CXCursor.cpp revision 6639e9255489ad8e10278d5658fdd4b3c0e1e4cd 
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    case attr::Final: return CXCursor_CXXFinalAttr;
45    case attr::Override: return CXCursor_CXXOverrideAttr;
46  }
47
48  return CXCursor_UnexposedAttr;
49}
50
51CXCursor cxcursor::MakeCXCursor(const Attr *A, Decl *Parent,
52                                CXTranslationUnit TU) {
53  assert(A && Parent && TU && "Invalid arguments!");
54  CXCursor C = { GetCursorKind(A), { Parent, (void*)A, TU } };
55  return C;
56}
57
58CXCursor cxcursor::MakeCXCursor(Decl *D, CXTranslationUnit TU,
59                                bool FirstInDeclGroup) {
60  assert(D && TU && "Invalid arguments!");
61  CXCursor C = { getCursorKindForDecl(D),
62                 { D, (void*)(intptr_t) (FirstInDeclGroup ? 1 : 0), TU }
63               };
64  return C;
65}
66
67CXCursor cxcursor::MakeCXCursor(Stmt *S, Decl *Parent,
68                                CXTranslationUnit TU) {
69  assert(S && TU && "Invalid arguments!");
70  CXCursorKind K = CXCursor_NotImplemented;
71
72  switch (S->getStmtClass()) {
73  case Stmt::NoStmtClass:
74    break;
75
76  case Stmt::NullStmtClass:
77  case Stmt::CompoundStmtClass:
78  case Stmt::CaseStmtClass:
79  case Stmt::DefaultStmtClass:
80  case Stmt::IfStmtClass:
81  case Stmt::SwitchStmtClass:
82  case Stmt::WhileStmtClass:
83  case Stmt::DoStmtClass:
84  case Stmt::ForStmtClass:
85  case Stmt::GotoStmtClass:
86  case Stmt::IndirectGotoStmtClass:
87  case Stmt::ContinueStmtClass:
88  case Stmt::BreakStmtClass:
89  case Stmt::ReturnStmtClass:
90  case Stmt::DeclStmtClass:
91  case Stmt::AsmStmtClass:
92  case Stmt::ObjCAtTryStmtClass:
93  case Stmt::ObjCAtCatchStmtClass:
94  case Stmt::ObjCAtFinallyStmtClass:
95  case Stmt::ObjCAtThrowStmtClass:
96  case Stmt::ObjCAtSynchronizedStmtClass:
97  case Stmt::ObjCAutoreleasePoolStmtClass:
98  case Stmt::ObjCForCollectionStmtClass:
99  case Stmt::CXXCatchStmtClass:
100  case Stmt::CXXTryStmtClass:
101  case Stmt::CXXForRangeStmtClass:
102  case Stmt::SEHTryStmtClass:
103  case Stmt::SEHExceptStmtClass:
104  case Stmt::SEHFinallyStmtClass:
105  case Stmt::MaterializeTemporaryExprClass:
106    K = CXCursor_UnexposedStmt;
107    break;
108
109  case Stmt::LabelStmtClass:
110    K = CXCursor_LabelStmt;
111    break;
112
113  case Stmt::PredefinedExprClass:
114  case Stmt::IntegerLiteralClass:
115  case Stmt::FloatingLiteralClass:
116  case Stmt::ImaginaryLiteralClass:
117  case Stmt::StringLiteralClass:
118  case Stmt::CharacterLiteralClass:
119  case Stmt::ParenExprClass:
120  case Stmt::UnaryOperatorClass:
121  case Stmt::OffsetOfExprClass:
122  case Stmt::UnaryExprOrTypeTraitExprClass:
123  case Stmt::ArraySubscriptExprClass:
124  case Stmt::BinaryOperatorClass:
125  case Stmt::CompoundAssignOperatorClass:
