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 
70   if (!T)
71     return;
72 
73   JOS.attribute("kind", (llvm::Twine(T->getTypeClassName()) + "Type").str());
74   JOS.attribute("type", createQualType(QualType(T, 0), /*Desugar*/ false));
75   attributeOnlyIfTrue("isDependent", T->isDependentType());
76   attributeOnlyIfTrue("isInstantiationDependent",
77                       T->isInstantiationDependentType());
78   attributeOnlyIfTrue("isVariablyModified", T->isVariablyModifiedType());
79   attributeOnlyIfTrue("containsUnexpandedPack",
80                       T->containsUnexpandedParameterPack());
81   attributeOnlyIfTrue("isImported", T->isFromAST());
82   InnerTypeVisitor::Visit(T);
83 }
84 
85 void JSONNodeDumper::Visit(QualType T) {
86   JOS.attribute("id", createPointerRepresentation(T.getAsOpaquePtr()));
87   JOS.attribute("kind", "QualType");
88   JOS.attribute("type", createQualType(T));
89   JOS.attribute("qualifiers", T.split().Quals.getAsString());
90 }
91 
92 void JSONNodeDumper::Visit(const Decl *D) {
93   JOS.attribute("id", createPointerRepresentation(D));
94 
95   if (!D)
96     return;
97 
98   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
99   JOS.attributeObject("loc",
100                       [D, this] { writeSourceLocation(D->getLocation()); });
101   JOS.attributeObject("range",
102                       [D, this] { writeSourceRange(D->getSourceRange()); });
103   attributeOnlyIfTrue("isImplicit", D->isImplicit());
104   attributeOnlyIfTrue("isInvalid", D->isInvalidDecl());
105 
106   if (D->isUsed())
107     JOS.attribute("isUsed", true);
108   else if (D->isThisDeclarationReferenced())
109     JOS.attribute("isReferenced", true);
110 
111   if (const auto *ND = dyn_cast<NamedDecl>(D))
112     attributeOnlyIfTrue("isHidden", ND->isHidden());
113 
114   if (D->getLexicalDeclContext() != D->getDeclContext()) {
115     // Because of multiple inheritance, a DeclContext pointer does not produce
116     // the same pointer representation as a Decl pointer that references the
117     // same AST Node.
118     const auto *ParentDeclContextDecl = dyn_cast<Decl>(D->getDeclContext());
119     JOS.attribute("parentDeclContextId",
120                   createPointerRepresentation(ParentDeclContextDecl));
121   }
122 
123   addPreviousDeclaration(D);
124   InnerDeclVisitor::Visit(D);
125 }
126 
127 void JSONNodeDumper::Visit(const comments::Comment *C,
128                            const comments::FullComment *FC) {
129   if (!C)
130     return;
131 
132   JOS.attribute("id", createPointerRepresentation(C));
133   JOS.attribute("kind", C->getCommentKindName());
134   JOS.attributeObject("loc",
135                       [C, this] { writeSourceLocation(C->getLocation()); });
136   JOS.attributeObject("range",
137                       [C, this] { writeSourceRange(C->getSourceRange()); });
138 
139   InnerCommentVisitor::visit(C, FC);
140 }
141 
142 void JSONNodeDumper::Visit(const TemplateArgument &TA, SourceRange R,
143                            const Decl *From, StringRef Label) {
144   JOS.attribute("kind", "TemplateArgument");
145   if (R.isValid())
146     JOS.attributeObject("range", [R, this] { writeSourceRange(R); });
147 
148   if (From)
149     JOS.attribute(Label.empty() ? "fromDecl" : Label, createBareDeclRef(From));
150 
151   InnerTemplateArgVisitor::Visit(TA);
152 }
153 
154 void JSONNodeDumper::Visit(const CXXCtorInitializer *Init) {
155   JOS.attribute("kind", "CXXCtorInitializer");
156   if (Init->isAnyMemberInitializer())
157     JOS.attribute("anyInit", createBareDeclRef(Init->getAnyMember()));
158   else if (Init->isBaseInitializer())
159     JOS.attribute("baseInit",
160                   createQualType(QualType(Init->getBaseClass(), 0)));
161   else if (Init->isDelegatingInitializer())
162     JOS.attribute("delegatingInit",
163                   createQualType(Init->getTypeSourceInfo()->getType()));
164   else
165     llvm_unreachable("Unknown initializer type");
166 }
167 
168 void JSONNodeDumper::Visit(const OMPClause *C) {}
169 
170 void JSONNodeDumper::Visit(const BlockDecl::Capture &C) {
171   JOS.attribute("kind", "Capture");
172   attributeOnlyIfTrue("byref", C.isByRef());
173   attributeOnlyIfTrue("nested", C.isNested());
174   if (C.getVariable())
175     JOS.attribute("var", createBareDeclRef(C.getVariable()));
176 }
177 
178 void JSONNodeDumper::Visit(const GenericSelectionExpr::ConstAssociation &A) {
179   JOS.attribute("associationKind", A.getTypeSourceInfo() ? "case" : "default");
180   attributeOnlyIfTrue("selected", A.isSelected());
181 }
182 
183 void JSONNodeDumper::writeIncludeStack(PresumedLoc Loc, bool JustFirst) {
184   if (Loc.isInvalid())
185     return;
186 
187   JOS.attributeBegin("includedFrom");
188   JOS.objectBegin();
189 
190   if (!JustFirst) {
191     // Walk the stack recursively, then print out the presumed location.
192     writeIncludeStack(SM.getPresumedLoc(Loc.getIncludeLoc()));
193   }
194 
195   JOS.attribute("file", Loc.getFilename());
196   JOS.objectEnd();
197   JOS.attributeEnd();
198 }
199 
200 void JSONNodeDumper::writeBareSourceLocation(SourceLocation Loc,
201                                              bool IsSpelling) {
202   PresumedLoc Presumed = SM.getPresumedLoc(Loc);
203   unsigned ActualLine = IsSpelling ? SM.getSpellingLineNumber(Loc)
204                                    : SM.getExpansionLineNumber(Loc);
205   if (Presumed.isValid()) {
206     JOS.attribute("offset", SM.getDecomposedLoc(Loc).second);
207     if (LastLocFilename != Presumed.getFilename()) {
208       JOS.attribute("file", Presumed.getFilename());
209       JOS.attribute("line", ActualLine);
210     } else if (LastLocLine != ActualLine)
211       JOS.attribute("line", ActualLine);
212 
213     unsigned PresumedLine = Presumed.getLine();
214     if (ActualLine != PresumedLine && LastLocPresumedLine != PresumedLine)
215       JOS.attribute("presumedLine", PresumedLine);
216 
217     JOS.attribute("col", Presumed.getColumn());
218     JOS.attribute("tokLen",
219                   Lexer::MeasureTokenLength(Loc, SM, Ctx.getLangOpts()));
220     LastLocFilename = Presumed.getFilename();
221     LastLocPresumedLine = PresumedLine;
222     LastLocLine = ActualLine;
223 
224     // Orthogonal to the file, line, and column de-duplication is whether the
225     // given location was a result of an include. If so, print where the
226     // include location came from.
