included in the results.
4457    */
4458   CXCompletionContext_EnumTag = 1 << 8,
4459   /**
4460    * \brief Completions for union tags should be included in the results.
4461    */
4462   CXCompletionContext_UnionTag = 1 << 9,
4463   /**
4464    * \brief Completions for struct tags should be included in the results.
4465    */
4466   CXCompletionContext_StructTag = 1 << 10,
4467 
4468   /**
4469    * \brief Completions for C++ class names should be included in the results.
4470    */
4471   CXCompletionContext_ClassTag = 1 << 11,
4472   /**
4473    * \brief Completions for C++ namespaces and namespace aliases should be
4474    * included in the results.
4475    */
4476   CXCompletionContext_Namespace = 1 << 12,
4477   /**
4478    * \brief Completions for C++ nested name specifiers should be included in
4479    * the results.
4480    */
4481   CXCompletionContext_NestedNameSpecifier = 1 << 13,
4482 
4483   /**
4484    * \brief Completions for Objective-C interfaces (classes) should be included
4485    * in the results.
4486    */
4487   CXCompletionContext_ObjCInterface = 1 << 14,
4488   /**
4489    * \brief Completions for Objective-C protocols should be included in
4490    * the results.
4491    */
4492   CXCompletionContext_ObjCProtocol = 1 << 15,
4493   /**
4494    * \brief Completions for Objective-C categories should be included in
4495    * the results.
4496    */
4497   CXCompletionContext_ObjCCategory = 1 << 16,
4498   /**
4499    * \brief Completions for Objective-C instance messages should be included
4500    * in the results.
4501    */
4502   CXCompletionContext_ObjCInstanceMessage = 1 << 17,
4503   /**
4504    * \brief Completions for Objective-C class messages should be included in
4505    * the results.
4506    */
4507   CXCompletionContext_ObjCClassMessage = 1 << 18,
4508   /**
4509    * \brief Completions for Objective-C selector names should be included in
4510    * the results.
4511    */
4512   CXCompletionContext_ObjCSelectorName = 1 << 19,
4513 
4514   /**
4515    * \brief Completions for preprocessor macro names should be included in
4516    * the results.
4517    */
4518   CXCompletionContext_MacroName = 1 << 20,
4519 
4520   /**
4521    * \brief Natural language completions should be included in the results.
4522    */
4523   CXCompletionContext_NaturalLanguage = 1 << 21,
4524 
4525   /**
4526    * \brief The current context is unknown, so set all contexts.
4527    */
4528   CXCompletionContext_Unknown = ((1 << 22) - 1)
4529 };
4530 
4531 /**
4532  * \brief Returns a default set of code-completion options that can be
4533  * passed to\c clang_codeCompleteAt().
4534  */
4535 CINDEX_LINKAGE unsigned clang_defaultCodeCompleteOptions(void);
4536 
4537 /**
4538  * \brief Perform code completion at a given location in a translation unit.
4539  *
4540  * This function performs code completion at a particular file, line, and
4541  * column within source code, providing results that suggest potential
4542  * code snippets based on the context of the completion. The basic model
4543  * for code completion is that Clang will parse a complete source file,
4544  * performing syntax checking up to the location where code-completion has
4545  * been requested. At that point, a special code-completion token is passed
4546  * to the parser, which recognizes this token and determines, based on the
4547  * current location in the C/Objective-C/C++ grammar and the state of
4548  * semantic analysis, what completions to provide. These completions are
4549  * returned via a new \c CXCodeCompleteResults structure.
4550  *
4551  * Code completion itself is meant to be triggered by the client when the
4552  * user types punctuation characters or whitespace, at which point the
4553  * code-completion location will coincide with the cursor. For example, if \c p
4554  * is a pointer, code-completion might be triggered after the "-" and then
4555  * after the ">" in \c p->. When the code-completion location is afer the ">",
4556  * the completion results will provide, e.g., the members of the struct that
4557  * "p" points to. The client is responsible for placing the cursor at the
4558  * beginning of the token currently being typed, then filtering the results
4559  * based on the contents of the token. For example, when code-completing for
4560  * the expression \c p->get, the client should provide the location just after
4561  * the ">" (e.g., pointing at the "g") to this code-completion hook. Then, the
4562  * client can filter the results based on the current token text ("get"), only
4563  * showing those results that start with "get". The intent of this interface
4564  * is to separate the relatively high-latency acquisition of code-completion
4565  * results from the filtering of results on a per-character basis, which must
4566  * have a lower latency.
