1 #include "clang/AST/JSONNodeDumper.h"
2 #include "clang/Lex/Lexer.h"
3 #include "llvm/ADT/StringSwitch.h"
4 
5 using namespace clang;
6 
7 void JSONNodeDumper::addPreviousDeclaration(const Decl *D) {
8   switch (D->getKind()) {
9 #define DECL(DERIVED, BASE)                                                    \
10   case Decl::DERIVED:                                                          \
11     return writePreviousDeclImpl(cast<DERIVED##Decl>(D));
12 #define ABSTRACT_DECL(DECL)
13 #include "clang/AST/DeclNodes.inc"
14 #undef ABSTRACT_DECL
15 #undef DECL
16   }
17   llvm_unreachable("Decl that isn't part of DeclNodes.inc!");
18 }
19 
20 void JSONNodeDumper::Visit(const Attr *A) {
21   const char *AttrName = nullptr;
22   switch (A->getKind()) {
23 #define ATTR(X)                                                                \
24   case attr::X:                                                                \
25     AttrName = #X"Attr";                                                       \
26     break;
27 #include "clang/Basic/AttrList.inc"
28 #undef ATTR
29   }
30   JOS.attribute("id", createPointerRepresentation(A));
31   JOS.attribute("kind", AttrName);
32   JOS.attributeObject("range", [A, this] { writeSourceRange(A->getRange()); });
33   attributeOnlyIfTrue("inherited", A->isInherited());
34   attributeOnlyIfTrue("implicit", A->isImplicit());
35 
36   // FIXME: it would be useful for us to output the spelling kind as well as
37   // the actual spelling. This would allow us to distinguish between the
38   // various attribute syntaxes, but we don't currently track that information
39   // within the AST.
40   //JOS.attribute("spelling", A->getSpelling());
41 
42   InnerAttrVisitor::Visit(A);
43 }
44 
45 void JSONNodeDumper::Visit(const Stmt *S) {
46   if (!S)
47     return;
48 
49   JOS.attribute("id", createPointerRepresentation(S));
50   JOS.attribute("kind", S->getStmtClassName());
51   JOS.attributeObject("range",
52                       [S, this] { writeSourceRange(S->getSourceRange()); });
53 
54   if (const auto *E = dyn_cast<Expr>(S)) {
55     JOS.attribute("type", createQualType(E->getType()));
56     const char *Category = nullptr;
57     switch (E->getValueKind()) {
58     case VK_LValue: Category = "lvalue"; break;
59     case VK_XValue: Category = "xvalue"; break;
60     case VK_RValue: Category = "rvalue"; break;
61     }
62     JOS.attribute("valueCategory", Category);
63   }
64   InnerStmtVisitor::Visit(S);
65 }
66 
67 void JSONNodeDumper::Visit(const Type *T) {
68   JOS.attribute("id", createPointerRepresentation(T));
69   JOS.attribute("kind", (llvm::Twine(T->getTypeClassName()) + "Type").str());
70   JOS.attribute("type", createQualType(QualType(T, 0), /*Desugar*/ false));
71   attributeOnlyIfTrue("isDependent", T->isDependentType());
72   attributeOnlyIfTrue("isInstantiationDependent",
73                       T->isInstantiationDependentType());
74   attributeOnlyIfTrue("isVariablyModified", T->isVariablyModifiedType());
75   attributeOnlyIfTrue("containsUnexpandedPack",
76                       T->containsUnexpandedParameterPack());
77   attributeOnlyIfTrue("isImported", T->isFromAST());
78   InnerTypeVisitor::Visit(T);
79 }
80 
81 void JSONNodeDumper::Visit(QualType T) {
82   JOS.attribute("id", createPointerRepresentation(T.getAsOpaquePtr()));
83   JOS.attribute("kind", "QualType");
84   JOS.attribute("type", createQualType(T));
85   JOS.attribute("qualifiers", T.split().Quals.getAsString());
86 }
87 
88 void JSONNodeDumper::Visit(const Decl *D) {
89   JOS.attribute("id", createPointerRepresentation(D));
90 
91   if (!D)
92     return;
93 
94   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
95   JOS.attributeObject("loc",
96                       [D, this] { writeSourceLocation(D->getLocation()); });
97   JOS.attributeObject("range",
98                       [D, this] { writeSourceRange(D->getSourceRange()); });
99   attributeOnlyIfTrue("isImplicit", D->isImplicit());
100   attributeOnlyIfTrue("isInvalid", D->isInvalidDecl());
101 
102   if (D->isUsed())
103     JOS.attribute("isUsed", true);
104   else if (D->isThisDeclarationReferenced())
105     JOS.attribute("isReferenced", true);
106 
107   if (const auto *ND = dyn_cast<NamedDecl>(D))
108     attributeOnlyIfTrue("isHidden", ND->isHidden());
109 
110   if (D->getLexicalDeclContext() != D->getDeclContext())
111     JOS.attribute("parentDeclContext",
112                   createPointerRepresentation(D->getDeclContext()));
113 
114   addPreviousDeclaration(D);
115   InnerDeclVisitor::Visit(D);
116 }
117 
118 void JSONNodeDumper::Visit(const comments::Comment *C,
119                            const comments::FullComment *FC) {
120   if (!C)
121     return;
122 
123   JOS.attribute("id", createPointerRepresentation(C));
124   JOS.attribute("kind", C->getCommentKindName());
125   JOS.attributeObject("loc",
126                       [C, this] { writeSourceLocation(C->getLocation()); });
127   JOS.attributeObject("range",
128                       [C, this] { writeSourceRange(C->getSourceRange()); });
129 
130   InnerCommentVisitor::visit(C, FC);
131 }
132 
133 void JSONNodeDumper::Visit(const TemplateArgument &TA, SourceRange R,
134                            const Decl *From, StringRef Label) {
135   JOS.attribute("kind", "TemplateArgument");
136   if (R.isValid())
137     JOS.attributeObject("range", [R, this] { writeSourceRange(R); });
138 
139   if (From)
140     JOS.attribute(Label.empty() ? "fromDecl" : Label, createBareDeclRef(From));
141 
142   InnerTemplateArgVisitor::Visit(TA);
143 }
144 
145 void JSONNodeDumper::Visit(const CXXCtorInitializer *Init) {
146   JOS.attribute("kind", "CXXCtorInitializer");
147   if (Init->isAnyMemberInitializer())
148     JOS.attribute("anyInit", createBareDeclRef(Init->getAnyMember()));
149   else if (Init->isBaseInitializer())
150     JOS.attribute("baseInit",
151                   createQualType(QualType(Init->getBaseClass(), 0)));
152   else if (Init->isDelegatingInitializer())
153     JOS.attribute("delegatingInit",
154                   createQualType(Init->getTypeSourceInfo()->getType()));
155   else
156     llvm_unreachable("Unknown initializer type");
157 }
158 
159 void JSONNodeDumper::Visit(const OMPClause *C) {}
160 
161 void JSONNodeDumper::Visit(const BlockDecl::Capture &C) {
162   JOS.attribute("kind", "Capture");
163   attributeOnlyIfTrue("byref", C.isByRef());
164   attributeOnlyIfTrue("nested", C.isNested());
165   if (C.getVariable())
166     JOS.attribute("var", createBareDeclRef(C.getVariable()));
167 }
168 
169 void JSONNodeDumper::Visit(const GenericSelectionExpr::ConstAssociation &A) {
170   JOS.attribute("associationKind", A.getTypeSourceInfo() ? "case" : "default");