227     writeIncludeStack(SM.getPresumedLoc(Presumed.getIncludeLoc()),
228                       /*JustFirst*/ true);
229   }
230 }
231 
232 void JSONNodeDumper::writeSourceLocation(SourceLocation Loc) {
233   SourceLocation Spelling = SM.getSpellingLoc(Loc);
234   SourceLocation Expansion = SM.getExpansionLoc(Loc);
235 
236   if (Expansion != Spelling) {
237     // If the expansion and the spelling are different, output subobjects
238     // describing both locations.
239     JOS.attributeObject("spellingLoc", [Spelling, this] {
240       writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
241     });
242     JOS.attributeObject("expansionLoc", [Expansion, Loc, this] {
243       writeBareSourceLocation(Expansion, /*IsSpelling*/ false);
244       // If there is a macro expansion, add extra information if the interesting
245       // bit is the macro arg expansion.
246       if (SM.isMacroArgExpansion(Loc))
247         JOS.attribute("isMacroArgExpansion", true);
248     });
249   } else
250     writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
251 }
252 
253 void JSONNodeDumper::writeSourceRange(SourceRange R) {
254   JOS.attributeObject("begin",
255                       [R, this] { writeSourceLocation(R.getBegin()); });
256   JOS.attributeObject("end", [R, this] { writeSourceLocation(R.getEnd()); });
257 }
258 
259 std::string JSONNodeDumper::createPointerRepresentation(const void *Ptr) {
260   // Because JSON stores integer values as signed 64-bit integers, trying to
261   // represent them as such makes for very ugly pointer values in the resulting
262   // output. Instead, we convert the value to hex and treat it as a string.
263   return "0x" + llvm::utohexstr(reinterpret_cast<uint64_t>(Ptr), true);
264 }
265 
266 llvm::json::Object JSONNodeDumper::createQualType(QualType QT, bool Desugar) {
267   SplitQualType SQT = QT.split();
268   llvm::json::Object Ret{{"qualType", QualType::getAsString(SQT, PrintPolicy)}};
269 
270   if (Desugar && !QT.isNull()) {
271     SplitQualType DSQT = QT.getSplitDesugaredType();
272     if (DSQT != SQT)
273       Ret["desugaredQualType"] = QualType::getAsString(DSQT, PrintPolicy);
274     if (const auto *TT = QT->getAs<TypedefType>())
275       Ret["typeAliasDeclId"] = createPointerRepresentation(TT->getDecl());
276   }
277   return Ret;
278 }
279 
280 void JSONNodeDumper::writeBareDeclRef(const Decl *D) {
281   JOS.attribute("id", createPointerRepresentation(D));
282   if (!D)
283     return;
284 
285   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
286   if (const auto *ND = dyn_cast<NamedDecl>(D))
287     JOS.attribute("name", ND->getDeclName().getAsString());
288   if (const auto *VD = dyn_cast<ValueDecl>(D))
289     JOS.attribute("type", createQualType(VD->getType()));
290 }
291 
292 llvm::json::Object JSONNodeDumper::createBareDeclRef(const Decl *D) {
293   llvm::json::Object Ret{{"id", createPointerRepresentation(D)}};
294   if (!D)
295     return Ret;
296 
297   Ret["kind"] = (llvm::Twine(D->getDeclKindName()) + "Decl").str();
298   if (const auto *ND = dyn_cast<NamedDecl>(D))
299     Ret["name"] = ND->getDeclName().getAsString();
300   if (const auto *VD = dyn_cast<ValueDecl>(D))
301     Ret["type"] = createQualType(VD->getType());
302   return Ret;
303 }
304 
305 llvm::json::Array JSONNodeDumper::createCastPath(const CastExpr *C) {
306   llvm::json::Array Ret;
307   if (C->path_empty())
308     return Ret;
309 
310   for (auto I = C->path_begin(), E = C->path_end(); I != E; ++I) {
311     const CXXBaseSpecifier *Base = *I;
312     const auto *RD =
313         cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
314 
315     llvm::json::Object Val{{"name", RD->getName()}};
316     if (Base->isVirtual())
317       Val["isVirtual"] = true;
318     Ret.push_back(std::move(Val));
319   }
320   return Ret;
321 }
322 
323 #define FIELD2(Name, Flag)  if (RD->Flag()) Ret[Name] = true
324 #define FIELD1(Flag)        FIELD2(#Flag, Flag)
325 
326 static llvm::json::Object
327 createDefaultConstructorDefinitionData(const CXXRecordDecl *RD) {
328   llvm::json::Object Ret;
329 
330   FIELD2("exists", hasDefaultConstructor);
331   FIELD2("trivial", hasTrivialDefaultConstructor);
332   FIELD2("nonTrivial", hasNonTrivialDefaultConstructor);
333   FIELD2("userProvided", hasUserProvidedDefaultConstructor);
334   FIELD2("isConstexpr", hasConstexprDefaultConstructor);
335   FIELD2("needsImplicit", needsImplicitDefaultConstructor);
336   FIELD2("defaultedIsConstexpr", defaultedDefaultConstructorIsConstexpr);
337 
338   return Ret;
339 }
340 
341 static llvm::json::Object
342 createCopyConstructorDefinitionData(const CXXRecordDecl *RD) {
343   llvm::json::Object Ret;
344 
345   FIELD2("simple", hasSimpleCopyConstructor);
346   FIELD2("trivial", hasTrivialCopyConstructor);
347   FIELD2("nonTrivial", hasNonTrivialCopyConstructor);
348   FIELD2("userDeclared", hasUserDeclaredCopyConstructor);
349   FIELD2("hasConstParam", hasCopyConstructorWithConstParam);
350   FIELD2("implicitHasConstParam", implicitCopyConstructorHasConstParam);
351   FIELD2("needsImplicit", needsImplicitCopyConstructor);
352   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyConstructor);
353   if (!RD->needsOverloadResolutionForCopyConstructor())
354     FIELD2("defaultedIsDeleted", defaultedCopyConstructorIsDeleted);
355 
356   return Ret;
357 }
358 
359 static llvm::json::Object
360 createMoveConstructorDefinitionData(const CXXRecordDecl *RD) {
361   llvm::json::Object Ret;
362 
363   FIELD2("exists", hasMoveConstructor);
364   FIELD2("simple", hasSimpleMoveConstructor);
365   FIELD2("trivial", hasTrivialMoveConstructor);
366   FIELD2("nonTrivial", hasNonTrivialMoveConstructor);
367   FIELD2("userDeclared", hasUserDeclaredMoveConstructor);
368   FIELD2("needsImplicit", needsImplicitMoveConstructor);
369   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveConstructor);
370   if (!RD->needsOverloadResolutionForMoveConstructor())
371     FIELD2("defaultedIsDeleted", defaultedMoveConstructorIsDeleted);
372 
373   return Ret;
374 }
375 
376 static llvm::json::Object
377 createCopyAssignmentDefinitionData(const CXXRecordDecl *RD) {
378   llvm::json::Object Ret;
379 