4567  *
4568  * \param TU The translation unit in which code-completion should
4569  * occur. The source files for this translation unit need not be
4570  * completely up-to-date (and the contents of those source files may
4571  * be overridden via \p unsaved_files). Cursors referring into the
4572  * translation unit may be invalidated by this invocation.
4573  *
4574  * \param complete_filename The name of the source file where code
4575  * completion should be performed. This filename may be any file
4576  * included in the translation unit.
4577  *
4578  * \param complete_line The line at which code-completion should occur.
4579  *
4580  * \param complete_column The column at which code-completion should occur.
4581  * Note that the column should point just after the syntactic construct that
4582  * initiated code completion, and not in the middle of a lexical token.
4583  *
4584  * \param unsaved_files the Tiles that have not yet been saved to disk
4585  * but may be required for parsing or code completion, including the
4586  * contents of those files.  The contents and name of these files (as
4587  * specified by CXUnsavedFile) are copied when necessary, so the
4588  * client only needs to guarantee their validity until the call to
4589  * this function returns.
4590  *
4591  * \param num_unsaved_files The number of unsaved file entries in \p
4592  * unsaved_files.
4593  *
4594  * \param options Extra options that control the behavior of code
4595  * completion, expressed as a bitwise OR of the enumerators of the
4596  * CXCodeComplete_Flags enumeration. The
4597  * \c clang_defaultCodeCompleteOptions() function returns a default set
4598  * of code-completion options.
4599  *
4600  * \returns If successful, a new \c CXCodeCompleteResults structure
4601  * containing code-completion results, which should eventually be
4602  * freed with \c clang_disposeCodeCompleteResults(). If code
4603  * completion fails, returns NULL.
4604  */
4605 CINDEX_LINKAGE
4606 CXCodeCompleteResults *clang_codeCompleteAt(CXTranslationUnit TU,
4607                                             const char *complete_filename,
4608                                             unsigned complete_line,
4609                                             unsigned complete_column,
4610                                             struct CXUnsavedFile *unsaved_files,
4611                                             unsigned num_unsaved_files,
4612                                             unsigned options);
4613 
4614 /**
4615  * \brief Sort the code-completion results in case-insensitive alphabetical
4616  * order.
4617  *
4618  * \param Results The set of results to sort.
4619  * \param NumResults The number of results in \p Results.
4620  */
4621 CINDEX_LINKAGE
4622 void clang_sortCodeCompletionResults(CXCompletionResult *Results,
4623                                      unsigned NumResults);
4624 
4625 /**
4626  * \brief Free the given set of code-completion results.
4627  */
4628 CINDEX_LINKAGE
4629 void clang_disposeCodeCompleteResults(CXCodeCompleteResults *Results);
4630 
4631 /**
4632  * \brief Determine the number of diagnostics produced prior to the
4633  * location where code completion was performed.
4634  */
4635 CINDEX_LINKAGE
4636 unsigned clang_codeCompleteGetNumDiagnostics(CXCodeCompleteResults *Results);
4637 
4638 /**
4639  * \brief Retrieve a diagnostic associated with the given code completion.
4640  *
4641  * \param Results the code completion results to query.
4642  * \param Index the zero-based diagnostic number to retrieve.
4643  *
4644  * \returns the requested diagnostic. This diagnostic must be freed
4645  * via a call to \c clang_disposeDiagnostic().
4646  */
4647 CINDEX_LINKAGE
4648 CXDiagnostic clang_codeCompleteGetDiagnostic(CXCodeCompleteResults *Results,
4649                                              unsigned Index);
4650 
4651 /**
4652  * \brief Determines what compeltions are appropriate for the context
4653  * the given code completion.
4654  *
4655  * \param Results the code completion results to query
4656  *
4657  * \returns the kinds of completions that are appropriate for use
4658  * along with the given code completion results.
4659  */
4660 CINDEX_LINKAGE
4661 unsigned long long clang_codeCompleteGetContexts(
4662                                                 CXCodeCompleteResults *Results);
4663 
4664 /**
4665  * \brief Returns the cursor kind for the container for the current code
4666  * completion context. The container is only guaranteed to be set for
4667  * contexts where a container exists (i.e. member accesses or Objective-C
4668  * message sends); if there is not a container, this function will return
4669  * CXCursor_InvalidCode.
4670  *
4671  * \param Results the code completion results to query
4672  *
4673  * \param IsIncomplete on return, this value will be false if Clang has complete
4674  * information about the container. If Clang does not have complete
4675  * information, this value will be true.