171   attributeOnlyIfTrue("selected", A.isSelected());
172 }
173 
174 void JSONNodeDumper::writeBareSourceLocation(SourceLocation Loc,
175                                              bool IsSpelling) {
176   PresumedLoc Presumed = SM.getPresumedLoc(Loc);
177   unsigned ActualLine = IsSpelling ? SM.getSpellingLineNumber(Loc)
178                                    : SM.getExpansionLineNumber(Loc);
179   if (Presumed.isValid()) {
180     if (LastLocFilename != Presumed.getFilename()) {
181       JOS.attribute("file", Presumed.getFilename());
182       JOS.attribute("line", ActualLine);
183     } else if (LastLocLine != ActualLine)
184       JOS.attribute("line", ActualLine);
185 
186     unsigned PresumedLine = Presumed.getLine();
187     if (ActualLine != PresumedLine && LastLocPresumedLine != PresumedLine)
188       JOS.attribute("presumedLine", PresumedLine);
189 
190     JOS.attribute("col", Presumed.getColumn());
191     JOS.attribute("tokLen",
192                   Lexer::MeasureTokenLength(Loc, SM, Ctx.getLangOpts()));
193     LastLocFilename = Presumed.getFilename();
194     LastLocPresumedLine = PresumedLine;
195     LastLocLine = ActualLine;
196   }
197 }
198 
199 void JSONNodeDumper::writeSourceLocation(SourceLocation Loc) {
200   SourceLocation Spelling = SM.getSpellingLoc(Loc);
201   SourceLocation Expansion = SM.getExpansionLoc(Loc);
202 
203   if (Expansion != Spelling) {
204     // If the expansion and the spelling are different, output subobjects
205     // describing both locations.
206     JOS.attributeObject("spellingLoc", [Spelling, this] {
207       writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
208     });
209     JOS.attributeObject("expansionLoc", [Expansion, Loc, this] {
210       writeBareSourceLocation(Expansion, /*IsSpelling*/ false);
211       // If there is a macro expansion, add extra information if the interesting
212       // bit is the macro arg expansion.
213       if (SM.isMacroArgExpansion(Loc))
214         JOS.attribute("isMacroArgExpansion", true);
215     });
216   } else
217     writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
218 }
219 
220 void JSONNodeDumper::writeSourceRange(SourceRange R) {
221   JOS.attributeObject("begin",
222                       [R, this] { writeSourceLocation(R.getBegin()); });
223   JOS.attributeObject("end", [R, this] { writeSourceLocation(R.getEnd()); });
224 }
225 
226 std::string JSONNodeDumper::createPointerRepresentation(const void *Ptr) {
227   // Because JSON stores integer values as signed 64-bit integers, trying to
228   // represent them as such makes for very ugly pointer values in the resulting
229   // output. Instead, we convert the value to hex and treat it as a string.
230   return "0x" + llvm::utohexstr(reinterpret_cast<uint64_t>(Ptr), true);
231 }
232 
233 llvm::json::Object JSONNodeDumper::createQualType(QualType QT, bool Desugar) {
234   SplitQualType SQT = QT.split();
235   llvm::json::Object Ret{{"qualType", QualType::getAsString(SQT, PrintPolicy)}};
236 
237   if (Desugar && !QT.isNull()) {
238     SplitQualType DSQT = QT.getSplitDesugaredType();
239     if (DSQT != SQT)
240       Ret["desugaredQualType"] = QualType::getAsString(DSQT, PrintPolicy);
241     if (const auto *TT = QT->getAs<TypedefType>())
242       Ret["typeAliasDeclId"] = createPointerRepresentation(TT->getDecl());
243   }
244   return Ret;
245 }
246 
247 void JSONNodeDumper::writeBareDeclRef(const Decl *D) {
248   JOS.attribute("id", createPointerRepresentation(D));
249   if (!D)
250     return;
251 
252   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
253   if (const auto *ND = dyn_cast<NamedDecl>(D))
254     JOS.attribute("name", ND->getDeclName().getAsString());
255   if (const auto *VD = dyn_cast<ValueDecl>(D))
256     JOS.attribute("type", createQualType(VD->getType()));
257 }
258 
259 llvm::json::Object JSONNodeDumper::createBareDeclRef(const Decl *D) {
260   llvm::json::Object Ret{{"id", createPointerRepresentation(D)}};
261   if (!D)
262     return Ret;
263 
264   Ret["kind"] = (llvm::Twine(D->getDeclKindName()) + "Decl").str();
265   if (const auto *ND = dyn_cast<NamedDecl>(D))
266     Ret["name"] = ND->getDeclName().getAsString();
267   if (const auto *VD = dyn_cast<ValueDecl>(D))
268     Ret["type"] = createQualType(VD->getType());
269   return Ret;
270 }
271 
272 llvm::json::Array JSONNodeDumper::createCastPath(const CastExpr *C) {
273   llvm::json::Array Ret;
274   if (C->path_empty())
275     return Ret;
276 
277   for (auto I = C->path_begin(), E = C->path_end(); I != E; ++I) {
278     const CXXBaseSpecifier *Base = *I;
279     const auto *RD =
280         cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl());
281 
282     llvm::json::Object Val{{"name", RD->getName()}};
283     if (Base->isVirtual())
284       Val["isVirtual"] = true;
285     Ret.push_back(std::move(Val));
286   }
287   return Ret;
288 }
289 
290 #define FIELD2(Name, Flag)  if (RD->Flag()) Ret[Name] = true
291 #define FIELD1(Flag)        FIELD2(#Flag, Flag)
292 
293 static llvm::json::Object
294 createDefaultConstructorDefinitionData(const CXXRecordDecl *RD) {
295   llvm::json::Object Ret;
296 
297   FIELD2("exists", hasDefaultConstructor);
298   FIELD2("trivial", hasTrivialDefaultConstructor);
299   FIELD2("nonTrivial", hasNonTrivialDefaultConstructor);
300   FIELD2("userProvided", hasUserProvidedDefaultConstructor);
301   FIELD2("isConstexpr", hasConstexprDefaultConstructor);
302   FIELD2("needsImplicit", needsImplicitDefaultConstructor);
303   FIELD2("defaultedIsConstexpr", defaultedDefaultConstructorIsConstexpr);
304 
305   return Ret;
306 }
307 
308 static llvm::json::Object
309 createCopyConstructorDefinitionData(const CXXRecordDecl *RD) {
310   llvm::json::Object Ret;
311 
312   FIELD2("simple", hasSimpleCopyConstructor);
313   FIELD2("trivial", hasTrivialCopyConstructor);
314   FIELD2("nonTrivial", hasNonTrivialCopyConstructor);
315   FIELD2("userDeclared", hasUserDeclaredCopyConstructor);
316   FIELD2("hasConstParam", hasCopyConstructorWithConstParam);
317   FIELD2("implicitHasConstParam", implicitCopyConstructorHasConstParam);
318   FIELD2("needsImplicit", needsImplicitCopyConstructor);
319   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyConstructor);
320   if (!RD->needsOverloadResolutionForCopyConstructor())
321     FIELD2("defaultedIsDeleted", defaultedCopyConstructorIsDeleted);
322 
323   return Ret;
324 }
325 
326 static llvm::json::Object
327 createMoveConstructorDefinitionData(const CXXRecordDecl *RD) {
328   llvm::json::Object Ret;
329 
330   FIELD2("exists", hasMoveConstructor);
331   FIELD2("simple", hasSimpleMoveConstructor);
332   FIELD2("trivial", hasTrivialMoveConstructor);