380   FIELD2("trivial", hasTrivialCopyAssignment);
381   FIELD2("nonTrivial", hasNonTrivialCopyAssignment);
382   FIELD2("hasConstParam", hasCopyAssignmentWithConstParam);
383   FIELD2("implicitHasConstParam", implicitCopyAssignmentHasConstParam);
384   FIELD2("userDeclared", hasUserDeclaredCopyAssignment);
385   FIELD2("needsImplicit", needsImplicitCopyAssignment);
386   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyAssignment);
387 
388   return Ret;
389 }
390 
391 static llvm::json::Object
392 createMoveAssignmentDefinitionData(const CXXRecordDecl *RD) {
393   llvm::json::Object Ret;
394 
395   FIELD2("exists", hasMoveAssignment);
396   FIELD2("simple", hasSimpleMoveAssignment);
397   FIELD2("trivial", hasTrivialMoveAssignment);
398   FIELD2("nonTrivial", hasNonTrivialMoveAssignment);
399   FIELD2("userDeclared", hasUserDeclaredMoveAssignment);
400   FIELD2("needsImplicit", needsImplicitMoveAssignment);
401   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveAssignment);
402 
403   return Ret;
404 }
405 
406 static llvm::json::Object
407 createDestructorDefinitionData(const CXXRecordDecl *RD) {
408   llvm::json::Object Ret;
409 
410   FIELD2("simple", hasSimpleDestructor);
411   FIELD2("irrelevant", hasIrrelevantDestructor);
412   FIELD2("trivial", hasTrivialDestructor);
413   FIELD2("nonTrivial", hasNonTrivialDestructor);
414   FIELD2("userDeclared", hasUserDeclaredDestructor);
415   FIELD2("needsImplicit", needsImplicitDestructor);
416   FIELD2("needsOverloadResolution", needsOverloadResolutionForDestructor);
417   if (!RD->needsOverloadResolutionForDestructor())
418     FIELD2("defaultedIsDeleted", defaultedDestructorIsDeleted);
419 
420   return Ret;
421 }
422 
423 llvm::json::Object
424 JSONNodeDumper::createCXXRecordDefinitionData(const CXXRecordDecl *RD) {
425   llvm::json::Object Ret;
426 
427   // This data is common to all C++ classes.
428   FIELD1(isGenericLambda);
429   FIELD1(isLambda);
430   FIELD1(isEmpty);
431   FIELD1(isAggregate);
432   FIELD1(isStandardLayout);
433   FIELD1(isTriviallyCopyable);
434   FIELD1(isPOD);
435   FIELD1(isTrivial);
436   FIELD1(isPolymorphic);
437   FIELD1(isAbstract);
438   FIELD1(isLiteral);
439   FIELD1(canPassInRegisters);
440   FIELD1(hasUserDeclaredConstructor);
441   FIELD1(hasConstexprNonCopyMoveConstructor);
442   FIELD1(hasMutableFields);
443   FIELD1(hasVariantMembers);
444   FIELD2("canConstDefaultInit", allowConstDefaultInit);
445 
446   Ret["defaultCtor"] = createDefaultConstructorDefinitionData(RD);
447   Ret["copyCtor"] = createCopyConstructorDefinitionData(RD);
448   Ret["moveCtor"] = createMoveConstructorDefinitionData(RD);
449   Ret["copyAssign"] = createCopyAssignmentDefinitionData(RD);
450   Ret["moveAssign"] = createMoveAssignmentDefinitionData(RD);
451   Ret["dtor"] = createDestructorDefinitionData(RD);
452 
453   return Ret;
454 }
455 
456 #undef FIELD1
457 #undef FIELD2
458 
459 std::string JSONNodeDumper::createAccessSpecifier(AccessSpecifier AS) {
460   switch (AS) {
461   case AS_none: return "none";
462   case AS_private: return "private";
463   case AS_protected: return "protected";
464   case AS_public: return "public";
465   }
466   llvm_unreachable("Unknown access specifier");
467 }
468 
469 llvm::json::Object
470 JSONNodeDumper::createCXXBaseSpecifier(const CXXBaseSpecifier &BS) {
471   llvm::json::Object Ret;
472 
473   Ret["type"] = createQualType(BS.getType());
474   Ret["access"] = createAccessSpecifier(BS.getAccessSpecifier());
475   Ret["writtenAccess"] =
476       createAccessSpecifier(BS.getAccessSpecifierAsWritten());
477   if (BS.isVirtual())
478     Ret["isVirtual"] = true;
479   if (BS.isPackExpansion())
480     Ret["isPackExpansion"] = true;
481 
482   return Ret;
483 }
484 
485 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
486   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
487 }
488 
489 void JSONNodeDumper::VisitFunctionType(const FunctionType *T) {
490   FunctionType::ExtInfo E = T->getExtInfo();
491   attributeOnlyIfTrue("noreturn", E.getNoReturn());
492   attributeOnlyIfTrue("producesResult", E.getProducesResult());
493   if (E.getHasRegParm())
494     JOS.attribute("regParm", E.getRegParm());
495   JOS.attribute("cc", FunctionType::getNameForCallConv(E.getCC()));
496 }
497 
498 void JSONNodeDumper::VisitFunctionProtoType(const FunctionProtoType *T) {
499   FunctionProtoType::ExtProtoInfo E = T->getExtProtoInfo();
500   attributeOnlyIfTrue("trailingReturn", E.HasTrailingReturn);
501   attributeOnlyIfTrue("const", T->isConst());
502   attributeOnlyIfTrue("volatile", T->isVolatile());
503   attributeOnlyIfTrue("restrict", T->isRestrict());
504   attributeOnlyIfTrue("variadic", E.Variadic);
505   switch (E.RefQualifier) {
506   case RQ_LValue: JOS.attribute("refQualifier", "&"); break;
507   case RQ_RValue: JOS.attribute("refQualifier", "&&"); break;
508   case RQ_None: break;
509   }
510   switch (E.ExceptionSpec.Type) {
511   case EST_DynamicNone:
512   case EST_Dynamic: {
513     JOS.attribute("exceptionSpec", "throw");
514     llvm::json::Array Types;
515     for (QualType QT : E.ExceptionSpec.Exceptions)
516       Types.push_back(createQualType(QT));
517     JOS.attribute("exceptionTypes", std::move(Types));
518   } break;
519   case EST_MSAny:
520     JOS.attribute("exceptionSpec", "throw");
521     JOS.attribute("throwsAny", true);
522     break;
523   case EST_BasicNoexcept:
524     JOS.attribute("exceptionSpec", "noexcept");
525     break;
526   case EST_NoexceptTrue:
527   case EST_NoexceptFalse:
528     JOS.attribute("exceptionSpec", "noexcept");
529     JOS.attribute("conditionEvaluatesTo",
530                 E.ExceptionSpec.Type == EST_NoexceptTrue);
531     //JOS.attributeWithCall("exceptionSpecExpr",
532     //                    [this, E]() { Visit(E.ExceptionSpec.NoexceptExpr); });
533     break;
534   case EST_NoThrow:
535     JOS.attribute("exceptionSpec", "nothrow");
536     break;
537   // FIXME: I cannot find a way to trigger these cases while dumping the AST. I
538   // suspect you can only run into them when executing an AST dump from within
539   // the debugger, which is not a use case we worry about for the JSON dumping
540   // feature.
