CIndex.cpp revision c373e3c8448ddce58a9a0eff62b1b89513b1d9ee 
1//===- CIndex.cpp - Clang-C Source Indexing Library -----------------------===//
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 implements the main API hooks in the Clang-C Source Indexing
11// library.
12//
13//===----------------------------------------------------------------------===//
14
15#include "CIndexer.h"
16#include "CXCursor.h"
17#include "CXType.h"
18#include "CXSourceLocation.h"
19#include "CIndexDiagnostic.h"
20
21#include "clang/Basic/Version.h"
22
23#include "clang/AST/DeclVisitor.h"
24#include "clang/AST/StmtVisitor.h"
25#include "clang/AST/TypeLocVisitor.h"
26#include "clang/Basic/Diagnostic.h"
27#include "clang/Frontend/ASTUnit.h"
28#include "clang/Frontend/CompilerInstance.h"
29#include "clang/Frontend/FrontendDiagnostic.h"
30#include "clang/Lex/Lexer.h"
31#include "clang/Lex/PreprocessingRecord.h"
32#include "clang/Lex/Preprocessor.h"
33#include "llvm/ADT/STLExtras.h"
34#include "llvm/ADT/Optional.h"
35#include "clang/Analysis/Support/SaveAndRestore.h"
36#include "llvm/Support/CrashRecoveryContext.h"
37#include "llvm/Support/PrettyStackTrace.h"
38#include "llvm/Support/MemoryBuffer.h"
39#include "llvm/Support/raw_ostream.h"
40#include "llvm/Support/Timer.h"
41#include "llvm/System/Mutex.h"
42#include "llvm/System/Program.h"
43#include "llvm/System/Signals.h"
44#include "llvm/System/Threading.h"
45
46// Needed to define L_TMPNAM on some systems.
47#include <cstdio>
48
49using namespace clang;
50using namespace clang::cxcursor;
51using namespace clang::cxstring;
52
53/// \brief The result of comparing two source ranges.
54enum RangeComparisonResult {
55  /// \brief Either the ranges overlap or one of the ranges is invalid.
56  RangeOverlap,
57
58  /// \brief The first range ends before the second range starts.
59  RangeBefore,
60
61  /// \brief The first range starts after the second range ends.
62  RangeAfter
63};
64
65/// \brief Compare two source ranges to determine their relative position in
66/// the translation unit.
67static RangeComparisonResult RangeCompare(SourceManager &SM,
68                                          SourceRange R1,
69                                          SourceRange R2) {
70  assert(R1.isValid() && "First range is invalid?");
71  assert(R2.isValid() && "Second range is invalid?");
72  if (R1.getEnd() != R2.getBegin() &&
73      SM.isBeforeInTranslationUnit(R1.getEnd(), R2.getBegin()))
74    return RangeBefore;
75  if (R2.getEnd() != R1.getBegin() &&
76      SM.isBeforeInTranslationUnit(R2.getEnd(), R1.getBegin()))
77    return RangeAfter;
78  return RangeOverlap;
79}
80
81/// \brief Determine if a source location falls within, before, or after a
82///   a given source range.
83static RangeComparisonResult LocationCompare(SourceManager &SM,
84                                             SourceLocation L, SourceRange R) {
85  assert(R.isValid() && "First range is invalid?");
86  assert(L.isValid() && "Second range is invalid?");
87  if (L == R.getBegin() || L == R.getEnd())
88    return RangeOverlap;
89  if (SM.isBeforeInTranslationUnit(L, R.getBegin()))
90    return RangeBefore;
91  if (SM.isBeforeInTranslationUnit(R.getEnd(), L))
92    return RangeAfter;
93  return RangeOverlap;
94}
95
96/// \brief Translate a Clang source range into a CIndex source range.
97///
98/// Clang internally represents ranges where the end location points to the
99/// start of the token at the end. However, for external clients it is more
100/// useful to have a CXSourceRange be a proper half-open interval. This routine
101/// does the appropriate translation.
102CXSourceRange cxloc::translateSourceRange(const SourceManager &SM,
103                                          const LangOptions &LangOpts,
104                                          const CharSourceRange &R) {
105  // We want the last character in this location, so we will adjust the
106  // location accordingly.
107  SourceLocation EndLoc = R.getEnd();
108  if (EndLoc.isValid() && EndLoc.isMacroID())
109    EndLoc = SM.getSpellingLoc(EndLoc);
110  if (R.isTokenRange() && !EndLoc.isInvalid() && EndLoc.isFileID()) {
111    unsigned Length = Lexer::MeasureTokenLength(EndLoc, SM, LangOpts);
112    EndLoc = EndLoc.getFileLocWithOffset(Length);
113  }
114
115  CXSourceRange Result = { { (void *)&SM, (void *)&LangOpts },
116                           R.getBegin().getRawEncoding(),
117                           EndLoc.getRawEncoding() };
118  return Result;
119}
120
121//===----------------------------------------------------------------------===//
122// Cursor visitor.
123//===----------------------------------------------------------------------===//
124
125namespace {
126
127class VisitorJob {
128public:
129  enum Kind { DeclVisitKind, StmtVisitKind, MemberExprPartsKind,
130              TypeLocVisitKind, OverloadExprPartsKind };
131protected:
132  void *dataA;
133  void *dataB;
134  CXCursor parent;
135  Kind K;
136  VisitorJob(CXCursor C, Kind k, void *d1, void *d2 = 0)
137    : dataA(d1), dataB(d2), parent(C), K(k) {}
138public:
139  Kind getKind() const { return K; }
140  const CXCursor &getParent() const { return parent; }
141  static bool classof(VisitorJob *VJ) { return true; }
142};
143
144typedef llvm::SmallVector<VisitorJob, 10> VisitorWorkList;
145
146#define DEF_JOB(NAME, DATA, KIND)\
147class NAME : public VisitorJob {\
148public:\
149  NAME(DATA *d, CXCursor parent) : VisitorJob(parent, VisitorJob::KIND, d) {} \
150  static bool classof(const VisitorJob *VJ) { return VJ->getKind() == KIND; }\
151  DATA *get() const { return static_cast<DATA*>(dataA); }\
152};
153
154DEF_JOB(DeclVisit, Decl, DeclVisitKind)
155DEF_JOB(StmtVisit, Stmt, StmtVisitKind)
156DEF_JOB(MemberExprParts, MemberExpr, MemberExprPartsKind)
157DEF_JOB(OverloadExprParts, OverloadExpr, OverloadExprPartsKind)
158#undef DEF_JOB
159
160class TypeLocVisit : public VisitorJob {
161public:
162  TypeLocVisit(TypeLoc tl, CXCursor parent) :
163    VisitorJob(parent, VisitorJob::TypeLocVisitKind,
164               tl.getType().getAsOpaquePtr(), tl.getOpaqueData()) {}
165
166  static bool classof(const VisitorJob *VJ) {
167    return VJ->getKind() == TypeLocVisitKind;
168  }
169
170  TypeLoc get() {
171    QualType T = QualType::getFromOpaquePtr(dataA);
172    return TypeLoc(T, dataB);
173  }
174};
175
176static inline void WLAddStmt(VisitorWorkList &WL, CXCursor Parent, Stmt *S) {
177  if (S)
178    WL.push_back(StmtVisit(S, Parent));
179}
180static inline void WLAddDecl(VisitorWorkList &WL, CXCursor Parent, Decl *D) {
181  if (D)
182    WL.push_back(DeclVisit(D, Parent));
183}
184static inline void WLAddTypeLoc(VisitorWorkList &WL, CXCursor Parent,
185                                TypeSourceInfo *TI) {
186  if (TI)
187    WL.push_back(TypeLocVisit(TI->getTypeLoc(), Parent));
188}
189
190// Cursor visitor.
191class CursorVisitor : public DeclVisitor<CursorVisitor, bool>,
192                      public TypeLocVisitor<CursorVisitor, bool>,
193                      public StmtVisitor<CursorVisitor, bool>
194{
195  /// \brief The translation unit we are traversing.
196  ASTUnit *TU;
197
198  /// \brief The parent cursor whose children we are traversing.
199  CXCursor Parent;
200
201  /// \brief The declaration that serves at the parent of any statement or
202  /// expression nodes.
203  Decl *StmtParent;
204
205  /// \brief The visitor function.
206  CXCursorVisitor Visitor;
207
208  /// \brief The opaque client data, to be passed along to the visitor.
209  CXClientData ClientData;
210
211  // MaxPCHLevel - the maximum PCH level of declarations that we will pass on
212  // to the visitor. Declarations with a PCH level greater than this value will
213  // be suppressed.
214  unsigned MaxPCHLevel;
215
216  /// \brief When valid, a source range to which the cursor should restrict
217  /// its search.
218  SourceRange RegionOfInterest;
219
220  // FIXME: Eventually remove.  This part of a hack to support proper
221  // iteration over all Decls contained lexically within an ObjC container.
222  DeclContext::decl_iterator *DI_current;
223  DeclContext::decl_iterator DE_current;
224
225  using DeclVisitor<CursorVisitor, bool>::Visit;
226  using TypeLocVisitor<CursorVisitor, bool>::Visit;
227  using StmtVisitor<CursorVisitor, bool>::Visit;
228
229  /// \brief Determine whether this particular source range comes before, comes
230  /// after, or overlaps the region of interest.
231  ///
232  /// \param R a half-open source range retrieved from the abstract syntax tree.
233  RangeComparisonResult CompareRegionOfInterest(SourceRange R);
234
235  class SetParentRAII {
236    CXCursor &Parent;
237    Decl *&StmtParent;
238    CXCursor OldParent;
239
240  public:
241    SetParentRAII(CXCursor &Parent, Decl *&StmtParent, CXCursor NewParent)
242      : Parent(Parent), StmtParent(StmtParent), OldParent(Parent)
243    {
244      Parent = NewParent;
245      if (clang_isDeclaration(Parent.kind))
246        StmtParent = getCursorDecl(Parent);
247    }
248
249    ~SetParentRAII() {
250      Parent = OldParent;
251      if (clang_isDeclaration(Parent.kind))
252        StmtParent = getCursorDecl(Parent);
253    }
254  };
255
256public:
257  CursorVisitor(ASTUnit *TU, CXCursorVisitor Visitor, CXClientData ClientData,
258                unsigned MaxPCHLevel,
259                SourceRange RegionOfInterest = SourceRange())
260    : TU(TU), Visitor(Visitor), ClientData(ClientData),
261      MaxPCHLevel(MaxPCHLevel), RegionOfInterest(RegionOfInterest),
262      DI_current(0)
263  {
264    Parent.kind = CXCursor_NoDeclFound;
265    Parent.data[0] = 0;
266    Parent.data[1] = 0;
267    Parent.data[2] = 0;
268    StmtParent = 0;
269  }
270
271  ASTUnit *getASTUnit() const { return TU; }
272
273  bool Visit(CXCursor Cursor, bool CheckedRegionOfInterest = false);
274
275  std::pair<PreprocessingRecord::iterator, PreprocessingRecord::iterator>
276    getPreprocessedEntities();
277
278  bool VisitChildren(CXCursor Parent);
279
280  // Declaration visitors
281  bool VisitAttributes(Decl *D);
282  bool VisitBlockDecl(BlockDecl *B);
283  bool VisitCXXRecordDecl(CXXRecordDecl *D);
284  llvm::Optional<bool> shouldVisitCursor(CXCursor C);
285  bool VisitDeclContext(DeclContext *DC);
286  bool VisitTranslationUnitDecl(TranslationUnitDecl *D);
287  bool VisitTypedefDecl(TypedefDecl *D);
288  bool VisitTagDecl(TagDecl *D);
289  bool VisitClassTemplateSpecializationDecl(ClassTemplateSpecializationDecl *D);
290  bool VisitClassTemplatePartialSpecializationDecl(
291                                     ClassTemplatePartialSpecializationDecl *D);
292  bool VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D);
293  bool VisitEnumConstantDecl(EnumConstantDecl *D);
294  bool VisitDeclaratorDecl(DeclaratorDecl *DD);
295  bool VisitFunctionDecl(FunctionDecl *ND);
296  bool VisitFieldDecl(FieldDecl *D);
297  bool VisitVarDecl(VarDecl *);
298  bool VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D);
299  bool VisitFunctionTemplateDecl(FunctionTemplateDecl *D);
300  bool VisitClassTemplateDecl(ClassTemplateDecl *D);
301  bool VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D);
302  bool VisitObjCMethodDecl(ObjCMethodDecl *ND);
303  bool VisitObjCContainerDecl(ObjCContainerDecl *D);
304  bool VisitObjCCategoryDecl(ObjCCategoryDecl *ND);
305  bool VisitObjCProtocolDecl(ObjCProtocolDecl *PID);
306  bool VisitObjCPropertyDecl(ObjCPropertyDecl *PD);
307  bool VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
308  bool VisitObjCImplDecl(ObjCImplDecl *D);
309  bool VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
310  bool VisitObjCImplementationDecl(ObjCImplementationDecl *D);
311  // FIXME: ObjCCompatibleAliasDecl requires aliased-class locations.
312  bool VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D);
313  bool VisitObjCClassDecl(ObjCClassDecl *D);
314  bool VisitLinkageSpecDecl(LinkageSpecDecl *D);
315  bool VisitNamespaceDecl(NamespaceDecl *D);
316  bool VisitNamespaceAliasDecl(NamespaceAliasDecl *D);
317  bool VisitUsingDirectiveDecl(UsingDirectiveDecl *D);
318  bool VisitUsingDecl(UsingDecl *D);
319  bool VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D);
320  bool VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
321
322  // Name visitor
323  bool VisitDeclarationNameInfo(DeclarationNameInfo Name);
324  bool VisitNestedNameSpecifier(NestedNameSpecifier *NNS, SourceRange Range);
325
326  // Template visitors
327  bool VisitTemplateParameters(const TemplateParameterList *Params);
328  bool VisitTemplateName(TemplateName Name, SourceLocation Loc);
329  bool VisitTemplateArgumentLoc(const TemplateArgumentLoc &TAL);
330
331  // Type visitors
332  bool VisitQualifiedTypeLoc(QualifiedTypeLoc TL);
333  bool VisitBuiltinTypeLoc(BuiltinTypeLoc TL);
334  bool VisitTypedefTypeLoc(TypedefTypeLoc TL);
335  bool VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL);
336  bool VisitTagTypeLoc(TagTypeLoc TL);
337  bool VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL);
338  bool VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL);
339  bool VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL);
340  bool VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL);
341  bool VisitPointerTypeLoc(PointerTypeLoc TL);
342  bool VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL);
343  bool VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL);
344  bool VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL);
345  bool VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL);
346  bool VisitFunctionTypeLoc(FunctionTypeLoc TL, bool SkipResultType = false);
347  bool VisitArrayTypeLoc(ArrayTypeLoc TL);
348  bool VisitTemplateSpecializationTypeLoc(TemplateSpecializationTypeLoc TL);
349  // FIXME: Implement visitors here when the unimplemented TypeLocs get
350  // implemented
351  bool VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL);
352  bool VisitTypeOfTypeLoc(TypeOfTypeLoc TL);
353
354  // Statement visitors
355  bool VisitStmt(Stmt *S);
356  bool VisitDeclStmt(DeclStmt *S);
357  bool VisitGotoStmt(GotoStmt *S);
358
359  // Expression visitors
360  bool VisitDeclRefExpr(DeclRefExpr *E);
361  bool VisitBlockExpr(BlockExpr *B);
362  bool VisitExplicitCastExpr(ExplicitCastExpr *E);
363  bool VisitObjCEncodeExpr(ObjCEncodeExpr *E);
364  bool VisitOffsetOfExpr(OffsetOfExpr *E);
365  bool VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E);
366  bool VisitAddrLabelExpr(AddrLabelExpr *E);
367  bool VisitTypesCompatibleExpr(TypesCompatibleExpr *E);
368  bool VisitVAArgExpr(VAArgExpr *E);
369  bool VisitDesignatedInitExpr(DesignatedInitExpr *E);
370  bool VisitCXXTypeidExpr(CXXTypeidExpr *E);
371  bool VisitCXXUuidofExpr(CXXUuidofExpr *E);
372  bool VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) { return false; }
373  bool VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E);
374  bool VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E);
375  bool VisitCXXNewExpr(CXXNewExpr *E);
376  bool VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E);
377  bool VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E);
378  bool VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E);
379  bool VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E);
380  bool VisitCXXDependentScopeMemberExpr(CXXDependentScopeMemberExpr *E);
381
382#define DATA_RECURSIVE_VISIT(NAME)\
383bool Visit##NAME(NAME *S) { return VisitDataRecursive(S); }
384  DATA_RECURSIVE_VISIT(BinaryOperator)
385  DATA_RECURSIVE_VISIT(CompoundLiteralExpr)
386  DATA_RECURSIVE_VISIT(CXXMemberCallExpr)
387  DATA_RECURSIVE_VISIT(CXXOperatorCallExpr)
388  DATA_RECURSIVE_VISIT(DoStmt)
389  DATA_RECURSIVE_VISIT(IfStmt)
390  DATA_RECURSIVE_VISIT(InitListExpr)
391  DATA_RECURSIVE_VISIT(ForStmt)
392  DATA_RECURSIVE_VISIT(MemberExpr)
393  DATA_RECURSIVE_VISIT(ObjCMessageExpr)
394  DATA_RECURSIVE_VISIT(OverloadExpr)
395  DATA_RECURSIVE_VISIT(SwitchStmt)
396  DATA_RECURSIVE_VISIT(WhileStmt)
397  DATA_RECURSIVE_VISIT(UnresolvedMemberExpr)
398
399  // Data-recursive visitor functions.
400  bool IsInRegionOfInterest(CXCursor C);
401  bool RunVisitorWorkList(VisitorWorkList &WL);
402  void EnqueueWorkList(VisitorWorkList &WL, Stmt *S);
403  bool VisitDataRecursive(Stmt *S);
404};
405
406} // end anonymous namespace
407
408static SourceRange getRawCursorExtent(CXCursor C);
409
410RangeComparisonResult CursorVisitor::CompareRegionOfInterest(SourceRange R) {
411  return RangeCompare(TU->getSourceManager(), R, RegionOfInterest);
412}
413
414/// \brief Visit the given cursor and, if requested by the visitor,
415/// its children.
416///
417/// \param Cursor the cursor to visit.
418///
419/// \param CheckRegionOfInterest if true, then the caller already checked that
420/// this cursor is within the region of interest.
421///
422/// \returns true if the visitation should be aborted, false if it
423/// should continue.
424bool CursorVisitor::Visit(CXCursor Cursor, bool CheckedRegionOfInterest) {
425  if (clang_isInvalid(Cursor.kind))
426    return false;
427
428  if (clang_isDeclaration(Cursor.kind)) {
429    Decl *D = getCursorDecl(Cursor);
430    assert(D && "Invalid declaration cursor");
431    if (D->getPCHLevel() > MaxPCHLevel)
432      return false;
433
434    if (D->isImplicit())
435      return false;
436  }
437
438  // If we have a range of interest, and this cursor doesn't intersect with it,
439  // we're done.
440  if (RegionOfInterest.isValid() && !CheckedRegionOfInterest) {
441    SourceRange Range = getRawCursorExtent(Cursor);
442    if (Range.isInvalid() || CompareRegionOfInterest(Range))
443      return false;
444  }
445
446  switch (Visitor(Cursor, Parent, ClientData)) {
447  case CXChildVisit_Break:
448    return true;
449
450  case CXChildVisit_Continue:
451    return false;
452
453  case CXChildVisit_Recurse:
454    return VisitChildren(Cursor);
455  }
456
457  return false;
458}
459
460std::pair<PreprocessingRecord::iterator, PreprocessingRecord::iterator>
461CursorVisitor::getPreprocessedEntities() {
462  PreprocessingRecord &PPRec
463    = *TU->getPreprocessor().getPreprocessingRecord();
464
465  bool OnlyLocalDecls
466    = !TU->isMainFileAST() && TU->getOnlyLocalDecls();
467
468  // There is no region of interest; we have to walk everything.
469  if (RegionOfInterest.isInvalid())
470    return std::make_pair(PPRec.begin(OnlyLocalDecls),
471                          PPRec.end(OnlyLocalDecls));
472
473  // Find the file in which the region of interest lands.
474  SourceManager &SM = TU->getSourceManager();
475  std::pair<FileID, unsigned> Begin
476    = SM.getDecomposedInstantiationLoc(RegionOfInterest.getBegin());
477  std::pair<FileID, unsigned> End
478    = SM.getDecomposedInstantiationLoc(RegionOfInterest.getEnd());
479
480  // The region of interest spans files; we have to walk everything.
481  if (Begin.first != End.first)
482    return std::make_pair(PPRec.begin(OnlyLocalDecls),
483                          PPRec.end(OnlyLocalDecls));
484
485  ASTUnit::PreprocessedEntitiesByFileMap &ByFileMap
486    = TU->getPreprocessedEntitiesByFile();
487  if (ByFileMap.empty()) {
488    // Build the mapping from files to sets of preprocessed entities.
489    for (PreprocessingRecord::iterator E = PPRec.begin(OnlyLocalDecls),
490                                    EEnd = PPRec.end(OnlyLocalDecls);
491         E != EEnd; ++E) {
492      std::pair<FileID, unsigned> P
493        = SM.getDecomposedInstantiationLoc((*E)->getSourceRange().getBegin());
494      ByFileMap[P.first].push_back(*E);
495    }
496  }
497
498  return std::make_pair(ByFileMap[Begin.first].begin(),
499                        ByFileMap[Begin.first].end());
500}
501
502/// \brief Visit the children of the given cursor.
503///
504/// \returns true if the visitation should be aborted, false if it
505/// should continue.
506bool CursorVisitor::VisitChildren(CXCursor Cursor) {
507  if (clang_isReference(Cursor.kind)) {
508    // By definition, references have no children.
509    return false;
510  }
511
512  // Set the Parent field to Cursor, then back to its old value once we're
513  // done.
514  SetParentRAII SetParent(Parent, StmtParent, Cursor);
515
516  if (clang_isDeclaration(Cursor.kind)) {
517    Decl *D = getCursorDecl(Cursor);
518    assert(D && "Invalid declaration cursor");
519    return VisitAttributes(D) || Visit(D);
520  }
521
522  if (clang_isStatement(Cursor.kind))
523    return Visit(getCursorStmt(Cursor));
524  if (clang_isExpression(Cursor.kind))
525    return Visit(getCursorExpr(Cursor));
526
527  if (clang_isTranslationUnit(Cursor.kind)) {
528    ASTUnit *CXXUnit = getCursorASTUnit(Cursor);
529    if (!CXXUnit->isMainFileAST() && CXXUnit->getOnlyLocalDecls() &&
530        RegionOfInterest.isInvalid()) {
531      for (ASTUnit::top_level_iterator TL = CXXUnit->top_level_begin(),
532                                    TLEnd = CXXUnit->top_level_end();
533           TL != TLEnd; ++TL) {
534        if (Visit(MakeCXCursor(*TL, CXXUnit), true))
535          return true;
536      }
537    } else if (VisitDeclContext(
538                            CXXUnit->getASTContext().getTranslationUnitDecl()))
539      return true;
540
541    // Walk the preprocessing record.
542    if (CXXUnit->getPreprocessor().getPreprocessingRecord()) {
543      // FIXME: Once we have the ability to deserialize a preprocessing record,
544      // do so.