333   FIELD2("nonTrivial", hasNonTrivialMoveConstructor);
334   FIELD2("userDeclared", hasUserDeclaredMoveConstructor);
335   FIELD2("needsImplicit", needsImplicitMoveConstructor);
336   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveConstructor);
337   if (!RD->needsOverloadResolutionForMoveConstructor())
338     FIELD2("defaultedIsDeleted", defaultedMoveConstructorIsDeleted);
339 
340   return Ret;
341 }
342 
343 static llvm::json::Object
344 createCopyAssignmentDefinitionData(const CXXRecordDecl *RD) {
345   llvm::json::Object Ret;
346 
347   FIELD2("trivial", hasTrivialCopyAssignment);
348   FIELD2("nonTrivial", hasNonTrivialCopyAssignment);
349   FIELD2("hasConstParam", hasCopyAssignmentWithConstParam);
350   FIELD2("implicitHasConstParam", implicitCopyAssignmentHasConstParam);
351   FIELD2("userDeclared", hasUserDeclaredCopyAssignment);
352   FIELD2("needsImplicit", needsImplicitCopyAssignment);
353   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyAssignment);
354 
355   return Ret;
356 }
357 
358 static llvm::json::Object
359 createMoveAssignmentDefinitionData(const CXXRecordDecl *RD) {
360   llvm::json::Object Ret;
361 
362   FIELD2("exists", hasMoveAssignment);
363   FIELD2("simple", hasSimpleMoveAssignment);
364   FIELD2("trivial", hasTrivialMoveAssignment);
365   FIELD2("nonTrivial", hasNonTrivialMoveAssignment);
366   FIELD2("userDeclared", hasUserDeclaredMoveAssignment);
367   FIELD2("needsImplicit", needsImplicitMoveAssignment);
368   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveAssignment);
369 
370   return Ret;
371 }
372 
373 static llvm::json::Object
374 createDestructorDefinitionData(const CXXRecordDecl *RD) {
375   llvm::json::Object Ret;
376 
377   FIELD2("simple", hasSimpleDestructor);
378   FIELD2("irrelevant", hasIrrelevantDestructor);
379   FIELD2("trivial", hasTrivialDestructor);
380   FIELD2("nonTrivial", hasNonTrivialDestructor);
381   FIELD2("userDeclared", hasUserDeclaredDestructor);
382   FIELD2("needsImplicit", needsImplicitDestructor);
383   FIELD2("needsOverloadResolution", needsOverloadResolutionForDestructor);
384   if (!RD->needsOverloadResolutionForDestructor())
385     FIELD2("defaultedIsDeleted", defaultedDestructorIsDeleted);
386 
387   return Ret;
388 }
389 
390 llvm::json::Object
391 JSONNodeDumper::createCXXRecordDefinitionData(const CXXRecordDecl *RD) {
392   llvm::json::Object Ret;
393 
394   // This data is common to all C++ classes.
395   FIELD1(isGenericLambda);
396   FIELD1(isLambda);
397   FIELD1(isEmpty);
398   FIELD1(isAggregate);
399   FIELD1(isStandardLayout);
400   FIELD1(isTriviallyCopyable);
401   FIELD1(isPOD);
402   FIELD1(isTrivial);
403   FIELD1(isPolymorphic);
404   FIELD1(isAbstract);
405   FIELD1(isLiteral);
406   FIELD1(canPassInRegisters);
407   FIELD1(hasUserDeclaredConstructor);
408   FIELD1(hasConstexprNonCopyMoveConstructor);
409   FIELD1(hasMutableFields);
410   FIELD1(hasVariantMembers);
411   FIELD2("canConstDefaultInit", allowConstDefaultInit);
412 
413   Ret["defaultCtor"] = createDefaultConstructorDefinitionData(RD);
414   Ret["copyCtor"] = createCopyConstructorDefinitionData(RD);
415   Ret["moveCtor"] = createMoveConstructorDefinitionData(RD);
416   Ret["copyAssign"] = createCopyAssignmentDefinitionData(RD);
417   Ret["moveAssign"] = createMoveAssignmentDefinitionData(RD);
418   Ret["dtor"] = createDestructorDefinitionData(RD);
419 
420   return Ret;
421 }
422 
423 #undef FIELD1
424 #undef FIELD2
425 
426 std::string JSONNodeDumper::createAccessSpecifier(AccessSpecifier AS) {
427   switch (AS) {
428   case AS_none: return "none";
429   case AS_private: return "private";
430   case AS_protected: return "protected";
431   case AS_public: return "public";
432   }
433   llvm_unreachable("Unknown access specifier");
434 }
435 
436 llvm::json::Object
437 JSONNodeDumper::createCXXBaseSpecifier(const CXXBaseSpecifier &BS) {
438   llvm::json::Object Ret;
439 
440   Ret["type"] = createQualType(BS.getType());
441   Ret["access"] = createAccessSpecifier(BS.getAccessSpecifier());
442   Ret["writtenAccess"] =
443       createAccessSpecifier(BS.getAccessSpecifierAsWritten());
444   if (BS.isVirtual())
445     Ret["isVirtual"] = true;
446   if (BS.isPackExpansion())
447     Ret["isPackExpansion"] = true;
448 
449   return Ret;
450 }
451 
452 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
453   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
454 }
455 
456 void JSONNodeDumper::VisitFunctionType(const FunctionType *T) {
457   FunctionType::ExtInfo E = T->getExtInfo();
458   attributeOnlyIfTrue("noreturn", E.getNoReturn());
459   attributeOnlyIfTrue("producesResult", E.getProducesResult());
460   if (E.getHasRegParm())
461     JOS.attribute("regParm", E.getRegParm());
462   JOS.attribute("cc", FunctionType::getNameForCallConv(E.getCC()));
463 }
464 
465 void JSONNodeDumper::VisitFunctionProtoType(const FunctionProtoType *T) {
466   FunctionProtoType::ExtProtoInfo E = T->getExtProtoInfo();
467   attributeOnlyIfTrue("trailingReturn", E.HasTrailingReturn);
468   attributeOnlyIfTrue("const", T->isConst());
469   attributeOnlyIfTrue("volatile", T->isVolatile());
470   attributeOnlyIfTrue("restrict", T->isRestrict());
471   attributeOnlyIfTrue("variadic", E.Variadic);
472   switch (E.RefQualifier) {
473   case RQ_LValue: JOS.attribute("refQualifier", "&"); break;
474   case RQ_RValue: JOS.attribute("refQualifier", "&&"); break;
475   case RQ_None: break;
476   }
477   switch (E.ExceptionSpec.Type) {
478   case EST_DynamicNone:
479   case EST_Dynamic: {
480     JOS.attribute("exceptionSpec", "throw");
481     llvm::json::Array Types;
482     for (QualType QT : E.ExceptionSpec.Exceptions)
483       Types.push_back(createQualType(QT));
484     JOS.attribute("exceptionTypes", std::move(Types));
485   } break;
486   case EST_MSAny:
487     JOS.attribute("exceptionSpec", "throw");
488     JOS.attribute("throwsAny", true);
489     break;
490   case EST_BasicNoexcept:
491     JOS.attribute("exceptionSpec", "noexcept");
492     break;
493   case EST_NoexceptTrue:
494   case EST_NoexceptFalse:
495     JOS.attribute("exceptionSpec", "noexcept");
496     JOS.attribute("conditionEvaluatesTo",
497                 E.ExceptionSpec.Type == EST_NoexceptTrue);
498     //JOS.attributeWithCall("exceptionSpecExpr",
499     //                    [this, E]() { Visit(E.ExceptionSpec.NoexceptExpr); });
500     break;
501   case EST_NoThrow:
502     JOS.attribute("exceptionSpec", "nothrow");
503     break;
504   // FIXME: I cannot find a way to trigger these cases while dumping the AST. I
505   // suspect you can only run into them when executing an AST dump from within
506   // the debugger, which is not a use case we worry about for the JSON dumping
507   // feature.
