CXCursor.cpp revision 61eee0ca33b29e102f11bab77c8b74cc00e2392b 
1//===- CXCursor.cpp - Routines for manipulating CXCursors -----------------===//
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 file defines routines for manipulating CXCursors. It should be the
11// only file that has internal knowledge of the encoding of the data in
12// CXCursor.
13//
14//===----------------------------------------------------------------------===//
15
16#include "CXTranslationUnit.h"
17#include "CXCursor.h"
18#include "CXString.h"
19#include "clang/Frontend/ASTUnit.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/Expr.h"
24#include "clang/AST/ExprCXX.h"
25#include "clang-c/Index.h"
26#include "llvm/Support/ErrorHandling.h"
27
28using namespace clang;
29using namespace cxcursor;
30
31CXCursor cxcursor::MakeCXCursorInvalid(CXCursorKind K) {
32  assert(K >= CXCursor_FirstInvalid && K <= CXCursor_LastInvalid);
33  CXCursor C = { K, { 0, 0, 0 } };
34  return C;
35}
36
37static CXCursorKind GetCursorKind(const Attr *A) {
38  assert(A && "Invalid arguments!");
39  switch (A->getKind()) {
40    default: break;
41    case attr::IBAction: return CXCursor_IBActionAttr;
42    case attr::IBOutlet: return CXCursor_IBOutletAttr;
43    case attr::IBOutletCollection: return CXCursor_IBOutletCollectionAttr;
44  }
45
46  return CXCursor_UnexposedAttr;
47}
48
49CXCursor cxcursor::MakeCXCursor(const Attr *A, Decl *Parent,
50                                CXTranslationUnit TU) {
51  assert(A && Parent && TU && "Invalid arguments!");
52  CXCursor C = { GetCursorKind(A), { Parent, (void*)A, TU } };
53  return C;
54}
55
56CXCursor cxcursor::MakeCXCursor(Decl *D, CXTranslationUnit TU,
57                                bool FirstInDeclGroup) {
58  assert(D && TU && "Invalid arguments!");
59  CXCursor C = { getCursorKindForDecl(D),
60                 { D, (void*)(intptr_t) (FirstInDeclGroup ? 1 : 0), TU }
61               };
62  return C;
63}
64
65CXCursor cxcursor::MakeCXCursor(Stmt *S, Decl *Parent,
66                                CXTranslationUnit TU) {
67  assert(S && TU && "Invalid arguments!");
68  CXCursorKind K = CXCursor_NotImplemented;
69
70  switch (S->getStmtClass()) {
71  case Stmt::NoStmtClass:
72    break;
73
74  case Stmt::NullStmtClass:
75  case Stmt::CompoundStmtClass:
76  case Stmt::CaseStmtClass:
77  case Stmt::DefaultStmtClass:
78  case Stmt::IfStmtClass:
79  case Stmt::SwitchStmtClass:
80  case Stmt::WhileStmtClass:
81  case Stmt::DoStmtClass:
82  case Stmt::ForStmtClass:
83  case Stmt::GotoStmtClass:
84  case Stmt::IndirectGotoStmtClass:
85  case Stmt::ContinueStmtClass:
86  case Stmt::BreakStmtClass:
87  case Stmt::ReturnStmtClass:
88  case Stmt::DeclStmtClass:
89  case Stmt::AsmStmtClass:
90  case Stmt::ObjCAtTryStmtClass:
91  case Stmt::ObjCAtCatchStmtClass:
92  case Stmt::ObjCAtFinallyStmtClass:
93  case Stmt::ObjCAtThrowStmtClass:
94  case Stmt::ObjCAtSynchronizedStmtClass:
95  case Stmt::ObjCForCollectionStmtClass:
96  case Stmt::CXXCatchStmtClass:
97  case Stmt::CXXTryStmtClass:
98  case Stmt::CXXForRangeStmtClass:
99  case Stmt::SEHTryStmtClass:
100  case Stmt::SEHExceptStmtClass:
101  case Stmt::SEHFinallyStmtClass:
102    K = CXCursor_UnexposedStmt;
103    break;
104
105  case Stmt::LabelStmtClass:
106    K = CXCursor_LabelStmt;
107    break;
108
109  case Stmt::PredefinedExprClass:
110  case Stmt::IntegerLiteralClass:
111  case Stmt::FloatingLiteralClass:
112  case Stmt::ImaginaryLiteralClass:
113  case Stmt::StringLiteralClass:
114  case Stmt::CharacterLiteralClass:
115  case Stmt::ParenExprClass:
116  case Stmt::UnaryOperatorClass:
117  case Stmt::OffsetOfExprClass:
118  case Stmt::UnaryExprOrTypeTraitExprClass:
119  case Stmt::ArraySubscriptExprClass:
120  case Stmt::BinaryOperatorClass:
121  case Stmt::CompoundAssignOperatorClass:
122  case Stmt::ConditionalOperatorClass:
123  case Stmt::BinaryConditionalOperatorClass:
124  case Stmt::ImplicitCastExprClass:
125  case Stmt::CStyleCastExprClass:
126  case Stmt::CompoundLiteralExprClass:
127  case Stmt::ExtVectorElementExprClass:
128  case Stmt::InitListExprClass:
129  case Stmt::DesignatedInitExprClass:
130  case Stmt::ImplicitValueInitExprClass:
131  case Stmt::ParenListExprClass:
132  case Stmt::VAArgExprClass:
133  case Stmt::AddrLabelExprClass:
134  case Stmt::StmtExprClass:
135  case Stmt::ChooseExprClass:
136  case Stmt::GenericSelectionExprClass:
137  case Stmt::GNUNullExprClass:
138  case Stmt::CXXStaticCastExprClass:
139  case Stmt::CXXDynamicCastExprClass:
140  case Stmt::CXXReinterpretCastExprClass:
141  case Stmt::CXXConstCastExprClass:
142  case Stmt::CXXFunctionalCastExprClass:
143  case Stmt::CXXTypeidExprClass:
144  case Stmt::CXXUuidofExprClass:
145  case Stmt::CXXBoolLiteralExprClass:
146  case Stmt::CXXNullPtrLiteralExprClass:
147  case Stmt::CXXThisExprClass:
148  case Stmt::CXXThrowExprClass:
149  case Stmt::CXXDefaultArgExprClass:
150  case Stmt::CXXScalarValueInitExprClass:
151  case Stmt::CXXNewExprClass:
152  case Stmt::CXXDeleteExprClass:
153  case Stmt::CXXPseudoDestructorExprClass:
154  case Stmt::UnresolvedLookupExprClass:
155  case Stmt::UnaryTypeTraitExprClass:
156  case Stmt::BinaryTypeTraitExprClass:
157  case Stmt::ArrayTypeTraitExprClass:
158  case Stmt::ExpressionTraitExprClass:
159  case Stmt::DependentScopeDeclRefExprClass:
160  case Stmt::CXXBindTemporaryExprClass:
161  case Stmt::ExprWithCleanupsClass:
162  case Stmt::CXXUnresolvedConstructExprClass:
163  case Stmt::CXXDependentScopeMemberExprClass:
164  case Stmt::UnresolvedMemberExprClass:
165  case Stmt::CXXNoexceptExprClass:
166  case Stmt::ObjCStringLiteralClass:
167  case Stmt::ObjCEncodeExprClass:
168  case Stmt::ObjCSelectorExprClass:
169  case Stmt::ObjCProtocolExprClass:
170  case Stmt::ObjCIsaExprClass:
171  case Stmt::ShuffleVectorExprClass:
172  case Stmt::BlockExprClass:
173  case Stmt::OpaqueValueExprClass:
174  case Stmt::PackExpansionExprClass:
175  case Stmt::SizeOfPackExprClass:
176  case Stmt::AsTypeExprClass:
177    K = CXCursor_UnexposedExpr;
178    break;
179
180  case Stmt::DeclRefExprClass:
181  case Stmt::BlockDeclRefExprClass:
182  case Stmt::SubstNonTypeTemplateParmPackExprClass:
183    // FIXME: UnresolvedLookupExpr?
184    // FIXME: DependentScopeDeclRefExpr?
185    K = CXCursor_DeclRefExpr;
186    break;
187
188  case Stmt::MemberExprClass:
189  case Stmt::ObjCIvarRefExprClass:
190  case Stmt::ObjCPropertyRefExprClass:
191    // FIXME: UnresolvedMemberExpr?
192    // FIXME: CXXDependentScopeMemberExpr?