545      PreprocessingRecord::iterator E, EEnd;
546      for (llvm::tie(E, EEnd) = getPreprocessedEntities(); E != EEnd; ++E) {
547        if (MacroInstantiation *MI = dyn_cast<MacroInstantiation>(*E)) {
548          if (Visit(MakeMacroInstantiationCursor(MI, CXXUnit)))
549            return true;
550
551          continue;
552        }
553
554        if (MacroDefinition *MD = dyn_cast<MacroDefinition>(*E)) {
555          if (Visit(MakeMacroDefinitionCursor(MD, CXXUnit)))
556            return true;
557
558          continue;
559        }
560
561        if (InclusionDirective *ID = dyn_cast<InclusionDirective>(*E)) {
562          if (Visit(MakeInclusionDirectiveCursor(ID, CXXUnit)))
563            return true;
564
565          continue;
566        }
567      }
568    }
569    return false;
570  }
571
572  // Nothing to visit at the moment.
573  return false;
574}
575
576bool CursorVisitor::VisitBlockDecl(BlockDecl *B) {
577  if (Visit(B->getSignatureAsWritten()->getTypeLoc()))
578    return true;
579
580  if (Stmt *Body = B->getBody())
581    return Visit(MakeCXCursor(Body, StmtParent, TU));
582
583  return false;
584}
585
586llvm::Optional<bool> CursorVisitor::shouldVisitCursor(CXCursor Cursor) {
587  if (RegionOfInterest.isValid()) {
588    SourceRange Range = getRawCursorExtent(Cursor);
589    if (Range.isInvalid())
590      return llvm::Optional<bool>();
591
592    switch (CompareRegionOfInterest(Range)) {
593    case RangeBefore:
594      // This declaration comes before the region of interest; skip it.
595      return llvm::Optional<bool>();
596
597    case RangeAfter:
598      // This declaration comes after the region of interest; we're done.
599      return false;
600
601    case RangeOverlap:
602      // This declaration overlaps the region of interest; visit it.
603      break;
604    }
605  }
606  return true;
607}
608
609bool CursorVisitor::VisitDeclContext(DeclContext *DC) {
610  DeclContext::decl_iterator I = DC->decls_begin(), E = DC->decls_end();
611
612  // FIXME: Eventually remove.  This part of a hack to support proper
613  // iteration over all Decls contained lexically within an ObjC container.
614  SaveAndRestore<DeclContext::decl_iterator*> DI_saved(DI_current, &I);
615  SaveAndRestore<DeclContext::decl_iterator> DE_saved(DE_current, E);
616
617  for ( ; I != E; ++I) {
618    Decl *D = *I;
619    if (D->getLexicalDeclContext() != DC)
620      continue;
621    CXCursor Cursor = MakeCXCursor(D, TU);
622    const llvm::Optional<bool> &V = shouldVisitCursor(Cursor);
623    if (!V.hasValue())
624      continue;
625    if (!V.getValue())
626      return false;
627    if (Visit(Cursor, true))
628      return true;
629  }
630  return false;
631}
632
633bool CursorVisitor::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
634  llvm_unreachable("Translation units are visited directly by Visit()");
635  return false;
636}
637
638bool CursorVisitor::VisitTypedefDecl(TypedefDecl *D) {
639  if (TypeSourceInfo *TSInfo = D->getTypeSourceInfo())
640    return Visit(TSInfo->getTypeLoc());
641
642  return false;
643}
644
645bool CursorVisitor::VisitTagDecl(TagDecl *D) {
646  return VisitDeclContext(D);
647}
648
649bool CursorVisitor::VisitClassTemplateSpecializationDecl(
650                                          ClassTemplateSpecializationDecl *D) {
651  bool ShouldVisitBody = false;
652  switch (D->getSpecializationKind()) {
653  case TSK_Undeclared:
654  case TSK_ImplicitInstantiation:
655    // Nothing to visit
656    return false;
657
658  case TSK_ExplicitInstantiationDeclaration:
659  case TSK_ExplicitInstantiationDefinition:
660    break;
661
662  case TSK_ExplicitSpecialization:
663    ShouldVisitBody = true;
664    break;
665  }
666
667  // Visit the template arguments used in the specialization.
668  if (TypeSourceInfo *SpecType = D->getTypeAsWritten()) {
669    TypeLoc TL = SpecType->getTypeLoc();
670    if (TemplateSpecializationTypeLoc *TSTLoc
671          = dyn_cast<TemplateSpecializationTypeLoc>(&TL)) {
672      for (unsigned I = 0, N = TSTLoc->getNumArgs(); I != N; ++I)
673        if (VisitTemplateArgumentLoc(TSTLoc->getArgLoc(I)))
674          return true;
675    }
676  }
677
678  if (ShouldVisitBody && VisitCXXRecordDecl(D))
679    return true;
680
681  return false;
682}
683
684bool CursorVisitor::VisitClassTemplatePartialSpecializationDecl(
685                                   ClassTemplatePartialSpecializationDecl *D) {
686  // FIXME: Visit the "outer" template parameter lists on the TagDecl
687  // before visiting these template parameters.
688  if (VisitTemplateParameters(D->getTemplateParameters()))
689    return true;
690
691  // Visit the partial specialization arguments.
692  const TemplateArgumentLoc *TemplateArgs = D->getTemplateArgsAsWritten();
693  for (unsigned I = 0, N = D->getNumTemplateArgsAsWritten(); I != N; ++I)
694    if (VisitTemplateArgumentLoc(TemplateArgs[I]))
695      return true;
696
697  return VisitCXXRecordDecl(D);
698}
699
700bool CursorVisitor::VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
701  // Visit the default argument.
702  if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited())
703    if (TypeSourceInfo *DefArg = D->getDefaultArgumentInfo())
704      if (Visit(DefArg->getTypeLoc()))
705        return true;
706
707  return false;
708}
709
710bool CursorVisitor::VisitEnumConstantDecl(EnumConstantDecl *D) {
711  if (Expr *Init = D->getInitExpr())
712    return Visit(MakeCXCursor(Init, StmtParent, TU));
713  return false;
714}
715
716bool CursorVisitor::VisitDeclaratorDecl(DeclaratorDecl *DD) {
717  if (TypeSourceInfo *TSInfo = DD->getTypeSourceInfo())
718    if (Visit(TSInfo->getTypeLoc()))
719      return true;
720
721  return false;
722}
723
724/// \brief Compare two base or member initializers based on their source order.
725static int CompareCXXBaseOrMemberInitializers(const void* Xp, const void *Yp) {
726  CXXBaseOrMemberInitializer const * const *X
727    = static_cast<CXXBaseOrMemberInitializer const * const *>(Xp);
728  CXXBaseOrMemberInitializer const * const *Y
729    = static_cast<CXXBaseOrMemberInitializer const * const *>(Yp);
730
731  if ((*X)->getSourceOrder() < (*Y)->getSourceOrder())
732    return -1;
733  else if ((*X)->getSourceOrder() > (*Y)->getSourceOrder())
734    return 1;
735  else
736    return 0;
737}
738
739bool CursorVisitor::VisitFunctionDecl(FunctionDecl *ND) {
740  if (TypeSourceInfo *TSInfo = ND->getTypeSourceInfo()) {
741    // Visit the function declaration's syntactic components in the order
742    // written. This requires a bit of work.
743    TypeLoc TL = TSInfo->getTypeLoc();
744    FunctionTypeLoc *FTL = dyn_cast<FunctionTypeLoc>(&TL);
745
746    // If we have a function declared directly (without the use of a typedef),
747    // visit just the return type. Otherwise, just visit the function's type
748    // now.
749    if ((FTL && !isa<CXXConversionDecl>(ND) && Visit(FTL->getResultLoc())) ||
750        (!FTL && Visit(TL)))
751      return true;
752
753    // Visit the nested-name-specifier, if present.
754    if (NestedNameSpecifier *Qualifier = ND->getQualifier())
755      if (VisitNestedNameSpecifier(Qualifier, ND->getQualifierRange()))
756        return true;
757
758    // Visit the declaration name.
759    if (VisitDeclarationNameInfo(ND->getNameInfo()))
760      return true;
761
762    // FIXME: Visit explicitly-specified template arguments!
763
764    // Visit the function parameters, if we have a function type.
765    if (FTL && VisitFunctionTypeLoc(*FTL, true))
766      return true;
767
768    // FIXME: Attributes?
769  }
770
771  if (ND->isThisDeclarationADefinition()) {
772    if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(ND)) {
773      // Find the initializers that were written in the source.
774      llvm::SmallVector<CXXBaseOrMemberInitializer *, 4> WrittenInits;
775      for (CXXConstructorDecl::init_iterator I = Constructor->init_begin(),
776                                          IEnd = Constructor->init_end();
777           I != IEnd; ++I) {
778        if (!(*I)->isWritten())
779          continue;
780
781        WrittenInits.push_back(*I);
782      }
783
784      // Sort the initializers in source order
785      llvm::array_pod_sort(WrittenInits.begin(), WrittenInits.end(),
786                           &CompareCXXBaseOrMemberInitializers);
787
788      // Visit the initializers in source order
789      for (unsigned I = 0, N = WrittenInits.size(); I != N; ++I) {
790        CXXBaseOrMemberInitializer *Init = WrittenInits[I];
791        if (Init->isMemberInitializer()) {
792          if (Visit(MakeCursorMemberRef(Init->getMember(),
793                                        Init->getMemberLocation(), TU)))
794            return true;
795        } else if (TypeSourceInfo *BaseInfo = Init->getBaseClassInfo()) {
796          if (Visit(BaseInfo->getTypeLoc()))
797            return true;
798        }
799
800        // Visit the initializer value.
801        if (Expr *Initializer = Init->getInit())
802          if (Visit(MakeCXCursor(Initializer, ND, TU)))
803            return true;
804      }
805    }
806
807    if (Visit(MakeCXCursor(ND->getBody(), StmtParent, TU)))
808      return true;
809  }
810
811  return false;
812}
813
814bool CursorVisitor::VisitFieldDecl(FieldDecl *D) {
815  if (VisitDeclaratorDecl(D))
816    return true;
817
818  if (Expr *BitWidth = D->getBitWidth())
819    return Visit(MakeCXCursor(BitWidth, StmtParent, TU));
820
821  return false;
822}
823
824bool CursorVisitor::VisitVarDecl(VarDecl *D) {
825  if (VisitDeclaratorDecl(D))
826    return true;
827
828  if (Expr *Init = D->getInit())
829    return Visit(MakeCXCursor(Init, StmtParent, TU));
830
831  return false;
832}
833
834bool CursorVisitor::VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
835  if (VisitDeclaratorDecl(D))
836    return true;
837
838  if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited())
839    if (Expr *DefArg = D->getDefaultArgument())
840      return Visit(MakeCXCursor(DefArg, StmtParent, TU));
841
842  return false;
843}
844
845bool CursorVisitor::VisitFunctionTemplateDecl(FunctionTemplateDecl *D) {
846  // FIXME: Visit the "outer" template parameter lists on the FunctionDecl
847  // before visiting these template parameters.
848  if (VisitTemplateParameters(D->getTemplateParameters()))
849    return true;
850
851  return VisitFunctionDecl(D->getTemplatedDecl());
852}
853
854bool CursorVisitor::VisitClassTemplateDecl(ClassTemplateDecl *D) {
855  // FIXME: Visit the "outer" template parameter lists on the TagDecl
856  // before visiting these template parameters.
857  if (VisitTemplateParameters(D->getTemplateParameters()))
858    return true;
859
860  return VisitCXXRecordDecl(D->getTemplatedDecl());
861}
862
863bool CursorVisitor::VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
864  if (VisitTemplateParameters(D->getTemplateParameters()))
865    return true;
866
867  if (D->hasDefaultArgument() && !D->defaultArgumentWasInherited() &&
868      VisitTemplateArgumentLoc(D->getDefaultArgument()))
869    return true;
870
871  return false;
872}
873
874bool CursorVisitor::VisitObjCMethodDecl(ObjCMethodDecl *ND) {
875  if (TypeSourceInfo *TSInfo = ND->getResultTypeSourceInfo())
876    if (Visit(TSInfo->getTypeLoc()))
877      return true;
878
879  for (ObjCMethodDecl::param_iterator P = ND->param_begin(),
880       PEnd = ND->param_end();
881       P != PEnd; ++P) {
882    if (Visit(MakeCXCursor(*P, TU)))
883      return true;
884  }
885
886  if (ND->isThisDeclarationADefinition() &&
887      Visit(MakeCXCursor(ND->getBody(), StmtParent, TU)))
888    return true;
889
890  return false;
891}
892
893namespace {
894  struct ContainerDeclsSort {
895    SourceManager &SM;
896    ContainerDeclsSort(SourceManager &sm) : SM(sm) {}
897    bool operator()(Decl *A, Decl *B) {
898      SourceLocation L_A = A->getLocStart();
899      SourceLocation L_B = B->getLocStart();
900      assert(L_A.isValid() && L_B.isValid());
901      return SM.isBeforeInTranslationUnit(L_A, L_B);
902    }
903  };
904}
905
906bool CursorVisitor::VisitObjCContainerDecl(ObjCContainerDecl *D) {
907  // FIXME: Eventually convert back to just 'VisitDeclContext()'.  Essentially
908  // an @implementation can lexically contain Decls that are not properly
909  // nested in the AST.  When we identify such cases, we need to retrofit
910  // this nesting here.
911  if (!DI_current)
912    return VisitDeclContext(D);
913
914  // Scan the Decls that immediately come after the container
915  // in the current DeclContext.  If any fall within the
916  // container's lexical region, stash them into a vector
917  // for later processing.
918  llvm::SmallVector<Decl *, 24> DeclsInContainer;
919  SourceLocation EndLoc = D->getSourceRange().getEnd();
920  SourceManager &SM = TU->getSourceManager();
921  if (EndLoc.isValid()) {
922    DeclContext::decl_iterator next = *DI_current;
923    while (++next != DE_current) {
924      Decl *D_next = *next;
925      if (!D_next)
926        break;
927      SourceLocation L = D_next->getLocStart();
928      if (!L.isValid())
929        break;
930      if (SM.isBeforeInTranslationUnit(L, EndLoc)) {
931        *DI_current = next;
932        DeclsInContainer.push_back(D_next);
933        continue;
934      }
935      break;
936    }
937  }
938
939  // The common case.
940  if (DeclsInContainer.empty())
941    return VisitDeclContext(D);
942
943  // Get all the Decls in the DeclContext, and sort them with the
944  // additional ones we've collected.  Then visit them.
945  for (DeclContext::decl_iterator I = D->decls_begin(), E = D->decls_end();
946       I!=E; ++I) {
947    Decl *subDecl = *I;
948    if (!subDecl || subDecl->getLexicalDeclContext() != D ||
949        subDecl->getLocStart().isInvalid())
950      continue;
951    DeclsInContainer.push_back(subDecl);
952  }
953
954  // Now sort the Decls so that they appear in lexical order.
955  std::sort(DeclsInContainer.begin(), DeclsInContainer.end(),
956            ContainerDeclsSort(SM));
957
958  // Now visit the decls.
959  for (llvm::SmallVectorImpl<Decl*>::iterator I = DeclsInContainer.begin(),
960         E = DeclsInContainer.end(); I != E; ++I) {
961    CXCursor Cursor = MakeCXCursor(*I, TU);
962    const llvm::Optional<bool> &V = shouldVisitCursor(Cursor);
963    if (!V.hasValue())
964      continue;
965    if (!V.getValue())
966      return false;
967    if (Visit(Cursor, true))
968      return true;
969  }
970  return false;
971}
972
973bool CursorVisitor::VisitObjCCategoryDecl(ObjCCategoryDecl *ND) {
974  if (Visit(MakeCursorObjCClassRef(ND->getClassInterface(), ND->getLocation(),
975                                   TU)))
976    return true;
977
978  ObjCCategoryDecl::protocol_loc_iterator PL = ND->protocol_loc_begin();
979  for (ObjCCategoryDecl::protocol_iterator I = ND->protocol_begin(),
980         E = ND->protocol_end(); I != E; ++I, ++PL)
981    if (Visit(MakeCursorObjCProtocolRef(*I, *PL, TU)))
982      return true;
983
984  return VisitObjCContainerDecl(ND);
985}
986
987bool CursorVisitor::VisitObjCProtocolDecl(ObjCProtocolDecl *PID) {
988  ObjCProtocolDecl::protocol_loc_iterator PL = PID->protocol_loc_begin();
989  for (ObjCProtocolDecl::protocol_iterator I = PID->protocol_begin(),
990       E = PID->protocol_end(); I != E; ++I, ++PL)
991    if (Visit(MakeCursorObjCProtocolRef(*I, *PL, TU)))
992      return true;
993
994  return VisitObjCContainerDecl(PID);
995}
996
997bool CursorVisitor::VisitObjCPropertyDecl(ObjCPropertyDecl *PD) {
998  if (PD->getTypeSourceInfo() && Visit(PD->getTypeSourceInfo()->getTypeLoc()))
999    return true;
1000
1001  // FIXME: This implements a workaround with @property declarations also being
1002  // installed in the DeclContext for the @interface.  Eventually this code
1003  // should be removed.
1004  ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(PD->getDeclContext());
1005  if (!CDecl || !CDecl->IsClassExtension())
1006    return false;
1007
1008  ObjCInterfaceDecl *ID = CDecl->getClassInterface();
1009  if (!ID)
1010    return false;
1011
1012  IdentifierInfo *PropertyId = PD->getIdentifier();
1013  ObjCPropertyDecl *prevDecl =
1014    ObjCPropertyDecl::findPropertyDecl(cast<DeclContext>(ID), PropertyId);
1015
1016  if (!prevDecl)
1017    return false;
1018
1019  // Visit synthesized methods since they will be skipped when visiting
1020  // the @interface.
1021  if (ObjCMethodDecl *MD = prevDecl->getGetterMethodDecl())
1022    if (MD->isSynthesized() && MD->getLexicalDeclContext() == CDecl)
1023      if (Visit(MakeCXCursor(MD, TU)))
1024        return true;
1025
1026  if (ObjCMethodDecl *MD = prevDecl->getSetterMethodDecl())
1027    if (MD->isSynthesized() && MD->getLexicalDeclContext() == CDecl)
1028      if (Visit(MakeCXCursor(MD, TU)))
1029        return true;
1030
1031  return false;
1032}
1033
1034bool CursorVisitor::VisitObjCInterfaceDecl(ObjCInterfaceDecl *D) {
1035  // Issue callbacks for super class.
1036  if (D->getSuperClass() &&
1037      Visit(MakeCursorObjCSuperClassRef(D->getSuperClass(),
1038                                        D->getSuperClassLoc(),
1039                                        TU)))
1040    return true;
1041
1042  ObjCInterfaceDecl::protocol_loc_iterator PL = D->protocol_loc_begin();
1043  for (ObjCInterfaceDecl::protocol_iterator I = D->protocol_begin(),
1044         E = D->protocol_end(); I != E; ++I, ++PL)
1045    if (Visit(MakeCursorObjCProtocolRef(*I, *PL, TU)))
1046      return true;
1047
1048  return VisitObjCContainerDecl(D);
1049}
1050
1051bool CursorVisitor::VisitObjCImplDecl(ObjCImplDecl *D) {
1052  return VisitObjCContainerDecl(D);
1053}
1054
1055bool CursorVisitor::VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D) {
1056  // 'ID' could be null when dealing with invalid code.
1057  if (ObjCInterfaceDecl *ID = D->getClassInterface())
1058    if (Visit(MakeCursorObjCClassRef(ID, D->getLocation(), TU)))
1059      return true;
1060
1061  return VisitObjCImplDecl(D);
1062}
1063
1064bool CursorVisitor::VisitObjCImplementationDecl(ObjCImplementationDecl *D) {
1065#if 0
1066  // Issue callbacks for super class.
1067  // FIXME: No source location information!
1068  if (D->getSuperClass() &&
1069      Visit(MakeCursorObjCSuperClassRef(D->getSuperClass(),
1070                                        D->getSuperClassLoc(),
1071                                        TU)))
1072    return true;
1073#endif
1074
1075  return VisitObjCImplDecl(D);
1076}
1077
1078bool CursorVisitor::VisitObjCForwardProtocolDecl(ObjCForwardProtocolDecl *D) {
1079  ObjCForwardProtocolDecl::protocol_loc_iterator PL = D->protocol_loc_begin();
1080  for (ObjCForwardProtocolDecl::protocol_iterator I = D->protocol_begin(),
1081                                                  E = D->protocol_end();
1082       I != E; ++I, ++PL)
1083    if (Visit(MakeCursorObjCProtocolRef(*I, *PL, TU)))
1084      return true;
1085
1086  return false;
1087}
1088
1089bool CursorVisitor::VisitObjCClassDecl(ObjCClassDecl *D) {
1090  for (ObjCClassDecl::iterator C = D->begin(), CEnd = D->end(); C != CEnd; ++C)
1091    if (Visit(MakeCursorObjCClassRef(C->getInterface(), C->getLocation(), TU)))
1092      return true;
1093
1094  return false;
1095}
1096
1097bool CursorVisitor::VisitNamespaceDecl(NamespaceDecl *D) {
1098  return VisitDeclContext(D);
1099}
1100
1101bool CursorVisitor::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
1102  // Visit nested-name-specifier.
1103  if (NestedNameSpecifier *Qualifier = D->getQualifier())
1104    if (VisitNestedNameSpecifier(Qualifier, D->getQualifierRange()))
1105      return true;
1106
1107  return Visit(MakeCursorNamespaceRef(D->getAliasedNamespace(),
1108                                      D->getTargetNameLoc(), TU));
1109}
1110
1111bool CursorVisitor::VisitUsingDecl(UsingDecl *D) {
1112  // Visit nested-name-specifier.
1113  if (NestedNameSpecifier *Qualifier = D->getTargetNestedNameDecl())
1114    if (VisitNestedNameSpecifier(Qualifier, D->getNestedNameRange()))
1115      return true;
1116
1117  if (Visit(MakeCursorOverloadedDeclRef(D, D->getLocation(), TU)))
1118    return true;
1119
1120  return VisitDeclarationNameInfo(D->getNameInfo());
1121}
1122
1123bool CursorVisitor::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
1124  // Visit nested-name-specifier.
1125  if (NestedNameSpecifier *Qualifier = D->getQualifier())
1126    if (VisitNestedNameSpecifier(Qualifier, D->getQualifierRange()))
1127      return true;
1128
1129  return Visit(MakeCursorNamespaceRef(D->getNominatedNamespaceAsWritten(),
1130                                      D->getIdentLocation(), TU));
1131}
1132
1133bool CursorVisitor::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
1134  // Visit nested-name-specifier.
1135  if (NestedNameSpecifier *Qualifier = D->getTargetNestedNameSpecifier())
1136    if (VisitNestedNameSpecifier(Qualifier, D->getTargetNestedNameRange()))
1137      return true;
1138
1139  return VisitDeclarationNameInfo(D->getNameInfo());
1140}
1141
1142bool CursorVisitor::VisitUnresolvedUsingTypenameDecl(
1143                                               UnresolvedUsingTypenameDecl *D) {
1144  // Visit nested-name-specifier.
1145  if (NestedNameSpecifier *Qualifier = D->getTargetNestedNameSpecifier())
1146    if (VisitNestedNameSpecifier(Qualifier, D->getTargetNestedNameRange()))
1147      return true;
1148
1149  return false;
1150}
1151
1152bool CursorVisitor::VisitDeclarationNameInfo(DeclarationNameInfo Name) {
1153  switch (Name.getName().getNameKind()) {
1154  case clang::DeclarationName::Identifier:
1155  case clang::DeclarationName::CXXLiteralOperatorName:
1156  case clang::DeclarationName::CXXOperatorName:
1157  case clang::DeclarationName::CXXUsingDirective:
1158    return false;
1159
1160  case clang::DeclarationName::CXXConstructorName:
1161  case clang::DeclarationName::CXXDestructorName:
1162  case clang::DeclarationName::CXXConversionFunctionName:
1163    if (TypeSourceInfo *TSInfo = Name.getNamedTypeInfo())
1164      return Visit(TSInfo->getTypeLoc());
1165    return false;
1166
1167  case clang::DeclarationName::ObjCZeroArgSelector:
1168  case clang::DeclarationName::ObjCOneArgSelector:
1169  case clang::DeclarationName::ObjCMultiArgSelector:
1170    // FIXME: Per-identifier location info?