126  case Stmt::ConditionalOperatorClass:
127  case Stmt::BinaryConditionalOperatorClass:
128  case Stmt::ImplicitCastExprClass:
129  case Stmt::CStyleCastExprClass:
130  case Stmt::CompoundLiteralExprClass:
131  case Stmt::ExtVectorElementExprClass:
132  case Stmt::InitListExprClass:
133  case Stmt::DesignatedInitExprClass:
134  case Stmt::ImplicitValueInitExprClass:
135  case Stmt::ParenListExprClass:
136  case Stmt::VAArgExprClass:
137  case Stmt::AddrLabelExprClass:
138  case Stmt::StmtExprClass:
139  case Stmt::ChooseExprClass:
140  case Stmt::GenericSelectionExprClass:
141  case Stmt::GNUNullExprClass:
142  case Stmt::CXXStaticCastExprClass:
143  case Stmt::CXXDynamicCastExprClass:
144  case Stmt::CXXReinterpretCastExprClass:
145  case Stmt::CXXConstCastExprClass:
146  case Stmt::CXXFunctionalCastExprClass:
147  case Stmt::CXXTypeidExprClass:
148  case Stmt::CXXUuidofExprClass:
149  case Stmt::CXXBoolLiteralExprClass:
150  case Stmt::CXXNullPtrLiteralExprClass:
151  case Stmt::CXXThisExprClass:
152  case Stmt::CXXThrowExprClass:
153  case Stmt::CXXDefaultArgExprClass:
154  case Stmt::CXXScalarValueInitExprClass:
155  case Stmt::CXXNewExprClass:
156  case Stmt::CXXDeleteExprClass:
157  case Stmt::CXXPseudoDestructorExprClass:
158  case Stmt::UnresolvedLookupExprClass:
159  case Stmt::UnaryTypeTraitExprClass:
160  case Stmt::BinaryTypeTraitExprClass:
161  case Stmt::ArrayTypeTraitExprClass:
162  case Stmt::ExpressionTraitExprClass:
163  case Stmt::DependentScopeDeclRefExprClass:
164  case Stmt::CXXBindTemporaryExprClass:
165  case Stmt::ExprWithCleanupsClass:
166  case Stmt::CXXUnresolvedConstructExprClass:
167  case Stmt::CXXDependentScopeMemberExprClass:
168  case Stmt::UnresolvedMemberExprClass:
169  case Stmt::CXXNoexceptExprClass:
170  case Stmt::ObjCStringLiteralClass:
171  case Stmt::ObjCEncodeExprClass:
172  case Stmt::ObjCSelectorExprClass:
173  case Stmt::ObjCProtocolExprClass:
174  case Stmt::ObjCIsaExprClass:
175  case Stmt::ObjCIndirectCopyRestoreExprClass:
176  case Stmt::ObjCBridgedCastExprClass:
177  case Stmt::ShuffleVectorExprClass:
178  case Stmt::BlockExprClass:
179  case Stmt::OpaqueValueExprClass:
180  case Stmt::PackExpansionExprClass:
181  case Stmt::SizeOfPackExprClass:
182  case Stmt::AsTypeExprClass:
183    K = CXCursor_UnexposedExpr;
184    break;
185
186  case Stmt::DeclRefExprClass:
187  case Stmt::BlockDeclRefExprClass:
188  case Stmt::SubstNonTypeTemplateParmExprClass:
189  case Stmt::SubstNonTypeTemplateParmPackExprClass:
190    // FIXME: UnresolvedLookupExpr?
191    // FIXME: DependentScopeDeclRefExpr?
192    K = CXCursor_DeclRefExpr;
193    break;
194
195  case Stmt::MemberExprClass:
196  case Stmt::ObjCIvarRefExprClass:
197  case Stmt::ObjCPropertyRefExprClass:
198    // FIXME: UnresolvedMemberExpr?
199    // FIXME: CXXDependentScopeMemberExpr?