508   case EST_DependentNoexcept:
509   case EST_Unevaluated:
510   case EST_Uninstantiated:
511   case EST_Unparsed:
512   case EST_None: break;
513   }
514   VisitFunctionType(T);
515 }
516 
517 void JSONNodeDumper::VisitRValueReferenceType(const ReferenceType *RT) {
518   attributeOnlyIfTrue("spelledAsLValue", RT->isSpelledAsLValue());
519 }
520 
521 void JSONNodeDumper::VisitArrayType(const ArrayType *AT) {
522   switch (AT->getSizeModifier()) {
523   case ArrayType::Star:
524     JOS.attribute("sizeModifier", "*");
525     break;
526   case ArrayType::Static:
527     JOS.attribute("sizeModifier", "static");
528     break;
529   case ArrayType::Normal:
530     break;
531   }
532 
533   std::string Str = AT->getIndexTypeQualifiers().getAsString();
534   if (!Str.empty())
535     JOS.attribute("indexTypeQualifiers", Str);
536 }
537 
538 void JSONNodeDumper::VisitConstantArrayType(const ConstantArrayType *CAT) {
539   // FIXME: this should use ZExt instead of SExt, but JSON doesn't allow a
540   // narrowing conversion to int64_t so it cannot be expressed.
541   JOS.attribute("size", CAT->getSize().getSExtValue());
542   VisitArrayType(CAT);
543 }
544 
545 void JSONNodeDumper::VisitDependentSizedExtVectorType(
546     const DependentSizedExtVectorType *VT) {
547   JOS.attributeObject(
548       "attrLoc", [VT, this] { writeSourceLocation(VT->getAttributeLoc()); });
549 }
550 
551 void JSONNodeDumper::VisitVectorType(const VectorType *VT) {
552   JOS.attribute("numElements", VT->getNumElements());
553   switch (VT->getVectorKind()) {
554   case VectorType::GenericVector:
555     break;
556   case VectorType::AltiVecVector:
557     JOS.attribute("vectorKind", "altivec");
558     break;
559   case VectorType::AltiVecPixel:
560     JOS.attribute("vectorKind", "altivec pixel");
561     break;
562   case VectorType::AltiVecBool:
563     JOS.attribute("vectorKind", "altivec bool");
564     break;
565   case VectorType::NeonVector:
566     JOS.attribute("vectorKind", "neon");
567     break;
568   case VectorType::NeonPolyVector:
569     JOS.attribute("vectorKind", "neon poly");
570     break;
571   }
572 }
573 
574 void JSONNodeDumper::VisitUnresolvedUsingType(const UnresolvedUsingType *UUT) {
575   JOS.attribute("decl", createBareDeclRef(UUT->getDecl()));
576 }
577 
578 void JSONNodeDumper::VisitUnaryTransformType(const UnaryTransformType *UTT) {
579   switch (UTT->getUTTKind()) {
580   case UnaryTransformType::EnumUnderlyingType:
581     JOS.attribute("transformKind", "underlying_type");
582     break;
583   }
584 }
585 
586 void JSONNodeDumper::VisitTagType(const TagType *TT) {
587   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
588 }
589 
590 void JSONNodeDumper::VisitTemplateTypeParmType(
591     const TemplateTypeParmType *TTPT) {
592   JOS.attribute("depth", TTPT->getDepth());
593   JOS.attribute("index", TTPT->getIndex());
594   attributeOnlyIfTrue("isPack", TTPT->isParameterPack());
595   JOS.attribute("decl", createBareDeclRef(TTPT->getDecl()));
596 }
597 
598 void JSONNodeDumper::VisitAutoType(const AutoType *AT) {
599   JOS.attribute("undeduced", !AT->isDeduced());
600   switch (AT->getKeyword()) {
601   case AutoTypeKeyword::Auto:
602     JOS.attribute("typeKeyword", "auto");
603     break;
604   case AutoTypeKeyword::DecltypeAuto:
605     JOS.attribute("typeKeyword", "decltype(auto)");
606     break;
607   case AutoTypeKeyword::GNUAutoType:
608     JOS.attribute("typeKeyword", "__auto_type");
609     break;
610   }
611 }
612 
613 void JSONNodeDumper::VisitTemplateSpecializationType(
614     const TemplateSpecializationType *TST) {
615   attributeOnlyIfTrue("isAlias", TST->isTypeAlias());
616 
617   std::string Str;
618   llvm::raw_string_ostream OS(Str);
619   TST->getTemplateName().print(OS, PrintPolicy);
620   JOS.attribute("templateName", OS.str());
621 }
622 
623 void JSONNodeDumper::VisitInjectedClassNameType(
624     const InjectedClassNameType *ICNT) {
625   JOS.attribute("decl", createBareDeclRef(ICNT->getDecl()));
626 }
627 
628 void JSONNodeDumper::VisitObjCInterfaceType(const ObjCInterfaceType *OIT) {
629   JOS.attribute("decl", createBareDeclRef(OIT->getDecl()));
630 }
631 
632 void JSONNodeDumper::VisitPackExpansionType(const PackExpansionType *PET) {
633   if (llvm::Optional<unsigned> N = PET->getNumExpansions())
634     JOS.attribute("numExpansions", *N);
635 }
636 
637 void JSONNodeDumper::VisitElaboratedType(const ElaboratedType *ET) {
638   if (const NestedNameSpecifier *NNS = ET->getQualifier()) {
639     std::string Str;
640     llvm::raw_string_ostream OS(Str);
641     NNS->print(OS, PrintPolicy, /*ResolveTemplateArgs*/ true);
642     JOS.attribute("qualifier", OS.str());
643   }
644   if (const TagDecl *TD = ET->getOwnedTagDecl())
645     JOS.attribute("ownedTagDecl", createBareDeclRef(TD));
646 }
647 
648 void JSONNodeDumper::VisitMacroQualifiedType(const MacroQualifiedType *MQT) {
649   JOS.attribute("macroName", MQT->getMacroIdentifier()->getName());
650 }
651 
652 void JSONNodeDumper::VisitMemberPointerType(const MemberPointerType *MPT) {
653   attributeOnlyIfTrue("isData", MPT->isMemberDataPointer());
654   attributeOnlyIfTrue("isFunction", MPT->isMemberFunctionPointer());
655 }
656 
657 void JSONNodeDumper::VisitNamedDecl(const NamedDecl *ND) {
658   if (ND && ND->getDeclName())
659     JOS.attribute("name", ND->getNameAsString());
660 }
661 
662 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
663   VisitNamedDecl(TD);
664   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
665 }
666 
667 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
668   VisitNamedDecl(TAD);
669   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
670 }
671 
672 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
673   VisitNamedDecl(ND);
674   attributeOnlyIfTrue("isInline", ND->isInline());
675   if (!ND->isOriginalNamespace())
676     JOS.attribute("originalNamespace",
677                   createBareDeclRef(ND->getOriginalNamespace()));
678 }
679 
680 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
681   JOS.attribute("nominatedNamespace",
682                 createBareDeclRef(UDD->getNominatedNamespace()));
683 }
684 
685 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
686   VisitNamedDecl(NAD);
687   JOS.attribute("aliasedNamespace",
688                 createBareDeclRef(NAD->getAliasedNamespace()));
689 }
690 
691 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
692   std::string Name;
693   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
694     llvm::raw_string_ostream SOS(Name);
695     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
696   }
697   Name += UD->getNameAsString();
698   JOS.attribute("name", Name);
699 }
700 
701 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
702   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
703 }
704 
705 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
706   VisitNamedDecl(VD);
707   JOS.attribute("type", createQualType(VD->getType()));
708 
709   StorageClass SC = VD->getStorageClass();
710   if (SC != SC_None)
711     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
712   switch (VD->getTLSKind()) {
713   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
714   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
715   case VarDecl::TLS_None: break;
716   }
717   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
718   attributeOnlyIfTrue("inline", VD->isInline());
719   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
720   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
721   if (VD->hasInit()) {
722     switch (VD->getInitStyle()) {
723     case VarDecl::CInit: JOS.attribute("init", "c");  break;
724     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
725     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
726     }
727   }
728   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
729 }
730 