193    K = CXCursor_MemberRefExpr;
194    break;
195
196  case Stmt::CallExprClass:
197  case Stmt::CXXOperatorCallExprClass:
198  case Stmt::CXXMemberCallExprClass:
199  case Stmt::CUDAKernelCallExprClass:
200  case Stmt::CXXConstructExprClass:
201  case Stmt::CXXTemporaryObjectExprClass:
202    // FIXME: CXXUnresolvedConstructExpr
203    K = CXCursor_CallExpr;
204    break;
205
206  case Stmt::ObjCMessageExprClass:
207    K = CXCursor_ObjCMessageExpr;
208    break;
209  }
210
211  CXCursor C = { K, { Parent, S, TU } };
212  return C;
213}
214
215CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
216                                               SourceLocation Loc,
217                                               CXTranslationUnit TU) {
218  assert(Super && TU && "Invalid arguments!");
219  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
220  CXCursor C = { CXCursor_ObjCSuperClassRef, { Super, RawLoc, TU } };
221  return C;
222}
223
224std::pair<ObjCInterfaceDecl *, SourceLocation>
225cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
226  assert(C.kind == CXCursor_ObjCSuperClassRef);
227  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
228           SourceLocation::getFromRawEncoding(
229                                      reinterpret_cast<uintptr_t>(C.data[1])));
230}
231
232CXCursor cxcursor::MakeCursorObjCProtocolRef(ObjCProtocolDecl *Super,
233                                             SourceLocation Loc,
234                                             CXTranslationUnit TU) {
235  assert(Super && TU && "Invalid arguments!");
236  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
237  CXCursor C = { CXCursor_ObjCProtocolRef, { Super, RawLoc, TU } };
238  return C;
239}
240
241std::pair<ObjCProtocolDecl *, SourceLocation>
242cxcursor::getCursorObjCProtocolRef(CXCursor C) {
243  assert(C.kind == CXCursor_ObjCProtocolRef);
244  return std::make_pair(static_cast<ObjCProtocolDecl *>(C.data[0]),
245           SourceLocation::getFromRawEncoding(
246                                      reinterpret_cast<uintptr_t>(C.data[1])));
247}
248
249CXCursor cxcursor::MakeCursorObjCClassRef(ObjCInterfaceDecl *Class,
250                                          SourceLocation Loc,
251                                          CXTranslationUnit TU) {
252  // 'Class' can be null for invalid code.
253  if (!Class)
254    return MakeCXCursorInvalid(CXCursor_InvalidCode);
255  assert(TU && "Invalid arguments!");
256  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
257  CXCursor C = { CXCursor_ObjCClassRef, { Class, RawLoc, TU } };
258  return C;
259}
260
261std::pair<ObjCInterfaceDecl *, SourceLocation>
262cxcursor::getCursorObjCClassRef(CXCursor C) {
263  assert(C.kind == CXCursor_ObjCClassRef);
264  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
265           SourceLocation::getFromRawEncoding(
266                                      reinterpret_cast<uintptr_t>(C.data[1])));
267}
268
269CXCursor cxcursor::MakeCursorTypeRef(TypeDecl *Type, SourceLocation Loc,
270                                     CXTranslationUnit TU) {
271  assert(Type && TU && "Invalid arguments!");
272  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
273  CXCursor C = { CXCursor_TypeRef, { Type, RawLoc, TU } };
274  return C;
275}
276
277std::pair<TypeDecl *, SourceLocation>
278cxcursor::getCursorTypeRef(CXCursor C) {
279  assert(C.kind == CXCursor_TypeRef);
280  return std::make_pair(static_cast<TypeDecl *>(C.data[0]),
281           SourceLocation::getFromRawEncoding(
282                                      reinterpret_cast<uintptr_t>(C.data[1])));
283}
284
285CXCursor cxcursor::MakeCursorTemplateRef(TemplateDecl *Template,
286                                         SourceLocation Loc,
287                                         CXTranslationUnit TU) {
288  assert(Template && TU && "Invalid arguments!");
289  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
290  CXCursor C = { CXCursor_TemplateRef, { Template, RawLoc, TU } };
291  return C;
292}
293
294std::pair<TemplateDecl *, SourceLocation>
295cxcursor::getCursorTemplateRef(CXCursor C) {
296  assert(C.kind == CXCursor_TemplateRef);
297  return std::make_pair(static_cast<TemplateDecl *>(C.data[0]),
298                        SourceLocation::getFromRawEncoding(
299                                       reinterpret_cast<uintptr_t>(C.data[1])));
300}
301
302CXCursor cxcursor::MakeCursorNamespaceRef(NamedDecl *NS, SourceLocation Loc,
303                                          CXTranslationUnit TU) {
304
305  assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
306         "Invalid arguments!");
307  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
308  CXCursor C = { CXCursor_NamespaceRef, { NS, RawLoc, TU } };
309  return C;
310}
311