541   case EST_DependentNoexcept:
542   case EST_Unevaluated:
543   case EST_Uninstantiated:
544   case EST_Unparsed:
545   case EST_None: break;
546   }
547   VisitFunctionType(T);
548 }
549 
550 void JSONNodeDumper::VisitRValueReferenceType(const ReferenceType *RT) {
551   attributeOnlyIfTrue("spelledAsLValue", RT->isSpelledAsLValue());
552 }
553 
554 void JSONNodeDumper::VisitArrayType(const ArrayType *AT) {
555   switch (AT->getSizeModifier()) {
556   case ArrayType::Star:
557     JOS.attribute("sizeModifier", "*");
558     break;
559   case ArrayType::Static:
560     JOS.attribute("sizeModifier", "static");
561     break;
562   case ArrayType::Normal:
563     break;
564   }
565 
566   std::string Str = AT->getIndexTypeQualifiers().getAsString();
567   if (!Str.empty())
568     JOS.attribute("indexTypeQualifiers", Str);
569 }
570 
571 void JSONNodeDumper::VisitConstantArrayType(const ConstantArrayType *CAT) {
572   // FIXME: this should use ZExt instead of SExt, but JSON doesn't allow a
573   // narrowing conversion to int64_t so it cannot be expressed.
574   JOS.attribute("size", CAT->getSize().getSExtValue());
575   VisitArrayType(CAT);
576 }
577 
578 void JSONNodeDumper::VisitDependentSizedExtVectorType(
579     const DependentSizedExtVectorType *VT) {
580   JOS.attributeObject(
581       "attrLoc", [VT, this] { writeSourceLocation(VT->getAttributeLoc()); });
582 }
583 
584 void JSONNodeDumper::VisitVectorType(const VectorType *VT) {
585   JOS.attribute("numElements", VT->getNumElements());
586   switch (VT->getVectorKind()) {
587   case VectorType::GenericVector:
588     break;
589   case VectorType::AltiVecVector:
590     JOS.attribute("vectorKind", "altivec");
591     break;
592   case VectorType::AltiVecPixel:
593     JOS.attribute("vectorKind", "altivec pixel");
594     break;
595   case VectorType::AltiVecBool:
596     JOS.attribute("vectorKind", "altivec bool");
597     break;
598   case VectorType::NeonVector:
599     JOS.attribute("vectorKind", "neon");
600     break;
601   case VectorType::NeonPolyVector:
602     JOS.attribute("vectorKind", "neon poly");
603     break;
604   }
605 }
606 
607 void JSONNodeDumper::VisitUnresolvedUsingType(const UnresolvedUsingType *UUT) {
608   JOS.attribute("decl", createBareDeclRef(UUT->getDecl()));
609 }
610 
611 void JSONNodeDumper::VisitUnaryTransformType(const UnaryTransformType *UTT) {
612   switch (UTT->getUTTKind()) {
613   case UnaryTransformType::EnumUnderlyingType:
614     JOS.attribute("transformKind", "underlying_type");
615     break;
616   }
617 }
618 
619 void JSONNodeDumper::VisitTagType(const TagType *TT) {
620   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
621 }
622 
623 void JSONNodeDumper::VisitTemplateTypeParmType(
624     const TemplateTypeParmType *TTPT) {
625   JOS.attribute("depth", TTPT->getDepth());
626   JOS.attribute("index", TTPT->getIndex());
627   attributeOnlyIfTrue("isPack", TTPT->isParameterPack());
628   JOS.attribute("decl", createBareDeclRef(TTPT->getDecl()));
629 }
630 
631 void JSONNodeDumper::VisitAutoType(const AutoType *AT) {
632   JOS.attribute("undeduced", !AT->isDeduced());
633   switch (AT->getKeyword()) {
634   case AutoTypeKeyword::Auto:
635     JOS.attribute("typeKeyword", "auto");
636     break;
637   case AutoTypeKeyword::DecltypeAuto:
638     JOS.attribute("typeKeyword", "decltype(auto)");
639     break;
640   case AutoTypeKeyword::GNUAutoType:
641     JOS.attribute("typeKeyword", "__auto_type");
642     break;
643   }
644 }
645 
646 void JSONNodeDumper::VisitTemplateSpecializationType(
647     const TemplateSpecializationType *TST) {
648   attributeOnlyIfTrue("isAlias", TST->isTypeAlias());
649 
650   std::string Str;
651   llvm::raw_string_ostream OS(Str);
652   TST->getTemplateName().print(OS, PrintPolicy);
653   JOS.attribute("templateName", OS.str());
654 }
655 
656 void JSONNodeDumper::VisitInjectedClassNameType(
657     const InjectedClassNameType *ICNT) {
658   JOS.attribute("decl", createBareDeclRef(ICNT->getDecl()));
659 }
660 
661 void JSONNodeDumper::VisitObjCInterfaceType(const ObjCInterfaceType *OIT) {
662   JOS.attribute("decl", createBareDeclRef(OIT->getDecl()));
663 }
664 
665 void JSONNodeDumper::VisitPackExpansionType(const PackExpansionType *PET) {
666   if (llvm::Optional<unsigned> N = PET->getNumExpansions())
667     JOS.attribute("numExpansions", *N);
668 }
669 
670 void JSONNodeDumper::VisitElaboratedType(const ElaboratedType *ET) {
671   if (const NestedNameSpecifier *NNS = ET->getQualifier()) {
672     std::string Str;
673     llvm::raw_string_ostream OS(Str);
674     NNS->print(OS, PrintPolicy, /*ResolveTemplateArgs*/ true);
675     JOS.attribute("qualifier", OS.str());
676   }
677   if (const TagDecl *TD = ET->getOwnedTagDecl())
678     JOS.attribute("ownedTagDecl", createBareDeclRef(TD));
679 }
680 
681 void JSONNodeDumper::VisitMacroQualifiedType(const MacroQualifiedType *MQT) {
682   JOS.attribute("macroName", MQT->getMacroIdentifier()->getName());
683 }
684 
685 void JSONNodeDumper::VisitMemberPointerType(const MemberPointerType *MPT) {
686   attributeOnlyIfTrue("isData", MPT->isMemberDataPointer());
687   attributeOnlyIfTrue("isFunction", MPT->isMemberFunctionPointer());
688 }
689 
690 void JSONNodeDumper::VisitNamedDecl(const NamedDecl *ND) {
691   if (ND && ND->getDeclName()) {
692     JOS.attribute("name", ND->getNameAsString());
693     std::string MangledName = ASTNameGen.getName(ND);
694     if (!MangledName.empty())
695       JOS.attribute("mangledName", MangledName);
696   }
697 }
698 
699 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
700   VisitNamedDecl(TD);
701   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
702 }
703 
704 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
705   VisitNamedDecl(TAD);
706   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
707 }
708 
709 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
710   VisitNamedDecl(ND);
711   attributeOnlyIfTrue("isInline", ND->isInline());
712   if (!ND->isOriginalNamespace())
713     JOS.attribute("originalNamespace",
714                   createBareDeclRef(ND->getOriginalNamespace()));
715 }
716 
717 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
718   JOS.attribute("nominatedNamespace",
719                 createBareDeclRef(UDD->getNominatedNamespace()));
720 }
721 
722 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
723   VisitNamedDecl(NAD);
724   JOS.attribute("aliasedNamespace",
725                 createBareDeclRef(NAD->getAliasedNamespace()));
726 }
727 
728 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
729   std::string Name;
730   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
731     llvm::raw_string_ostream SOS(Name);
732     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
733   }
734   Name += UD->getNameAsString();
735   JOS.attribute("name", Name);
736 }
737 
738 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
739   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
740 }
741 
742 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
743   VisitNamedDecl(VD);
744   JOS.attribute("type", createQualType(VD->getType()));
745 
746   StorageClass SC = VD->getStorageClass();
747   if (SC != SC_None)
748     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
749   switch (VD->getTLSKind()) {
750   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
751   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
752   case VarDecl::TLS_None: break;
753   }
754   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
755   attributeOnlyIfTrue("inline", VD->isInline());
756   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
757   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
758   if (VD->hasInit()) {
759     switch (VD->getInitStyle()) {
760     case VarDecl::CInit: JOS.attribute("init", "c");  break;
761     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
762     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
763     }
764   }
765   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
766 }
767 