731 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
732   VisitNamedDecl(FD);
733   JOS.attribute("type", createQualType(FD->getType()));
734   attributeOnlyIfTrue("mutable", FD->isMutable());
735   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
736   attributeOnlyIfTrue("isBitfield", FD->isBitField());
737   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
738 }
739 
740 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
741   VisitNamedDecl(FD);
742   JOS.attribute("type", createQualType(FD->getType()));
743   StorageClass SC = FD->getStorageClass();
744   if (SC != SC_None)
745     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
746   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
747   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
748   attributeOnlyIfTrue("pure", FD->isPure());
749   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
750   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
751   attributeOnlyIfTrue("variadic", FD->isVariadic());
752 
753   if (FD->isDefaulted())
754     JOS.attribute("explicitlyDefaulted",
755                   FD->isDeleted() ? "deleted" : "default");
756 }
757 
758 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
759   VisitNamedDecl(ED);
760   if (ED->isFixed())
761     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
762   if (ED->isScoped())
763     JOS.attribute("scopedEnumTag",
764                   ED->isScopedUsingClassTag() ? "class" : "struct");
765 }
766 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
767   VisitNamedDecl(ECD);
768   JOS.attribute("type", createQualType(ECD->getType()));
769 }
770 
771 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
772   VisitNamedDecl(RD);
773   JOS.attribute("tagUsed", RD->getKindName());
774   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
775 }
776 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
777   VisitRecordDecl(RD);
778 
779   // All other information requires a complete definition.
780   if (!RD->isCompleteDefinition())
781     return;
782 
783   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
784   if (RD->getNumBases()) {
785     JOS.attributeArray("bases", [this, RD] {
786       for (const auto &Spec : RD->bases())
787         JOS.value(createCXXBaseSpecifier(Spec));
788     });
789   }
790 }
791 
792 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
793   VisitNamedDecl(D);
794   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
795   JOS.attribute("depth", D->getDepth());
796   JOS.attribute("index", D->getIndex());
797   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
798 
799   if (D->hasDefaultArgument())
800     JOS.attributeObject("defaultArg", [=] {
801       Visit(D->getDefaultArgument(), SourceRange(),
802             D->getDefaultArgStorage().getInheritedFrom(),
803             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
804     });
805 }
806 
807 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
808     const NonTypeTemplateParmDecl *D) {
809   VisitNamedDecl(D);
810   JOS.attribute("type", createQualType(D->getType()));
811   JOS.attribute("depth", D->getDepth());
812   JOS.attribute("index", D->getIndex());
813   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
814 
815   if (D->hasDefaultArgument())
816     JOS.attributeObject("defaultArg", [=] {
817       Visit(D->getDefaultArgument(), SourceRange(),
818             D->getDefaultArgStorage().getInheritedFrom(),
819             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
820     });
821 }
822 
823 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
824     const TemplateTemplateParmDecl *D) {
825   VisitNamedDecl(D);
826   JOS.attribute("depth", D->getDepth());
827   JOS.attribute("index", D->getIndex());
828   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
829 
830   if (D->hasDefaultArgument())
831     JOS.attributeObject("defaultArg", [=] {
832       Visit(D->getDefaultArgument().getArgument(),
833             D->getDefaultArgStorage().getInheritedFrom()->getSourceRange(),
834             D->getDefaultArgStorage().getInheritedFrom(),
835             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
836     });
837 }
838 
839 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
840   StringRef Lang;
841   switch (LSD->getLanguage()) {
842   case LinkageSpecDecl::lang_c: Lang = "C"; break;
843   case LinkageSpecDecl::lang_cxx: Lang = "C++"; break;
844   }
845   JOS.attribute("language", Lang);
846   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
847 }
848 
849 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
850   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
851 }
852 
853 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
854   if (const TypeSourceInfo *T = FD->getFriendType())
855     JOS.attribute("type", createQualType(T->getType()));
856 }
857 
858 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
859   VisitNamedDecl(D);
860   JOS.attribute("type", createQualType(D->getType()));
861   attributeOnlyIfTrue("synthesized", D->getSynthesize());
862   switch (D->getAccessControl()) {
863   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
864   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
865   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
866   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
867   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
868   }
869 }
870 
871 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
872   VisitNamedDecl(D);
873   JOS.attribute("returnType", createQualType(D->getReturnType()));
874   JOS.attribute("instance", D->isInstanceMethod());
875   attributeOnlyIfTrue("variadic", D->isVariadic());
876 }
877 
878 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
879   VisitNamedDecl(D);
880   JOS.attribute("type", createQualType(D->getUnderlyingType()));
881   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
882   switch (D->getVariance()) {
883   case ObjCTypeParamVariance::Invariant:
884     break;
885   case ObjCTypeParamVariance::Covariant:
886     JOS.attribute("variance", "covariant");
887     break;
888   case ObjCTypeParamVariance::Contravariant:
889     JOS.attribute("variance", "contravariant");
890     break;
891   }
892 }
893 
894 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
895   VisitNamedDecl(D);
896   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
897   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
898 
899   llvm::json::Array Protocols;
900   for (const auto* P : D->protocols())
901     Protocols.push_back(createBareDeclRef(P));
902   if (!Protocols.empty())
903     JOS.attribute("protocols", std::move(Protocols));
904 }
905 
906 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
907   VisitNamedDecl(D);
908   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
909   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
910 }
911 
912 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
913   VisitNamedDecl(D);
914 
915   llvm::json::Array Protocols;
916   for (const auto *P : D->protocols())
917     Protocols.push_back(createBareDeclRef(P));
918   if (!Protocols.empty())
919     JOS.attribute("protocols", std::move(Protocols));
920 }
921 
922 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
923   VisitNamedDecl(D);
924   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
925   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
926 
927   llvm::json::Array Protocols;
928   for (const auto* P : D->protocols())
929     Protocols.push_back(createBareDeclRef(P));
930   if (!Protocols.empty())
931     JOS.attribute("protocols", std::move(Protocols));
932 }
933 
934 void JSONNodeDumper::VisitObjCImplementationDecl(
935     const ObjCImplementationDecl *D) {
936   VisitNamedDecl(D);
937   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
938   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
939 }
940 
941 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