4676  *
4677  * \returns the container kind, or CXCursor_InvalidCode if there is not a
4678  * container
4679  */
4680 CINDEX_LINKAGE
4681 enum CXCursorKind clang_codeCompleteGetContainerKind(
4682                                                  CXCodeCompleteResults *Results,
4683                                                      unsigned *IsIncomplete);
4684 
4685 /**
4686  * \brief Returns the USR for the container for the current code completion
4687  * context. If there is not a container for the current context, this
4688  * function will return the empty string.
4689  *
4690  * \param Results the code completion results to query
4691  *
4692  * \returns the USR for the container
4693  */
4694 CINDEX_LINKAGE
4695 CXString clang_codeCompleteGetContainerUSR(CXCodeCompleteResults *Results);
4696 
4697 
4698 /**
4699  * \brief Returns the currently-entered selector for an Objective-C message
4700  * send, formatted like "initWithFoo:bar:". Only guaranteed to return a
4701  * non-empty string for CXCompletionContext_ObjCInstanceMessage and
4702  * CXCompletionContext_ObjCClassMessage.
4703  *
4704  * \param Results the code completion results to query
4705  *
4706  * \returns the selector (or partial selector) that has been entered thus far
4707  * for an Objective-C message send.
4708  */
4709 CINDEX_LINKAGE
4710 CXString clang_codeCompleteGetObjCSelector(CXCodeCompleteResults *Results);
4711 
4712 /**
4713  * @}
4714  */
4715 
4716 
4717 /**
4718  * \defgroup CINDEX_MISC Miscellaneous utility functions
4719  *
4720  * @{
4721  */
4722 
4723 /**
4724  * \brief Return a version string, suitable for showing to a user, but not
4725  *        intended to be parsed (the format is not guaranteed to be stable).
4726  */
4727 CINDEX_LINKAGE CXString clang_getClangVersion();
4728 
4729 
4730 /**
4731  * \brief Enable/disable crash recovery.
4732  *
4733  * \param isEnabled Flag to indicate if crash recovery is enabled.  A non-zero
4734  *        value enables crash recovery, while 0 disables it.
4735  */
4736 CINDEX_LINKAGE void clang_toggleCrashRecovery(unsigned isEnabled);
4737 
4738  /**
4739   * \brief Visitor invoked for each file in a translation unit
4740   *        (used with clang_getInclusions()).
4741   *
4742   * This visitor function will be invoked by clang_getInclusions() for each
4743   * file included (either at the top-level or by \#include directives) within
4744   * a translation unit.  The first argument is the file being included, and
4745   * the second and third arguments provide the inclusion stack.  The
4746   * array is sorted in order of immediate inclusion.  For example,
4747   * the first element refers to the location that included 'included_file'.
4748   */
4749 typedef void (*CXInclusionVisitor)(CXFile included_file,
4750                                    CXSourceLocation* inclusion_stack,
4751                                    unsigned include_len,
4752                                    CXClientData client_data);
4753 
4754 /**
4755  * \brief Visit the set of preprocessor inclusions in a translation unit.
4756  *   The visitor function is called with the provided data for every included
4757  *   file.  This does not include headers included by the PCH file (unless one
4758  *   is inspecting the inclusions in the PCH file itself).
4759  */
4760 CINDEX_LINKAGE void clang_getInclusions(CXTranslationUnit tu,
4761                                         CXInclusionVisitor visitor,
4762                                         CXClientData client_data);
4763 
4764 /**
4765  * @}
4766  */
4767 
4768 /** \defgroup CINDEX_REMAPPING Remapping functions
4769  *
4770  * @{
4771  */
4772 
4773 /**
4774  * \brief A remapping of original source files and their translated files.
4775  */
4776 typedef void *CXRemapping;
4777 
4778 /**
4779  * \brief Retrieve a remapping.
4780  *
4781  * \param path the path that contains metadata about remappings.
4782  *
4783  * \returns the requested remapping. This remapping must be freed
4784  * via a call to \c clang_remap_dispose(). Can return NULL if an error occurred.
4785  */
4786 CINDEX_LINKAGE CXRemapping clang_getRemappings(const char *path);
4787 
4788 /**
4789  * \brief Retrieve a remapping.
4790  *
4791  * \param filePaths pointer to an array of file paths containing remapping info.
4792  *
4793  * \param numFiles number of file paths.
4794  *
4795  * \returns the requested remapping. This remapping must be freed
4796  * via a call to \c clang_remap_dispose(). Can return NULL if an error occurred.
4797  */
4798 CINDEX_LINKAGE
4799 CXRemapping clang_getRemappingsFromFileList(const char **filePaths,
4800                                             unsigned numFiles);
4801 
4802 /**
4803  * \brief Determine the number of remappings.