768 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
769   VisitNamedDecl(FD);
770   JOS.attribute("type", createQualType(FD->getType()));
771   attributeOnlyIfTrue("mutable", FD->isMutable());
772   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
773   attributeOnlyIfTrue("isBitfield", FD->isBitField());
774   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
775 }
776 
777 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
778   VisitNamedDecl(FD);
779   JOS.attribute("type", createQualType(FD->getType()));
780   StorageClass SC = FD->getStorageClass();
781   if (SC != SC_None)
782     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
783   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
784   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
785   attributeOnlyIfTrue("pure", FD->isPure());
786   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
787   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
788   attributeOnlyIfTrue("variadic", FD->isVariadic());
789 
790   if (FD->isDefaulted())
791     JOS.attribute("explicitlyDefaulted",
792                   FD->isDeleted() ? "deleted" : "default");
793 }
794 
795 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
796   VisitNamedDecl(ED);
797   if (ED->isFixed())
798     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
799   if (ED->isScoped())
800     JOS.attribute("scopedEnumTag",
801                   ED->isScopedUsingClassTag() ? "class" : "struct");
802 }
803 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
804   VisitNamedDecl(ECD);
805   JOS.attribute("type", createQualType(ECD->getType()));
806 }
807 
808 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
809   VisitNamedDecl(RD);
810   JOS.attribute("tagUsed", RD->getKindName());
811   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
812 }
813 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
814   VisitRecordDecl(RD);
815 
816   // All other information requires a complete definition.
817   if (!RD->isCompleteDefinition())
818     return;
819 
820   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
821   if (RD->getNumBases()) {
822     JOS.attributeArray("bases", [this, RD] {
823       for (const auto &Spec : RD->bases())
824         JOS.value(createCXXBaseSpecifier(Spec));
825     });
826   }
827 }
828 
829 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
830   VisitNamedDecl(D);
831   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
832   JOS.attribute("depth", D->getDepth());
833   JOS.attribute("index", D->getIndex());
834   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
835 
836   if (D->hasDefaultArgument())
837     JOS.attributeObject("defaultArg", [=] {
838       Visit(D->getDefaultArgument(), SourceRange(),
839             D->getDefaultArgStorage().getInheritedFrom(),
840             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
841     });
842 }
843 
844 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
845     const NonTypeTemplateParmDecl *D) {
846   VisitNamedDecl(D);
847   JOS.attribute("type", createQualType(D->getType()));
848   JOS.attribute("depth", D->getDepth());
849   JOS.attribute("index", D->getIndex());
850   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
851 
852   if (D->hasDefaultArgument())
853     JOS.attributeObject("defaultArg", [=] {
854       Visit(D->getDefaultArgument(), SourceRange(),
855             D->getDefaultArgStorage().getInheritedFrom(),
856             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
857     });
858 }
859 
860 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
861     const TemplateTemplateParmDecl *D) {
862   VisitNamedDecl(D);
863   JOS.attribute("depth", D->getDepth());
864   JOS.attribute("index", D->getIndex());
865   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
866 
867   if (D->hasDefaultArgument())
868     JOS.attributeObject("defaultArg", [=] {
869       Visit(D->getDefaultArgument().getArgument(),
870             D->getDefaultArgStorage().getInheritedFrom()->getSourceRange(),
871             D->getDefaultArgStorage().getInheritedFrom(),
872             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
873     });
874 }
875 
876 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
877   StringRef Lang;
878   switch (LSD->getLanguage()) {
879   case LinkageSpecDecl::lang_c: Lang = "C"; break;
880   case LinkageSpecDecl::lang_cxx: Lang = "C++"; break;
881   case LinkageSpecDecl::lang_cxx_11:
882     Lang = "C++11";
883     break;
884   case LinkageSpecDecl::lang_cxx_14:
885     Lang = "C++14";
886     break;
887   }
888   JOS.attribute("language", Lang);
889   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
890 }
891 
892 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
893   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
894 }
895 
896 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
897   if (const TypeSourceInfo *T = FD->getFriendType())
898     JOS.attribute("type", createQualType(T->getType()));
899 }
900 
901 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
902   VisitNamedDecl(D);
903   JOS.attribute("type", createQualType(D->getType()));
904   attributeOnlyIfTrue("synthesized", D->getSynthesize());
905   switch (D->getAccessControl()) {
906   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
907   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
908   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
909   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
910   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
911   }
912 }
913 
914 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
915   VisitNamedDecl(D);
916   JOS.attribute("returnType", createQualType(D->getReturnType()));
917   JOS.attribute("instance", D->isInstanceMethod());
918   attributeOnlyIfTrue("variadic", D->isVariadic());
919 }
920 
921 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
922   VisitNamedDecl(D);
923   JOS.attribute("type", createQualType(D->getUnderlyingType()));
924   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
925   switch (D->getVariance()) {
926   case ObjCTypeParamVariance::Invariant:
927     break;
928   case ObjCTypeParamVariance::Covariant:
929     JOS.attribute("variance", "covariant");
930     break;
931   case ObjCTypeParamVariance::Contravariant:
932     JOS.attribute("variance", "contravariant");
933     break;
934   }
935 }
936 
937 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
938   VisitNamedDecl(D);
939   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
940   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
941 
942   llvm::json::Array Protocols;
943   for (const auto* P : D->protocols())
944     Protocols.push_back(createBareDeclRef(P));
945   if (!Protocols.empty())
946     JOS.attribute("protocols", std::move(Protocols));
947 }
948 
949 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
950   VisitNamedDecl(D);
951   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
952   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
953 }
954 
955 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
956   VisitNamedDecl(D);
957 
958   llvm::json::Array Protocols;
959   for (const auto *P : D->protocols())
960     Protocols.push_back(createBareDeclRef(P));
961   if (!Protocols.empty())
962     JOS.attribute("protocols", std::move(Protocols));
963 }
964 
965 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
966   VisitNamedDecl(D);
967   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
968   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
969 
970   llvm::json::Array Protocols;
971   for (const auto* P : D->protocols())
972     Protocols.push_back(createBareDeclRef(P));
973   if (!Protocols.empty())
974     JOS.attribute("protocols", std::move(Protocols));
975 }
976 
977 void JSONNodeDumper::VisitObjCImplementationDecl(
978     const ObjCImplementationDecl *D) {
979   VisitNamedDecl(D);
980   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
981   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
982 }