942     const ObjCCompatibleAliasDecl *D) {
943   VisitNamedDecl(D);
944   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
945 }
946 
947 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
948   VisitNamedDecl(D);
949   JOS.attribute("type", createQualType(D->getType()));
950 
951   switch (D->getPropertyImplementation()) {
952   case ObjCPropertyDecl::None: break;
953   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
954   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
955   }
956 
957   ObjCPropertyDecl::PropertyAttributeKind Attrs = D->getPropertyAttributes();
958   if (Attrs != ObjCPropertyDecl::OBJC_PR_noattr) {
959     if (Attrs & ObjCPropertyDecl::OBJC_PR_getter)
960       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
961     if (Attrs & ObjCPropertyDecl::OBJC_PR_setter)
962       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
963     attributeOnlyIfTrue("readonly", Attrs & ObjCPropertyDecl::OBJC_PR_readonly);
964     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyDecl::OBJC_PR_assign);
965     attributeOnlyIfTrue("readwrite",
966                         Attrs & ObjCPropertyDecl::OBJC_PR_readwrite);
967     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyDecl::OBJC_PR_retain);
968     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyDecl::OBJC_PR_copy);
969     attributeOnlyIfTrue("nonatomic",
970                         Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic);
971     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyDecl::OBJC_PR_atomic);
972     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyDecl::OBJC_PR_weak);
973     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyDecl::OBJC_PR_strong);
974     attributeOnlyIfTrue("unsafe_unretained",
975                         Attrs & ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
976     attributeOnlyIfTrue("class", Attrs & ObjCPropertyDecl::OBJC_PR_class);
977     attributeOnlyIfTrue("nullability",
978                         Attrs & ObjCPropertyDecl::OBJC_PR_nullability);
979     attributeOnlyIfTrue("null_resettable",
980                         Attrs & ObjCPropertyDecl::OBJC_PR_null_resettable);
981   }
982 }
983 
984 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
985   VisitNamedDecl(D->getPropertyDecl());
986   JOS.attribute("implKind", D->getPropertyImplementation() ==
987                                     ObjCPropertyImplDecl::Synthesize
988                                 ? "synthesize"
989                                 : "dynamic");
990   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
991   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
992 }
993 
994 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
995   attributeOnlyIfTrue("variadic", D->isVariadic());
996   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
997 }
998 
999 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1000   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1001 }
1002 
1003 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1004   std::string Str;
1005   llvm::raw_string_ostream OS(Str);
1006 
1007   OME->getSelector().print(OS);
1008   JOS.attribute("selector", OS.str());
1009 
1010   switch (OME->getReceiverKind()) {
1011   case ObjCMessageExpr::Instance:
1012     JOS.attribute("receiverKind", "instance");
1013     break;
1014   case ObjCMessageExpr::Class:
1015     JOS.attribute("receiverKind", "class");
1016     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1017     break;
1018   case ObjCMessageExpr::SuperInstance:
1019     JOS.attribute("receiverKind", "super (instance)");
1020     JOS.attribute("superType", createQualType(OME->getSuperType()));
1021     break;
1022   case ObjCMessageExpr::SuperClass:
1023     JOS.attribute("receiverKind", "super (class)");
1024     JOS.attribute("superType", createQualType(OME->getSuperType()));
1025     break;
1026   }
1027 
1028   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1029   if (OME->getType() != CallReturnTy)
1030     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1031 }
1032 
1033 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1034   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1035     std::string Str;
1036     llvm::raw_string_ostream OS(Str);
1037 
1038     MD->getSelector().print(OS);
1039     JOS.attribute("selector", OS.str());
1040   }
1041 }
1042 
1043 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1044   std::string Str;
1045   llvm::raw_string_ostream OS(Str);
1046 
1047   OSE->getSelector().print(OS);
1048   JOS.attribute("selector", OS.str());
1049 }
1050 
1051 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1052   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1053 }
1054 
1055 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1056   if (OPRE->isImplicitProperty()) {
1057     JOS.attribute("propertyKind", "implicit");
1058     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1059       JOS.attribute("getter", createBareDeclRef(MD));
1060     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1061       JOS.attribute("setter", createBareDeclRef(MD));
1062   } else {
1063     JOS.attribute("propertyKind", "explicit");
1064     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1065   }
1066 
1067   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1068   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1069   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1070 }
1071 
1072 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1073     const ObjCSubscriptRefExpr *OSRE) {
1074   JOS.attribute("subscriptKind",
1075                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1076 
1077   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1078     JOS.attribute("getter", createBareDeclRef(MD));
1079   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1080     JOS.attribute("setter", createBareDeclRef(MD));
1081 }
1082 
1083 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1084   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1085   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1086   JOS.attribute("isArrow", OIRE->isArrow());
1087 }
1088 
1089 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1090   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1091 }
1092 
1093 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1094   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1095   if (DRE->getDecl() != DRE->getFoundDecl())
1096     JOS.attribute("foundReferencedDecl",
1097                   createBareDeclRef(DRE->getFoundDecl()));
1098   switch (DRE->isNonOdrUse()) {
1099   case NOUR_None: break;
1100   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1101   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1102   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1103   }
1104 }
1105 
1106 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1107   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1108 }
1109 
1110 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1111   JOS.attribute("isPostfix", UO->isPostfix());
1112   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1113   if (!UO->canOverflow())
1114     JOS.attribute("canOverflow", false);
1115 }
1116 
1117 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1118   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1119 }
1120 
1121 void JSONNodeDumper::VisitCompoundAssignOperator(
1122     const CompoundAssignOperator *CAO) {
1123   VisitBinaryOperator(CAO);
1124   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1125   JOS.attribute("computeResultType",
1126                 createQualType(CAO->getComputationResultType()));
1127 }
1128 
1129 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1130   // Note, we always write this Boolean field because the information it conveys
1131   // is critical to understanding the AST node.