312std::pair<NamedDecl *, SourceLocation>
313cxcursor::getCursorNamespaceRef(CXCursor C) {
314  assert(C.kind == CXCursor_NamespaceRef);
315  return std::make_pair(static_cast<NamedDecl *>(C.data[0]),
316                        SourceLocation::getFromRawEncoding(
317                                       reinterpret_cast<uintptr_t>(C.data[1])));
318}
319
320CXCursor cxcursor::MakeCursorMemberRef(FieldDecl *Field, SourceLocation Loc,
321                                       CXTranslationUnit TU) {
322
323  assert(Field && TU && "Invalid arguments!");
324  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
325  CXCursor C = { CXCursor_MemberRef, { Field, RawLoc, TU } };
326  return C;
327}
328
329std::pair<FieldDecl *, SourceLocation>
330cxcursor::getCursorMemberRef(CXCursor C) {
331  assert(C.kind == CXCursor_MemberRef);
332  return std::make_pair(static_cast<FieldDecl *>(C.data[0]),
333                        SourceLocation::getFromRawEncoding(
334                                       reinterpret_cast<uintptr_t>(C.data[1])));
335}
336
337CXCursor cxcursor::MakeCursorCXXBaseSpecifier(CXXBaseSpecifier *B,
338                                              CXTranslationUnit TU){
339  CXCursor C = { CXCursor_CXXBaseSpecifier, { B, 0, TU } };
340  return C;
341}
342
343CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
344  assert(C.kind == CXCursor_CXXBaseSpecifier);
345  return static_cast<CXXBaseSpecifier*>(C.data[0]);
346}
347
348CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
349                                                    CXTranslationUnit TU) {
350  CXCursor C = { CXCursor_PreprocessingDirective,
351                 { reinterpret_cast<void *>(Range.getBegin().getRawEncoding()),
352                   reinterpret_cast<void *>(Range.getEnd().getRawEncoding()),
353                   TU }
354               };
355  return C;
356}
357
358SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
359  assert(C.kind == CXCursor_PreprocessingDirective);
360  return SourceRange(SourceLocation::getFromRawEncoding(
361                                      reinterpret_cast<uintptr_t> (C.data[0])),
362                     SourceLocation::getFromRawEncoding(
363                                      reinterpret_cast<uintptr_t> (C.data[1])));
364}
365
366CXCursor cxcursor::MakeMacroDefinitionCursor(MacroDefinition *MI,
367                                             CXTranslationUnit TU) {
368  CXCursor C = { CXCursor_MacroDefinition, { MI, 0, TU } };
369  return C;
370}
371
372MacroDefinition *cxcursor::getCursorMacroDefinition(CXCursor C) {
373  assert(C.kind == CXCursor_MacroDefinition);
374  return static_cast<MacroDefinition *>(C.data[0]);
375}
376
377CXCursor cxcursor::MakeMacroInstantiationCursor(MacroInstantiation *MI,
378                                                CXTranslationUnit TU) {
379  CXCursor C = { CXCursor_MacroInstantiation, { MI, 0, TU } };
380  return C;
381}
382
383MacroInstantiation *cxcursor::getCursorMacroInstantiation(CXCursor C) {
384  assert(C.kind == CXCursor_MacroInstantiation);
385  return static_cast<MacroInstantiation *>(C.data[0]);
386}
387
388CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
389                                                CXTranslationUnit TU) {
390  CXCursor C = { CXCursor_InclusionDirective, { ID, 0, TU } };
391  return C;
392}
393
394InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
395  assert(C.kind == CXCursor_InclusionDirective);
396  return static_cast<InclusionDirective *>(C.data[0]);
397}
398
399CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
400                                      CXTranslationUnit TU) {
401
402  assert(Label && TU && "Invalid arguments!");
403  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
404  CXCursor C = { CXCursor_LabelRef, { Label, RawLoc, TU } };
405  return C;
406}
407
408std::pair<LabelStmt*, SourceLocation>
409cxcursor::getCursorLabelRef(CXCursor C) {
410  assert(C.kind == CXCursor_LabelRef);
411  return std::make_pair(static_cast<LabelStmt *>(C.data[0]),
412                        SourceLocation::getFromRawEncoding(
413                                       reinterpret_cast<uintptr_t>(C.data[1])));
414}
415
416CXCursor cxcursor::MakeCursorOverloadedDeclRef(OverloadExpr *E,
417                                               CXTranslationUnit TU) {
418  assert(E && TU && "Invalid arguments!");
419  OverloadedDeclRefStorage Storage(E);
420  void *RawLoc = reinterpret_cast<void *>(E->getNameLoc().getRawEncoding());
421  CXCursor C = {
422                 CXCursor_OverloadedDeclRef,
423                 { Storage.getOpaqueValue(), RawLoc, TU }
424               };
425  return C;
426}
427
428CXCursor cxcursor::MakeCursorOverloadedDeclRef(Decl *D,
429                                               SourceLocation Loc,