983 
984 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
985     const ObjCCompatibleAliasDecl *D) {
986   VisitNamedDecl(D);
987   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
988 }
989 
990 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
991   VisitNamedDecl(D);
992   JOS.attribute("type", createQualType(D->getType()));
993 
994   switch (D->getPropertyImplementation()) {
995   case ObjCPropertyDecl::None: break;
996   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
997   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
998   }
999 
1000   ObjCPropertyDecl::PropertyAttributeKind Attrs = D->getPropertyAttributes();
1001   if (Attrs != ObjCPropertyDecl::OBJC_PR_noattr) {
1002     if (Attrs & ObjCPropertyDecl::OBJC_PR_getter)
1003       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
1004     if (Attrs & ObjCPropertyDecl::OBJC_PR_setter)
1005       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
1006     attributeOnlyIfTrue("readonly", Attrs & ObjCPropertyDecl::OBJC_PR_readonly);
1007     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyDecl::OBJC_PR_assign);
1008     attributeOnlyIfTrue("readwrite",
1009                         Attrs & ObjCPropertyDecl::OBJC_PR_readwrite);
1010     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyDecl::OBJC_PR_retain);
1011     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyDecl::OBJC_PR_copy);
1012     attributeOnlyIfTrue("nonatomic",
1013                         Attrs & ObjCPropertyDecl::OBJC_PR_nonatomic);
1014     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyDecl::OBJC_PR_atomic);
1015     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyDecl::OBJC_PR_weak);
1016     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyDecl::OBJC_PR_strong);
1017     attributeOnlyIfTrue("unsafe_unretained",
1018                         Attrs & ObjCPropertyDecl::OBJC_PR_unsafe_unretained);
1019     attributeOnlyIfTrue("class", Attrs & ObjCPropertyDecl::OBJC_PR_class);
1020     attributeOnlyIfTrue("direct", Attrs & ObjCPropertyDecl::OBJC_PR_direct);
1021     attributeOnlyIfTrue("nullability",
1022                         Attrs & ObjCPropertyDecl::OBJC_PR_nullability);
1023     attributeOnlyIfTrue("null_resettable",
1024                         Attrs & ObjCPropertyDecl::OBJC_PR_null_resettable);
1025   }
1026 }
1027 
1028 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
1029   VisitNamedDecl(D->getPropertyDecl());
1030   JOS.attribute("implKind", D->getPropertyImplementation() ==
1031                                     ObjCPropertyImplDecl::Synthesize
1032                                 ? "synthesize"
1033                                 : "dynamic");
1034   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
1035   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
1036 }
1037 
1038 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
1039   attributeOnlyIfTrue("variadic", D->isVariadic());
1040   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
1041 }
1042 
1043 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1044   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1045 }
1046 
1047 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1048   std::string Str;
1049   llvm::raw_string_ostream OS(Str);
1050 
1051   OME->getSelector().print(OS);
1052   JOS.attribute("selector", OS.str());
1053 
1054   switch (OME->getReceiverKind()) {
1055   case ObjCMessageExpr::Instance:
1056     JOS.attribute("receiverKind", "instance");
1057     break;
1058   case ObjCMessageExpr::Class:
1059     JOS.attribute("receiverKind", "class");
1060     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1061     break;
1062   case ObjCMessageExpr::SuperInstance:
1063     JOS.attribute("receiverKind", "super (instance)");
1064     JOS.attribute("superType", createQualType(OME->getSuperType()));
1065     break;
1066   case ObjCMessageExpr::SuperClass:
1067     JOS.attribute("receiverKind", "super (class)");
1068     JOS.attribute("superType", createQualType(OME->getSuperType()));
1069     break;
1070   }
1071 
1072   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1073   if (OME->getType() != CallReturnTy)
1074     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1075 }
1076 
1077 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1078   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1079     std::string Str;
1080     llvm::raw_string_ostream OS(Str);
1081 
1082     MD->getSelector().print(OS);
1083     JOS.attribute("selector", OS.str());
1084   }
1085 }
1086 
1087 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1088   std::string Str;
1089   llvm::raw_string_ostream OS(Str);
1090 
1091   OSE->getSelector().print(OS);
1092   JOS.attribute("selector", OS.str());
1093 }
1094 
1095 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1096   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1097 }
1098 
1099 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1100   if (OPRE->isImplicitProperty()) {
1101     JOS.attribute("propertyKind", "implicit");
1102     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1103       JOS.attribute("getter", createBareDeclRef(MD));
1104     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1105       JOS.attribute("setter", createBareDeclRef(MD));
1106   } else {
1107     JOS.attribute("propertyKind", "explicit");
1108     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1109   }
1110 
1111   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1112   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1113   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1114 }
1115 
1116 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1117     const ObjCSubscriptRefExpr *OSRE) {
1118   JOS.attribute("subscriptKind",
1119                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1120 
1121   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1122     JOS.attribute("getter", createBareDeclRef(MD));
1123   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1124     JOS.attribute("setter", createBareDeclRef(MD));
1125 }
1126 
1127 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1128   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1129   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1130   JOS.attribute("isArrow", OIRE->isArrow());
1131 }
1132 
1133 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1134   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1135 }
1136 
1137 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1138   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1139   if (DRE->getDecl() != DRE->getFoundDecl())
1140     JOS.attribute("foundReferencedDecl",
1141                   createBareDeclRef(DRE->getFoundDecl()));
1142   switch (DRE->isNonOdrUse()) {
1143   case NOUR_None: break;
1144   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1145   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1146   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1147   }
1148 }
1149 
1150 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1151   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1152 }
1153 
1154 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1155   JOS.attribute("isPostfix", UO->isPostfix());
1156   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1157   if (!UO->canOverflow())
1158     JOS.attribute("canOverflow", false);
1159 }
1160 
1161 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1162   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1163 }
1164 
1165 void JSONNodeDumper::VisitCompoundAssignOperator(
1166     const CompoundAssignOperator *CAO) {
1167   VisitBinaryOperator(CAO);
1168   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1169   JOS.attribute("computeResultType",
1170                 createQualType(CAO->getComputationResultType()));
1171 }
1172 
1173 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1174   // Note, we always write this Boolean field because the information it conveys
1175   // is critical to understanding the AST node.