200    K = CXCursor_MemberRefExpr;
201    break;
202
203  case Stmt::CallExprClass:
204  case Stmt::CXXOperatorCallExprClass:
205  case Stmt::CXXMemberCallExprClass:
206  case Stmt::CUDAKernelCallExprClass:
207  case Stmt::CXXConstructExprClass:
208  case Stmt::CXXTemporaryObjectExprClass:
209    // FIXME: CXXUnresolvedConstructExpr
210    K = CXCursor_CallExpr;
211    break;
212
213  case Stmt::ObjCMessageExprClass:
214    K = CXCursor_ObjCMessageExpr;
215    break;
216  }
217
218  CXCursor C = { K, { Parent, S, TU } };
219  return C;
220}
221
222CXCursor cxcursor::MakeCursorObjCSuperClassRef(ObjCInterfaceDecl *Super,
223                                               SourceLocation Loc,
224                                               CXTranslationUnit TU) {
225  assert(Super && TU && "Invalid arguments!");
226  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
227  CXCursor C = { CXCursor_ObjCSuperClassRef, { Super, RawLoc, TU } };
228  return C;
229}
230
231std::pair<ObjCInterfaceDecl *, SourceLocation>
232cxcursor::getCursorObjCSuperClassRef(CXCursor C) {
233  assert(C.kind == CXCursor_ObjCSuperClassRef);
234  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
235           SourceLocation::getFromRawEncoding(
236                                      reinterpret_cast<uintptr_t>(C.data[1])));
237}
238
239CXCursor cxcursor::MakeCursorObjCProtocolRef(ObjCProtocolDecl *Super,
240                                             SourceLocation Loc,
241                                             CXTranslationUnit TU) {
242  assert(Super && TU && "Invalid arguments!");
243  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
244  CXCursor C = { CXCursor_ObjCProtocolRef, { Super, RawLoc, TU } };
245  return C;
246}
247
248std::pair<ObjCProtocolDecl *, SourceLocation>
249cxcursor::getCursorObjCProtocolRef(CXCursor C) {
250  assert(C.kind == CXCursor_ObjCProtocolRef);
251  return std::make_pair(static_cast<ObjCProtocolDecl *>(C.data[0]),
252           SourceLocation::getFromRawEncoding(
253                                      reinterpret_cast<uintptr_t>(C.data[1])));
254}
255
256CXCursor cxcursor::MakeCursorObjCClassRef(ObjCInterfaceDecl *Class,
257                                          SourceLocation Loc,
258                                          CXTranslationUnit TU) {
259  // 'Class' can be null for invalid code.
260  if (!Class)
261    return MakeCXCursorInvalid(CXCursor_InvalidCode);
262  assert(TU && "Invalid arguments!");
263  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
264  CXCursor C = { CXCursor_ObjCClassRef, { Class, RawLoc, TU } };
265  return C;
266}
267
268std::pair<ObjCInterfaceDecl *, SourceLocation>
269cxcursor::getCursorObjCClassRef(CXCursor C) {
270  assert(C.kind == CXCursor_ObjCClassRef);
271  return std::make_pair(static_cast<ObjCInterfaceDecl *>(C.data[0]),
272           SourceLocation::getFromRawEncoding(
273                                      reinterpret_cast<uintptr_t>(C.data[1])));
274}
275
276CXCursor cxcursor::MakeCursorTypeRef(TypeDecl *Type, SourceLocation Loc,
277                                     CXTranslationUnit TU) {
278  assert(Type && TU && "Invalid arguments!");
279  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
280  CXCursor C = { CXCursor_TypeRef, { Type, RawLoc, TU } };
281  return C;
282}
283
284std::pair<TypeDecl *, SourceLocation>
285cxcursor::getCursorTypeRef(CXCursor C) {
286  assert(C.kind == CXCursor_TypeRef);
287  return std::make_pair(static_cast<TypeDecl *>(C.data[0]),
288           SourceLocation::getFromRawEncoding(
289                                      reinterpret_cast<uintptr_t>(C.data[1])));
290}
291
292CXCursor cxcursor::MakeCursorTemplateRef(TemplateDecl *Template,
293                                         SourceLocation Loc,
294                                         CXTranslationUnit TU) {
295  assert(Template && TU && "Invalid arguments!");
296  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
297  CXCursor C = { CXCursor_TemplateRef, { Template, RawLoc, TU } };
298  return C;
299}
300
301std::pair<TemplateDecl *, SourceLocation>
302cxcursor::getCursorTemplateRef(CXCursor C) {