4804  */
4805 CINDEX_LINKAGE unsigned clang_remap_getNumFiles(CXRemapping);
4806 
4807 /**
4808  * \brief Get the original and the associated filename from the remapping.
4809  *
4810  * \param original If non-NULL, will be set to the original filename.
4811  *
4812  * \param transformed If non-NULL, will be set to the filename that the original
4813  * is associated with.
4814  */
4815 CINDEX_LINKAGE void clang_remap_getFilenames(CXRemapping, unsigned index,
4816                                      CXString *original, CXString *transformed);
4817 
4818 /**
4819  * \brief Dispose the remapping.
4820  */
4821 CINDEX_LINKAGE void clang_remap_dispose(CXRemapping);
4822 
4823 /**
4824  * @}
4825  */
4826 
4827 /** \defgroup CINDEX_HIGH Higher level API functions
4828  *
4829  * @{
4830  */
4831 
4832 enum CXVisitorResult {
4833   CXVisit_Break,
4834   CXVisit_Continue
4835 };
4836 
4837 typedef struct {
4838   void *context;
4839   enum CXVisitorResult (*visit)(void *context, CXCursor, CXSourceRange);
4840 } CXCursorAndRangeVisitor;
4841 
4842 /**
4843  * \brief Find references of a declaration in a specific file.
4844  *
4845  * \param cursor pointing to a declaration or a reference of one.
4846  *
4847  * \param file to search for references.
4848  *
4849  * \param visitor callback that will receive pairs of CXCursor/CXSourceRange for
4850  * each reference found.
4851  * The CXSourceRange will point inside the file; if the reference is inside
4852  * a macro (and not a macro argument) the CXSourceRange will be invalid.
4853  */
4854 CINDEX_LINKAGE void clang_findReferencesInFile(CXCursor cursor, CXFile file,
4855                                                CXCursorAndRangeVisitor visitor);
4856 
4857 #ifdef __has_feature
4858 #  if __has_feature(blocks)
4859 
4860 typedef enum CXVisitorResult
4861     (^CXCursorAndRangeVisitorBlock)(CXCursor, CXSourceRange);
4862 
4863 CINDEX_LINKAGE
4864 void clang_findReferencesInFileWithBlock(CXCursor, CXFile,
4865                                          CXCursorAndRangeVisitorBlock);
4866 
4867 #  endif
4868 #endif
4869 
4870 /**
4871  * \brief The client's data object that is associated with a CXFile.
4872  */
4873 typedef void *CXIdxClientFile;
4874 
4875 /**
4876  * \brief The client's data object that is associated with a semantic entity.
4877  */
4878 typedef void *CXIdxClientEntity;
4879 
4880 /**
4881  * \brief The client's data object that is associated with a semantic container
4882  * of entities.
4883  */
4884 typedef void *CXIdxClientContainer;
4885 
4886 /**
4887  * \brief The client's data object that is associated with an AST file (PCH
4888  * or module).
4889  */
4890 typedef void *CXIdxClientASTFile;
4891 
4892 /**
4893  * \brief Source location passed to index callbacks.
4894  */
4895 typedef struct {
4896   void *ptr_data[2];
4897   unsigned int_data;
4898 } CXIdxLoc;
4899 
4900 /**
4901  * \brief Data for ppIncludedFile callback.
4902  */
4903 typedef struct {
4904   /**
4905    * \brief Location of '#' in the \#include/\#import directive.
4906    */
4907   CXIdxLoc hashLoc;
4908   /**
4909    * \brief Filename as written in the \#include/\#import directive.
4910    */
4911   const char *filename;
4912   /**
4913    * \brief The actual file that the \#include/\#import directive resolved to.
4914    */
4915   CXFile file;
4916   int isImport;
4917   int isAngled;
4918 } CXIdxIncludedFileInfo;
4919 
4920 /**
4921  * \brief Data for IndexerCallbacks#importedASTFile.
4922  */
4923 typedef struct {
4924   CXFile file;
4925   /**
4926    * \brief Location where the file is imported. It is useful mostly for
4927    * modules.
4928    */
4929   CXIdxLoc loc;
4930   /**
4931    * \brief Non-zero if the AST file is a module otherwise it's a PCH.