1171    return false;
1172  }
1173
1174  return false;
1175}
1176
1177bool CursorVisitor::VisitNestedNameSpecifier(NestedNameSpecifier *NNS,
1178                                             SourceRange Range) {
1179  // FIXME: This whole routine is a hack to work around the lack of proper
1180  // source information in nested-name-specifiers (PR5791). Since we do have
1181  // a beginning source location, we can visit the first component of the
1182  // nested-name-specifier, if it's a single-token component.
1183  if (!NNS)
1184    return false;
1185
1186  // Get the first component in the nested-name-specifier.
1187  while (NestedNameSpecifier *Prefix = NNS->getPrefix())
1188    NNS = Prefix;
1189
1190  switch (NNS->getKind()) {
1191  case NestedNameSpecifier::Namespace:
1192    // FIXME: The token at this source location might actually have been a
1193    // namespace alias, but we don't model that. Lame!
1194    return Visit(MakeCursorNamespaceRef(NNS->getAsNamespace(), Range.getBegin(),
1195                                        TU));
1196
1197  case NestedNameSpecifier::TypeSpec: {
1198    // If the type has a form where we know that the beginning of the source
1199    // range matches up with a reference cursor. Visit the appropriate reference
1200    // cursor.
1201    Type *T = NNS->getAsType();
1202    if (const TypedefType *Typedef = dyn_cast<TypedefType>(T))
1203      return Visit(MakeCursorTypeRef(Typedef->getDecl(), Range.getBegin(), TU));
1204    if (const TagType *Tag = dyn_cast<TagType>(T))
1205      return Visit(MakeCursorTypeRef(Tag->getDecl(), Range.getBegin(), TU));
1206    if (const TemplateSpecializationType *TST
1207                                      = dyn_cast<TemplateSpecializationType>(T))
1208      return VisitTemplateName(TST->getTemplateName(), Range.getBegin());
1209    break;
1210  }
1211
1212  case NestedNameSpecifier::TypeSpecWithTemplate:
1213  case NestedNameSpecifier::Global:
1214  case NestedNameSpecifier::Identifier:
1215    break;
1216  }
1217
1218  return false;
1219}
1220
1221bool CursorVisitor::VisitTemplateParameters(
1222                                          const TemplateParameterList *Params) {
1223  if (!Params)
1224    return false;
1225
1226  for (TemplateParameterList::const_iterator P = Params->begin(),
1227                                          PEnd = Params->end();
1228       P != PEnd; ++P) {
1229    if (Visit(MakeCXCursor(*P, TU)))
1230      return true;
1231  }
1232
1233  return false;
1234}
1235
1236bool CursorVisitor::VisitTemplateName(TemplateName Name, SourceLocation Loc) {
1237  switch (Name.getKind()) {
1238  case TemplateName::Template:
1239    return Visit(MakeCursorTemplateRef(Name.getAsTemplateDecl(), Loc, TU));
1240
1241  case TemplateName::OverloadedTemplate:
1242    // Visit the overloaded template set.
1243    if (Visit(MakeCursorOverloadedDeclRef(Name, Loc, TU)))
1244      return true;
1245
1246    return false;
1247
1248  case TemplateName::DependentTemplate:
1249    // FIXME: Visit nested-name-specifier.
1250    return false;
1251
1252  case TemplateName::QualifiedTemplate:
1253    // FIXME: Visit nested-name-specifier.
1254    return Visit(MakeCursorTemplateRef(
1255                                  Name.getAsQualifiedTemplateName()->getDecl(),
1256                                       Loc, TU));
1257  }
1258
1259  return false;
1260}
1261
1262bool CursorVisitor::VisitTemplateArgumentLoc(const TemplateArgumentLoc &TAL) {
1263  switch (TAL.getArgument().getKind()) {
1264  case TemplateArgument::Null:
1265  case TemplateArgument::Integral:
1266    return false;
1267
1268  case TemplateArgument::Pack:
1269    // FIXME: Implement when variadic templates come along.
1270    return false;
1271
1272  case TemplateArgument::Type:
1273    if (TypeSourceInfo *TSInfo = TAL.getTypeSourceInfo())
1274      return Visit(TSInfo->getTypeLoc());
1275    return false;
1276
1277  case TemplateArgument::Declaration:
1278    if (Expr *E = TAL.getSourceDeclExpression())
1279      return Visit(MakeCXCursor(E, StmtParent, TU));
1280    return false;
1281
1282  case TemplateArgument::Expression:
1283    if (Expr *E = TAL.getSourceExpression())
1284      return Visit(MakeCXCursor(E, StmtParent, TU));
1285    return false;
1286
1287  case TemplateArgument::Template:
1288    return VisitTemplateName(TAL.getArgument().getAsTemplate(),
1289                             TAL.getTemplateNameLoc());
1290  }
1291
1292  return false;
1293}
1294
1295bool CursorVisitor::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
1296  return VisitDeclContext(D);
1297}
1298
1299bool CursorVisitor::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
1300  return Visit(TL.getUnqualifiedLoc());
1301}
1302
1303bool CursorVisitor::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
1304  ASTContext &Context = TU->getASTContext();
1305
1306  // Some builtin types (such as Objective-C's "id", "sel", and
1307  // "Class") have associated declarations. Create cursors for those.
1308  QualType VisitType;
1309  switch (TL.getType()->getAs<BuiltinType>()->getKind()) {
1310  case BuiltinType::Void:
1311  case BuiltinType::Bool:
1312  case BuiltinType::Char_U:
1313  case BuiltinType::UChar:
1314  case BuiltinType::Char16:
1315  case BuiltinType::Char32:
1316  case BuiltinType::UShort:
1317  case BuiltinType::UInt:
1318  case BuiltinType::ULong:
1319  case BuiltinType::ULongLong:
1320  case BuiltinType::UInt128:
1321  case BuiltinType::Char_S:
1322  case BuiltinType::SChar:
1323  case BuiltinType::WChar:
1324  case BuiltinType::Short:
1325  case BuiltinType::Int:
1326  case BuiltinType::Long:
1327  case BuiltinType::LongLong:
1328  case BuiltinType::Int128:
1329  case BuiltinType::Float:
1330  case BuiltinType::Double:
1331  case BuiltinType::LongDouble:
1332  case BuiltinType::NullPtr:
1333  case BuiltinType::Overload:
1334  case BuiltinType::Dependent:
1335    break;
1336
1337  case BuiltinType::UndeducedAuto: // FIXME: Deserves a cursor?
1338    break;
1339
1340  case BuiltinType::ObjCId:
1341    VisitType = Context.getObjCIdType();
1342    break;
1343
1344  case BuiltinType::ObjCClass:
1345    VisitType = Context.getObjCClassType();
1346    break;
1347
1348  case BuiltinType::ObjCSel:
1349    VisitType = Context.getObjCSelType();
1350    break;
1351  }
1352
1353  if (!VisitType.isNull()) {
1354    if (const TypedefType *Typedef = VisitType->getAs<TypedefType>())
1355      return Visit(MakeCursorTypeRef(Typedef->getDecl(), TL.getBuiltinLoc(),
1356                                     TU));
1357  }
1358
1359  return false;
1360}
1361
1362bool CursorVisitor::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
1363  return Visit(MakeCursorTypeRef(TL.getTypedefDecl(), TL.getNameLoc(), TU));
1364}
1365
1366bool CursorVisitor::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
1367  return Visit(MakeCursorTypeRef(TL.getDecl(), TL.getNameLoc(), TU));
1368}
1369
1370bool CursorVisitor::VisitTagTypeLoc(TagTypeLoc TL) {
1371  return Visit(MakeCursorTypeRef(TL.getDecl(), TL.getNameLoc(), TU));
1372}
1373
1374bool CursorVisitor::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
1375  // FIXME: We can't visit the template type parameter, because there's
1376  // no context information with which we can match up the depth/index in the
1377  // type to the appropriate
1378  return false;
1379}
1380
1381bool CursorVisitor::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
1382  if (Visit(MakeCursorObjCClassRef(TL.getIFaceDecl(), TL.getNameLoc(), TU)))
1383    return true;
1384
1385  return false;
1386}
1387
1388bool CursorVisitor::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
1389  if (TL.hasBaseTypeAsWritten() && Visit(TL.getBaseLoc()))
1390    return true;
1391
1392  for (unsigned I = 0, N = TL.getNumProtocols(); I != N; ++I) {
1393    if (Visit(MakeCursorObjCProtocolRef(TL.getProtocol(I), TL.getProtocolLoc(I),
1394                                        TU)))
1395      return true;
1396  }
1397
1398  return false;
1399}
1400
1401bool CursorVisitor::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
1402  return Visit(TL.getPointeeLoc());
1403}
1404
1405bool CursorVisitor::VisitPointerTypeLoc(PointerTypeLoc TL) {
1406  return Visit(TL.getPointeeLoc());
1407}
1408
1409bool CursorVisitor::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
1410  return Visit(TL.getPointeeLoc());
1411}
1412
1413bool CursorVisitor::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
1414  return Visit(TL.getPointeeLoc());
1415}
1416
1417bool CursorVisitor::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
1418  return Visit(TL.getPointeeLoc());
1419}
1420
1421bool CursorVisitor::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
1422  return Visit(TL.getPointeeLoc());
1423}
1424
1425bool CursorVisitor::VisitFunctionTypeLoc(FunctionTypeLoc TL,
1426                                         bool SkipResultType) {
1427  if (!SkipResultType && Visit(TL.getResultLoc()))
1428    return true;
1429
1430  for (unsigned I = 0, N = TL.getNumArgs(); I != N; ++I)
1431    if (Decl *D = TL.getArg(I))
1432      if (Visit(MakeCXCursor(D, TU)))
1433        return true;
1434
1435  return false;
1436}
1437
1438bool CursorVisitor::VisitArrayTypeLoc(ArrayTypeLoc TL) {
1439  if (Visit(TL.getElementLoc()))
1440    return true;
1441
1442  if (Expr *Size = TL.getSizeExpr())
1443    return Visit(MakeCXCursor(Size, StmtParent, TU));
1444
1445  return false;
1446}
1447
1448bool CursorVisitor::VisitTemplateSpecializationTypeLoc(
1449                                             TemplateSpecializationTypeLoc TL) {
1450  // Visit the template name.
1451  if (VisitTemplateName(TL.getTypePtr()->getTemplateName(),
1452                        TL.getTemplateNameLoc()))
1453    return true;
1454
1455  // Visit the template arguments.
1456  for (unsigned I = 0, N = TL.getNumArgs(); I != N; ++I)
1457    if (VisitTemplateArgumentLoc(TL.getArgLoc(I)))
1458      return true;
1459
1460  return false;
1461}
1462
1463bool CursorVisitor::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
1464  return Visit(MakeCXCursor(TL.getUnderlyingExpr(), StmtParent, TU));
1465}
1466
1467bool CursorVisitor::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
1468  if (TypeSourceInfo *TSInfo = TL.getUnderlyingTInfo())
1469    return Visit(TSInfo->getTypeLoc());
1470
1471  return false;
1472}
1473
1474bool CursorVisitor::VisitStmt(Stmt *S) {
1475  for (Stmt::child_iterator Child = S->child_begin(), ChildEnd = S->child_end();
1476       Child != ChildEnd; ++Child) {
1477    if (Stmt *C = *Child)
1478      if (Visit(MakeCXCursor(C, StmtParent, TU)))
1479        return true;
1480  }
1481
1482  return false;
1483}
1484
1485bool CursorVisitor::VisitDeclStmt(DeclStmt *S) {
1486  bool isFirst = true;
1487  for (DeclStmt::decl_iterator D = S->decl_begin(), DEnd = S->decl_end();
1488       D != DEnd; ++D) {
1489    if (*D && Visit(MakeCXCursor(*D, TU, isFirst)))
1490      return true;
1491    isFirst = false;
1492  }
1493
1494  return false;
1495}
1496
1497bool CursorVisitor::VisitGotoStmt(GotoStmt *S) {
1498  return Visit(MakeCursorLabelRef(S->getLabel(), S->getLabelLoc(), TU));
1499}
1500
1501bool CursorVisitor::VisitDeclRefExpr(DeclRefExpr *E) {
1502  // Visit nested-name-specifier, if present.
1503  if (NestedNameSpecifier *Qualifier = E->getQualifier())
1504    if (VisitNestedNameSpecifier(Qualifier, E->getQualifierRange()))
1505      return true;
1506
1507  // Visit declaration name.
1508  if (VisitDeclarationNameInfo(E->getNameInfo()))
1509    return true;
1510
1511  // Visit explicitly-specified template arguments.
1512  if (E->hasExplicitTemplateArgs()) {
1513    ExplicitTemplateArgumentList &Args = E->getExplicitTemplateArgs();
1514    for (TemplateArgumentLoc *Arg = Args.getTemplateArgs(),
1515                          *ArgEnd = Arg + Args.NumTemplateArgs;
1516         Arg != ArgEnd; ++Arg)
1517      if (VisitTemplateArgumentLoc(*Arg))
1518        return true;
1519  }
1520
1521  return false;
1522}
1523
1524bool CursorVisitor::VisitCXXRecordDecl(CXXRecordDecl *D) {
1525  if (D->isDefinition()) {
1526    for (CXXRecordDecl::base_class_iterator I = D->bases_begin(),
1527         E = D->bases_end(); I != E; ++I) {
1528      if (Visit(cxcursor::MakeCursorCXXBaseSpecifier(I, TU)))
1529        return true;
1530    }
1531  }
1532
1533  return VisitTagDecl(D);
1534}
1535
1536
1537bool CursorVisitor::VisitBlockExpr(BlockExpr *B) {
1538  return Visit(B->getBlockDecl());
1539}
1540
1541bool CursorVisitor::VisitOffsetOfExpr(OffsetOfExpr *E) {
1542  // Visit the type into which we're computing an offset.
1543  if (Visit(E->getTypeSourceInfo()->getTypeLoc()))
1544    return true;
1545
1546  // Visit the components of the offsetof expression.
1547  for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
1548    typedef OffsetOfExpr::OffsetOfNode OffsetOfNode;
1549    const OffsetOfNode &Node = E->getComponent(I);
1550    switch (Node.getKind()) {
1551    case OffsetOfNode::Array:
1552      if (Visit(MakeCXCursor(E->getIndexExpr(Node.getArrayExprIndex()),
1553                             StmtParent, TU)))
1554        return true;
1555      break;
1556
1557    case OffsetOfNode::Field:
1558      if (Visit(MakeCursorMemberRef(Node.getField(), Node.getRange().getEnd(),
1559                                    TU)))
1560        return true;
1561      break;
1562
1563    case OffsetOfNode::Identifier:
1564    case OffsetOfNode::Base:
1565      continue;
1566    }
1567  }
1568
1569  return false;
1570}
1571
1572bool CursorVisitor::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E) {
1573  if (E->isArgumentType()) {
1574    if (TypeSourceInfo *TSInfo = E->getArgumentTypeInfo())
1575      return Visit(TSInfo->getTypeLoc());
1576
1577    return false;
1578  }
1579
1580  return VisitExpr(E);
1581}
1582
1583bool CursorVisitor::VisitExplicitCastExpr(ExplicitCastExpr *E) {
1584  if (TypeSourceInfo *TSInfo = E->getTypeInfoAsWritten())
1585    if (Visit(TSInfo->getTypeLoc()))
1586      return true;
1587
1588  return VisitCastExpr(E);
1589}
1590
1591bool CursorVisitor::VisitAddrLabelExpr(AddrLabelExpr *E) {
1592  return Visit(MakeCursorLabelRef(E->getLabel(), E->getLabelLoc(), TU));
1593}
1594
1595bool CursorVisitor::VisitTypesCompatibleExpr(TypesCompatibleExpr *E) {
1596  return Visit(E->getArgTInfo1()->getTypeLoc()) ||
1597         Visit(E->getArgTInfo2()->getTypeLoc());
1598}
1599
1600bool CursorVisitor::VisitVAArgExpr(VAArgExpr *E) {
1601  if (Visit(E->getWrittenTypeInfo()->getTypeLoc()))
1602    return true;
1603
1604  return Visit(MakeCXCursor(E->getSubExpr(), StmtParent, TU));
1605}
1606
1607bool CursorVisitor::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
1608  // Visit the designators.
1609  typedef DesignatedInitExpr::Designator Designator;
1610  for (DesignatedInitExpr::designators_iterator D = E->designators_begin(),
1611                                             DEnd = E->designators_end();
1612       D != DEnd; ++D) {
1613    if (D->isFieldDesignator()) {
1614      if (FieldDecl *Field = D->getField())
1615        if (Visit(MakeCursorMemberRef(Field, D->getFieldLoc(), TU)))
1616          return true;
1617
1618      continue;
1619    }
1620
1621    if (D->isArrayDesignator()) {
1622      if (Visit(MakeCXCursor(E->getArrayIndex(*D), StmtParent, TU)))
1623        return true;
1624
1625      continue;
1626    }
1627
1628    assert(D->isArrayRangeDesignator() && "Unknown designator kind");
1629    if (Visit(MakeCXCursor(E->getArrayRangeStart(*D), StmtParent, TU)) ||
1630        Visit(MakeCXCursor(E->getArrayRangeEnd(*D), StmtParent, TU)))
1631      return true;
1632  }
1633
1634  // Visit the initializer value itself.
1635  return Visit(MakeCXCursor(E->getInit(), StmtParent, TU));
1636}
1637
1638bool CursorVisitor::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
1639  if (E->isTypeOperand()) {
1640    if (TypeSourceInfo *TSInfo = E->getTypeOperandSourceInfo())
1641      return Visit(TSInfo->getTypeLoc());
1642
1643    return false;
1644  }
1645
1646  return VisitExpr(E);
1647}
1648
1649bool CursorVisitor::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
1650  if (E->isTypeOperand()) {
1651    if (TypeSourceInfo *TSInfo = E->getTypeOperandSourceInfo())
1652      return Visit(TSInfo->getTypeLoc());
1653
1654    return false;
1655  }
1656
1657  return VisitExpr(E);
1658}
1659
1660bool CursorVisitor::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
1661  if (TypeSourceInfo *TSInfo = E->getTypeSourceInfo())
1662    if (Visit(TSInfo->getTypeLoc()))
1663      return true;
1664
1665  return VisitExpr(E);
1666}
1667
1668bool CursorVisitor::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
1669  if (TypeSourceInfo *TSInfo = E->getTypeSourceInfo())
1670    return Visit(TSInfo->getTypeLoc());
1671
1672  return false;
1673}
1674
1675bool CursorVisitor::VisitCXXNewExpr(CXXNewExpr *E) {
1676  // Visit placement arguments.
1677  for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I)
1678    if (Visit(MakeCXCursor(E->getPlacementArg(I), StmtParent, TU)))
1679      return true;
1680
1681  // Visit the allocated type.
1682  if (TypeSourceInfo *TSInfo = E->getAllocatedTypeSourceInfo())
1683    if (Visit(TSInfo->getTypeLoc()))
1684      return true;
1685
1686  // Visit the array size, if any.
1687  if (E->isArray() && Visit(MakeCXCursor(E->getArraySize(), StmtParent, TU)))
1688    return true;
1689
1690  // Visit the initializer or constructor arguments.
1691  for (unsigned I = 0, N = E->getNumConstructorArgs(); I != N; ++I)
1692    if (Visit(MakeCXCursor(E->getConstructorArg(I), StmtParent, TU)))
1693      return true;
1694
1695  return false;
1696}
1697
1698bool CursorVisitor::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
1699  // Visit base expression.
1700  if (Visit(MakeCXCursor(E->getBase(), StmtParent, TU)))
1701    return true;
1702
1703  // Visit the nested-name-specifier.
1704  if (NestedNameSpecifier *Qualifier = E->getQualifier())
1705    if (VisitNestedNameSpecifier(Qualifier, E->getQualifierRange()))
1706      return true;
1707
1708  // Visit the scope type that looks disturbingly like the nested-name-specifier
1709  // but isn't.
1710  if (TypeSourceInfo *TSInfo = E->getScopeTypeInfo())
1711    if (Visit(TSInfo->getTypeLoc()))
1712      return true;
1713
1714  // Visit the name of the type being destroyed.
1715  if (TypeSourceInfo *TSInfo = E->getDestroyedTypeInfo())
1716    if (Visit(TSInfo->getTypeLoc()))
1717      return true;
1718
1719  return false;
1720}
1721
1722bool CursorVisitor::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *E) {
1723  return Visit(E->getQueriedTypeSourceInfo()->getTypeLoc());
1724}
1725
1726bool CursorVisitor::VisitDependentScopeDeclRefExpr(
1727                                                DependentScopeDeclRefExpr *E) {
1728  // Visit the nested-name-specifier.
1729  if (NestedNameSpecifier *Qualifier = E->getQualifier())
1730    if (VisitNestedNameSpecifier(Qualifier, E->getQualifierRange()))
1731      return true;
1732
1733  // Visit the declaration name.
1734  if (VisitDeclarationNameInfo(E->getNameInfo()))
1735    return true;
1736
1737  // Visit the explicitly-specified template arguments.
1738  if (const ExplicitTemplateArgumentList *ArgList
1739      = E->getOptionalExplicitTemplateArgs()) {
1740    for (const TemplateArgumentLoc *Arg = ArgList->getTemplateArgs(),
1741         *ArgEnd = Arg + ArgList->NumTemplateArgs;
1742         Arg != ArgEnd; ++Arg) {
1743      if (VisitTemplateArgumentLoc(*Arg))
1744        return true;
1745    }
1746  }
1747
1748  return false;
1749}
1750
1751bool CursorVisitor::VisitCXXUnresolvedConstructExpr(
1752                                                CXXUnresolvedConstructExpr *E) {
1753  if (TypeSourceInfo *TSInfo = E->getTypeSourceInfo())
1754    if (Visit(TSInfo->getTypeLoc()))
1755      return true;
1756
1757  return VisitExpr(E);
1758}
1759
1760bool CursorVisitor::VisitCXXDependentScopeMemberExpr(
1761                                              CXXDependentScopeMemberExpr *E) {
1762  // Visit the base expression, if there is one.
1763  if (!E->isImplicitAccess() &&
1764      Visit(MakeCXCursor(E->getBase(), StmtParent, TU)))
1765    return true;
1766
1767  // Visit the nested-name-specifier.
1768  if (NestedNameSpecifier *Qualifier = E->getQualifier())
1769    if (VisitNestedNameSpecifier(Qualifier, E->getQualifierRange()))
1770      return true;
1771
1772  // Visit the declaration name.
1773  if (VisitDeclarationNameInfo(E->getMemberNameInfo()))
1774    return true;
1775
1776  // Visit the explicitly-specified template arguments.
1777  if (const ExplicitTemplateArgumentList *ArgList
1778      = E->getOptionalExplicitTemplateArgs()) {
1779    for (const TemplateArgumentLoc *Arg = ArgList->getTemplateArgs(),
1780         *ArgEnd = Arg + ArgList->NumTemplateArgs;
1781         Arg != ArgEnd; ++Arg) {
1782      if (VisitTemplateArgumentLoc(*Arg))
1783        return true;
1784    }
1785  }
1786
1787  return false;
1788}
1789
1790bool CursorVisitor::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
1791  return Visit(E->getEncodedTypeSourceInfo()->getTypeLoc());
1792}
1793
1794
1795bool CursorVisitor::VisitAttributes(Decl *D) {
1796  for (AttrVec::const_iterator i = D->attr_begin(), e = D->attr_end();
1797       i != e; ++i)
1798    if (Visit(MakeCXCursor(*i, D, TU)))
1799        return true;
1800
1801  return false;
1802}
1803
1804//===----------------------------------------------------------------------===//
1805// Data-recursive visitor methods.