303  assert(C.kind == CXCursor_TemplateRef);
304  return std::make_pair(static_cast<TemplateDecl *>(C.data[0]),
305                        SourceLocation::getFromRawEncoding(
306                                       reinterpret_cast<uintptr_t>(C.data[1])));
307}
308
309CXCursor cxcursor::MakeCursorNamespaceRef(NamedDecl *NS, SourceLocation Loc,
310                                          CXTranslationUnit TU) {
311
312  assert(NS && (isa<NamespaceDecl>(NS) || isa<NamespaceAliasDecl>(NS)) && TU &&
313         "Invalid arguments!");
314  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
315  CXCursor C = { CXCursor_NamespaceRef, { NS, RawLoc, TU } };
316  return C;
317}
318
319std::pair<NamedDecl *, SourceLocation>
320cxcursor::getCursorNamespaceRef(CXCursor C) {
321  assert(C.kind == CXCursor_NamespaceRef);
322  return std::make_pair(static_cast<NamedDecl *>(C.data[0]),
323                        SourceLocation::getFromRawEncoding(
324                                       reinterpret_cast<uintptr_t>(C.data[1])));
325}
326
327CXCursor cxcursor::MakeCursorMemberRef(FieldDecl *Field, SourceLocation Loc,
328                                       CXTranslationUnit TU) {
329
330  assert(Field && TU && "Invalid arguments!");
331  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
332  CXCursor C = { CXCursor_MemberRef, { Field, RawLoc, TU } };
333  return C;
334}
335
336std::pair<FieldDecl *, SourceLocation>
337cxcursor::getCursorMemberRef(CXCursor C) {
338  assert(C.kind == CXCursor_MemberRef);
339  return std::make_pair(static_cast<FieldDecl *>(C.data[0]),
340                        SourceLocation::getFromRawEncoding(
341                                       reinterpret_cast<uintptr_t>(C.data[1])));
342}
343
344CXCursor cxcursor::MakeCursorCXXBaseSpecifier(CXXBaseSpecifier *B,
345                                              CXTranslationUnit TU){
346  CXCursor C = { CXCursor_CXXBaseSpecifier, { B, 0, TU } };
347  return C;
348}
349
350CXXBaseSpecifier *cxcursor::getCursorCXXBaseSpecifier(CXCursor C) {
351  assert(C.kind == CXCursor_CXXBaseSpecifier);
352  return static_cast<CXXBaseSpecifier*>(C.data[0]);
353}
354
355CXCursor cxcursor::MakePreprocessingDirectiveCursor(SourceRange Range,
356                                                    CXTranslationUnit TU) {
357  CXCursor C = { CXCursor_PreprocessingDirective,
358                 { reinterpret_cast<void *>(Range.getBegin().getRawEncoding()),
359                   reinterpret_cast<void *>(Range.getEnd().getRawEncoding()),
360                   TU }
361               };
362  return C;
363}
364
365SourceRange cxcursor::getCursorPreprocessingDirective(CXCursor C) {
366  assert(C.kind == CXCursor_PreprocessingDirective);
367  return SourceRange(SourceLocation::getFromRawEncoding(
368                                      reinterpret_cast<uintptr_t> (C.data[0])),
369                     SourceLocation::getFromRawEncoding(
370                                      reinterpret_cast<uintptr_t> (C.data[1])));
371}
372
373CXCursor cxcursor::MakeMacroDefinitionCursor(MacroDefinition *MI,
374                                             CXTranslationUnit TU) {
375  CXCursor C = { CXCursor_MacroDefinition, { MI, 0, TU } };
376  return C;
377}
378
379MacroDefinition *cxcursor::getCursorMacroDefinition(CXCursor C) {
380  assert(C.kind == CXCursor_MacroDefinition);
381  return static_cast<MacroDefinition *>(C.data[0]);
382}
383
384CXCursor cxcursor::MakeMacroExpansionCursor(MacroExpansion *MI,
385                                            CXTranslationUnit TU) {
386  CXCursor C = { CXCursor_MacroExpansion, { MI, 0, TU } };
387  return C;
388}
389
390MacroExpansion *cxcursor::getCursorMacroExpansion(CXCursor C) {
391  assert(C.kind == CXCursor_MacroExpansion);
392  return static_cast<MacroExpansion *>(C.data[0]);
393}
394
395CXCursor cxcursor::MakeInclusionDirectiveCursor(InclusionDirective *ID,
396                                                CXTranslationUnit TU) {
397  CXCursor C = { CXCursor_InclusionDirective, { ID, 0, TU } };
398  return C;
399}
400
401InclusionDirective *cxcursor::getCursorInclusionDirective(CXCursor C) {