4932    */
4933   int isModule;
4934 } CXIdxImportedASTFileInfo;
4935 
4936 typedef enum {
4937   CXIdxEntity_Unexposed     = 0,
4938   CXIdxEntity_Typedef       = 1,
4939   CXIdxEntity_Function      = 2,
4940   CXIdxEntity_Variable      = 3,
4941   CXIdxEntity_Field         = 4,
4942   CXIdxEntity_EnumConstant  = 5,
4943 
4944   CXIdxEntity_ObjCClass     = 6,
4945   CXIdxEntity_ObjCProtocol  = 7,
4946   CXIdxEntity_ObjCCategory  = 8,
4947 
4948   CXIdxEntity_ObjCInstanceMethod = 9,
4949   CXIdxEntity_ObjCClassMethod    = 10,
4950   CXIdxEntity_ObjCProperty  = 11,
4951   CXIdxEntity_ObjCIvar      = 12,
4952 
4953   CXIdxEntity_Enum          = 13,
4954   CXIdxEntity_Struct        = 14,
4955   CXIdxEntity_Union         = 15,
4956 
4957   CXIdxEntity_CXXClass              = 16,
4958   CXIdxEntity_CXXNamespace          = 17,
4959   CXIdxEntity_CXXNamespaceAlias     = 18,
4960   CXIdxEntity_CXXStaticVariable     = 19,
4961   CXIdxEntity_CXXStaticMethod       = 20,
4962   CXIdxEntity_CXXInstanceMethod     = 21,
4963   CXIdxEntity_CXXConstructor        = 22,
4964   CXIdxEntity_CXXDestructor         = 23,
4965   CXIdxEntity_CXXConversionFunction = 24,
4966   CXIdxEntity_CXXTypeAlias          = 25,
4967   CXIdxEntity_CXXInterface          = 26
4968 
4969 } CXIdxEntityKind;
4970 
4971 typedef enum {
4972   CXIdxEntityLang_None = 0,
4973   CXIdxEntityLang_C    = 1,
4974   CXIdxEntityLang_ObjC = 2,
4975   CXIdxEntityLang_CXX  = 3
4976 } CXIdxEntityLanguage;
4977 
4978 /**
4979  * \brief Extra C++ template information for an entity. This can apply to:
4980  * CXIdxEntity_Function
4981  * CXIdxEntity_CXXClass
4982  * CXIdxEntity_CXXStaticMethod
4983  * CXIdxEntity_CXXInstanceMethod
4984  * CXIdxEntity_CXXConstructor
4985  * CXIdxEntity_CXXConversionFunction
4986  * CXIdxEntity_CXXTypeAlias
4987  */
4988 typedef enum {
4989   CXIdxEntity_NonTemplate   = 0,
4990   CXIdxEntity_Template      = 1,
4991   CXIdxEntity_TemplatePartialSpecialization = 2,
4992   CXIdxEntity_TemplateSpecialization = 3
4993 } CXIdxEntityCXXTemplateKind;
4994 
4995 typedef enum {
4996   CXIdxAttr_Unexposed     = 0,
4997   CXIdxAttr_IBAction      = 1,
4998   CXIdxAttr_IBOutlet      = 2,
4999   CXIdxAttr_IBOutletCollection = 3
5000 } CXIdxAttrKind;
5001 
5002 typedef struct {
5003   CXIdxAttrKind kind;
5004   CXCursor cursor;
5005   CXIdxLoc loc;
5006 } CXIdxAttrInfo;
5007 
5008 typedef struct {
5009   CXIdxEntityKind kind;
5010   CXIdxEntityCXXTemplateKind templateKind;
5011   CXIdxEntityLanguage lang;
5012   const char *name;
5013   const char *USR;
5014   CXCursor cursor;
5015   const CXIdxAttrInfo *const *attributes;
5016   unsigned numAttributes;
5017 } CXIdxEntityInfo;
5018 
5019 typedef struct {
5020   CXCursor cursor;
5021 } CXIdxContainerInfo;
5022 
5023 typedef struct {
5024   const CXIdxAttrInfo *attrInfo;
5025   const CXIdxEntityInfo *objcClass;
5026   CXCursor classCursor;
5027   CXIdxLoc classLoc;
5028 } CXIdxIBOutletCollectionAttrInfo;
5029 
5030 typedef struct {
5031   const CXIdxEntityInfo *entityInfo;
5032   CXCursor cursor;
5033   CXIdxLoc loc;
5034   const CXIdxContainerInfo *semanticContainer;
5035   /**
5036    * \brief Generally same as #semanticContainer but can be different in
5037    * cases like out-of-line C++ member functions.
5038    */
5039   const CXIdxContainerInfo *lexicalContainer;
5040   int isRedeclaration;
5041   int isDefinition;
5042   int isContainer;
5043   const CXIdxContainerInfo *declAsContainer;
5044   /**
5045    * \brief Whether the declaration exists in code or was created implicitly
5046    * by the compiler, e.g. implicit objc methods for properties.