1806//===----------------------------------------------------------------------===//
1807
1808static void EnqueueChildren(VisitorWorkList &WL, CXCursor Parent, Stmt *S) {
1809  unsigned size = WL.size();
1810  for (Stmt::child_iterator Child = S->child_begin(), ChildEnd = S->child_end();
1811       Child != ChildEnd; ++Child) {
1812    WLAddStmt(WL, Parent, *Child);
1813  }
1814  if (size == WL.size())
1815    return;
1816  // Now reverse the entries we just added.  This will match the DFS
1817  // ordering performed by the worklist.
1818  VisitorWorkList::iterator I = WL.begin() + size, E = WL.end();
1819  std::reverse(I, E);
1820}
1821
1822static void EnqueueOverloadExpr(VisitorWorkList &WL, CXCursor Parent,
1823                                OverloadExpr *E) {
1824  WL.push_back(OverloadExprParts(E, Parent));
1825}
1826
1827void CursorVisitor::EnqueueWorkList(VisitorWorkList &WL, Stmt *S) {
1828  CXCursor C = MakeCXCursor(S, StmtParent, TU);
1829  switch (S->getStmtClass()) {
1830    default:
1831      EnqueueChildren(WL, C, S);
1832      break;
1833    case Stmt::CompoundLiteralExprClass: {
1834      CompoundLiteralExpr *CL = cast<CompoundLiteralExpr>(S);
1835      EnqueueChildren(WL, C, CL);
1836      WLAddTypeLoc(WL, C, CL->getTypeSourceInfo());
1837      break;
1838    }
1839    case Stmt::CXXOperatorCallExprClass: {
1840      CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(S);
1841      // Note that we enqueue things in reverse order so that
1842      // they are visited correctly by the DFS.
1843      for (unsigned I = 1, N = CE->getNumArgs(); I != N; ++I)
1844        WLAddStmt(WL, C, CE->getArg(N-I));
1845
1846      WLAddStmt(WL, C, CE->getCallee());
1847      WLAddStmt(WL, C, CE->getArg(0));
1848      break;
1849    }
1850    case Stmt::BinaryOperatorClass: {
1851      BinaryOperator *B = cast<BinaryOperator>(S);
1852      WLAddStmt(WL, C, B->getRHS());
1853      WLAddStmt(WL, C, B->getLHS());
1854      break;
1855    }
1856    case Stmt::ForStmtClass: {
1857      ForStmt *FS = cast<ForStmt>(S);
1858      WLAddStmt(WL, C, FS->getBody());
1859      WLAddStmt(WL, C, FS->getInc());
1860      WLAddStmt(WL, C, FS->getCond());
1861      WLAddDecl(WL, C, FS->getConditionVariable());
1862      WLAddStmt(WL, C, FS->getInit());
1863      break;
1864    }
1865    case Stmt::IfStmtClass: {
1866      IfStmt *If = cast<IfStmt>(S);
1867      WLAddStmt(WL, C, If->getElse());
1868      WLAddStmt(WL, C, If->getThen());
1869      WLAddStmt(WL, C, If->getCond());
1870      WLAddDecl(WL, C, If->getConditionVariable());
1871      break;
1872    }
1873    case Stmt::InitListExprClass: {
1874      InitListExpr *IE = cast<InitListExpr>(S);
1875      // We care about the syntactic form of the initializer list, only.
1876      if (InitListExpr *Syntactic = IE->getSyntacticForm())
1877        IE = Syntactic;
1878      EnqueueChildren(WL, C, IE);
1879      break;
1880    }
1881    case Stmt::MemberExprClass: {
1882      MemberExpr *M = cast<MemberExpr>(S);
1883      WL.push_back(MemberExprParts(M, C));
1884      WLAddStmt(WL, C, M->getBase());
1885      break;
1886    }
1887    case Stmt::ObjCMessageExprClass:
1888      EnqueueChildren(WL, C, S);
1889      WLAddTypeLoc(WL, C, cast<ObjCMessageExpr>(S)->getClassReceiverTypeInfo());
1890      break;
1891    case Stmt::ParenExprClass: {
1892      WLAddStmt(WL, C, cast<ParenExpr>(S)->getSubExpr());
1893      break;
1894    }
1895    case Stmt::SwitchStmtClass: {
1896      SwitchStmt *SS = cast<SwitchStmt>(S);
1897      WLAddStmt(WL, C, SS->getBody());
1898      WLAddStmt(WL, C, SS->getCond());
1899      WLAddDecl(WL, C, SS->getConditionVariable());
1900      break;
1901    }
1902    case Stmt::WhileStmtClass: {
1903      WhileStmt *W = cast<WhileStmt>(S);
1904      WLAddStmt(WL, C, W->getBody());
1905      WLAddStmt(WL, C, W->getCond());
1906      WLAddDecl(WL, C, W->getConditionVariable());
1907      break;
1908    }
1909    case Stmt::UnresolvedLookupExprClass:
1910      EnqueueOverloadExpr(WL, C, cast<OverloadExpr>(S));
1911      break;
1912   case Stmt::UnresolvedMemberExprClass: {
1913     UnresolvedMemberExpr *U = cast<UnresolvedMemberExpr>(S);
1914     EnqueueOverloadExpr(WL, C, U);
1915     if (!U->isImplicitAccess())
1916       WLAddStmt(WL, C, U->getBase());
1917     break;
1918   }
1919  }
1920}
1921
1922bool CursorVisitor::IsInRegionOfInterest(CXCursor C) {
1923  if (RegionOfInterest.isValid()) {
1924    SourceRange Range = getRawCursorExtent(C);
1925    if (Range.isInvalid() || CompareRegionOfInterest(Range))
1926      return false;
1927  }
1928  return true;
1929}
1930
1931bool CursorVisitor::RunVisitorWorkList(VisitorWorkList &WL) {
1932  while (!WL.empty()) {
1933    // Dequeue the worklist item.
1934    VisitorJob LI = WL.back(); WL.pop_back();
1935
1936    // Set the Parent field, then back to its old value once we're done.
1937    SetParentRAII SetParent(Parent, StmtParent, LI.getParent());
1938
1939    switch (LI.getKind()) {
1940      case VisitorJob::DeclVisitKind: {
1941        Decl *D = cast<DeclVisit>(LI).get();
1942        if (!D)
1943          continue;
1944
1945        // For now, perform default visitation for Decls.
1946        if (Visit(MakeCXCursor(D, TU)))
1947            return true;
1948
1949        continue;
1950      }
1951      case VisitorJob::TypeLocVisitKind: {
1952        // Perform default visitation for TypeLocs.
1953        if (Visit(cast<TypeLocVisit>(LI).get()))
1954          return true;
1955        continue;
1956      }
1957      case VisitorJob::StmtVisitKind: {
1958        Stmt *S = cast<StmtVisit>(LI).get();
1959        if (!S)
1960          continue;
1961
1962        // Update the current cursor.
1963        CXCursor Cursor = MakeCXCursor(S, StmtParent, TU);
1964
1965        switch (S->getStmtClass()) {
1966          default: {
1967            // Perform default visitation for other cases.
1968            if (Visit(Cursor))
1969              return true;
1970            continue;
1971          }
1972          case Stmt::BinaryOperatorClass:
1973          case Stmt::CallExprClass:
1974          case Stmt::CaseStmtClass:
1975          case Stmt::CompoundLiteralExprClass:
1976          case Stmt::CompoundStmtClass:
1977          case Stmt::CXXMemberCallExprClass:
1978          case Stmt::CXXOperatorCallExprClass:
1979          case Stmt::DefaultStmtClass:
1980          case Stmt::DoStmtClass:
1981          case Stmt::ForStmtClass:
1982          case Stmt::IfStmtClass:
1983          case Stmt::InitListExprClass:
1984          case Stmt::MemberExprClass:
1985          case Stmt::ObjCMessageExprClass:
1986          case Stmt::ParenExprClass:
1987          case Stmt::SwitchStmtClass:
1988          case Stmt::UnaryOperatorClass:
1989          case Stmt::UnresolvedLookupExprClass:
1990          case Stmt::UnresolvedMemberExprClass:
1991          case Stmt::WhileStmtClass:
1992          {
1993            if (!IsInRegionOfInterest(Cursor))
1994              continue;
1995            switch (Visitor(Cursor, Parent, ClientData)) {
1996              case CXChildVisit_Break:
1997                return true;
1998              case CXChildVisit_Continue:
1999                break;
2000              case CXChildVisit_Recurse:
2001                EnqueueWorkList(WL, S);
2002                break;
2003            }
2004          }
2005        }
2006        continue;
2007      }
2008      case VisitorJob::MemberExprPartsKind: {
2009        // Handle the other pieces in the MemberExpr besides the base.
2010        MemberExpr *M = cast<MemberExprParts>(LI).get();
2011
2012        // Visit the nested-name-specifier
2013        if (NestedNameSpecifier *Qualifier = M->getQualifier())
2014          if (VisitNestedNameSpecifier(Qualifier, M->getQualifierRange()))
2015            return true;
2016
2017        // Visit the declaration name.
2018        if (VisitDeclarationNameInfo(M->getMemberNameInfo()))
2019          return true;
2020
2021        // Visit the explicitly-specified template arguments, if any.
2022        if (M->hasExplicitTemplateArgs()) {
2023          for (const TemplateArgumentLoc *Arg = M->getTemplateArgs(),
2024               *ArgEnd = Arg + M->getNumTemplateArgs();
2025               Arg != ArgEnd; ++Arg) {
2026            if (VisitTemplateArgumentLoc(*Arg))
2027              return true;
2028          }
2029        }
2030        continue;
2031      }
2032      case VisitorJob::OverloadExprPartsKind: {
2033        OverloadExpr *O = cast<OverloadExprParts>(LI).get();
2034        // Visit the nested-name-specifier.
2035        if (NestedNameSpecifier *Qualifier = O->getQualifier())
2036          if (VisitNestedNameSpecifier(Qualifier, O->getQualifierRange()))
2037            return true;
2038        // Visit the declaration name.
2039        if (VisitDeclarationNameInfo(O->getNameInfo()))
2040          return true;
2041        // Visit the overloaded declaration reference.
2042        if (Visit(MakeCursorOverloadedDeclRef(O, TU)))
2043          return true;
2044        // Visit the explicitly-specified template arguments.
2045        if (const ExplicitTemplateArgumentList *ArgList
2046                                      = O->getOptionalExplicitTemplateArgs()) {
2047          for (const TemplateArgumentLoc *Arg = ArgList->getTemplateArgs(),
2048                 *ArgEnd = Arg + ArgList->NumTemplateArgs;
2049               Arg != ArgEnd; ++Arg) {
2050            if (VisitTemplateArgumentLoc(*Arg))
2051              return true;
2052          }
2053        }
2054        continue;
2055      }
2056    }
2057  }
2058  return false;
2059}
2060
2061bool CursorVisitor::VisitDataRecursive(Stmt *S) {
2062  VisitorWorkList WL;
2063  EnqueueWorkList(WL, S);
2064  return RunVisitorWorkList(WL);
2065}
2066
2067//===----------------------------------------------------------------------===//
2068// Misc. API hooks.
2069//===----------------------------------------------------------------------===//
2070
2071static llvm::sys::Mutex EnableMultithreadingMutex;
2072static bool EnabledMultithreading;
2073
2074extern "C" {
2075CXIndex clang_createIndex(int excludeDeclarationsFromPCH,
2076                          int displayDiagnostics) {
2077  // Disable pretty stack trace functionality, which will otherwise be a very
2078  // poor citizen of the world and set up all sorts of signal handlers.
2079  llvm::DisablePrettyStackTrace = true;
2080
2081  // We use crash recovery to make some of our APIs more reliable, implicitly
2082  // enable it.
2083  llvm::CrashRecoveryContext::Enable();
2084
2085  // Enable support for multithreading in LLVM.
2086  {
2087    llvm::sys::ScopedLock L(EnableMultithreadingMutex);
2088    if (!EnabledMultithreading) {
2089      llvm::llvm_start_multithreaded();
2090      EnabledMultithreading = true;
2091    }
2092  }
2093
2094  CIndexer *CIdxr = new CIndexer();
2095  if (excludeDeclarationsFromPCH)
2096    CIdxr->setOnlyLocalDecls();
2097  if (displayDiagnostics)
2098    CIdxr->setDisplayDiagnostics();
2099  return CIdxr;
2100}
2101
2102void clang_disposeIndex(CXIndex CIdx) {
2103  if (CIdx)
2104    delete static_cast<CIndexer *>(CIdx);
2105}
2106
2107CXTranslationUnit clang_createTranslationUnit(CXIndex CIdx,
2108                                              const char *ast_filename) {
2109  if (!CIdx)
2110    return 0;
2111
2112  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
2113  FileSystemOptions FileSystemOpts;
2114  FileSystemOpts.WorkingDir = CXXIdx->getWorkingDirectory();
2115
2116  llvm::IntrusiveRefCntPtr<Diagnostic> Diags;
2117  return ASTUnit::LoadFromASTFile(ast_filename, Diags, FileSystemOpts,
2118                                  CXXIdx->getOnlyLocalDecls(),
2119                                  0, 0, true);
2120}
2121
2122unsigned clang_defaultEditingTranslationUnitOptions() {
2123  return CXTranslationUnit_PrecompiledPreamble |
2124         CXTranslationUnit_CacheCompletionResults |
2125         CXTranslationUnit_CXXPrecompiledPreamble;
2126}
2127
2128CXTranslationUnit
2129clang_createTranslationUnitFromSourceFile(CXIndex CIdx,
2130                                          const char *source_filename,
2131                                          int num_command_line_args,
2132                                          const char * const *command_line_args,
2133                                          unsigned num_unsaved_files,
2134                                          struct CXUnsavedFile *unsaved_files) {
2135  return clang_parseTranslationUnit(CIdx, source_filename,
2136                                    command_line_args, num_command_line_args,
2137                                    unsaved_files, num_unsaved_files,
2138                                 CXTranslationUnit_DetailedPreprocessingRecord);
2139}
2140
2141struct ParseTranslationUnitInfo {
2142  CXIndex CIdx;
2143  const char *source_filename;
2144  const char *const *command_line_args;
2145  int num_command_line_args;
2146  struct CXUnsavedFile *unsaved_files;
2147  unsigned num_unsaved_files;
2148  unsigned options;
2149  CXTranslationUnit result;
2150};
2151static void clang_parseTranslationUnit_Impl(void *UserData) {
2152  ParseTranslationUnitInfo *PTUI =
2153    static_cast<ParseTranslationUnitInfo*>(UserData);
2154  CXIndex CIdx = PTUI->CIdx;
2155  const char *source_filename = PTUI->source_filename;
2156  const char * const *command_line_args = PTUI->command_line_args;
2157  int num_command_line_args = PTUI->num_command_line_args;
2158  struct CXUnsavedFile *unsaved_files = PTUI->unsaved_files;
2159  unsigned num_unsaved_files = PTUI->num_unsaved_files;
2160  unsigned options = PTUI->options;
2161  PTUI->result = 0;
2162
2163  if (!CIdx)
2164    return;
2165
2166  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
2167
2168  bool PrecompilePreamble = options & CXTranslationUnit_PrecompiledPreamble;
2169  bool CompleteTranslationUnit
2170    = ((options & CXTranslationUnit_Incomplete) == 0);
2171  bool CacheCodeCompetionResults
2172    = options & CXTranslationUnit_CacheCompletionResults;
2173  bool CXXPrecompilePreamble
2174    = options & CXTranslationUnit_CXXPrecompiledPreamble;
2175  bool CXXChainedPCH
2176    = options & CXTranslationUnit_CXXChainedPCH;
2177
2178  // Configure the diagnostics.
2179  DiagnosticOptions DiagOpts;
2180  llvm::IntrusiveRefCntPtr<Diagnostic> Diags;
2181  Diags = CompilerInstance::createDiagnostics(DiagOpts, 0, 0);
2182
2183  llvm::SmallVector<ASTUnit::RemappedFile, 4> RemappedFiles;
2184  for (unsigned I = 0; I != num_unsaved_files; ++I) {
2185    llvm::StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
2186    const llvm::MemoryBuffer *Buffer
2187      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
2188    RemappedFiles.push_back(std::make_pair(unsaved_files[I].Filename,
2189                                           Buffer));
2190  }
2191
2192  llvm::SmallVector<const char *, 16> Args;
2193
2194  // The 'source_filename' argument is optional.  If the caller does not
2195  // specify it then it is assumed that the source file is specified
2196  // in the actual argument list.
2197  if (source_filename)
2198    Args.push_back(source_filename);
2199
2200  // Since the Clang C library is primarily used by batch tools dealing with
2201  // (often very broken) source code, where spell-checking can have a
2202  // significant negative impact on performance (particularly when
2203  // precompiled headers are involved), we disable it by default.
2204  // Only do this if we haven't found a spell-checking-related argument.
2205  bool FoundSpellCheckingArgument = false;
2206  for (int I = 0; I != num_command_line_args; ++I) {
2207    if (strcmp(command_line_args[I], "-fno-spell-checking") == 0 ||
2208        strcmp(command_line_args[I], "-fspell-checking") == 0) {
2209      FoundSpellCheckingArgument = true;
2210      break;
2211    }
2212  }
2213  if (!FoundSpellCheckingArgument)
2214    Args.push_back("-fno-spell-checking");
2215
2216  Args.insert(Args.end(), command_line_args,
2217              command_line_args + num_command_line_args);
2218
2219  // Do we need the detailed preprocessing record?
2220  if (options & CXTranslationUnit_DetailedPreprocessingRecord) {
2221    Args.push_back("-Xclang");
2222    Args.push_back("-detailed-preprocessing-record");
2223  }
2224
2225  unsigned NumErrors = Diags->getNumErrors();
2226  llvm::OwningPtr<ASTUnit> Unit(
2227    ASTUnit::LoadFromCommandLine(Args.data(), Args.data() + Args.size(),
2228                                 Diags,
2229                                 CXXIdx->getClangResourcesPath(),
2230                                 CXXIdx->getOnlyLocalDecls(),
2231                                 /*CaptureDiagnostics=*/true,
2232                                 RemappedFiles.data(),
2233                                 RemappedFiles.size(),
2234                                 PrecompilePreamble,
2235                                 CompleteTranslationUnit,
2236                                 CacheCodeCompetionResults,
2237                                 CXXPrecompilePreamble,
2238                                 CXXChainedPCH));
2239
2240  if (NumErrors != Diags->getNumErrors()) {
2241    // Make sure to check that 'Unit' is non-NULL.
2242    if (CXXIdx->getDisplayDiagnostics() && Unit.get()) {
2243      for (ASTUnit::stored_diag_iterator D = Unit->stored_diag_begin(),
2244                                      DEnd = Unit->stored_diag_end();
2245           D != DEnd; ++D) {
2246        CXStoredDiagnostic Diag(*D, Unit->getASTContext().getLangOptions());
2247        CXString Msg = clang_formatDiagnostic(&Diag,
2248                                    clang_defaultDiagnosticDisplayOptions());
2249        fprintf(stderr, "%s\n", clang_getCString(Msg));
2250        clang_disposeString(Msg);
2251      }
2252#ifdef LLVM_ON_WIN32
2253      // On Windows, force a flush, since there may be multiple copies of
2254      // stderr and stdout in the file system, all with different buffers
2255      // but writing to the same device.
2256      fflush(stderr);
2257#endif
2258    }
2259  }
2260
2261  PTUI->result = Unit.take();
2262}
2263CXTranslationUnit clang_parseTranslationUnit(CXIndex CIdx,
2264                                             const char *source_filename,
2265                                         const char * const *command_line_args,
2266                                             int num_command_line_args,
2267                                            struct CXUnsavedFile *unsaved_files,
2268                                             unsigned num_unsaved_files,
2269                                             unsigned options) {
2270  ParseTranslationUnitInfo PTUI = { CIdx, source_filename, command_line_args,
2271                                    num_command_line_args, unsaved_files,
2272                                    num_unsaved_files, options, 0 };
2273  llvm::CrashRecoveryContext CRC;
2274
2275  if (!RunSafely(CRC, clang_parseTranslationUnit_Impl, &PTUI)) {
2276    fprintf(stderr, "libclang: crash detected during parsing: {\n");
2277    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
2278    fprintf(stderr, "  'command_line_args' : [");
2279    for (int i = 0; i != num_command_line_args; ++i) {
2280      if (i)
2281        fprintf(stderr, ", ");
2282      fprintf(stderr, "'%s'", command_line_args[i]);
2283    }
2284    fprintf(stderr, "],\n");
2285    fprintf(stderr, "  'unsaved_files' : [");
2286    for (unsigned i = 0; i != num_unsaved_files; ++i) {
2287      if (i)
2288        fprintf(stderr, ", ");
2289      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
2290              unsaved_files[i].Length);
2291    }
2292    fprintf(stderr, "],\n");
2293    fprintf(stderr, "  'options' : %d,\n", options);
2294    fprintf(stderr, "}\n");
2295
2296    return 0;
2297  }
2298
2299  return PTUI.result;
2300}
2301
2302unsigned clang_defaultSaveOptions(CXTranslationUnit TU) {
2303  return CXSaveTranslationUnit_None;
2304}
2305
2306int clang_saveTranslationUnit(CXTranslationUnit TU, const char *FileName,
2307                              unsigned options) {
2308  if (!TU)
2309    return 1;
2310
2311  return static_cast<ASTUnit *>(TU)->Save(FileName);
2312}
2313
2314void clang_disposeTranslationUnit(CXTranslationUnit CTUnit) {
2315  if (CTUnit) {
2316    // If the translation unit has been marked as unsafe to free, just discard
2317    // it.
2318    if (static_cast<ASTUnit *>(CTUnit)->isUnsafeToFree())
2319      return;
2320
2321    delete static_cast<ASTUnit *>(CTUnit);
2322  }
2323}
2324
2325unsigned clang_defaultReparseOptions(CXTranslationUnit TU) {
2326  return CXReparse_None;
2327}
2328
2329struct ReparseTranslationUnitInfo {
2330  CXTranslationUnit TU;
2331  unsigned num_unsaved_files;
2332  struct CXUnsavedFile *unsaved_files;
2333  unsigned options;
2334  int result;
2335};
2336
2337static void clang_reparseTranslationUnit_Impl(void *UserData) {
2338  ReparseTranslationUnitInfo *RTUI =
2339    static_cast<ReparseTranslationUnitInfo*>(UserData);
2340  CXTranslationUnit TU = RTUI->TU;
2341  unsigned num_unsaved_files = RTUI->num_unsaved_files;
2342  struct CXUnsavedFile *unsaved_files = RTUI->unsaved_files;
2343  unsigned options = RTUI->options;
2344  (void) options;
2345  RTUI->result = 1;
2346
2347  if (!TU)
2348    return;
2349
2350  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
2351  ASTUnit::ConcurrencyCheck Check(*CXXUnit);
2352
2353  llvm::SmallVector<ASTUnit::RemappedFile, 4> RemappedFiles;
2354  for (unsigned I = 0; I != num_unsaved_files; ++I) {
2355    llvm::StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
2356    const llvm::MemoryBuffer *Buffer
2357      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
2358    RemappedFiles.push_back(std::make_pair(unsaved_files[I].Filename,
2359                                           Buffer));
2360  }
2361
2362  if (!CXXUnit->Reparse(RemappedFiles.data(), RemappedFiles.size()))
2363    RTUI->result = 0;
2364}
2365
2366int clang_reparseTranslationUnit(CXTranslationUnit TU,
2367                                 unsigned num_unsaved_files,
2368                                 struct CXUnsavedFile *unsaved_files,
2369                                 unsigned options) {
2370  ReparseTranslationUnitInfo RTUI = { TU, num_unsaved_files, unsaved_files,
2371                                      options, 0 };
2372  llvm::CrashRecoveryContext CRC;
2373
2374  if (!RunSafely(CRC, clang_reparseTranslationUnit_Impl, &RTUI)) {
2375    fprintf(stderr, "libclang: crash detected during reparsing\n");
2376    static_cast<ASTUnit *>(TU)->setUnsafeToFree(true);
2377    return 1;
2378  }
2379
2380
2381  return RTUI.result;
2382}
2383
2384
2385CXString clang_getTranslationUnitSpelling(CXTranslationUnit CTUnit) {
2386  if (!CTUnit)
2387    return createCXString("");
2388
2389  ASTUnit *CXXUnit = static_cast<ASTUnit *>(CTUnit);
2390  return createCXString(CXXUnit->getOriginalSourceFileName(), true);
2391}
2392
2393CXCursor clang_getTranslationUnitCursor(CXTranslationUnit TU) {
2394  CXCursor Result = { CXCursor_TranslationUnit, { 0, 0, TU } };
2395  return Result;
2396}
2397
2398} // end: extern "C"
2399
2400//===----------------------------------------------------------------------===//
2401// CXSourceLocation and CXSourceRange Operations.