402  assert(C.kind == CXCursor_InclusionDirective);
403  return static_cast<InclusionDirective *>(C.data[0]);
404}
405
406CXCursor cxcursor::MakeCursorLabelRef(LabelStmt *Label, SourceLocation Loc,
407                                      CXTranslationUnit TU) {
408
409  assert(Label && TU && "Invalid arguments!");
410  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
411  CXCursor C = { CXCursor_LabelRef, { Label, RawLoc, TU } };
412  return C;
413}
414
415std::pair<LabelStmt*, SourceLocation>
416cxcursor::getCursorLabelRef(CXCursor C) {
417  assert(C.kind == CXCursor_LabelRef);
418  return std::make_pair(static_cast<LabelStmt *>(C.data[0]),
419                        SourceLocation::getFromRawEncoding(
420                                       reinterpret_cast<uintptr_t>(C.data[1])));
421}
422
423CXCursor cxcursor::MakeCursorOverloadedDeclRef(OverloadExpr *E,
424                                               CXTranslationUnit TU) {
425  assert(E && TU && "Invalid arguments!");
426  OverloadedDeclRefStorage Storage(E);
427  void *RawLoc = reinterpret_cast<void *>(E->getNameLoc().getRawEncoding());
428  CXCursor C = {
429                 CXCursor_OverloadedDeclRef,
430                 { Storage.getOpaqueValue(), RawLoc, TU }
431               };
432  return C;
433}
434
435CXCursor cxcursor::MakeCursorOverloadedDeclRef(Decl *D,
436                                               SourceLocation Loc,
437                                               CXTranslationUnit TU) {
438  assert(D && TU && "Invalid arguments!");
439  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
440  OverloadedDeclRefStorage Storage(D);
441  CXCursor C = {
442    CXCursor_OverloadedDeclRef,
443    { Storage.getOpaqueValue(), RawLoc, TU }
444  };
445  return C;
446}
447
448CXCursor cxcursor::MakeCursorOverloadedDeclRef(TemplateName Name,
449                                               SourceLocation Loc,
450                                               CXTranslationUnit TU) {
451  assert(Name.getAsOverloadedTemplate() && TU && "Invalid arguments!");
452  void *RawLoc = reinterpret_cast<void *>(Loc.getRawEncoding());
453  OverloadedDeclRefStorage Storage(Name.getAsOverloadedTemplate());
454  CXCursor C = {
455    CXCursor_OverloadedDeclRef,
456    { Storage.getOpaqueValue(), RawLoc, TU }
457  };
458  return C;
459}
460
461std::pair<cxcursor::OverloadedDeclRefStorage, SourceLocation>
462cxcursor::getCursorOverloadedDeclRef(CXCursor C) {
463  assert(C.kind == CXCursor_OverloadedDeclRef);
464  return std::make_pair(OverloadedDeclRefStorage::getFromOpaqueValue(C.data[0]),
465                        SourceLocation::getFromRawEncoding(
466                                       reinterpret_cast<uintptr_t>(C.data[1])));
467}
468
469Decl *cxcursor::getCursorDecl(CXCursor Cursor) {
470  return (Decl *)Cursor.data[0];
471}
472
473Expr *cxcursor::getCursorExpr(CXCursor Cursor) {
474  return dyn_cast_or_null<Expr>(getCursorStmt(Cursor));
475}
476
477Stmt *cxcursor::getCursorStmt(CXCursor Cursor) {
478  if (Cursor.kind == CXCursor_ObjCSuperClassRef ||
479      Cursor.kind == CXCursor_ObjCProtocolRef ||
480      Cursor.kind == CXCursor_ObjCClassRef)
481    return 0;
482
483  return (Stmt *)Cursor.data[1];
484}
485
486Attr *cxcursor::getCursorAttr(CXCursor Cursor) {
487  return (Attr *)Cursor.data[1];
488}
489
490Decl *cxcursor::getCursorParentDecl(CXCursor Cursor) {
491  return (Decl *)Cursor.data[0];
492}
493
494ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {
495  return getCursorASTUnit(Cursor)->getASTContext();
496}
497
498ASTUnit *cxcursor::getCursorASTUnit(CXCursor Cursor) {
499  return static_cast<ASTUnit *>(static_cast<CXTranslationUnit>(Cursor.data[2])
500                                  ->TUData);
501}
502
503CXTranslationUnit cxcursor::getCursorTU(CXCursor Cursor) {
504  return static_cast<CXTranslationUnit>(Cursor.data[2]);
505}
506
507bool cxcursor::operator==(CXCursor X, CXCursor Y) {
508  return X.kind == Y.kind && X.data[0] == Y.data[0] && X.data[1] == Y.data[1] &&
509         X.data[2] == Y.data[2];
510}
511
512// FIXME: Remove once we can model DeclGroups and their appropriate ranges
513// properly in the ASTs.