5047    */
5048   int isImplicit;
5049   const CXIdxAttrInfo *const *attributes;
5050   unsigned numAttributes;
5051 } CXIdxDeclInfo;
5052 
5053 typedef enum {
5054   CXIdxObjCContainer_ForwardRef = 0,
5055   CXIdxObjCContainer_Interface = 1,
5056   CXIdxObjCContainer_Implementation = 2
5057 } CXIdxObjCContainerKind;
5058 
5059 typedef struct {
5060   const CXIdxDeclInfo *declInfo;
5061   CXIdxObjCContainerKind kind;
5062 } CXIdxObjCContainerDeclInfo;
5063 
5064 typedef struct {
5065   const CXIdxEntityInfo *base;
5066   CXCursor cursor;
5067   CXIdxLoc loc;
5068 } CXIdxBaseClassInfo;
5069 
5070 typedef struct {
5071   const CXIdxEntityInfo *protocol;
5072   CXCursor cursor;
5073   CXIdxLoc loc;
5074 } CXIdxObjCProtocolRefInfo;
5075 
5076 typedef struct {
5077   const CXIdxObjCProtocolRefInfo *const *protocols;
5078   unsigned numProtocols;
5079 } CXIdxObjCProtocolRefListInfo;
5080 
5081 typedef struct {
5082   const CXIdxObjCContainerDeclInfo *containerInfo;
5083   const CXIdxBaseClassInfo *superInfo;
5084   const CXIdxObjCProtocolRefListInfo *protocols;
5085 } CXIdxObjCInterfaceDeclInfo;
5086 
5087 typedef struct {
5088   const CXIdxObjCContainerDeclInfo *containerInfo;
5089   const CXIdxEntityInfo *objcClass;
5090   CXCursor classCursor;
5091   CXIdxLoc classLoc;
5092   const CXIdxObjCProtocolRefListInfo *protocols;
5093 } CXIdxObjCCategoryDeclInfo;
5094 
5095 typedef struct {
5096   const CXIdxDeclInfo *declInfo;
5097   const CXIdxEntityInfo *getter;
5098   const CXIdxEntityInfo *setter;
5099 } CXIdxObjCPropertyDeclInfo;
5100 
5101 typedef struct {
5102   const CXIdxDeclInfo *declInfo;
5103   const CXIdxBaseClassInfo *const *bases;
5104   unsigned numBases;
5105 } CXIdxCXXClassDeclInfo;
5106 
5107 /**
5108  * \brief Data for IndexerCallbacks#indexEntityReference.
5109  */
5110 typedef enum {
5111   /**
5112    * \brief The entity is referenced directly in user's code.
5113    */
5114   CXIdxEntityRef_Direct = 1,
5115   /**
5116    * \brief An implicit reference, e.g. a reference of an ObjC method via the
5117    * dot syntax.
5118    */
5119   CXIdxEntityRef_Implicit = 2
5120 } CXIdxEntityRefKind;
5121 
5122 /**
5123  * \brief Data for IndexerCallbacks#indexEntityReference.
5124  */
5125 typedef struct {
5126   CXIdxEntityRefKind kind;
5127   /**
5128    * \brief Reference cursor.
5129    */
5130   CXCursor cursor;
5131   CXIdxLoc loc;
5132   /**
5133    * \brief The entity that gets referenced.
5134    */
5135   const CXIdxEntityInfo *referencedEntity;
5136   /**
5137    * \brief Immediate "parent" of the reference. For example:
5138    *
5139    * \code
5140    * Foo *var;
5141    * \endcode
5142    *
5143    * The parent of reference of type 'Foo' is the variable 'var'.
5144    * For references inside statement bodies of functions/methods,
5145    * the parentEntity will be the function/method.
5146    */
5147   const CXIdxEntityInfo *parentEntity;
5148   /**
5149    * \brief Lexical container context of the reference.
5150    */
5151   const CXIdxContainerInfo *container;
5152 } CXIdxEntityRefInfo;
5153 
5154 /**
5155  * \brief A group of callbacks used by #clang_indexSourceFile and
5156  * #clang_indexTranslationUnit.
5157  */
5158 typedef struct {
5159   /**
5160    * \brief Called periodically to check whether indexing should be aborted.
5161    * Should return 0 to continue, and non-zero to abort.
5162    */
5163   int (*abortQuery)(CXClientData client_data, void *reserved);
5164 
5165   /**
5166    * \brief Called at the end of indexing; passes the complete diagnostic set.
5167    */
5168   void (*diagnostic)(CXClientData client_data,
5169                      CXDiagnosticSet, void *reserved);
5170 
5171   CXIdxClientFile (*enteredMainFile)(CXClientData client_data,
5172                                      CXFile mainFile, void *reserved);
5173 
5174   /**
5175    * \brief Called when a file gets \#included/\#imported.