2402//===----------------------------------------------------------------------===//
2403
2404extern "C" {
2405CXSourceLocation clang_getNullLocation() {
2406  CXSourceLocation Result = { { 0, 0 }, 0 };
2407  return Result;
2408}
2409
2410unsigned clang_equalLocations(CXSourceLocation loc1, CXSourceLocation loc2) {
2411  return (loc1.ptr_data[0] == loc2.ptr_data[0] &&
2412          loc1.ptr_data[1] == loc2.ptr_data[1] &&
2413          loc1.int_data == loc2.int_data);
2414}
2415
2416CXSourceLocation clang_getLocation(CXTranslationUnit tu,
2417                                   CXFile file,
2418                                   unsigned line,
2419                                   unsigned column) {
2420  if (!tu || !file)
2421    return clang_getNullLocation();
2422
2423  ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu);
2424  SourceLocation SLoc
2425    = CXXUnit->getSourceManager().getLocation(
2426                                        static_cast<const FileEntry *>(file),
2427                                              line, column);
2428  if (SLoc.isInvalid()) return clang_getNullLocation();
2429
2430  return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
2431}
2432
2433CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
2434                                            CXFile file,
2435                                            unsigned offset) {
2436  if (!tu || !file)
2437    return clang_getNullLocation();
2438
2439  ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu);
2440  SourceLocation Start
2441    = CXXUnit->getSourceManager().getLocation(
2442                                        static_cast<const FileEntry *>(file),
2443                                              1, 1);
2444  if (Start.isInvalid()) return clang_getNullLocation();
2445
2446  SourceLocation SLoc = Start.getFileLocWithOffset(offset);
2447
2448  if (SLoc.isInvalid()) return clang_getNullLocation();
2449
2450  return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
2451}
2452
2453CXSourceRange clang_getNullRange() {
2454  CXSourceRange Result = { { 0, 0 }, 0, 0 };
2455  return Result;
2456}
2457
2458CXSourceRange clang_getRange(CXSourceLocation begin, CXSourceLocation end) {
2459  if (begin.ptr_data[0] != end.ptr_data[0] ||
2460      begin.ptr_data[1] != end.ptr_data[1])
2461    return clang_getNullRange();
2462
2463  CXSourceRange Result = { { begin.ptr_data[0], begin.ptr_data[1] },
2464                           begin.int_data, end.int_data };
2465  return Result;
2466}
2467
2468void clang_getInstantiationLocation(CXSourceLocation location,
2469                                    CXFile *file,
2470                                    unsigned *line,
2471                                    unsigned *column,
2472                                    unsigned *offset) {
2473  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
2474
2475  if (!location.ptr_data[0] || Loc.isInvalid()) {
2476    if (file)
2477      *file = 0;
2478    if (line)
2479      *line = 0;
2480    if (column)
2481      *column = 0;
2482    if (offset)
2483      *offset = 0;
2484    return;
2485  }
2486
2487  const SourceManager &SM =
2488    *static_cast<const SourceManager*>(location.ptr_data[0]);
2489  SourceLocation InstLoc = SM.getInstantiationLoc(Loc);
2490
2491  if (file)
2492    *file = (void *)SM.getFileEntryForID(SM.getFileID(InstLoc));
2493  if (line)
2494    *line = SM.getInstantiationLineNumber(InstLoc);
2495  if (column)
2496    *column = SM.getInstantiationColumnNumber(InstLoc);
2497  if (offset)
2498    *offset = SM.getDecomposedLoc(InstLoc).second;
2499}
2500
2501void clang_getSpellingLocation(CXSourceLocation location,
2502                               CXFile *file,
2503                               unsigned *line,
2504                               unsigned *column,
2505                               unsigned *offset) {
2506  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
2507
2508  if (!location.ptr_data[0] || Loc.isInvalid()) {
2509    if (file)
2510      *file = 0;
2511    if (line)
2512      *line = 0;
2513    if (column)
2514      *column = 0;
2515    if (offset)
2516      *offset = 0;
2517    return;
2518  }
2519
2520  const SourceManager &SM =
2521    *static_cast<const SourceManager*>(location.ptr_data[0]);
2522  SourceLocation SpellLoc = Loc;
2523  if (SpellLoc.isMacroID()) {
2524    SourceLocation SimpleSpellingLoc = SM.getImmediateSpellingLoc(SpellLoc);
2525    if (SimpleSpellingLoc.isFileID() &&
2526        SM.getFileEntryForID(SM.getDecomposedLoc(SimpleSpellingLoc).first))
2527      SpellLoc = SimpleSpellingLoc;
2528    else
2529      SpellLoc = SM.getInstantiationLoc(SpellLoc);
2530  }
2531
2532  std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SpellLoc);
2533  FileID FID = LocInfo.first;
2534  unsigned FileOffset = LocInfo.second;
2535
2536  if (file)
2537    *file = (void *)SM.getFileEntryForID(FID);
2538  if (line)
2539    *line = SM.getLineNumber(FID, FileOffset);
2540  if (column)
2541    *column = SM.getColumnNumber(FID, FileOffset);
2542  if (offset)
2543    *offset = FileOffset;
2544}
2545
2546CXSourceLocation clang_getRangeStart(CXSourceRange range) {
2547  CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] },
2548                              range.begin_int_data };
2549  return Result;
2550}
2551
2552CXSourceLocation clang_getRangeEnd(CXSourceRange range) {
2553  CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] },
2554                              range.end_int_data };
2555  return Result;
2556}
2557
2558} // end: extern "C"
2559
2560//===----------------------------------------------------------------------===//
2561// CXFile Operations.
2562//===----------------------------------------------------------------------===//
2563
2564extern "C" {
2565CXString clang_getFileName(CXFile SFile) {
2566  if (!SFile)
2567    return createCXString(NULL);
2568
2569  FileEntry *FEnt = static_cast<FileEntry *>(SFile);
2570  return createCXString(FEnt->getName());
2571}
2572
2573time_t clang_getFileTime(CXFile SFile) {
2574  if (!SFile)
2575    return 0;
2576
2577  FileEntry *FEnt = static_cast<FileEntry *>(SFile);
2578  return FEnt->getModificationTime();
2579}
2580
2581CXFile clang_getFile(CXTranslationUnit tu, const char *file_name) {
2582  if (!tu)
2583    return 0;
2584
2585  ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu);
2586
2587  FileManager &FMgr = CXXUnit->getFileManager();
2588  const FileEntry *File = FMgr.getFile(file_name, file_name+strlen(file_name),
2589                                       CXXUnit->getFileSystemOpts());
2590  return const_cast<FileEntry *>(File);
2591}
2592
2593} // end: extern "C"
2594
2595//===----------------------------------------------------------------------===//
2596// CXCursor Operations.
2597//===----------------------------------------------------------------------===//
2598
2599static Decl *getDeclFromExpr(Stmt *E) {
2600  if (CastExpr *CE = dyn_cast<CastExpr>(E))
2601    return getDeclFromExpr(CE->getSubExpr());
2602
2603  if (DeclRefExpr *RefExpr = dyn_cast<DeclRefExpr>(E))
2604    return RefExpr->getDecl();
2605  if (BlockDeclRefExpr *RefExpr = dyn_cast<BlockDeclRefExpr>(E))
2606    return RefExpr->getDecl();
2607  if (MemberExpr *ME = dyn_cast<MemberExpr>(E))
2608    return ME->getMemberDecl();
2609  if (ObjCIvarRefExpr *RE = dyn_cast<ObjCIvarRefExpr>(E))
2610    return RE->getDecl();
2611  if (ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(E))
2612    return PRE->getProperty();
2613
2614  if (CallExpr *CE = dyn_cast<CallExpr>(E))
2615    return getDeclFromExpr(CE->getCallee());
2616  if (CXXConstructExpr *CE = llvm::dyn_cast<CXXConstructExpr>(E))
2617    if (!CE->isElidable())
2618    return CE->getConstructor();
2619  if (ObjCMessageExpr *OME = dyn_cast<ObjCMessageExpr>(E))
2620    return OME->getMethodDecl();
2621
2622  if (ObjCProtocolExpr *PE = dyn_cast<ObjCProtocolExpr>(E))
2623    return PE->getProtocol();
2624
2625  return 0;
2626}
2627
2628static SourceLocation getLocationFromExpr(Expr *E) {
2629  if (ObjCMessageExpr *Msg = dyn_cast<ObjCMessageExpr>(E))
2630    return /*FIXME:*/Msg->getLeftLoc();
2631  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
2632    return DRE->getLocation();
2633  if (BlockDeclRefExpr *RefExpr = dyn_cast<BlockDeclRefExpr>(E))
2634    return RefExpr->getLocation();
2635  if (MemberExpr *Member = dyn_cast<MemberExpr>(E))
2636    return Member->getMemberLoc();
2637  if (ObjCIvarRefExpr *Ivar = dyn_cast<ObjCIvarRefExpr>(E))
2638    return Ivar->getLocation();
2639  return E->getLocStart();
2640}
2641
2642extern "C" {
2643
2644unsigned clang_visitChildren(CXCursor parent,
2645                             CXCursorVisitor visitor,
2646                             CXClientData client_data) {
2647  ASTUnit *CXXUnit = getCursorASTUnit(parent);
2648
2649  CursorVisitor CursorVis(CXXUnit, visitor, client_data,
2650                          CXXUnit->getMaxPCHLevel());
2651  return CursorVis.VisitChildren(parent);
2652}
2653
2654#ifndef __has_feature
2655#define __has_feature(x) 0
2656#endif
2657#if __has_feature(blocks)
2658typedef enum CXChildVisitResult
2659     (^CXCursorVisitorBlock)(CXCursor cursor, CXCursor parent);
2660
2661static enum CXChildVisitResult visitWithBlock(CXCursor cursor, CXCursor parent,
2662    CXClientData client_data) {
2663  CXCursorVisitorBlock block = (CXCursorVisitorBlock)client_data;
2664  return block(cursor, parent);
2665}
2666#else
2667// If we are compiled with a compiler that doesn't have native blocks support,
2668// define and call the block manually, so the
2669typedef struct _CXChildVisitResult
2670{
2671	void *isa;
2672	int flags;
2673	int reserved;
2674	enum CXChildVisitResult(*invoke)(struct _CXChildVisitResult*, CXCursor,
2675                                         CXCursor);
2676} *CXCursorVisitorBlock;
2677
2678static enum CXChildVisitResult visitWithBlock(CXCursor cursor, CXCursor parent,
2679    CXClientData client_data) {
2680  CXCursorVisitorBlock block = (CXCursorVisitorBlock)client_data;
2681  return block->invoke(block, cursor, parent);
2682}
2683#endif
2684
2685
2686unsigned clang_visitChildrenWithBlock(CXCursor parent,
2687                                      CXCursorVisitorBlock block) {
2688  return clang_visitChildren(parent, visitWithBlock, block);
2689}
2690
2691static CXString getDeclSpelling(Decl *D) {
2692  NamedDecl *ND = dyn_cast_or_null<NamedDecl>(D);
2693  if (!ND)
2694    return createCXString("");
2695
2696  if (ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(ND))
2697    return createCXString(OMD->getSelector().getAsString());
2698
2699  if (ObjCCategoryImplDecl *CIMP = dyn_cast<ObjCCategoryImplDecl>(ND))
2700    // No, this isn't the same as the code below. getIdentifier() is non-virtual
2701    // and returns different names. NamedDecl returns the class name and
2702    // ObjCCategoryImplDecl returns the category name.
2703    return createCXString(CIMP->getIdentifier()->getNameStart());
2704
2705  if (isa<UsingDirectiveDecl>(D))
2706    return createCXString("");
2707
2708  llvm::SmallString<1024> S;
2709  llvm::raw_svector_ostream os(S);
2710  ND->printName(os);
2711
2712  return createCXString(os.str());
2713}
2714
2715CXString clang_getCursorSpelling(CXCursor C) {
2716  if (clang_isTranslationUnit(C.kind))
2717    return clang_getTranslationUnitSpelling(C.data[2]);
2718
2719  if (clang_isReference(C.kind)) {
2720    switch (C.kind) {
2721    case CXCursor_ObjCSuperClassRef: {
2722      ObjCInterfaceDecl *Super = getCursorObjCSuperClassRef(C).first;
2723      return createCXString(Super->getIdentifier()->getNameStart());
2724    }
2725    case CXCursor_ObjCClassRef: {
2726      ObjCInterfaceDecl *Class = getCursorObjCClassRef(C).first;
2727      return createCXString(Class->getIdentifier()->getNameStart());
2728    }
2729    case CXCursor_ObjCProtocolRef: {
2730      ObjCProtocolDecl *OID = getCursorObjCProtocolRef(C).first;
2731      assert(OID && "getCursorSpelling(): Missing protocol decl");
2732      return createCXString(OID->getIdentifier()->getNameStart());
2733    }
2734    case CXCursor_CXXBaseSpecifier: {
2735      CXXBaseSpecifier *B = getCursorCXXBaseSpecifier(C);
2736      return createCXString(B->getType().getAsString());
2737    }
2738    case CXCursor_TypeRef: {
2739      TypeDecl *Type = getCursorTypeRef(C).first;
2740      assert(Type && "Missing type decl");
2741
2742      return createCXString(getCursorContext(C).getTypeDeclType(Type).
2743                              getAsString());
2744    }
2745    case CXCursor_TemplateRef: {
2746      TemplateDecl *Template = getCursorTemplateRef(C).first;
2747      assert(Template && "Missing template decl");
2748
2749      return createCXString(Template->getNameAsString());
2750    }
2751
2752    case CXCursor_NamespaceRef: {
2753      NamedDecl *NS = getCursorNamespaceRef(C).first;
2754      assert(NS && "Missing namespace decl");
2755
2756      return createCXString(NS->getNameAsString());
2757    }
2758
2759    case CXCursor_MemberRef: {
2760      FieldDecl *Field = getCursorMemberRef(C).first;
2761      assert(Field && "Missing member decl");
2762
2763      return createCXString(Field->getNameAsString());
2764    }
2765
2766    case CXCursor_LabelRef: {
2767      LabelStmt *Label = getCursorLabelRef(C).first;
2768      assert(Label && "Missing label");
2769
2770      return createCXString(Label->getID()->getName());
2771    }
2772
2773    case CXCursor_OverloadedDeclRef: {
2774      OverloadedDeclRefStorage Storage = getCursorOverloadedDeclRef(C).first;
2775      if (Decl *D = Storage.dyn_cast<Decl *>()) {
2776        if (NamedDecl *ND = dyn_cast<NamedDecl>(D))
2777          return createCXString(ND->getNameAsString());
2778        return createCXString("");
2779      }
2780      if (OverloadExpr *E = Storage.dyn_cast<OverloadExpr *>())
2781        return createCXString(E->getName().getAsString());
2782      OverloadedTemplateStorage *Ovl
2783        = Storage.get<OverloadedTemplateStorage*>();
2784      if (Ovl->size() == 0)
2785        return createCXString("");
2786      return createCXString((*Ovl->begin())->getNameAsString());
2787    }
2788
2789    default:
2790      return createCXString("<not implemented>");
2791    }
2792  }
2793
2794  if (clang_isExpression(C.kind)) {
2795    Decl *D = getDeclFromExpr(getCursorExpr(C));
2796    if (D)
2797      return getDeclSpelling(D);
2798    return createCXString("");
2799  }
2800
2801  if (clang_isStatement(C.kind)) {
2802    Stmt *S = getCursorStmt(C);
2803    if (LabelStmt *Label = dyn_cast_or_null<LabelStmt>(S))
2804      return createCXString(Label->getID()->getName());
2805
2806    return createCXString("");
2807  }
2808
2809  if (C.kind == CXCursor_MacroInstantiation)
2810    return createCXString(getCursorMacroInstantiation(C)->getName()
2811                                                           ->getNameStart());
2812
2813  if (C.kind == CXCursor_MacroDefinition)
2814    return createCXString(getCursorMacroDefinition(C)->getName()
2815                                                           ->getNameStart());
2816
2817  if (C.kind == CXCursor_InclusionDirective)
2818    return createCXString(getCursorInclusionDirective(C)->getFileName());
2819
2820  if (clang_isDeclaration(C.kind))
2821    return getDeclSpelling(getCursorDecl(C));
2822
2823  return createCXString("");
2824}
2825
2826CXString clang_getCursorDisplayName(CXCursor C) {
2827  if (!clang_isDeclaration(C.kind))
2828    return clang_getCursorSpelling(C);
2829
2830  Decl *D = getCursorDecl(C);
2831  if (!D)
2832    return createCXString("");
2833
2834  PrintingPolicy &Policy = getCursorContext(C).PrintingPolicy;
2835  if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D))
2836    D = FunTmpl->getTemplatedDecl();
2837
2838  if (FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) {
2839    llvm::SmallString<64> Str;
2840    llvm::raw_svector_ostream OS(Str);
2841    OS << Function->getNameAsString();
2842    if (Function->getPrimaryTemplate())
2843      OS << "<>";
2844    OS << "(";
2845    for (unsigned I = 0, N = Function->getNumParams(); I != N; ++I) {
2846      if (I)
2847        OS << ", ";
2848      OS << Function->getParamDecl(I)->getType().getAsString(Policy);
2849    }
2850
2851    if (Function->isVariadic()) {
2852      if (Function->getNumParams())
2853        OS << ", ";
2854      OS << "...";
2855    }
2856    OS << ")";
2857    return createCXString(OS.str());
2858  }
2859
2860  if (ClassTemplateDecl *ClassTemplate = dyn_cast<ClassTemplateDecl>(D)) {
2861    llvm::SmallString<64> Str;
2862    llvm::raw_svector_ostream OS(Str);
2863    OS << ClassTemplate->getNameAsString();
2864    OS << "<";
2865    TemplateParameterList *Params = ClassTemplate->getTemplateParameters();
2866    for (unsigned I = 0, N = Params->size(); I != N; ++I) {
2867      if (I)
2868        OS << ", ";
2869
2870      NamedDecl *Param = Params->getParam(I);
2871      if (Param->getIdentifier()) {
2872        OS << Param->getIdentifier()->getName();
2873        continue;
2874      }
2875
2876      // There is no parameter name, which makes this tricky. Try to come up
2877      // with something useful that isn't too long.
2878      if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Param))
2879        OS << (TTP->wasDeclaredWithTypename()? "typename" : "class");
2880      else if (NonTypeTemplateParmDecl *NTTP
2881                                    = dyn_cast<NonTypeTemplateParmDecl>(Param))
2882        OS << NTTP->getType().getAsString(Policy);
2883      else
2884        OS << "template<...> class";
2885    }
2886
2887    OS << ">";
2888    return createCXString(OS.str());
2889  }
2890
2891  if (ClassTemplateSpecializationDecl *ClassSpec
2892                              = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
2893    // If the type was explicitly written, use that.