430                                               CXTranslationUnit TU) {
431  assert(D && TU && "Invalid arguments!");
432  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
433  OverloadedDeclRefStorage Storage(D);
434  CXCursor C = {
435    CXCursor_OverloadedDeclRef,
436    { Storage.getOpaqueValue(), RawLoc, TU }
437  };
438  return C;
439}
440
441CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
442                                               SourceLocation Loc,
443                                               CXTranslationUnit TU) {
444  assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
445  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
446  OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
447  CXCursor C = {
448    CXCursor_OverloadedDeclRef,
449    { Storage.getOpaqueValue(), RawLoc, TU }
450  };
451  return C;
452}
453
454std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
455cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
456  assert(C.kind == CXCursor_OverloadedDeclRef);
457  return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(C.data[0]),
458                        SourceLocation::getFromRawEncoding(
459                                       reinterpret_cast<uintptr_t>(C.data[1])));
460}
461
462Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
463  return (Decl *)Cursor.data[0];
464}
465
466Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
467  return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
468}
469
470Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
471  if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
472      Cursor.kind == CXCursor_ObjCProtocolRef ||
473      Cursor.kind == CXCursor_ObjCClassRef)
474    return 0;
475
476  return (Stmt *)Cursor.data[1];
477}
478
479Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
480  return (Attr *)Cursor.data[1];
481}
482
483ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
484  return getCursorASTUnit(Cursor)->getASTContext();
485}
486
487ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
488  return static_cast<ASTUnit *>(static_cast<CXTranslationUnit>(Cursor.data[2])
489                                  ->TUData);
490}
491
492CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
493  return static_cast<CXTranslationUnit>(Cursor.data[2]);
494}
495
496bool cxcursor::operator==(CXCursor X, CXCursor Y) {
497  return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
498         X.data[2] == Y.data[2];
499}
500
501// FIXME: Remove once we can model DeclGroups and their appropriate ranges
502// properly in the ASTs.
503bool cxcursor::isFirstInDeclGroup(CXCursor C) {
504  assert(clang_isDeclaration(C.kind));
505  return ((uintptr_t) (C.data[1])) != 0;
506}
507
508//===----------------------------------------------------------------------===//
509// CXCursorSet.
510//===----------------------------------------------------------------------===//
511
512typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
513
514static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
515  return (CXCursorSet) setImpl;
516}
517static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
518  return (CXCursorSet_Impl*) set;
519}
520namespace llvm {
521template<> struct DenseMapInfo<CXCursor> {
522public:
523  static inline CXCursor getEmptyKey() {
524    return MakeCXCursorInvalid(CXCursor_InvalidFile);
525  }
526  static inline CXCursor getTombstoneKey() {
527    return MakeCXCursorInvalid(CXCursor_NoDeclFound);
528  }
529  static inline unsigned getHashValue(const CXCursor &cursor) {
530    return llvm::DenseMapInfo<std::pair<void*,void*> >
531      ::getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
532  }
533  static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
534    return x.kind == y.kind &&
535           x.data[0] == y.data[0] &&
536           x.data[1] == y.data[1];
537  }
538};
539}
540
541extern "C" {
542CXCursorSet clang_createCXCursorSet() {
543  return packCXCursorSet(new CXCursorSet_Impl());
544}
545
546void clang_disposeCXCursorSet(CXCursorSet set) {
547  delete unpackCXCursorSet(set);
548}
549
550unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
551  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
552  if (!setImpl)
553    return 0;
554  return setImpl->find(cursor) == setImpl->end();
555}
556
557unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
558  // Do not insert invalid cursors into the set.
559  if (cursor.kind >= CXCursor_FirstInvalid &&
560      cursor.kind <= CXCursor_LastInvalid)
561    return 1;
562
563  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
564  if (!setImpl)
565    return 1;
566  unsigned &entry = (*setImpl)[cursor];
567  unsigned flag = entry == 0 ? 1 : 0;
568  entry = 1;
569  return flag;
570}
571} // end: extern "C"
572