1176   ValueDecl *VD = ME->getMemberDecl();
1177   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1178   JOS.attribute("isArrow", ME->isArrow());
1179   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1180   switch (ME->isNonOdrUse()) {
1181   case NOUR_None: break;
1182   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1183   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1184   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1185   }
1186 }
1187 
1188 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1189   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1190   attributeOnlyIfTrue("isArray", NE->isArray());
1191   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1192   switch (NE->getInitializationStyle()) {
1193   case CXXNewExpr::NoInit: break;
1194   case CXXNewExpr::CallInit: JOS.attribute("initStyle", "call"); break;
1195   case CXXNewExpr::ListInit: JOS.attribute("initStyle", "list"); break;
1196   }
1197   if (const FunctionDecl *FD = NE->getOperatorNew())
1198     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1199   if (const FunctionDecl *FD = NE->getOperatorDelete())
1200     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1201 }
1202 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1203   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1204   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1205   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1206   if (const FunctionDecl *FD = DE->getOperatorDelete())
1207     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1208 }
1209 
1210 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1211   attributeOnlyIfTrue("implicit", TE->isImplicit());
1212 }
1213 
1214 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1215   JOS.attribute("castKind", CE->getCastKindName());
1216   llvm::json::Array Path = createCastPath(CE);
1217   if (!Path.empty())
1218     JOS.attribute("path", std::move(Path));
1219   // FIXME: This may not be useful information as it can be obtusely gleaned
1220   // from the inner[] array.
1221   if (const NamedDecl *ND = CE->getConversionFunction())
1222     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1223 }
1224 
1225 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1226   VisitCastExpr(ICE);
1227   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1228 }
1229 
1230 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1231   attributeOnlyIfTrue("adl", CE->usesADL());
1232 }
1233 
1234 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1235     const UnaryExprOrTypeTraitExpr *TTE) {
1236   switch (TTE->getKind()) {
1237   case UETT_SizeOf: JOS.attribute("name", "sizeof"); break;
1238   case UETT_AlignOf: JOS.attribute("name", "alignof"); break;
1239   case UETT_VecStep:  JOS.attribute("name", "vec_step"); break;
1240   case UETT_PreferredAlignOf:  JOS.attribute("name", "__alignof"); break;
1241   case UETT_OpenMPRequiredSimdAlign:
1242     JOS.attribute("name", "__builtin_omp_required_simd_align"); break;
1243   }
1244   if (TTE->isArgumentType())
1245     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1246 }
1247 
1248 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1249   VisitNamedDecl(SOPE->getPack());
1250 }
1251 
1252 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1253     const UnresolvedLookupExpr *ULE) {
1254   JOS.attribute("usesADL", ULE->requiresADL());
1255   JOS.attribute("name", ULE->getName().getAsString());
1256 
1257   JOS.attributeArray("lookups", [this, ULE] {
1258     for (const NamedDecl *D : ULE->decls())
1259       JOS.value(createBareDeclRef(D));
1260   });
1261 }
1262 
1263 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1264   JOS.attribute("name", ALE->getLabel()->getName());
1265   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1266 }
1267 
1268 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1269   if (CTE->isTypeOperand()) {
1270     QualType Adjusted = CTE->getTypeOperand(Ctx);
1271     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1272     JOS.attribute("typeArg", createQualType(Unadjusted));
1273     if (Adjusted != Unadjusted)
1274       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1275   }
1276 }
1277 
1278 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1279   if (CE->getResultAPValueKind() != APValue::None) {
1280     std::string Str;
1281     llvm::raw_string_ostream OS(Str);
1282     CE->getAPValueResult().printPretty(OS, Ctx, CE->getType());
1283     JOS.attribute("value", OS.str());
1284   }
1285 }
1286 
1287 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1288   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1289     JOS.attribute("field", createBareDeclRef(FD));
1290 }
1291 
1292 void JSONNodeDumper::VisitGenericSelectionExpr(
1293     const GenericSelectionExpr *GSE) {
1294   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1295 }
1296 
1297 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1298     const CXXUnresolvedConstructExpr *UCE) {
1299   if (UCE->getType() != UCE->getTypeAsWritten())
1300     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1301   attributeOnlyIfTrue("list", UCE->isListInitialization());
1302 }
1303 
1304 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1305   CXXConstructorDecl *Ctor = CE->getConstructor();
1306   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1307   attributeOnlyIfTrue("elidable", CE->isElidable());
1308   attributeOnlyIfTrue("list", CE->isListInitialization());
1309   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1310   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1311   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1312 
1313   switch (CE->getConstructionKind()) {
1314   case CXXConstructExpr::CK_Complete:
1315     JOS.attribute("constructionKind", "complete");
1316     break;
1317   case CXXConstructExpr::CK_Delegating:
1318     JOS.attribute("constructionKind", "delegating");
1319     break;
1320   case CXXConstructExpr::CK_NonVirtualBase:
1321     JOS.attribute("constructionKind", "non-virtual base");
1322     break;
1323   case CXXConstructExpr::CK_VirtualBase:
1324     JOS.attribute("constructionKind", "virtual base");
1325     break;
1326   }
1327 }
1328 
1329 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1330   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1331                       EWC->cleanupsHaveSideEffects());
1332   if (EWC->getNumObjects()) {
1333     JOS.attributeArray("cleanups", [this, EWC] {
1334       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1335         JOS.value(createBareDeclRef(CO));
1336     });
1337   }
1338 }
1339 
1340 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1341     const CXXBindTemporaryExpr *BTE) {
1342   const CXXTemporary *Temp = BTE->getTemporary();
1343   JOS.attribute("temp", createPointerRepresentation(Temp));
1344   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1345     JOS.attribute("dtor", createBareDeclRef(Dtor));
1346 }
1347 
1348 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1349     const MaterializeTemporaryExpr *MTE) {
1350   if (const ValueDecl *VD = MTE->getExtendingDecl())
1351     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1352 
1353   switch (MTE->getStorageDuration()) {
1354   case SD_Automatic:
1355     JOS.attribute("storageDuration", "automatic");
1356     break;
1357   case SD_Dynamic:
1358     JOS.attribute("storageDuration", "dynamic");
1359     break;
1360   case SD_FullExpression:
1361     JOS.attribute("storageDuration", "full expression");
1362     break;
1363   case SD_Static:
1364     JOS.attribute("storageDuration", "static");
1365     break;
1366   case SD_Thread:
1367     JOS.attribute("storageDuration", "thread");
1368     break;
1369   }
1370 
1371   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1372 }
1373 
1374 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1375     const CXXDependentScopeMemberExpr *DSME) {
1376   JOS.attribute("isArrow", DSME->isArrow());
1377   JOS.attribute("member", DSME->getMember().getAsString());
1378   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1379   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1380                       DSME->hasExplicitTemplateArgs());
1381 
1382   if (DSME->getNumTemplateArgs()) {
1383     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1384       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1385         JOS.object(
1386             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1387     });
1388   }
1389 }
1390 
1391 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1392   JOS.attribute("value",
1393                 IL->getValue().toString(
1394                     /*Radix=*/10, IL->getType()->isSignedIntegerType()));
1395 }
1396 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1397   // FIXME: This should probably print the character literal as a string,
1398   // rather than as a numerical value. It would be nice if the behavior matched
1399   // what we do to print a string literal; right now, it is impossible to tell
1400   // the difference between 'a' and L'a' in C from the JSON output.