2894    if (TypeSourceInfo *TSInfo = ClassSpec->getTypeAsWritten())
2895      return createCXString(TSInfo->getType().getAsString(Policy));
2896
2897    llvm::SmallString<64> Str;
2898    llvm::raw_svector_ostream OS(Str);
2899    OS << ClassSpec->getNameAsString();
2900    OS << TemplateSpecializationType::PrintTemplateArgumentList(
2901                                      ClassSpec->getTemplateArgs().data(),
2902                                      ClassSpec->getTemplateArgs().size(),
2903                                                                Policy);
2904    return createCXString(OS.str());
2905  }
2906
2907  return clang_getCursorSpelling(C);
2908}
2909
2910CXString clang_getCursorKindSpelling(enum CXCursorKind Kind) {
2911  switch (Kind) {
2912  case CXCursor_FunctionDecl:
2913      return createCXString("FunctionDecl");
2914  case CXCursor_TypedefDecl:
2915      return createCXString("TypedefDecl");
2916  case CXCursor_EnumDecl:
2917      return createCXString("EnumDecl");
2918  case CXCursor_EnumConstantDecl:
2919      return createCXString("EnumConstantDecl");
2920  case CXCursor_StructDecl:
2921      return createCXString("StructDecl");
2922  case CXCursor_UnionDecl:
2923      return createCXString("UnionDecl");
2924  case CXCursor_ClassDecl:
2925      return createCXString("ClassDecl");
2926  case CXCursor_FieldDecl:
2927      return createCXString("FieldDecl");
2928  case CXCursor_VarDecl:
2929      return createCXString("VarDecl");
2930  case CXCursor_ParmDecl:
2931      return createCXString("ParmDecl");
2932  case CXCursor_ObjCInterfaceDecl:
2933      return createCXString("ObjCInterfaceDecl");
2934  case CXCursor_ObjCCategoryDecl:
2935      return createCXString("ObjCCategoryDecl");
2936  case CXCursor_ObjCProtocolDecl:
2937      return createCXString("ObjCProtocolDecl");
2938  case CXCursor_ObjCPropertyDecl:
2939      return createCXString("ObjCPropertyDecl");
2940  case CXCursor_ObjCIvarDecl:
2941      return createCXString("ObjCIvarDecl");
2942  case CXCursor_ObjCInstanceMethodDecl:
2943      return createCXString("ObjCInstanceMethodDecl");
2944  case CXCursor_ObjCClassMethodDecl:
2945      return createCXString("ObjCClassMethodDecl");
2946  case CXCursor_ObjCImplementationDecl:
2947      return createCXString("ObjCImplementationDecl");
2948  case CXCursor_ObjCCategoryImplDecl:
2949      return createCXString("ObjCCategoryImplDecl");
2950  case CXCursor_CXXMethod:
2951      return createCXString("CXXMethod");
2952  case CXCursor_UnexposedDecl:
2953      return createCXString("UnexposedDecl");
2954  case CXCursor_ObjCSuperClassRef:
2955      return createCXString("ObjCSuperClassRef");
2956  case CXCursor_ObjCProtocolRef:
2957      return createCXString("ObjCProtocolRef");
2958  case CXCursor_ObjCClassRef:
2959      return createCXString("ObjCClassRef");
2960  case CXCursor_TypeRef:
2961      return createCXString("TypeRef");
2962  case CXCursor_TemplateRef:
2963      return createCXString("TemplateRef");
2964  case CXCursor_NamespaceRef:
2965    return createCXString("NamespaceRef");
2966  case CXCursor_MemberRef:
2967    return createCXString("MemberRef");
2968  case CXCursor_LabelRef:
2969    return createCXString("LabelRef");
2970  case CXCursor_OverloadedDeclRef:
2971    return createCXString("OverloadedDeclRef");
2972  case CXCursor_UnexposedExpr:
2973      return createCXString("UnexposedExpr");
2974  case CXCursor_BlockExpr:
2975      return createCXString("BlockExpr");
2976  case CXCursor_DeclRefExpr:
2977      return createCXString("DeclRefExpr");
2978  case CXCursor_MemberRefExpr:
2979      return createCXString("MemberRefExpr");
2980  case CXCursor_CallExpr:
2981      return createCXString("CallExpr");
2982  case CXCursor_ObjCMessageExpr:
2983      return createCXString("ObjCMessageExpr");
2984  case CXCursor_UnexposedStmt:
2985      return createCXString("UnexposedStmt");
2986  case CXCursor_LabelStmt:
2987      return createCXString("LabelStmt");
2988  case CXCursor_InvalidFile:
2989      return createCXString("InvalidFile");
2990  case CXCursor_InvalidCode:
2991    return createCXString("InvalidCode");
2992  case CXCursor_NoDeclFound:
2993      return createCXString("NoDeclFound");
2994  case CXCursor_NotImplemented:
2995      return createCXString("NotImplemented");
2996  case CXCursor_TranslationUnit:
2997      return createCXString("TranslationUnit");
2998  case CXCursor_UnexposedAttr:
2999      return createCXString("UnexposedAttr");
3000  case CXCursor_IBActionAttr:
3001      return createCXString("attribute(ibaction)");
3002  case CXCursor_IBOutletAttr:
3003     return createCXString("attribute(iboutlet)");
3004  case CXCursor_IBOutletCollectionAttr:
3005      return createCXString("attribute(iboutletcollection)");
3006  case CXCursor_PreprocessingDirective:
3007    return createCXString("preprocessing directive");
3008  case CXCursor_MacroDefinition:
3009    return createCXString("macro definition");
3010  case CXCursor_MacroInstantiation:
3011    return createCXString("macro instantiation");
3012  case CXCursor_InclusionDirective:
3013    return createCXString("inclusion directive");
3014  case CXCursor_Namespace:
3015    return createCXString("Namespace");
3016  case CXCursor_LinkageSpec:
3017    return createCXString("LinkageSpec");
3018  case CXCursor_CXXBaseSpecifier:
3019    return createCXString("C++ base class specifier");
3020  case CXCursor_Constructor:
3021    return createCXString("CXXConstructor");
3022  case CXCursor_Destructor:
3023    return createCXString("CXXDestructor");
3024  case CXCursor_ConversionFunction:
3025    return createCXString("CXXConversion");
3026  case CXCursor_TemplateTypeParameter:
3027    return createCXString("TemplateTypeParameter");
3028  case CXCursor_NonTypeTemplateParameter:
3029    return createCXString("NonTypeTemplateParameter");
3030  case CXCursor_TemplateTemplateParameter:
3031    return createCXString("TemplateTemplateParameter");
3032  case CXCursor_FunctionTemplate:
3033    return createCXString("FunctionTemplate");
3034  case CXCursor_ClassTemplate:
3035    return createCXString("ClassTemplate");
3036  case CXCursor_ClassTemplatePartialSpecialization:
3037    return createCXString("ClassTemplatePartialSpecialization");
3038  case CXCursor_NamespaceAlias:
3039    return createCXString("NamespaceAlias");
3040  case CXCursor_UsingDirective:
3041    return createCXString("UsingDirective");
3042  case CXCursor_UsingDeclaration:
3043    return createCXString("UsingDeclaration");
3044  }
3045
3046  llvm_unreachable("Unhandled CXCursorKind");
3047  return createCXString(NULL);
3048}
3049
3050enum CXChildVisitResult GetCursorVisitor(CXCursor cursor,
3051                                         CXCursor parent,
3052                                         CXClientData client_data) {
3053  CXCursor *BestCursor = static_cast<CXCursor *>(client_data);
3054
3055  // If our current best cursor is the construction of a temporary object,
3056  // don't replace that cursor with a type reference, because we want
3057  // clang_getCursor() to point at the constructor.
3058  if (clang_isExpression(BestCursor->kind) &&
3059      isa<CXXTemporaryObjectExpr>(getCursorExpr(*BestCursor)) &&
3060      cursor.kind == CXCursor_TypeRef)
3061    return CXChildVisit_Recurse;
3062
3063  *BestCursor = cursor;
3064  return CXChildVisit_Recurse;
3065}
3066
3067CXCursor clang_getCursor(CXTranslationUnit TU, CXSourceLocation Loc) {
3068  if (!TU)
3069    return clang_getNullCursor();
3070
3071  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
3072  ASTUnit::ConcurrencyCheck Check(*CXXUnit);
3073
3074  // Translate the given source location to make it point at the beginning of
3075  // the token under the cursor.
3076  SourceLocation SLoc = cxloc::translateSourceLocation(Loc);
3077
3078  // Guard against an invalid SourceLocation, or we may assert in one
3079  // of the following calls.
3080  if (SLoc.isInvalid())
3081    return clang_getNullCursor();
3082
3083  bool Logging = getenv("LIBCLANG_LOGGING");
3084  SLoc = Lexer::GetBeginningOfToken(SLoc, CXXUnit->getSourceManager(),
3085                                    CXXUnit->getASTContext().getLangOptions());
3086
3087  CXCursor Result = MakeCXCursorInvalid(CXCursor_NoDeclFound);
3088  if (SLoc.isValid()) {
3089    // FIXME: Would be great to have a "hint" cursor, then walk from that
3090    // hint cursor upward until we find a cursor whose source range encloses
3091    // the region of interest, rather than starting from the translation unit.
3092    CXCursor Parent = clang_getTranslationUnitCursor(CXXUnit);
3093    CursorVisitor CursorVis(CXXUnit, GetCursorVisitor, &Result,
3094                            Decl::MaxPCHLevel, SourceLocation(SLoc));
3095    CursorVis.VisitChildren(Parent);
3096  }
3097
3098  if (Logging) {
3099    CXFile SearchFile;
3100    unsigned SearchLine, SearchColumn;
3101    CXFile ResultFile;
3102    unsigned ResultLine, ResultColumn;
3103    CXString SearchFileName, ResultFileName, KindSpelling;
3104    CXSourceLocation ResultLoc = clang_getCursorLocation(Result);
3105
3106    clang_getInstantiationLocation(Loc, &SearchFile, &SearchLine, &SearchColumn,
3107                                   0);
3108    clang_getInstantiationLocation(ResultLoc, &ResultFile, &ResultLine,
3109                                   &ResultColumn, 0);
3110    SearchFileName = clang_getFileName(SearchFile);
3111    ResultFileName = clang_getFileName(ResultFile);
3112    KindSpelling = clang_getCursorKindSpelling(Result.kind);
3113    fprintf(stderr, "clang_getCursor(%s:%d:%d) = %s(%s:%d:%d)\n",
3114            clang_getCString(SearchFileName), SearchLine, SearchColumn,
3115            clang_getCString(KindSpelling),
3116            clang_getCString(ResultFileName), ResultLine, ResultColumn);
3117    clang_disposeString(SearchFileName);
3118    clang_disposeString(ResultFileName);
3119    clang_disposeString(KindSpelling);
3120  }
3121
3122  return Result;
3123}
3124
3125CXCursor clang_getNullCursor(void) {
3126  return MakeCXCursorInvalid(CXCursor_InvalidFile);
3127}
3128
3129unsigned clang_equalCursors(CXCursor X, CXCursor Y) {
3130  return X == Y;
3131}
3132
3133unsigned clang_isInvalid(enum CXCursorKind K) {
3134  return K >= CXCursor_FirstInvalid && K <= CXCursor_LastInvalid;
3135}
3136
3137unsigned clang_isDeclaration(enum CXCursorKind K) {
3138  return K >= CXCursor_FirstDecl && K <= CXCursor_LastDecl;
3139}
3140
3141unsigned clang_isReference(enum CXCursorKind K) {
3142  return K >= CXCursor_FirstRef && K <= CXCursor_LastRef;
3143}
3144
3145unsigned clang_isExpression(enum CXCursorKind K) {
3146  return K >= CXCursor_FirstExpr && K <= CXCursor_LastExpr;
3147}
3148
3149unsigned clang_isStatement(enum CXCursorKind K) {
3150  return K >= CXCursor_FirstStmt && K <= CXCursor_LastStmt;
3151}
3152
3153unsigned clang_isTranslationUnit(enum CXCursorKind K) {
3154  return K == CXCursor_TranslationUnit;
3155}
3156
3157unsigned clang_isPreprocessing(enum CXCursorKind K) {
3158  return K >= CXCursor_FirstPreprocessing && K <= CXCursor_LastPreprocessing;
3159}
3160
3161unsigned clang_isUnexposed(enum CXCursorKind K) {
3162  switch (K) {
3163    case CXCursor_UnexposedDecl:
3164    case CXCursor_UnexposedExpr:
3165    case CXCursor_UnexposedStmt:
3166    case CXCursor_UnexposedAttr:
3167      return true;
3168    default:
3169      return false;
3170  }
3171}
3172
3173CXCursorKind clang_getCursorKind(CXCursor C) {
3174  return C.kind;
3175}
3176
3177CXSourceLocation clang_getCursorLocation(CXCursor C) {
3178  if (clang_isReference(C.kind)) {
3179    switch (C.kind) {
3180    case CXCursor_ObjCSuperClassRef: {
3181      std::pair<ObjCInterfaceDecl *, SourceLocation> P
3182        = getCursorObjCSuperClassRef(C);
3183      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3184    }
3185
3186    case CXCursor_ObjCProtocolRef: {
3187      std::pair<ObjCProtocolDecl *, SourceLocation> P
3188        = getCursorObjCProtocolRef(C);
3189      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3190    }
3191
3192    case CXCursor_ObjCClassRef: {
3193      std::pair<ObjCInterfaceDecl *, SourceLocation> P
3194        = getCursorObjCClassRef(C);
3195      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3196    }
3197
3198    case CXCursor_TypeRef: {
3199      std::pair<TypeDecl *, SourceLocation> P = getCursorTypeRef(C);
3200      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3201    }
3202
3203    case CXCursor_TemplateRef: {
3204      std::pair<TemplateDecl *, SourceLocation> P = getCursorTemplateRef(C);
3205      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3206    }
3207
3208    case CXCursor_NamespaceRef: {
3209      std::pair<NamedDecl *, SourceLocation> P = getCursorNamespaceRef(C);
3210      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3211    }
3212
3213    case CXCursor_MemberRef: {
3214      std::pair<FieldDecl *, SourceLocation> P = getCursorMemberRef(C);
3215      return cxloc::translateSourceLocation(P.first->getASTContext(), P.second);
3216    }
3217
3218    case CXCursor_CXXBaseSpecifier: {
3219      CXXBaseSpecifier *BaseSpec = getCursorCXXBaseSpecifier(C);
3220      if (!BaseSpec)
3221        return clang_getNullLocation();
3222
3223      if (TypeSourceInfo *TSInfo = BaseSpec->getTypeSourceInfo())
3224        return cxloc::translateSourceLocation(getCursorContext(C),
3225                                            TSInfo->getTypeLoc().getBeginLoc());
3226
3227      return cxloc::translateSourceLocation(getCursorContext(C),
3228                                        BaseSpec->getSourceRange().getBegin());
3229    }
3230
3231    case CXCursor_LabelRef: {
3232      std::pair<LabelStmt *, SourceLocation> P = getCursorLabelRef(C);
3233      return cxloc::translateSourceLocation(getCursorContext(C), P.second);
3234    }
3235
3236    case CXCursor_OverloadedDeclRef:
3237      return cxloc::translateSourceLocation(getCursorContext(C),
3238                                          getCursorOverloadedDeclRef(C).second);
3239
3240    default:
3241      // FIXME: Need a way to enumerate all non-reference cases.
3242      llvm_unreachable("Missed a reference kind");
3243    }
3244  }
3245
3246  if (clang_isExpression(C.kind))
3247    return cxloc::translateSourceLocation(getCursorContext(C),
3248                                   getLocationFromExpr(getCursorExpr(C)));
3249
3250  if (clang_isStatement(C.kind))
3251    return cxloc::translateSourceLocation(getCursorContext(C),
3252                                          getCursorStmt(C)->getLocStart());
3253
3254  if (C.kind == CXCursor_PreprocessingDirective) {
3255    SourceLocation L = cxcursor::getCursorPreprocessingDirective(C).getBegin();
3256    return cxloc::translateSourceLocation(getCursorContext(C), L);
3257  }
3258
3259  if (C.kind == CXCursor_MacroInstantiation) {
3260    SourceLocation L
3261      = cxcursor::getCursorMacroInstantiation(C)->getSourceRange().getBegin();
3262    return cxloc::translateSourceLocation(getCursorContext(C), L);
3263  }
3264
3265  if (C.kind == CXCursor_MacroDefinition) {
3266    SourceLocation L = cxcursor::getCursorMacroDefinition(C)->getLocation();
3267    return cxloc::translateSourceLocation(getCursorContext(C), L);
3268  }
3269
3270  if (C.kind == CXCursor_InclusionDirective) {
3271    SourceLocation L
3272      = cxcursor::getCursorInclusionDirective(C)->getSourceRange().getBegin();
3273    return cxloc::translateSourceLocation(getCursorContext(C), L);
3274  }
3275
3276  if (C.kind < CXCursor_FirstDecl || C.kind > CXCursor_LastDecl)
3277    return clang_getNullLocation();
3278
3279  Decl *D = getCursorDecl(C);
3280  SourceLocation Loc = D->getLocation();
3281  if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(D))
3282    Loc = Class->getClassLoc();
3283  // FIXME: Multiple variables declared in a single declaration
3284  // currently lack the information needed to correctly determine their
3285  // ranges when accounting for the type-specifier.  We use context
3286  // stored in the CXCursor to determine if the VarDecl is in a DeclGroup,
3287  // and if so, whether it is the first decl.
3288  if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
3289    if (!cxcursor::isFirstInDeclGroup(C))
3290      Loc = VD->getLocation();
3291  }
3292
3293  return cxloc::translateSourceLocation(getCursorContext(C), Loc);
3294}
3295
3296} // end extern "C"
3297
3298static SourceRange getRawCursorExtent(CXCursor C) {
3299  if (clang_isReference(C.kind)) {
3300    switch (C.kind) {
3301    case CXCursor_ObjCSuperClassRef:
3302      return  getCursorObjCSuperClassRef(C).second;
3303
3304    case CXCursor_ObjCProtocolRef:
3305      return getCursorObjCProtocolRef(C).second;
3306
3307    case CXCursor_ObjCClassRef:
3308      return getCursorObjCClassRef(C).second;
3309
3310    case CXCursor_TypeRef:
3311      return getCursorTypeRef(C).second;
3312
3313    case CXCursor_TemplateRef:
3314      return getCursorTemplateRef(C).second;
3315
3316    case CXCursor_NamespaceRef:
3317      return getCursorNamespaceRef(C).second;
3318
3319    case CXCursor_MemberRef:
3320      return getCursorMemberRef(C).second;
3321
3322    case CXCursor_CXXBaseSpecifier:
3323      return getCursorCXXBaseSpecifier(C)->getSourceRange();
3324
3325    case CXCursor_LabelRef:
3326      return getCursorLabelRef(C).second;
3327
3328    case CXCursor_OverloadedDeclRef:
3329      return getCursorOverloadedDeclRef(C).second;
3330
3331    default:
3332      // FIXME: Need a way to enumerate all non-reference cases.
3333      llvm_unreachable("Missed a reference kind");
3334    }
3335  }
3336
3337  if (clang_isExpression(C.kind))
3338    return getCursorExpr(C)->getSourceRange();
3339
3340  if (clang_isStatement(C.kind))
3341    return getCursorStmt(C)->getSourceRange();
3342
3343  if (C.kind == CXCursor_PreprocessingDirective)
3344    return cxcursor::getCursorPreprocessingDirective(C);
3345
3346  if (C.kind == CXCursor_MacroInstantiation)
3347    return cxcursor::getCursorMacroInstantiation(C)->getSourceRange();
3348
3349  if (C.kind == CXCursor_MacroDefinition)
3350    return cxcursor::getCursorMacroDefinition(C)->getSourceRange();
3351
3352  if (C.kind == CXCursor_InclusionDirective)
3353    return cxcursor::getCursorInclusionDirective(C)->getSourceRange();
3354
3355  if (C.kind >= CXCursor_FirstDecl && C.kind <= CXCursor_LastDecl) {
3356    Decl *D = cxcursor::getCursorDecl(C);
3357    SourceRange R = D->getSourceRange();
3358    // FIXME: Multiple variables declared in a single declaration
3359    // currently lack the information needed to correctly determine their
3360    // ranges when accounting for the type-specifier.  We use context
3361    // stored in the CXCursor to determine if the VarDecl is in a DeclGroup,
3362    // and if so, whether it is the first decl.
3363    if (VarDecl *VD = dyn_cast<VarDecl>(D)) {
3364      if (!cxcursor::isFirstInDeclGroup(C))
3365        R.setBegin(VD->getLocation());
3366    }
3367    return R;
3368  }
3369  return SourceRange();}
3370
3371extern "C" {
3372
3373CXSourceRange clang_getCursorExtent(CXCursor C) {
3374  SourceRange R = getRawCursorExtent(C);
3375  if (R.isInvalid())
3376    return clang_getNullRange();
3377
3378  return cxloc::translateSourceRange(getCursorContext(C), R);
3379}
3380
3381CXCursor clang_getCursorReferenced(CXCursor C) {
3382  if (clang_isInvalid(C.kind))
3383    return clang_getNullCursor();
3384
3385  ASTUnit *CXXUnit = getCursorASTUnit(C);
3386  if (clang_isDeclaration(C.kind)) {
3387    Decl *D = getCursorDecl(C);
3388    if (UsingDecl *Using = dyn_cast<UsingDecl>(D))
3389      return MakeCursorOverloadedDeclRef(Using, D->getLocation(), CXXUnit);
3390    if (ObjCClassDecl *Classes = dyn_cast<ObjCClassDecl>(D))
3391      return MakeCursorOverloadedDeclRef(Classes, D->getLocation(), CXXUnit);
3392    if (ObjCForwardProtocolDecl *Protocols
3393                                        = dyn_cast<ObjCForwardProtocolDecl>(D))
3394      return MakeCursorOverloadedDeclRef(Protocols, D->getLocation(), CXXUnit);
3395
3396    return C;
3397  }
3398
3399  if (clang_isExpression(C.kind)) {
3400    Expr *E = getCursorExpr(C);
3401    Decl *D = getDeclFromExpr(E);
3402    if (D)
3403      return MakeCXCursor(D, CXXUnit);
3404
3405    if (OverloadExpr *Ovl = dyn_cast_or_null<OverloadExpr>(E))
3406      return MakeCursorOverloadedDeclRef(Ovl, CXXUnit);
3407
3408    return clang_getNullCursor();
3409  }
3410
3411  if (clang_isStatement(C.kind)) {
3412    Stmt *S = getCursorStmt(C);
3413    if (GotoStmt *Goto = dyn_cast_or_null<GotoStmt>(S))
3414      return MakeCXCursor(Goto->getLabel(), getCursorDecl(C),
3415                          getCursorASTUnit(C));
3416
3417    return clang_getNullCursor();
3418  }
3419
3420  if (C.kind == CXCursor_MacroInstantiation) {
3421    if (MacroDefinition *Def = getCursorMacroInstantiation(C)->getDefinition())
3422      return MakeMacroDefinitionCursor(Def, CXXUnit);
3423  }
3424
3425  if (!clang_isReference(C.kind))
3426    return clang_getNullCursor();
3427
3428  switch (C.kind) {
3429    case CXCursor_ObjCSuperClassRef:
3430      return MakeCXCursor(getCursorObjCSuperClassRef(C).first, CXXUnit);
3431
3432    case CXCursor_ObjCProtocolRef: {
3433      return MakeCXCursor(getCursorObjCProtocolRef(C).first, CXXUnit);
3434
3435    case CXCursor_ObjCClassRef:
3436      return MakeCXCursor(getCursorObjCClassRef(C).first, CXXUnit);
3437
3438    case CXCursor_TypeRef:
3439      return MakeCXCursor(getCursorTypeRef(C).first, CXXUnit);
3440
3441    case CXCursor_TemplateRef:
3442      return MakeCXCursor(getCursorTemplateRef(C).first, CXXUnit);
3443
3444    case CXCursor_NamespaceRef:
3445      return MakeCXCursor(getCursorNamespaceRef(C).first, CXXUnit);
3446
3447    case CXCursor_MemberRef:
3448      return MakeCXCursor(getCursorMemberRef(C).first, CXXUnit);
3449
3450    case CXCursor_CXXBaseSpecifier: {
3451      CXXBaseSpecifier *B = cxcursor::getCursorCXXBaseSpecifier(C);
3452      return clang_getTypeDeclaration(cxtype::MakeCXType(B->getType(),
3453                                                         CXXUnit));
3454    }
3455
3456    case CXCursor_LabelRef:
3457      // FIXME: We end up faking the "parent" declaration here because we
3458      // don't want to make CXCursor larger.
3459      return MakeCXCursor(getCursorLabelRef(C).first,
3460                          CXXUnit->getASTContext().getTranslationUnitDecl(),
3461                          CXXUnit);
3462
3463    case CXCursor_OverloadedDeclRef:
3464      return C;
3465
3466    default:
3467      // We would prefer to enumerate all non-reference cursor kinds here.
3468      llvm_unreachable("Unhandled reference cursor kind");
3469      break;
3470    }
3471  }
3472
3473  return clang_getNullCursor();
3474}
3475
3476CXCursor clang_getCursorDefinition(CXCursor C) {
3477  if (clang_isInvalid(C.kind))
3478    return clang_getNullCursor();
3479
3480  ASTUnit *CXXUnit = getCursorASTUnit(C);
3481
3482  bool WasReference = false;
3483  if (clang_isReference(C.kind) || clang_isExpression(C.kind)) {
3484    C = clang_getCursorReferenced(C);
3485    WasReference = true;
3486  }
3487
3488  if (C.kind == CXCursor_MacroInstantiation)
3489    return clang_getCursorReferenced(C);
3490
3491  if (!clang_isDeclaration(C.kind))
3492    return clang_getNullCursor();
3493
3494  Decl *D = getCursorDecl(C);
3495  if (!D)
3496    return clang_getNullCursor();
3497
3498  switch (D->getKind()) {
3499  // Declaration kinds that don't really separate the notions of
3500  // declaration and definition.
3501  case Decl::Namespace:
3502  case Decl::Typedef:
3503  case Decl::TemplateTypeParm:
3504  case Decl::EnumConstant:
3505  case Decl::Field:
3506  case Decl::ObjCIvar:
3507  case Decl::ObjCAtDefsField:
3508  case Decl::ImplicitParam:
3509  case Decl::ParmVar:
3510  case Decl::NonTypeTemplateParm:
3511  case Decl::TemplateTemplateParm:
3512  case Decl::ObjCCategoryImpl:
3513  case Decl::ObjCImplementation:
3514  case Decl::AccessSpec:
3515  case Decl::LinkageSpec:
3516  case Decl::ObjCPropertyImpl:
3517  case Decl::FileScopeAsm:
3518  case Decl::StaticAssert:
3519  case Decl::Block:
3520    return C;
3521
3522  // Declaration kinds that don't make any sense here, but are
3523  // nonetheless harmless.
3524  case Decl::TranslationUnit:
3525    break;
3526
3527  // Declaration kinds for which the definition is not resolvable.