5176    */
5177   CXIdxClientFile (*ppIncludedFile)(CXClientData client_data,
5178                                     const CXIdxIncludedFileInfo *);
5179 
5180   /**
5181    * \brief Called when a AST file (PCH or module) gets imported.
5182    *
5183    * AST files will not get indexed (there will not be callbacks to index all
5184    * the entities in an AST file). The recommended action is that, if the AST
5185    * file is not already indexed, to block further indexing and initiate a new
5186    * indexing job specific to the AST file.
5187    */
5188   CXIdxClientASTFile (*importedASTFile)(CXClientData client_data,
5189                                         const CXIdxImportedASTFileInfo *);
5190 
5191   /**
5192    * \brief Called at the beginning of indexing a translation unit.
5193    */
5194   CXIdxClientContainer (*startedTranslationUnit)(CXClientData client_data,
5195                                                  void *reserved);
5196 
5197   void (*indexDeclaration)(CXClientData client_data,
5198                            const CXIdxDeclInfo *);
5199 
5200   /**
5201    * \brief Called to index a reference of an entity.
5202    */
5203   void (*indexEntityReference)(CXClientData client_data,
5204                                const CXIdxEntityRefInfo *);
5205 
5206 } IndexerCallbacks;
5207 
5208 CINDEX_LINKAGE int clang_index_isEntityObjCContainerKind(CXIdxEntityKind);
5209 CINDEX_LINKAGE const CXIdxObjCContainerDeclInfo *
5210 clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *);
5211 
5212 CINDEX_LINKAGE const CXIdxObjCInterfaceDeclInfo *
5213 clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *);
5214 
5215 CINDEX_LINKAGE
5216 const CXIdxObjCCategoryDeclInfo *
5217 clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *);
5218 
5219 CINDEX_LINKAGE const CXIdxObjCProtocolRefListInfo *
5220 clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *);
5221 
5222 CINDEX_LINKAGE const CXIdxObjCPropertyDeclInfo *
5223 clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *);
5224 
5225 CINDEX_LINKAGE const CXIdxIBOutletCollectionAttrInfo *
5226 clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *);
5227 
5228 CINDEX_LINKAGE const CXIdxCXXClassDeclInfo *
5229 clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *);
5230 
5231 /**
5232  * \brief For retrieving a custom CXIdxClientContainer attached to a
5233  * container.
5234  */
5235 CINDEX_LINKAGE CXIdxClientContainer
5236 clang_index_getClientContainer(const CXIdxContainerInfo *);
5237 
5238 /**
5239  * \brief For setting a custom CXIdxClientContainer attached to a
5240  * container.
5241  */
5242 CINDEX_LINKAGE void
5243 clang_index_setClientContainer(const CXIdxContainerInfo *,CXIdxClientContainer);
5244 
5245 /**
5246  * \brief For retrieving a custom CXIdxClientEntity attached to an entity.
5247  */
5248 CINDEX_LINKAGE CXIdxClientEntity
5249 clang_index_getClientEntity(const CXIdxEntityInfo *);
5250 
5251 /**
5252  * \brief For setting a custom CXIdxClientEntity attached to an entity.
5253  */
5254 CINDEX_LINKAGE void
5255 clang_index_setClientEntity(const CXIdxEntityInfo *, CXIdxClientEntity);
5256 
5257 /**
5258  * \brief An indexing action, to be applied to one or multiple translation units
5259  * but not on concurrent threads. If there are threads doing indexing
5260  * concurrently, they should use different CXIndexAction objects.
5261  */
5262 typedef void *CXIndexAction;
5263 
5264 /**
5265  * \brief An indexing action, to be applied to one or multiple translation units
5266  * but not on concurrent threads. If there are threads doing indexing
5267  * concurrently, they should use different CXIndexAction objects.
5268  *
5269  * \param CIdx The index object with which the index action will be associated.
5270  */
5271 CINDEX_LINKAGE CXIndexAction clang_IndexAction_create(CXIndex CIdx);
5272 
5273 /**
5274  * \brief Destroy the given index action.
5275  *
5276  * The index action must not be destroyed until all of the translation units
5277  * created within that index action have been destroyed.
5278  */
5279 CINDEX_LINKAGE void clang_IndexAction_dispose(CXIndexAction);
5280 
5281 typedef enum {
5282   /**
5283    * \brief Used to indicate that no special indexing options are needed.