1132   ValueDecl *VD = ME->getMemberDecl();
1133   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1134   JOS.attribute("isArrow", ME->isArrow());
1135   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1136   switch (ME->isNonOdrUse()) {
1137   case NOUR_None: break;
1138   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1139   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1140   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1141   }
1142 }
1143 
1144 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1145   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1146   attributeOnlyIfTrue("isArray", NE->isArray());
1147   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1148   switch (NE->getInitializationStyle()) {
1149   case CXXNewExpr::NoInit: break;
1150   case CXXNewExpr::CallInit: JOS.attribute("initStyle", "call"); break;
1151   case CXXNewExpr::ListInit: JOS.attribute("initStyle", "list"); break;
1152   }
1153   if (const FunctionDecl *FD = NE->getOperatorNew())
1154     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1155   if (const FunctionDecl *FD = NE->getOperatorDelete())
1156     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1157 }
1158 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1159   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1160   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1161   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1162   if (const FunctionDecl *FD = DE->getOperatorDelete())
1163     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1164 }
1165 
1166 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1167   attributeOnlyIfTrue("implicit", TE->isImplicit());
1168 }
1169 
1170 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1171   JOS.attribute("castKind", CE->getCastKindName());
1172   llvm::json::Array Path = createCastPath(CE);
1173   if (!Path.empty())
1174     JOS.attribute("path", std::move(Path));
1175   // FIXME: This may not be useful information as it can be obtusely gleaned
1176   // from the inner[] array.
1177   if (const NamedDecl *ND = CE->getConversionFunction())
1178     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1179 }
1180 
1181 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1182   VisitCastExpr(ICE);
1183   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1184 }
1185 
1186 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1187   attributeOnlyIfTrue("adl", CE->usesADL());
1188 }
1189 
1190 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1191     const UnaryExprOrTypeTraitExpr *TTE) {
1192   switch (TTE->getKind()) {
1193   case UETT_SizeOf: JOS.attribute("name", "sizeof"); break;
1194   case UETT_AlignOf: JOS.attribute("name", "alignof"); break;
1195   case UETT_VecStep:  JOS.attribute("name", "vec_step"); break;
1196   case UETT_PreferredAlignOf:  JOS.attribute("name", "__alignof"); break;
1197   case UETT_OpenMPRequiredSimdAlign:
1198     JOS.attribute("name", "__builtin_omp_required_simd_align"); break;
1199   }
1200   if (TTE->isArgumentType())
1201     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1202 }
1203 
1204 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1205   VisitNamedDecl(SOPE->getPack());
1206 }
1207 
1208 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1209     const UnresolvedLookupExpr *ULE) {
1210   JOS.attribute("usesADL", ULE->requiresADL());
1211   JOS.attribute("name", ULE->getName().getAsString());
1212 
1213   JOS.attributeArray("lookups", [this, ULE] {
1214     for (const NamedDecl *D : ULE->decls())
1215       JOS.value(createBareDeclRef(D));
1216   });
1217 }
1218 
1219 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1220   JOS.attribute("name", ALE->getLabel()->getName());
1221   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1222 }
1223 
1224 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1225   if (CTE->isTypeOperand()) {
1226     QualType Adjusted = CTE->getTypeOperand(Ctx);
1227     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1228     JOS.attribute("typeArg", createQualType(Unadjusted));
1229     if (Adjusted != Unadjusted)
1230       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1231   }
1232 }
1233 
1234 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1235   if (CE->getResultAPValueKind() != APValue::None) {
1236     std::string Str;
1237     llvm::raw_string_ostream OS(Str);
1238     CE->getAPValueResult().printPretty(OS, Ctx, CE->getType());
1239     JOS.attribute("value", OS.str());
1240   }
1241 }
1242 
1243 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1244   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1245     JOS.attribute("field", createBareDeclRef(FD));
1246 }
1247 
1248 void JSONNodeDumper::VisitGenericSelectionExpr(
1249     const GenericSelectionExpr *GSE) {
1250   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1251 }
1252 
1253 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1254     const CXXUnresolvedConstructExpr *UCE) {
1255   if (UCE->getType() != UCE->getTypeAsWritten())
1256     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1257   attributeOnlyIfTrue("list", UCE->isListInitialization());
1258 }
1259 
1260 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1261   CXXConstructorDecl *Ctor = CE->getConstructor();
1262   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1263   attributeOnlyIfTrue("elidable", CE->isElidable());
1264   attributeOnlyIfTrue("list", CE->isListInitialization());
1265   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1266   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1267   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1268 
1269   switch (CE->getConstructionKind()) {
1270   case CXXConstructExpr::CK_Complete:
1271     JOS.attribute("constructionKind", "complete");
1272     break;
1273   case CXXConstructExpr::CK_Delegating:
1274     JOS.attribute("constructionKind", "delegating");
1275     break;
1276   case CXXConstructExpr::CK_NonVirtualBase:
1277     JOS.attribute("constructionKind", "non-virtual base");
1278     break;
1279   case CXXConstructExpr::CK_VirtualBase:
1280     JOS.attribute("constructionKind", "virtual base");
1281     break;
1282   }
1283 }
1284 
1285 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1286   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1287                       EWC->cleanupsHaveSideEffects());
1288   if (EWC->getNumObjects()) {
1289     JOS.attributeArray("cleanups", [this, EWC] {
1290       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1291         JOS.value(createBareDeclRef(CO));
1292     });
1293   }
1294 }
1295 
1296 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1297     const CXXBindTemporaryExpr *BTE) {
1298   const CXXTemporary *Temp = BTE->getTemporary();
1299   JOS.attribute("temp", createPointerRepresentation(Temp));
1300   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1301     JOS.attribute("dtor", createBareDeclRef(Dtor));
1302 }
1303 
1304 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1305     const MaterializeTemporaryExpr *MTE) {
1306   if (const ValueDecl *VD = MTE->getExtendingDecl())
1307     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1308 
1309   switch (MTE->getStorageDuration()) {
1310   case SD_Automatic:
1311     JOS.attribute("storageDuration", "automatic");
1312     break;
1313   case SD_Dynamic:
1314     JOS.attribute("storageDuration", "dynamic");
1315     break;
1316   case SD_FullExpression:
1317     JOS.attribute("storageDuration", "full expression");
1318     break;
1319   case SD_Static:
1320     JOS.attribute("storageDuration", "static");
1321     break;
1322   case SD_Thread:
1323     JOS.attribute("storageDuration", "thread");
1324     break;
1325   }
1326 
1327   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1328 }
1329 
1330 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1331     const CXXDependentScopeMemberExpr *DSME) {
1332   JOS.attribute("isArrow", DSME->isArrow());
1333   JOS.attribute("member", DSME->getMember().getAsString());
1334   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1335   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1336                       DSME->hasExplicitTemplateArgs());
1337 
1338   if (DSME->getNumTemplateArgs()) {
1339     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1340       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1341         JOS.object(
1342             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1343     });
1344   }
1345 }
1346 
1347 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1348   JOS.attribute("value",
1349                 IL->getValue().toString(
1350                     /*Radix=*/10, IL->getType()->isSignedIntegerType()));
1351 }
1352 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1353   // FIXME: This should probably print the character literal as a string,
1354   // rather than as a numerical value. It would be nice if the behavior matched
1355   // what we do to print a string literal; right now, it is impossible to tell
1356   // the difference between 'a' and L'a' in C from the JSON output.