3528  case Decl::UnresolvedUsingTypename:
3529  case Decl::UnresolvedUsingValue:
3530    break;
3531
3532  case Decl::UsingDirective:
3533    return MakeCXCursor(cast<UsingDirectiveDecl>(D)->getNominatedNamespace(),
3534                        CXXUnit);
3535
3536  case Decl::NamespaceAlias:
3537    return MakeCXCursor(cast<NamespaceAliasDecl>(D)->getNamespace(), CXXUnit);
3538
3539  case Decl::Enum:
3540  case Decl::Record:
3541  case Decl::CXXRecord:
3542  case Decl::ClassTemplateSpecialization:
3543  case Decl::ClassTemplatePartialSpecialization:
3544    if (TagDecl *Def = cast<TagDecl>(D)->getDefinition())
3545      return MakeCXCursor(Def, CXXUnit);
3546    return clang_getNullCursor();
3547
3548  case Decl::Function:
3549  case Decl::CXXMethod:
3550  case Decl::CXXConstructor:
3551  case Decl::CXXDestructor:
3552  case Decl::CXXConversion: {
3553    const FunctionDecl *Def = 0;
3554    if (cast<FunctionDecl>(D)->getBody(Def))
3555      return MakeCXCursor(const_cast<FunctionDecl *>(Def), CXXUnit);
3556    return clang_getNullCursor();
3557  }
3558
3559  case Decl::Var: {
3560    // Ask the variable if it has a definition.
3561    if (VarDecl *Def = cast<VarDecl>(D)->getDefinition())
3562      return MakeCXCursor(Def, CXXUnit);
3563    return clang_getNullCursor();
3564  }
3565
3566  case Decl::FunctionTemplate: {
3567    const FunctionDecl *Def = 0;
3568    if (cast<FunctionTemplateDecl>(D)->getTemplatedDecl()->getBody(Def))
3569      return MakeCXCursor(Def->getDescribedFunctionTemplate(), CXXUnit);
3570    return clang_getNullCursor();
3571  }
3572
3573  case Decl::ClassTemplate: {
3574    if (RecordDecl *Def = cast<ClassTemplateDecl>(D)->getTemplatedDecl()
3575                                                            ->getDefinition())
3576      return MakeCXCursor(cast<CXXRecordDecl>(Def)->getDescribedClassTemplate(),
3577                          CXXUnit);
3578    return clang_getNullCursor();
3579  }
3580
3581  case Decl::Using:
3582    return MakeCursorOverloadedDeclRef(cast<UsingDecl>(D),
3583                                       D->getLocation(), CXXUnit);
3584
3585  case Decl::UsingShadow:
3586    return clang_getCursorDefinition(
3587                       MakeCXCursor(cast<UsingShadowDecl>(D)->getTargetDecl(),
3588                                    CXXUnit));
3589
3590  case Decl::ObjCMethod: {
3591    ObjCMethodDecl *Method = cast<ObjCMethodDecl>(D);
3592    if (Method->isThisDeclarationADefinition())
3593      return C;
3594
3595    // Dig out the method definition in the associated
3596    // @implementation, if we have it.
3597    // FIXME: The ASTs should make finding the definition easier.
3598    if (ObjCInterfaceDecl *Class
3599                       = dyn_cast<ObjCInterfaceDecl>(Method->getDeclContext()))
3600      if (ObjCImplementationDecl *ClassImpl = Class->getImplementation())
3601        if (ObjCMethodDecl *Def = ClassImpl->getMethod(Method->getSelector(),
3602                                                  Method->isInstanceMethod()))
3603          if (Def->isThisDeclarationADefinition())
3604            return MakeCXCursor(Def, CXXUnit);
3605
3606    return clang_getNullCursor();
3607  }
3608
3609  case Decl::ObjCCategory:
3610    if (ObjCCategoryImplDecl *Impl
3611                               = cast<ObjCCategoryDecl>(D)->getImplementation())
3612      return MakeCXCursor(Impl, CXXUnit);
3613    return clang_getNullCursor();
3614
3615  case Decl::ObjCProtocol:
3616    if (!cast<ObjCProtocolDecl>(D)->isForwardDecl())
3617      return C;
3618    return clang_getNullCursor();
3619
3620  case Decl::ObjCInterface:
3621    // There are two notions of a "definition" for an Objective-C
3622    // class: the interface and its implementation. When we resolved a
3623    // reference to an Objective-C class, produce the @interface as
3624    // the definition; when we were provided with the interface,
3625    // produce the @implementation as the definition.
3626    if (WasReference) {
3627      if (!cast<ObjCInterfaceDecl>(D)->isForwardDecl())
3628        return C;
3629    } else if (ObjCImplementationDecl *Impl
3630                              = cast<ObjCInterfaceDecl>(D)->getImplementation())
3631      return MakeCXCursor(Impl, CXXUnit);
3632    return clang_getNullCursor();
3633
3634  case Decl::ObjCProperty:
3635    // FIXME: We don't really know where to find the
3636    // ObjCPropertyImplDecls that implement this property.
3637    return clang_getNullCursor();
3638
3639  case Decl::ObjCCompatibleAlias:
3640    if (ObjCInterfaceDecl *Class
3641          = cast<ObjCCompatibleAliasDecl>(D)->getClassInterface())
3642      if (!Class->isForwardDecl())
3643        return MakeCXCursor(Class, CXXUnit);
3644
3645    return clang_getNullCursor();
3646
3647  case Decl::ObjCForwardProtocol:
3648    return MakeCursorOverloadedDeclRef(cast<ObjCForwardProtocolDecl>(D),
3649                                       D->getLocation(), CXXUnit);
3650
3651  case Decl::ObjCClass:
3652    return MakeCursorOverloadedDeclRef(cast<ObjCClassDecl>(D), D->getLocation(),
3653                                       CXXUnit);
3654
3655  case Decl::Friend:
3656    if (NamedDecl *Friend = cast<FriendDecl>(D)->getFriendDecl())
3657      return clang_getCursorDefinition(MakeCXCursor(Friend, CXXUnit));
3658    return clang_getNullCursor();
3659
3660  case Decl::FriendTemplate:
3661    if (NamedDecl *Friend = cast<FriendTemplateDecl>(D)->getFriendDecl())
3662      return clang_getCursorDefinition(MakeCXCursor(Friend, CXXUnit));
3663    return clang_getNullCursor();
3664  }
3665
3666  return clang_getNullCursor();
3667}
3668
3669unsigned clang_isCursorDefinition(CXCursor C) {
3670  if (!clang_isDeclaration(C.kind))
3671    return 0;
3672
3673  return clang_getCursorDefinition(C) == C;
3674}
3675
3676unsigned clang_getNumOverloadedDecls(CXCursor C) {
3677  if (C.kind != CXCursor_OverloadedDeclRef)
3678    return 0;
3679
3680  OverloadedDeclRefStorage Storage = getCursorOverloadedDeclRef(C).first;
3681  if (OverloadExpr *E = Storage.dyn_cast<OverloadExpr *>())
3682    return E->getNumDecls();
3683
3684  if (OverloadedTemplateStorage *S
3685                              = Storage.dyn_cast<OverloadedTemplateStorage*>())
3686    return S->size();
3687
3688  Decl *D = Storage.get<Decl*>();
3689  if (UsingDecl *Using = dyn_cast<UsingDecl>(D))
3690    return Using->shadow_size();
3691  if (ObjCClassDecl *Classes = dyn_cast<ObjCClassDecl>(D))
3692    return Classes->size();
3693  if (ObjCForwardProtocolDecl *Protocols =dyn_cast<ObjCForwardProtocolDecl>(D))
3694    return Protocols->protocol_size();
3695
3696  return 0;
3697}
3698
3699CXCursor clang_getOverloadedDecl(CXCursor cursor, unsigned index) {
3700  if (cursor.kind != CXCursor_OverloadedDeclRef)
3701    return clang_getNullCursor();
3702
3703  if (index >= clang_getNumOverloadedDecls(cursor))
3704    return clang_getNullCursor();
3705
3706  ASTUnit *Unit = getCursorASTUnit(cursor);
3707  OverloadedDeclRefStorage Storage = getCursorOverloadedDeclRef(cursor).first;
3708  if (OverloadExpr *E = Storage.dyn_cast<OverloadExpr *>())
3709    return MakeCXCursor(E->decls_begin()[index], Unit);
3710
3711  if (OverloadedTemplateStorage *S
3712                              = Storage.dyn_cast<OverloadedTemplateStorage*>())
3713    return MakeCXCursor(S->begin()[index], Unit);
3714
3715  Decl *D = Storage.get<Decl*>();
3716  if (UsingDecl *Using = dyn_cast<UsingDecl>(D)) {
3717    // FIXME: This is, unfortunately, linear time.
3718    UsingDecl::shadow_iterator Pos = Using->shadow_begin();
3719    std::advance(Pos, index);
3720    return MakeCXCursor(cast<UsingShadowDecl>(*Pos)->getTargetDecl(), Unit);
3721  }
3722
3723  if (ObjCClassDecl *Classes = dyn_cast<ObjCClassDecl>(D))
3724    return MakeCXCursor(Classes->begin()[index].getInterface(), Unit);
3725
3726  if (ObjCForwardProtocolDecl *Protocols = dyn_cast<ObjCForwardProtocolDecl>(D))
3727    return MakeCXCursor(Protocols->protocol_begin()[index], Unit);
3728
3729  return clang_getNullCursor();
3730}
3731
3732void clang_getDefinitionSpellingAndExtent(CXCursor C,
3733                                          const char **startBuf,
3734                                          const char **endBuf,
3735                                          unsigned *startLine,
3736                                          unsigned *startColumn,
3737                                          unsigned *endLine,
3738                                          unsigned *endColumn) {
3739  assert(getCursorDecl(C) && "CXCursor has null decl");
3740  NamedDecl *ND = static_cast<NamedDecl *>(getCursorDecl(C));
3741  FunctionDecl *FD = dyn_cast<FunctionDecl>(ND);
3742  CompoundStmt *Body = dyn_cast<CompoundStmt>(FD->getBody());
3743
3744  SourceManager &SM = FD->getASTContext().getSourceManager();
3745  *startBuf = SM.getCharacterData(Body->getLBracLoc());
3746  *endBuf = SM.getCharacterData(Body->getRBracLoc());
3747  *startLine = SM.getSpellingLineNumber(Body->getLBracLoc());
3748  *startColumn = SM.getSpellingColumnNumber(Body->getLBracLoc());
3749  *endLine = SM.getSpellingLineNumber(Body->getRBracLoc());
3750  *endColumn = SM.getSpellingColumnNumber(Body->getRBracLoc());
3751}
3752
3753void clang_enableStackTraces(void) {
3754  llvm::sys::PrintStackTraceOnErrorSignal();
3755}
3756
3757void clang_executeOnThread(void (*fn)(void*), void *user_data,
3758                           unsigned stack_size) {
3759  llvm::llvm_execute_on_thread(fn, user_data, stack_size);
3760}
3761
3762} // end: extern "C"
3763
3764//===----------------------------------------------------------------------===//
3765// Token-based Operations.
3766//===----------------------------------------------------------------------===//
3767
3768/* CXToken layout:
3769 *   int_data[0]: a CXTokenKind
3770 *   int_data[1]: starting token location
3771 *   int_data[2]: token length
3772 *   int_data[3]: reserved
3773 *   ptr_data: for identifiers and keywords, an IdentifierInfo*.
3774 *   otherwise unused.
3775 */
3776extern "C" {
3777
3778CXTokenKind clang_getTokenKind(CXToken CXTok) {
3779  return static_cast<CXTokenKind>(CXTok.int_data[0]);
3780}
3781
3782CXString clang_getTokenSpelling(CXTranslationUnit TU, CXToken CXTok) {
3783  switch (clang_getTokenKind(CXTok)) {
3784  case CXToken_Identifier:
3785  case CXToken_Keyword:
3786    // We know we have an IdentifierInfo*, so use that.
3787    return createCXString(static_cast<IdentifierInfo *>(CXTok.ptr_data)
3788                            ->getNameStart());
3789
3790  case CXToken_Literal: {
3791    // We have stashed the starting pointer in the ptr_data field. Use it.
3792    const char *Text = static_cast<const char *>(CXTok.ptr_data);
3793    return createCXString(llvm::StringRef(Text, CXTok.int_data[2]));
3794  }
3795
3796  case CXToken_Punctuation:
3797  case CXToken_Comment:
3798    break;
3799  }
3800
3801  // We have to find the starting buffer pointer the hard way, by
3802  // deconstructing the source location.
3803  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
3804  if (!CXXUnit)
3805    return createCXString("");
3806
3807  SourceLocation Loc = SourceLocation::getFromRawEncoding(CXTok.int_data[1]);
3808  std::pair<FileID, unsigned> LocInfo
3809    = CXXUnit->getSourceManager().getDecomposedLoc(Loc);
3810  bool Invalid = false;
3811  llvm::StringRef Buffer
3812    = CXXUnit->getSourceManager().getBufferData(LocInfo.first, &Invalid);
3813  if (Invalid)
3814    return createCXString("");
3815
3816  return createCXString(Buffer.substr(LocInfo.second, CXTok.int_data[2]));
3817}
3818
3819CXSourceLocation clang_getTokenLocation(CXTranslationUnit TU, CXToken CXTok) {
3820  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
3821  if (!CXXUnit)
3822    return clang_getNullLocation();
3823
3824  return cxloc::translateSourceLocation(CXXUnit->getASTContext(),
3825                        SourceLocation::getFromRawEncoding(CXTok.int_data[1]));
3826}
3827
3828CXSourceRange clang_getTokenExtent(CXTranslationUnit TU, CXToken CXTok) {
3829  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
3830  if (!CXXUnit)
3831    return clang_getNullRange();
3832
3833  return cxloc::translateSourceRange(CXXUnit->getASTContext(),
3834                        SourceLocation::getFromRawEncoding(CXTok.int_data[1]));
3835}
3836
3837void clang_tokenize(CXTranslationUnit TU, CXSourceRange Range,
3838                    CXToken **Tokens, unsigned *NumTokens) {
3839  if (Tokens)
3840    *Tokens = 0;
3841  if (NumTokens)
3842    *NumTokens = 0;
3843
3844  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
3845  if (!CXXUnit || !Tokens || !NumTokens)
3846    return;
3847
3848  ASTUnit::ConcurrencyCheck Check(*CXXUnit);
3849
3850  SourceRange R = cxloc::translateCXSourceRange(Range);
3851  if (R.isInvalid())
3852    return;
3853
3854  SourceManager &SourceMgr = CXXUnit->getSourceManager();
3855  std::pair<FileID, unsigned> BeginLocInfo
3856    = SourceMgr.getDecomposedLoc(R.getBegin());
3857  std::pair<FileID, unsigned> EndLocInfo
3858    = SourceMgr.getDecomposedLoc(R.getEnd());
3859
3860  // Cannot tokenize across files.
3861  if (BeginLocInfo.first != EndLocInfo.first)
3862    return;
3863
3864  // Create a lexer
3865  bool Invalid = false;
3866  llvm::StringRef Buffer
3867    = SourceMgr.getBufferData(BeginLocInfo.first, &Invalid);
3868  if (Invalid)
3869    return;
3870
3871  Lexer Lex(SourceMgr.getLocForStartOfFile(BeginLocInfo.first),
3872            CXXUnit->getASTContext().getLangOptions(),
3873            Buffer.begin(), Buffer.data() + BeginLocInfo.second, Buffer.end());
3874  Lex.SetCommentRetentionState(true);
3875
3876  // Lex tokens until we hit the end of the range.
3877  const char *EffectiveBufferEnd = Buffer.data() + EndLocInfo.second;
3878  llvm::SmallVector<CXToken, 32> CXTokens;
3879  Token Tok;
3880  bool previousWasAt = false;
3881  do {
3882    // Lex the next token
3883    Lex.LexFromRawLexer(Tok);
3884    if (Tok.is(tok::eof))
3885      break;
3886
3887    // Initialize the CXToken.
3888    CXToken CXTok;
3889
3890    //   - Common fields
3891    CXTok.int_data[1] = Tok.getLocation().getRawEncoding();
3892    CXTok.int_data[2] = Tok.getLength();
3893    CXTok.int_data[3] = 0;
3894
3895    //   - Kind-specific fields
3896    if (Tok.isLiteral()) {
3897      CXTok.int_data[0] = CXToken_Literal;
3898      CXTok.ptr_data = (void *)Tok.getLiteralData();
3899    } else if (Tok.is(tok::identifier)) {
3900      // Lookup the identifier to determine whether we have a keyword.
3901      std::pair<FileID, unsigned> LocInfo
3902        = SourceMgr.getDecomposedLoc(Tok.getLocation());
3903      bool Invalid = false;
3904      llvm::StringRef Buf
3905        = CXXUnit->getSourceManager().getBufferData(LocInfo.first, &Invalid);
3906      if (Invalid)
3907        return;
3908
3909      const char *StartPos = Buf.data() + LocInfo.second;
3910      IdentifierInfo *II
3911        = CXXUnit->getPreprocessor().LookUpIdentifierInfo(Tok, StartPos);
3912
3913      if ((II->getObjCKeywordID() != tok::objc_not_keyword) && previousWasAt) {
3914        CXTok.int_data[0] = CXToken_Keyword;
3915      }
3916      else {
3917        CXTok.int_data[0] = II->getTokenID() == tok::identifier?
3918                                CXToken_Identifier
3919                              : CXToken_Keyword;
3920      }
3921      CXTok.ptr_data = II;
3922    } else if (Tok.is(tok::comment)) {
3923      CXTok.int_data[0] = CXToken_Comment;
3924      CXTok.ptr_data = 0;
3925    } else {
3926      CXTok.int_data[0] = CXToken_Punctuation;
3927      CXTok.ptr_data = 0;
3928    }
3929    CXTokens.push_back(CXTok);
3930    previousWasAt = Tok.is(tok::at);
3931  } while (Lex.getBufferLocation() <= EffectiveBufferEnd);
3932
3933  if (CXTokens.empty())
3934    return;
3935
3936  *Tokens = (CXToken *)malloc(sizeof(CXToken) * CXTokens.size());
3937  memmove(*Tokens, CXTokens.data(), sizeof(CXToken) * CXTokens.size());
3938  *NumTokens = CXTokens.size();
3939}
3940
3941void clang_disposeTokens(CXTranslationUnit TU,
3942                         CXToken *Tokens, unsigned NumTokens) {
3943  free(Tokens);
3944}
3945
3946} // end: extern "C"
3947
3948//===----------------------------------------------------------------------===//
3949// Token annotation APIs.
3950//===----------------------------------------------------------------------===//
3951
3952typedef llvm::DenseMap<unsigned, CXCursor> AnnotateTokensData;
3953static enum CXChildVisitResult AnnotateTokensVisitor(CXCursor cursor,
3954                                                     CXCursor parent,
3955                                                     CXClientData client_data);
3956namespace {
3957class AnnotateTokensWorker {
3958  AnnotateTokensData &Annotated;
3959  CXToken *Tokens;
3960  CXCursor *Cursors;
3961  unsigned NumTokens;
3962  unsigned TokIdx;
3963  unsigned PreprocessingTokIdx;
3964  CursorVisitor AnnotateVis;
3965  SourceManager &SrcMgr;
3966
3967  bool MoreTokens() const { return TokIdx < NumTokens; }
3968  unsigned NextToken() const { return TokIdx; }
3969  void AdvanceToken() { ++TokIdx; }
3970  SourceLocation GetTokenLoc(unsigned tokI) {
3971    return SourceLocation::getFromRawEncoding(Tokens[tokI].int_data[1]);
3972  }
3973
3974public:
3975  AnnotateTokensWorker(AnnotateTokensData &annotated,
3976                       CXToken *tokens, CXCursor *cursors, unsigned numTokens,
3977                       ASTUnit *CXXUnit, SourceRange RegionOfInterest)
3978    : Annotated(annotated), Tokens(tokens), Cursors(cursors),
3979      NumTokens(numTokens), TokIdx(0), PreprocessingTokIdx(0),
3980      AnnotateVis(CXXUnit, AnnotateTokensVisitor, this,
3981                  Decl::MaxPCHLevel, RegionOfInterest),
3982      SrcMgr(CXXUnit->getSourceManager()) {}
3983
3984  void VisitChildren(CXCursor C) { AnnotateVis.VisitChildren(C); }
3985  enum CXChildVisitResult Visit(CXCursor cursor, CXCursor parent);
3986  void AnnotateTokens(CXCursor parent);
3987  void AnnotateTokens() {
3988    AnnotateTokens(clang_getTranslationUnitCursor(AnnotateVis.getASTUnit()));
3989  }
3990};
3991}
3992
3993void AnnotateTokensWorker::AnnotateTokens(CXCursor parent) {
3994  // Walk the AST within the region of interest, annotating tokens
3995  // along the way.
3996  VisitChildren(parent);
3997
3998  for (unsigned I = 0 ; I < TokIdx ; ++I) {
3999    AnnotateTokensData::iterator Pos = Annotated.find(Tokens[I].int_data[1]);
4000    if (Pos != Annotated.end() &&
4001        (clang_isInvalid(Cursors[I].kind) ||
4002         Pos->second.kind != CXCursor_PreprocessingDirective))
4003      Cursors[I] = Pos->second;
4004  }
4005
4006  // Finish up annotating any tokens left.
4007  if (!MoreTokens())
4008    return;
4009
4010  const CXCursor &C = clang_getNullCursor();
4011  for (unsigned I = TokIdx ; I < NumTokens ; ++I) {
4012    AnnotateTokensData::iterator Pos = Annotated.find(Tokens[I].int_data[1]);
4013    Cursors[I] = (Pos == Annotated.end()) ? C : Pos->second;
4014  }
4015}
4016
4017enum CXChildVisitResult
4018AnnotateTokensWorker::Visit(CXCursor cursor, CXCursor parent) {
4019  CXSourceLocation Loc = clang_getCursorLocation(cursor);
4020  SourceRange cursorRange = getRawCursorExtent(cursor);
4021  if (cursorRange.isInvalid())
4022    return CXChildVisit_Recurse;
4023
4024  if (clang_isPreprocessing(cursor.kind)) {
4025    // For macro instantiations, just note where the beginning of the macro
4026    // instantiation occurs.
4027    if (cursor.kind == CXCursor_MacroInstantiation) {
4028      Annotated[Loc.int_data] = cursor;
4029      return CXChildVisit_Recurse;
4030    }
4031
4032    // Items in the preprocessing record are kept separate from items in
4033    // declarations, so we keep a separate token index.
4034    unsigned SavedTokIdx = TokIdx;
4035    TokIdx = PreprocessingTokIdx;
4036
4037    // Skip tokens up until we catch up to the beginning of the preprocessing
4038    // entry.
4039    while (MoreTokens()) {
4040      const unsigned I = NextToken();
4041      SourceLocation TokLoc = GetTokenLoc(I);
4042      switch (LocationCompare(SrcMgr, TokLoc, cursorRange)) {
4043      case RangeBefore:
4044        AdvanceToken();
4045        continue;
4046      case RangeAfter:
4047      case RangeOverlap:
4048        break;
4049      }
4050      break;
4051    }
4052
4053    // Look at all of the tokens within this range.
4054    while (MoreTokens()) {
4055      const unsigned I = NextToken();
4056      SourceLocation TokLoc = GetTokenLoc(I);
4057      switch (LocationCompare(SrcMgr, TokLoc, cursorRange)) {
4058      case RangeBefore:
4059        assert(0 && "Infeasible");
4060      case RangeAfter:
4061        break;
4062      case RangeOverlap:
4063        Cursors[I] = cursor;
4064        AdvanceToken();
4065        continue;
4066      }
4067      break;
4068    }
4069
4070    // Save the preprocessing token index; restore the non-preprocessing
4071    // token index.