5284    */
5285   CXIndexOpt_None = 0x0,
5286 
5287   /**
5288    * \brief Used to indicate that IndexerCallbacks#indexEntityReference should
5289    * be invoked for only one reference of an entity per source file that does
5290    * not also include a declaration/definition of the entity.
5291    */
5292   CXIndexOpt_SuppressRedundantRefs = 0x1,
5293 
5294   /**
5295    * \brief Function-local symbols should be indexed. If this is not set
5296    * function-local symbols will be ignored.
5297    */
5298   CXIndexOpt_IndexFunctionLocalSymbols = 0x2,
5299 
5300   /**
5301    * \brief Implicit function/class template instantiations should be indexed.
5302    * If this is not set, implicit instantiations will be ignored.
5303    */
5304   CXIndexOpt_IndexImplicitTemplateInstantiations = 0x4,
5305 
5306   /**
5307    * \brief Suppress all compiler warnings when parsing for indexing.
5308    */
5309   CXIndexOpt_SuppressWarnings = 0x8
5310 } CXIndexOptFlags;
5311 
5312 /**
5313  * \brief Index the given source file and the translation unit corresponding
5314  * to that file via callbacks implemented through #IndexerCallbacks.
5315  *
5316  * \param client_data pointer data supplied by the client, which will
5317  * be passed to the invoked callbacks.
5318  *
5319  * \param index_callbacks Pointer to indexing callbacks that the client
5320  * implements.
5321  *
5322  * \param index_callbacks_size Size of #IndexerCallbacks structure that gets
5323  * passed in index_callbacks.
5324  *
5325  * \param index_options A bitmask of options that affects how indexing is
5326  * performed. This should be a bitwise OR of the CXIndexOpt_XXX flags.
5327  *
5328  * \param out_TU [out] pointer to store a CXTranslationUnit that can be reused
5329  * after indexing is finished. Set to NULL if you do not require it.
5330  *
5331  * \returns If there is a failure from which the there is no recovery, returns
5332  * non-zero, otherwise returns 0.
5333  *
5334  * The rest of the parameters are the same as #clang_parseTranslationUnit.
5335  */
5336 CINDEX_LINKAGE int clang_indexSourceFile(CXIndexAction,
5337                                          CXClientData client_data,
5338                                          IndexerCallbacks *index_callbacks,
5339                                          unsigned index_callbacks_size,
5340                                          unsigned index_options,
5341                                          const char *source_filename,
5342                                          const char * const *command_line_args,
5343                                          int num_command_line_args,
5344                                          struct CXUnsavedFile *unsaved_files,
5345                                          unsigned num_unsaved_files,
5346                                          CXTranslationUnit *out_TU,
5347                                          unsigned TU_options);
5348 
5349 /**
5350  * \brief Index the given translation unit via callbacks implemented through
5351  * #IndexerCallbacks.
5352  *
5353  * The order of callback invocations is not guaranteed to be the same as
5354  * when indexing a source file. The high level order will be:
5355  *
5356  *   -Preprocessor callbacks invocations
5357  *   -Declaration/reference callbacks invocations
5358  *   -Diagnostic callback invocations
5359  *
5360  * The parameters are the same as #clang_indexSourceFile.
5361  *
5362  * \returns If there is a failure from which the there is no recovery, returns
5363  * non-zero, otherwise returns 0.
5364  */
5365 CINDEX_LINKAGE int clang_indexTranslationUnit(CXIndexAction,
5366                                               CXClientData client_data,
5367                                               IndexerCallbacks *index_callbacks,
5368                                               unsigned index_callbacks_size,
5369                                               unsigned index_options,
5370                                               CXTranslationUnit);
5371 
5372 /**
5373  * \brief Retrieve the CXIdxFile, file, line, column, and offset represented by
5374  * the given CXIdxLoc.
5375  *
5376  * If the location refers into a macro expansion, retrieves the
5377  * location of the macro expansion and if it refers into a macro argument
5378  * retrieves the location of the argument.
5379  */
5380 CINDEX_LINKAGE void clang_indexLoc_getFileLocation(CXIdxLoc loc,
5381                                                    CXIdxClientFile *indexFile,
5382                                                    CXFile *file,
5383                                                    unsigned *line,
5384                                                    unsigned *column,
5385                                                    unsigned *offset);
5386 
5387 /**
5388  * \brief Retrieve the CXSourceLocation represented by the given CXIdxLoc.
5389  */
5390 CINDEX_LINKAGE
5391 CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc loc);
5392 
5393 /**
5394  * @}
5395  */
5396 
5397 /**
5398  * @}
5399  */
5400 
5401 #ifdef __cplusplus
5402 }
5403 #endif
5404 #endif
5405 
5406