1401   JOS.attribute("value", CL->getValue());
1402 }
1403 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1404   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1405 }
1406 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1407   llvm::SmallVector<char, 16> Buffer;
1408   FL->getValue().toString(Buffer);
1409   JOS.attribute("value", Buffer);
1410 }
1411 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1412   std::string Buffer;
1413   llvm::raw_string_ostream SS(Buffer);
1414   SL->outputString(SS);
1415   JOS.attribute("value", SS.str());
1416 }
1417 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1418   JOS.attribute("value", BLE->getValue());
1419 }
1420 
1421 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1422   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1423   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1424   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1425   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1426 }
1427 
1428 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1429   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1430   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1431 }
1432 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1433   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1434 }
1435 
1436 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1437   JOS.attribute("name", LS->getName());
1438   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1439 }
1440 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1441   JOS.attribute("targetLabelDeclId",
1442                 createPointerRepresentation(GS->getLabel()));
1443 }
1444 
1445 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1446   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1447 }
1448 
1449 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1450   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1451   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1452   // null child node and ObjC gets no child node.
1453   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1454 }
1455 
1456 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1457   JOS.attribute("isNull", true);
1458 }
1459 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1460   JOS.attribute("type", createQualType(TA.getAsType()));
1461 }
1462 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1463     const TemplateArgument &TA) {
1464   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1465 }
1466 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1467   JOS.attribute("isNullptr", true);
1468 }
1469 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1470   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1471 }
1472 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1473   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1474   // the output format.
1475 }
1476 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1477     const TemplateArgument &TA) {
1478   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1479   // the output format.
1480 }
1481 void JSONNodeDumper::VisitExpressionTemplateArgument(
1482     const TemplateArgument &TA) {
1483   JOS.attribute("isExpr", true);
1484 }
1485 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1486   JOS.attribute("isPack", true);
1487 }
1488 
1489 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1490   if (Traits)
1491     return Traits->getCommandInfo(CommandID)->Name;
1492   if (const comments::CommandInfo *Info =
1493           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1494     return Info->Name;
1495   return "<invalid>";
1496 }
1497 
1498 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1499                                       const comments::FullComment *) {
1500   JOS.attribute("text", C->getText());
1501 }
1502 
1503 void JSONNodeDumper::visitInlineCommandComment(
1504     const comments::InlineCommandComment *C, const comments::FullComment *) {
1505   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1506 
1507   switch (C->getRenderKind()) {
1508   case comments::InlineCommandComment::RenderNormal:
1509     JOS.attribute("renderKind", "normal");
1510     break;
1511   case comments::InlineCommandComment::RenderBold:
1512     JOS.attribute("renderKind", "bold");
1513     break;
1514   case comments::InlineCommandComment::RenderEmphasized:
1515     JOS.attribute("renderKind", "emphasized");
1516     break;
1517   case comments::InlineCommandComment::RenderMonospaced:
1518     JOS.attribute("renderKind", "monospaced");
1519     break;
1520   }
1521 
1522   llvm::json::Array Args;
1523   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1524     Args.push_back(C->getArgText(I));
1525 
1526   if (!Args.empty())
1527     JOS.attribute("args", std::move(Args));
1528 }
1529 
1530 void JSONNodeDumper::visitHTMLStartTagComment(
1531     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1532   JOS.attribute("name", C->getTagName());
1533   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1534   attributeOnlyIfTrue("malformed", C->isMalformed());
1535 
1536   llvm::json::Array Attrs;
1537   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1538     Attrs.push_back(
1539         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1540 
1541   if (!Attrs.empty())
1542     JOS.attribute("attrs", std::move(Attrs));
1543 }
1544 
1545 void JSONNodeDumper::visitHTMLEndTagComment(
1546     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1547   JOS.attribute("name", C->getTagName());
1548 }
1549 
1550 void JSONNodeDumper::visitBlockCommandComment(
1551     const comments::BlockCommandComment *C, const comments::FullComment *) {
1552   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1553 
1554   llvm::json::Array Args;
1555   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1556     Args.push_back(C->getArgText(I));
1557 
1558   if (!Args.empty())
1559     JOS.attribute("args", std::move(Args));
1560 }
1561 
1562 void JSONNodeDumper::visitParamCommandComment(
1563     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1564   switch (C->getDirection()) {
1565   case comments::ParamCommandComment::In:
1566     JOS.attribute("direction", "in");
1567     break;
1568   case comments::ParamCommandComment::Out:
1569     JOS.attribute("direction", "out");
1570     break;
1571   case comments::ParamCommandComment::InOut:
1572     JOS.attribute("direction", "in,out");
1573     break;
1574   }
1575   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1576 
1577   if (C->hasParamName())
1578     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1579                                                   : C->getParamNameAsWritten());
1580 
1581   if (C->isParamIndexValid() && !C->isVarArgParam())
1582     JOS.attribute("paramIdx", C->getParamIndex());
1583 }
1584 
1585 void JSONNodeDumper::visitTParamCommandComment(
1586     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1587   if (C->hasParamName())
1588     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1589                                                 : C->getParamNameAsWritten());
1590   if (C->isPositionValid()) {
1591     llvm::json::Array Positions;
1592     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1593       Positions.push_back(C->getIndex(I));
1594 
1595     if (!Positions.empty())
1596       JOS.attribute("positions", std::move(Positions));
1597   }
1598 }
1599 
1600 void JSONNodeDumper::visitVerbatimBlockComment(
1601     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1602   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1603   JOS.attribute("closeName", C->getCloseName());
1604 }
1605 
1606 void JSONNodeDumper::visitVerbatimBlockLineComment(
1607     const comments::VerbatimBlockLineComment *C,
1608     const comments::FullComment *) {
1609   JOS.attribute("text", C->getText());
1610 }
1611 
1612 void JSONNodeDumper::visitVerbatimLineComment(
1613     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1614   JOS.attribute("text", C->getText());
1615 }
1616