4072    PreprocessingTokIdx = TokIdx;
4073    TokIdx = SavedTokIdx;
4074    return CXChildVisit_Recurse;
4075  }
4076
4077  if (cursorRange.isInvalid())
4078    return CXChildVisit_Continue;
4079
4080  SourceLocation L = SourceLocation::getFromRawEncoding(Loc.int_data);
4081
4082  // Adjust the annotated range based specific declarations.
4083  const enum CXCursorKind cursorK = clang_getCursorKind(cursor);
4084  if (cursorK >= CXCursor_FirstDecl && cursorK <= CXCursor_LastDecl) {
4085    Decl *D = cxcursor::getCursorDecl(cursor);
4086    // Don't visit synthesized ObjC methods, since they have no syntatic
4087    // representation in the source.
4088    if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
4089      if (MD->isSynthesized())
4090        return CXChildVisit_Continue;
4091    }
4092    if (const DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
4093      if (TypeSourceInfo *TI = DD->getTypeSourceInfo()) {
4094        TypeLoc TL = TI->getTypeLoc();
4095        SourceLocation TLoc = TL.getSourceRange().getBegin();
4096        if (TLoc.isValid() && L.isValid() &&
4097            SrcMgr.isBeforeInTranslationUnit(TLoc, L))
4098          cursorRange.setBegin(TLoc);
4099      }
4100    }
4101  }
4102
4103  // If the location of the cursor occurs within a macro instantiation, record
4104  // the spelling location of the cursor in our annotation map.  We can then
4105  // paper over the token labelings during a post-processing step to try and
4106  // get cursor mappings for tokens that are the *arguments* of a macro
4107  // instantiation.
4108  if (L.isMacroID()) {
4109    unsigned rawEncoding = SrcMgr.getSpellingLoc(L).getRawEncoding();
4110    // Only invalidate the old annotation if it isn't part of a preprocessing
4111    // directive.  Here we assume that the default construction of CXCursor
4112    // results in CXCursor.kind being an initialized value (i.e., 0).  If
4113    // this isn't the case, we can fix by doing lookup + insertion.
4114
4115    CXCursor &oldC = Annotated[rawEncoding];
4116    if (!clang_isPreprocessing(oldC.kind))
4117      oldC = cursor;
4118  }
4119
4120  const enum CXCursorKind K = clang_getCursorKind(parent);
4121  const CXCursor updateC =
4122    (clang_isInvalid(K) || K == CXCursor_TranslationUnit)
4123     ? clang_getNullCursor() : parent;
4124
4125  while (MoreTokens()) {
4126    const unsigned I = NextToken();
4127    SourceLocation TokLoc = GetTokenLoc(I);
4128    switch (LocationCompare(SrcMgr, TokLoc, cursorRange)) {
4129      case RangeBefore:
4130        Cursors[I] = updateC;
4131        AdvanceToken();
4132        continue;
4133      case RangeAfter:
4134      case RangeOverlap:
4135        break;
4136    }
4137    break;
4138  }
4139
4140  // Visit children to get their cursor information.
4141  const unsigned BeforeChildren = NextToken();
4142  VisitChildren(cursor);
4143  const unsigned AfterChildren = NextToken();
4144
4145  // Adjust 'Last' to the last token within the extent of the cursor.
4146  while (MoreTokens()) {
4147    const unsigned I = NextToken();
4148    SourceLocation TokLoc = GetTokenLoc(I);
4149    switch (LocationCompare(SrcMgr, TokLoc, cursorRange)) {
4150      case RangeBefore:
4151        assert(0 && "Infeasible");
4152      case RangeAfter:
4153        break;
4154      case RangeOverlap:
4155        Cursors[I] = updateC;
4156        AdvanceToken();
4157        continue;
4158    }
4159    break;
4160  }
4161  const unsigned Last = NextToken();
4162
4163  // Scan the tokens that are at the beginning of the cursor, but are not
4164  // capture by the child cursors.
4165
4166  // For AST elements within macros, rely on a post-annotate pass to
4167  // to correctly annotate the tokens with cursors.  Otherwise we can
4168  // get confusing results of having tokens that map to cursors that really
4169  // are expanded by an instantiation.
4170  if (L.isMacroID())
4171    cursor = clang_getNullCursor();
4172
4173  for (unsigned I = BeforeChildren; I != AfterChildren; ++I) {
4174    if (!clang_isInvalid(clang_getCursorKind(Cursors[I])))
4175      break;
4176
4177    Cursors[I] = cursor;
4178  }
4179  // Scan the tokens that are at the end of the cursor, but are not captured
4180  // but the child cursors.
4181  for (unsigned I = AfterChildren; I != Last; ++I)
4182    Cursors[I] = cursor;
4183
4184  TokIdx = Last;
4185  return CXChildVisit_Continue;
4186}
4187
4188static enum CXChildVisitResult AnnotateTokensVisitor(CXCursor cursor,
4189                                                     CXCursor parent,
4190                                                     CXClientData client_data) {
4191  return static_cast<AnnotateTokensWorker*>(client_data)->Visit(cursor, parent);
4192}
4193
4194// This gets run a separate thread to avoid stack blowout.
4195static void runAnnotateTokensWorker(void *UserData) {
4196  ((AnnotateTokensWorker*)UserData)->AnnotateTokens();
4197}
4198
4199extern "C" {
4200
4201void clang_annotateTokens(CXTranslationUnit TU,
4202                          CXToken *Tokens, unsigned NumTokens,
4203                          CXCursor *Cursors) {
4204
4205  if (NumTokens == 0 || !Tokens || !Cursors)
4206    return;
4207
4208  // Any token we don't specifically annotate will have a NULL cursor.
4209  CXCursor C = clang_getNullCursor();
4210  for (unsigned I = 0; I != NumTokens; ++I)
4211    Cursors[I] = C;
4212
4213  ASTUnit *CXXUnit = static_cast<ASTUnit *>(TU);
4214  if (!CXXUnit)
4215    return;
4216
4217  ASTUnit::ConcurrencyCheck Check(*CXXUnit);
4218
4219  // Determine the region of interest, which contains all of the tokens.
4220  SourceRange RegionOfInterest;
4221  RegionOfInterest.setBegin(cxloc::translateSourceLocation(
4222                                        clang_getTokenLocation(TU, Tokens[0])));
4223  RegionOfInterest.setEnd(cxloc::translateSourceLocation(
4224                                clang_getTokenLocation(TU,
4225                                                       Tokens[NumTokens - 1])));
4226
4227  // A mapping from the source locations found when re-lexing or traversing the
4228  // region of interest to the corresponding cursors.
4229  AnnotateTokensData Annotated;
4230
4231  // Relex the tokens within the source range to look for preprocessing
4232  // directives.
4233  SourceManager &SourceMgr = CXXUnit->getSourceManager();
4234  std::pair<FileID, unsigned> BeginLocInfo
4235    = SourceMgr.getDecomposedLoc(RegionOfInterest.getBegin());
4236  std::pair<FileID, unsigned> EndLocInfo
4237    = SourceMgr.getDecomposedLoc(RegionOfInterest.getEnd());
4238
4239  llvm::StringRef Buffer;
4240  bool Invalid = false;
4241  if (BeginLocInfo.first == EndLocInfo.first &&
4242      ((Buffer = SourceMgr.getBufferData(BeginLocInfo.first, &Invalid)),true) &&
4243      !Invalid) {
4244    Lexer Lex(SourceMgr.getLocForStartOfFile(BeginLocInfo.first),
4245              CXXUnit->getASTContext().getLangOptions(),
4246              Buffer.begin(), Buffer.data() + BeginLocInfo.second,
4247              Buffer.end());
4248    Lex.SetCommentRetentionState(true);
4249
4250    // Lex tokens in raw mode until we hit the end of the range, to avoid
4251    // entering #includes or expanding macros.
4252    while (true) {
4253      Token Tok;
4254      Lex.LexFromRawLexer(Tok);
4255
4256    reprocess:
4257      if (Tok.is(tok::hash) && Tok.isAtStartOfLine()) {
4258        // We have found a preprocessing directive. Gobble it up so that we
4259        // don't see it while preprocessing these tokens later, but keep track
4260        // of all of the token locations inside this preprocessing directive so
4261        // that we can annotate them appropriately.
4262        //
4263        // FIXME: Some simple tests here could identify macro definitions and
4264        // #undefs, to provide specific cursor kinds for those.
4265        std::vector<SourceLocation> Locations;
4266        do {
4267          Locations.push_back(Tok.getLocation());
4268          Lex.LexFromRawLexer(Tok);
4269        } while (!Tok.isAtStartOfLine() && !Tok.is(tok::eof));
4270
4271        using namespace cxcursor;
4272        CXCursor Cursor
4273          = MakePreprocessingDirectiveCursor(SourceRange(Locations.front(),
4274                                                         Locations.back()),
4275                                           CXXUnit);
4276        for (unsigned I = 0, N = Locations.size(); I != N; ++I) {
4277          Annotated[Locations[I].getRawEncoding()] = Cursor;
4278        }
4279
4280        if (Tok.isAtStartOfLine())
4281          goto reprocess;
4282
4283        continue;
4284      }
4285
4286      if (Tok.is(tok::eof))
4287        break;
4288    }
4289  }
4290
4291  // Annotate all of the source locations in the region of interest that map to
4292  // a specific cursor.
4293  AnnotateTokensWorker W(Annotated, Tokens, Cursors, NumTokens,
4294                         CXXUnit, RegionOfInterest);
4295
4296  // Run the worker within a CrashRecoveryContext.
4297  llvm::CrashRecoveryContext CRC;
4298  if (!RunSafely(CRC, runAnnotateTokensWorker, &W)) {
4299    fprintf(stderr, "libclang: crash detected while annotating tokens\n");
4300  }
4301}
4302} // end: extern "C"
4303
4304//===----------------------------------------------------------------------===//
4305// Operations for querying linkage of a cursor.
4306//===----------------------------------------------------------------------===//
4307
4308extern "C" {
4309CXLinkageKind clang_getCursorLinkage(CXCursor cursor) {
4310  if (!clang_isDeclaration(cursor.kind))
4311    return CXLinkage_Invalid;
4312
4313  Decl *D = cxcursor::getCursorDecl(cursor);
4314  if (NamedDecl *ND = dyn_cast_or_null<NamedDecl>(D))
4315    switch (ND->getLinkage()) {
4316      case NoLinkage: return CXLinkage_NoLinkage;
4317      case InternalLinkage: return CXLinkage_Internal;
4318      case UniqueExternalLinkage: return CXLinkage_UniqueExternal;
4319      case ExternalLinkage: return CXLinkage_External;
4320    };
4321
4322  return CXLinkage_Invalid;
4323}
4324} // end: extern "C"
4325
4326//===----------------------------------------------------------------------===//
4327// Operations for querying language of a cursor.
4328//===----------------------------------------------------------------------===//
4329
4330static CXLanguageKind getDeclLanguage(const Decl *D) {
4331  switch (D->getKind()) {
4332    default:
4333      break;
4334    case Decl::ImplicitParam:
4335    case Decl::ObjCAtDefsField:
4336    case Decl::ObjCCategory:
4337    case Decl::ObjCCategoryImpl:
4338    case Decl::ObjCClass:
4339    case Decl::ObjCCompatibleAlias:
4340    case Decl::ObjCForwardProtocol:
4341    case Decl::ObjCImplementation:
4342    case Decl::ObjCInterface:
4343    case Decl::ObjCIvar:
4344    case Decl::ObjCMethod:
4345    case Decl::ObjCProperty:
4346    case Decl::ObjCPropertyImpl:
4347    case Decl::ObjCProtocol:
4348      return CXLanguage_ObjC;
4349    case Decl::CXXConstructor:
4350    case Decl::CXXConversion:
4351    case Decl::CXXDestructor:
4352    case Decl::CXXMethod:
4353    case Decl::CXXRecord:
4354    case Decl::ClassTemplate:
4355    case Decl::ClassTemplatePartialSpecialization:
4356    case Decl::ClassTemplateSpecialization:
4357    case Decl::Friend:
4358    case Decl::FriendTemplate:
4359    case Decl::FunctionTemplate:
4360    case Decl::LinkageSpec:
4361    case Decl::Namespace:
4362    case Decl::NamespaceAlias:
4363    case Decl::NonTypeTemplateParm:
4364    case Decl::StaticAssert:
4365    case Decl::TemplateTemplateParm:
4366    case Decl::TemplateTypeParm:
4367    case Decl::UnresolvedUsingTypename:
4368    case Decl::UnresolvedUsingValue:
4369    case Decl::Using:
4370    case Decl::UsingDirective:
4371    case Decl::UsingShadow:
4372      return CXLanguage_CPlusPlus;
4373  }
4374
4375  return CXLanguage_C;
4376}
4377
4378extern "C" {
4379
4380enum CXAvailabilityKind clang_getCursorAvailability(CXCursor cursor) {
4381  if (clang_isDeclaration(cursor.kind))
4382    if (Decl *D = cxcursor::getCursorDecl(cursor)) {
4383      if (D->hasAttr<UnavailableAttr>() ||
4384          (isa<FunctionDecl>(D) && cast<FunctionDecl>(D)->isDeleted()))
4385        return CXAvailability_Available;
4386
4387      if (D->hasAttr<DeprecatedAttr>())
4388        return CXAvailability_Deprecated;
4389    }
4390
4391  return CXAvailability_Available;
4392}
4393
4394CXLanguageKind clang_getCursorLanguage(CXCursor cursor) {
4395  if (clang_isDeclaration(cursor.kind))
4396    return getDeclLanguage(cxcursor::getCursorDecl(cursor));
4397
4398  return CXLanguage_Invalid;
4399}
4400
4401CXCursor clang_getCursorSemanticParent(CXCursor cursor) {
4402  if (clang_isDeclaration(cursor.kind)) {
4403    if (Decl *D = getCursorDecl(cursor)) {
4404      DeclContext *DC = D->getDeclContext();
4405      return MakeCXCursor(cast<Decl>(DC), getCursorASTUnit(cursor));
4406    }
4407  }
4408
4409  if (clang_isStatement(cursor.kind) || clang_isExpression(cursor.kind)) {
4410    if (Decl *D = getCursorDecl(cursor))
4411      return MakeCXCursor(D, getCursorASTUnit(cursor));
4412  }
4413
4414  return clang_getNullCursor();
4415}
4416
4417CXCursor clang_getCursorLexicalParent(CXCursor cursor) {
4418  if (clang_isDeclaration(cursor.kind)) {
4419    if (Decl *D = getCursorDecl(cursor)) {
4420      DeclContext *DC = D->getLexicalDeclContext();
4421      return MakeCXCursor(cast<Decl>(DC), getCursorASTUnit(cursor));
4422    }
4423  }
4424
4425  // FIXME: Note that we can't easily compute the lexical context of a
4426  // statement or expression, so we return nothing.
4427  return clang_getNullCursor();
4428}
4429
4430static void CollectOverriddenMethods(DeclContext *Ctx,
4431                                     ObjCMethodDecl *Method,
4432                            llvm::SmallVectorImpl<ObjCMethodDecl *> &Methods) {
4433  if (!Ctx)
4434    return;
4435
4436  // If we have a class or category implementation, jump straight to the
4437  // interface.
4438  if (ObjCImplDecl *Impl = dyn_cast<ObjCImplDecl>(Ctx))
4439    return CollectOverriddenMethods(Impl->getClassInterface(), Method, Methods);
4440
4441  ObjCContainerDecl *Container = dyn_cast<ObjCContainerDecl>(Ctx);
4442  if (!Container)
4443    return;
4444
4445  // Check whether we have a matching method at this level.
4446  if (ObjCMethodDecl *Overridden = Container->getMethod(Method->getSelector(),
4447                                                    Method->isInstanceMethod()))
4448    if (Method != Overridden) {
4449      // We found an override at this level; there is no need to look
4450      // into other protocols or categories.
4451      Methods.push_back(Overridden);
4452      return;
4453    }
4454
4455  if (ObjCProtocolDecl *Protocol = dyn_cast<ObjCProtocolDecl>(Container)) {
4456    for (ObjCProtocolDecl::protocol_iterator P = Protocol->protocol_begin(),
4457                                          PEnd = Protocol->protocol_end();
4458         P != PEnd; ++P)
4459      CollectOverriddenMethods(*P, Method, Methods);
4460  }
4461
4462  if (ObjCCategoryDecl *Category = dyn_cast<ObjCCategoryDecl>(Container)) {
4463    for (ObjCCategoryDecl::protocol_iterator P = Category->protocol_begin(),
4464                                          PEnd = Category->protocol_end();
4465         P != PEnd; ++P)
4466      CollectOverriddenMethods(*P, Method, Methods);
4467  }
4468
4469  if (ObjCInterfaceDecl *Interface = dyn_cast<ObjCInterfaceDecl>(Container)) {
4470    for (ObjCInterfaceDecl::protocol_iterator P = Interface->protocol_begin(),
4471                                           PEnd = Interface->protocol_end();
4472         P != PEnd; ++P)
4473      CollectOverriddenMethods(*P, Method, Methods);
4474
4475    for (ObjCCategoryDecl *Category = Interface->getCategoryList();
4476         Category; Category = Category->getNextClassCategory())
4477      CollectOverriddenMethods(Category, Method, Methods);
4478
4479    // We only look into the superclass if we haven't found anything yet.
4480    if (Methods.empty())
4481      if (ObjCInterfaceDecl *Super = Interface->getSuperClass())
4482        return CollectOverriddenMethods(Super, Method, Methods);
4483  }
4484}
4485
4486void clang_getOverriddenCursors(CXCursor cursor,
4487                                CXCursor **overridden,
4488                                unsigned *num_overridden) {
4489  if (overridden)
4490    *overridden = 0;
4491  if (num_overridden)
4492    *num_overridden = 0;
4493  if (!overridden || !num_overridden)
4494    return;
4495
4496  if (!clang_isDeclaration(cursor.kind))
4497    return;
4498
4499  Decl *D = getCursorDecl(cursor);
4500  if (!D)
4501    return;
4502
4503  // Handle C++ member functions.
4504  ASTUnit *CXXUnit = getCursorASTUnit(cursor);
4505  if (CXXMethodDecl *CXXMethod = dyn_cast<CXXMethodDecl>(D)) {
4506    *num_overridden = CXXMethod->size_overridden_methods();
4507    if (!*num_overridden)
4508      return;
4509
4510    *overridden = new CXCursor [*num_overridden];
4511    unsigned I = 0;
4512    for (CXXMethodDecl::method_iterator
4513              M = CXXMethod->begin_overridden_methods(),
4514           MEnd = CXXMethod->end_overridden_methods();
4515         M != MEnd; (void)++M, ++I)
4516      (*overridden)[I] = MakeCXCursor(const_cast<CXXMethodDecl*>(*M), CXXUnit);
4517    return;
4518  }
4519
4520  ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D);
4521  if (!Method)
4522    return;
4523
4524  // Handle Objective-C methods.
4525  llvm::SmallVector<ObjCMethodDecl *, 4> Methods;
4526  CollectOverriddenMethods(Method->getDeclContext(), Method, Methods);
4527
4528  if (Methods.empty())
4529    return;
4530
4531  *num_overridden = Methods.size();
4532  *overridden = new CXCursor [Methods.size()];
4533  for (unsigned I = 0, N = Methods.size(); I != N; ++I)
4534    (*overridden)[I] = MakeCXCursor(Methods[I], CXXUnit);
4535}
4536
4537void clang_disposeOverriddenCursors(CXCursor *overridden) {
4538  delete [] overridden;
4539}
4540
4541CXFile clang_getIncludedFile(CXCursor cursor) {
4542  if (cursor.kind != CXCursor_InclusionDirective)
4543    return 0;
4544
4545  InclusionDirective *ID = getCursorInclusionDirective(cursor);
4546  return (void *)ID->getFile();
4547}
4548
4549} // end: extern "C"
4550
4551
4552//===----------------------------------------------------------------------===//
4553// C++ AST instrospection.
4554//===----------------------------------------------------------------------===//
4555
4556extern "C" {
4557unsigned clang_CXXMethod_isStatic(CXCursor C) {
4558  if (!clang_isDeclaration(C.kind))
4559    return 0;
4560
4561  CXXMethodDecl *Method = 0;
4562  Decl *D = cxcursor::getCursorDecl(C);
4563  if (FunctionTemplateDecl *FunTmpl = dyn_cast_or_null<FunctionTemplateDecl>(D))
4564    Method = dyn_cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
4565  else
4566    Method = dyn_cast_or_null<CXXMethodDecl>(D);
4567  return (Method && Method->isStatic()) ? 1 : 0;
4568}
4569
4570} // end: extern "C"
4571
4572//===----------------------------------------------------------------------===//
4573// Attribute introspection.
4574//===----------------------------------------------------------------------===//
4575
4576extern "C" {
4577CXType clang_getIBOutletCollectionType(CXCursor C) {
4578  if (C.kind != CXCursor_IBOutletCollectionAttr)
4579    return cxtype::MakeCXType(QualType(), cxcursor::getCursorASTUnit(C));
4580
4581  IBOutletCollectionAttr *A =
4582    cast<IBOutletCollectionAttr>(cxcursor::getCursorAttr(C));
4583
4584  return cxtype::MakeCXType(A->getInterface(), cxcursor::getCursorASTUnit(C));
4585}
4586} // end: extern "C"
4587
4588//===----------------------------------------------------------------------===//
4589// CXString Operations.
4590//===----------------------------------------------------------------------===//
4591
4592extern "C" {
4593const char *clang_getCString(CXString string) {
4594  return string.Spelling;
4595}
4596
4597void clang_disposeString(CXString string) {
4598  if (string.MustFreeString && string.Spelling)
4599    free((void*)string.Spelling);
4600}
4601
4602} // end: extern "C"
4603
4604namespace clang { namespace cxstring {
4605CXString createCXString(const char *String, bool DupString){
4606  CXString Str;
4607  if (DupString) {
4608    Str.Spelling = strdup(String);
4609    Str.MustFreeString = 1;
4610  } else {
4611    Str.Spelling = String;
4612    Str.MustFreeString = 0;
4613  }
4614  return Str;
4615}
4616
4617CXString createCXString(llvm::StringRef String, bool DupString) {
4618  CXString Result;
4619  if (DupString || (!String.empty() && String.data()[String.size()] != 0)) {
4620    char *Spelling = (char *)malloc(String.size() + 1);
4621    memmove(Spelling, String.data(), String.size());
4622    Spelling[String.size()] = 0;
4623    Result.Spelling = Spelling;
4624    Result.MustFreeString = 1;
4625  } else {
4626    Result.Spelling = String.data();
4627    Result.MustFreeString = 0;
4628  }
4629  return Result;
4630}
4631}}
4632
4633//===----------------------------------------------------------------------===//
4634// Misc. utility functions.
4635//===----------------------------------------------------------------------===//
4636
4637/// Default to using an 8 MB stack size on "safety" threads.
4638static unsigned SafetyStackThreadSize = 8 << 20;
4639
4640namespace clang {
4641
4642bool RunSafely(llvm::CrashRecoveryContext &CRC,
4643               void (*Fn)(void*), void *UserData) {
4644  if (unsigned Size = GetSafetyThreadStackSize())
4645    return CRC.RunSafelyOnThread(Fn, UserData, Size);
4646  return CRC.RunSafely(Fn, UserData);
4647}
4648
4649unsigned GetSafetyThreadStackSize() {
4650  return SafetyStackThreadSize;
4651}
4652
4653void SetSafetyThreadStackSize(unsigned Value) {
4654  SafetyStackThreadSize = Value;
4655}
4656
4657}
4658
4659extern "C" {
4660
4661CXString clang_getClangVersion() {
4662  return createCXString(getClangFullVersion());
4663}
4664
4665} // end: extern "C"
4666