514bool cxcursor::isFirstInDeclGroup(CXCursor C) {
515  assert(clang_isDeclaration(C.kind));
516  return ((uintptr_t) (C.data[1])) != 0;
517}
518
519//===----------------------------------------------------------------------===//
520// CXCursorSet.
521//===----------------------------------------------------------------------===//
522
523typedef llvm::DenseMap<CXCursor, unsigned> CXCursorSet_Impl;
524
525static inline CXCursorSet packCXCursorSet(CXCursorSet_Impl *setImpl) {
526  return (CXCursorSet) setImpl;
527}
528static inline CXCursorSet_Impl *unpackCXCursorSet(CXCursorSet set) {
529  return (CXCursorSet_Impl*) set;
530}
531namespace llvm {
532template<> struct DenseMapInfo<CXCursor> {
533public:
534  static inline CXCursor getEmptyKey() {
535    return MakeCXCursorInvalid(CXCursor_InvalidFile);
536  }
537  static inline CXCursor getTombstoneKey() {
538    return MakeCXCursorInvalid(CXCursor_NoDeclFound);
539  }
540  static inline unsigned getHashValue(const CXCursor &cursor) {
541    return llvm::DenseMapInfo<std::pair<void*,void*> >
542      ::getHashValue(std::make_pair(cursor.data[0], cursor.data[1]));
543  }
544  static inline bool isEqual(const CXCursor &x, const CXCursor &y) {
545    return x.kind == y.kind &&
546           x.data[0] == y.data[0] &&
547           x.data[1] == y.data[1];
548  }
549};
550}
551
552extern "C" {
553CXCursorSet clang_createCXCursorSet() {
554  return packCXCursorSet(new CXCursorSet_Impl());
555}
556
557void clang_disposeCXCursorSet(CXCursorSet set) {
558  delete unpackCXCursorSet(set);
559}
560
561unsigned clang_CXCursorSet_contains(CXCursorSet set, CXCursor cursor) {
562  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
563  if (!setImpl)
564    return 0;
565  return setImpl->find(cursor) == setImpl->end();
566}
567
568unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {
569  // Do not insert invalid cursors into the set.
570  if (cursor.kind >= CXCursor_FirstInvalid &&
571      cursor.kind <= CXCursor_LastInvalid)
572    return 1;
573
574  CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
575  if (!setImpl)
576    return 1;
577  unsigned &entry = (*setImpl)[cursor];
578  unsigned flag = entry == 0 ? 1 : 0;
579  entry = 1;
580  return flag;
581}
582
583CXCompletionString clang_getCursorCompletionString(CXCursor cursor) {
584  enum CXCursorKind kind = clang_getCursorKind(cursor);
585  if (clang_isDeclaration(kind)) {
586    Decl *decl = getCursorDecl(cursor);
587    if (isa<NamedDecl>(decl)) {
588      NamedDecl *namedDecl = (NamedDecl *)decl;
589      ASTUnit *unit = getCursorASTUnit(cursor);
590      if (unit->hasSema()) {
591        Sema &S = unit->getSema();
592        CodeCompletionAllocator *Allocator
593          = unit->getCursorCompletionAllocator().getPtr();
594        CodeCompletionResult Result(namedDecl);
595        CodeCompletionString *String
596          = Result.CreateCodeCompletionString(S, *Allocator);
597        return String;
598      }
599    }
600  }
601  else if (kind == CXCursor_MacroDefinition) {
602    MacroDefinition *definition = getCursorMacroDefinition(cursor);
603    const IdentifierInfo *MacroInfo = definition->getName();
604    ASTUnit *unit = getCursorASTUnit(cursor);
605    if (unit->hasSema()) {
606      Sema &S = unit->getSema();
607      CodeCompletionAllocator *Allocator
608        = unit->getCursorCompletionAllocator().getPtr();
609      CodeCompletionResult Result(const_cast<IdentifierInfo *>(MacroInfo));
610      CodeCompletionString *String
611        = Result.CreateCodeCompletionString(S, *Allocator);
612      return String;
613    }
614  }
615  return NULL;
616}
617
618} // end: extern "C"
619