1357   JOS.attribute("value", CL->getValue());
1358 }
1359 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1360   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1361 }
1362 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1363   llvm::SmallVector<char, 16> Buffer;
1364   FL->getValue().toString(Buffer);
1365   JOS.attribute("value", Buffer);
1366 }
1367 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1368   std::string Buffer;
1369   llvm::raw_string_ostream SS(Buffer);
1370   SL->outputString(SS);
1371   JOS.attribute("value", SS.str());
1372 }
1373 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1374   JOS.attribute("value", BLE->getValue());
1375 }
1376 
1377 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1378   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1379   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1380   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1381   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1382 }
1383 
1384 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1385   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1386   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1387 }
1388 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1389   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1390 }
1391 
1392 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1393   JOS.attribute("name", LS->getName());
1394   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1395 }
1396 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1397   JOS.attribute("targetLabelDeclId",
1398                 createPointerRepresentation(GS->getLabel()));
1399 }
1400 
1401 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1402   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1403 }
1404 
1405 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1406   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1407   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1408   // null child node and ObjC gets no child node.
1409   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1410 }
1411 
1412 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1413   JOS.attribute("isNull", true);
1414 }
1415 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1416   JOS.attribute("type", createQualType(TA.getAsType()));
1417 }
1418 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1419     const TemplateArgument &TA) {
1420   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1421 }
1422 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1423   JOS.attribute("isNullptr", true);
1424 }
1425 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1426   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1427 }
1428 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1429   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1430   // the output format.
1431 }
1432 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1433     const TemplateArgument &TA) {
1434   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1435   // the output format.
1436 }
1437 void JSONNodeDumper::VisitExpressionTemplateArgument(
1438     const TemplateArgument &TA) {
1439   JOS.attribute("isExpr", true);
1440 }
1441 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1442   JOS.attribute("isPack", true);
1443 }
1444 
1445 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1446   if (Traits)
1447     return Traits->getCommandInfo(CommandID)->Name;
1448   if (const comments::CommandInfo *Info =
1449           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1450     return Info->Name;
1451   return "<invalid>";
1452 }
1453 
1454 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1455                                       const comments::FullComment *) {
1456   JOS.attribute("text", C->getText());
1457 }
1458 
1459 void JSONNodeDumper::visitInlineCommandComment(
1460     const comments::InlineCommandComment *C, const comments::FullComment *) {
1461   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1462 
1463   switch (C->getRenderKind()) {
1464   case comments::InlineCommandComment::RenderNormal:
1465     JOS.attribute("renderKind", "normal");
1466     break;
1467   case comments::InlineCommandComment::RenderBold:
1468     JOS.attribute("renderKind", "bold");
1469     break;
1470   case comments::InlineCommandComment::RenderEmphasized:
1471     JOS.attribute("renderKind", "emphasized");
1472     break;
1473   case comments::InlineCommandComment::RenderMonospaced:
1474     JOS.attribute("renderKind", "monospaced");
1475     break;
1476   }
1477 
1478   llvm::json::Array Args;
1479   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1480     Args.push_back(C->getArgText(I));
1481 
1482   if (!Args.empty())
1483     JOS.attribute("args", std::move(Args));
1484 }
1485 
1486 void JSONNodeDumper::visitHTMLStartTagComment(
1487     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1488   JOS.attribute("name", C->getTagName());
1489   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1490   attributeOnlyIfTrue("malformed", C->isMalformed());
1491 
1492   llvm::json::Array Attrs;
1493   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1494     Attrs.push_back(
1495         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1496 
1497   if (!Attrs.empty())
1498     JOS.attribute("attrs", std::move(Attrs));
1499 }
1500 
1501 void JSONNodeDumper::visitHTMLEndTagComment(
1502     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1503   JOS.attribute("name", C->getTagName());
1504 }
1505 
1506 void JSONNodeDumper::visitBlockCommandComment(
1507     const comments::BlockCommandComment *C, const comments::FullComment *) {
1508   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1509 
1510   llvm::json::Array Args;
1511   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1512     Args.push_back(C->getArgText(I));
1513 
1514   if (!Args.empty())
1515     JOS.attribute("args", std::move(Args));
1516 }
1517 
1518 void JSONNodeDumper::visitParamCommandComment(
1519     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1520   switch (C->getDirection()) {
1521   case comments::ParamCommandComment::In:
1522     JOS.attribute("direction", "in");
1523     break;
1524   case comments::ParamCommandComment::Out:
1525     JOS.attribute("direction", "out");
1526     break;
1527   case comments::ParamCommandComment::InOut:
1528     JOS.attribute("direction", "in,out");
1529     break;
1530   }
1531   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1532 
1533   if (C->hasParamName())
1534     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1535                                                   : C->getParamNameAsWritten());
1536 
1537   if (C->isParamIndexValid() && !C->isVarArgParam())
1538     JOS.attribute("paramIdx", C->getParamIndex());
1539 }
1540 
1541 void JSONNodeDumper::visitTParamCommandComment(
1542     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1543   if (C->hasParamName())
1544     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1545                                                 : C->getParamNameAsWritten());
1546   if (C->isPositionValid()) {
1547     llvm::json::Array Positions;
1548     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1549       Positions.push_back(C->getIndex(I));
1550 
1551     if (!Positions.empty())
1552       JOS.attribute("positions", std::move(Positions));
1553   }
1554 }
1555 
1556 void JSONNodeDumper::visitVerbatimBlockComment(
1557     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1558   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1559   JOS.attribute("closeName", C->getCloseName());
1560 }
1561 
1562 void JSONNodeDumper::visitVerbatimBlockLineComment(
1563     const comments::VerbatimBlockLineComment *C,
1564     const comments::FullComment *) {
1565   JOS.attribute("text", C->getText());
1566 }
1567 
1568 void JSONNodeDumper::visitVerbatimLineComment(
1569     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1570   JOS.attribute("text", C->getText());
1571 }
1572