xref: /freebsd/contrib/llvm-project/clang/lib/AST/JSONNodeDumper.cpp (revision cb14a3fe5122c879eae1fb480ed7ce82a699ddb6) 
1 #include "clang/AST/JSONNodeDumper.h"
2 #include "clang/AST/Type.h"
3 #include "clang/Basic/SourceManager.h"
4 #include "clang/Basic/Specifiers.h"
5 #include "clang/Lex/Lexer.h"
6 #include "llvm/ADT/StringExtras.h"
7 #include <optional>
8 
9 using namespace clang;
10 
11 void JSONNodeDumper::addPreviousDeclaration(const Decl *D) {
12   switch (D->getKind()) {
13 #define DECL(DERIVED, BASE)                                                    \
14   case Decl::DERIVED:                                                          \
15     return writePreviousDeclImpl(cast<DERIVED##Decl>(D));
16 #define ABSTRACT_DECL(DECL)
17 #include "clang/AST/DeclNodes.inc"
18 #undef ABSTRACT_DECL
19 #undef DECL
20   }
21   llvm_unreachable("Decl that isn't part of DeclNodes.inc!");
22 }
23 
24 void JSONNodeDumper::Visit(const Attr *A) {
25   const char *AttrName = nullptr;
26   switch (A->getKind()) {
27 #define ATTR(X)                                                                \
28   case attr::X:                                                                \
29     AttrName = #X"Attr";                                                       \
30     break;
31 #include "clang/Basic/AttrList.inc"
32 #undef ATTR
33   }
34   JOS.attribute("id", createPointerRepresentation(A));
35   JOS.attribute("kind", AttrName);
36   JOS.attributeObject("range", [A, this] { writeSourceRange(A->getRange()); });
37   attributeOnlyIfTrue("inherited", A->isInherited());
38   attributeOnlyIfTrue("implicit", A->isImplicit());
39 
40   // FIXME: it would be useful for us to output the spelling kind as well as
41   // the actual spelling. This would allow us to distinguish between the
42   // various attribute syntaxes, but we don't currently track that information
43   // within the AST.
44   //JOS.attribute("spelling", A->getSpelling());
45 
46   InnerAttrVisitor::Visit(A);
47 }
48 
49 void JSONNodeDumper::Visit(const Stmt *S) {
50   if (!S)
51     return;
52 
53   JOS.attribute("id", createPointerRepresentation(S));
54   JOS.attribute("kind", S->getStmtClassName());
55   JOS.attributeObject("range",
56                       [S, this] { writeSourceRange(S->getSourceRange()); });
57 
58   if (const auto *E = dyn_cast<Expr>(S)) {
59     JOS.attribute("type", createQualType(E->getType()));
60     const char *Category = nullptr;
61     switch (E->getValueKind()) {
62     case VK_LValue: Category = "lvalue"; break;
63     case VK_XValue: Category = "xvalue"; break;
64     case VK_PRValue:
65       Category = "prvalue";
66       break;
67     }
68     JOS.attribute("valueCategory", Category);
69   }
70   InnerStmtVisitor::Visit(S);
71 }
72 
73 void JSONNodeDumper::Visit(const Type *T) {
74   JOS.attribute("id", createPointerRepresentation(T));
75 
76   if (!T)
77     return;
78 
79   JOS.attribute("kind", (llvm::Twine(T->getTypeClassName()) + "Type").str());
80   JOS.attribute("type", createQualType(QualType(T, 0), /*Desugar*/ false));
81   attributeOnlyIfTrue("containsErrors", T->containsErrors());
82   attributeOnlyIfTrue("isDependent", T->isDependentType());
83   attributeOnlyIfTrue("isInstantiationDependent",
84                       T->isInstantiationDependentType());
85   attributeOnlyIfTrue("isVariablyModified", T->isVariablyModifiedType());
86   attributeOnlyIfTrue("containsUnexpandedPack",
87                       T->containsUnexpandedParameterPack());
88   attributeOnlyIfTrue("isImported", T->isFromAST());
89   InnerTypeVisitor::Visit(T);
90 }
91 
92 void JSONNodeDumper::Visit(QualType T) {
93   JOS.attribute("id", createPointerRepresentation(T.getAsOpaquePtr()));
94   JOS.attribute("kind", "QualType");
95   JOS.attribute("type", createQualType(T));
96   JOS.attribute("qualifiers", T.split().Quals.getAsString());
97 }
98 
99 void JSONNodeDumper::Visit(const Decl *D) {
100   JOS.attribute("id", createPointerRepresentation(D));
101 
102   if (!D)
103     return;
104 
105   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
106   JOS.attributeObject("loc",
107                       [D, this] { writeSourceLocation(D->getLocation()); });
108   JOS.attributeObject("range",
109                       [D, this] { writeSourceRange(D->getSourceRange()); });
110   attributeOnlyIfTrue("isImplicit", D->isImplicit());
111   attributeOnlyIfTrue("isInvalid", D->isInvalidDecl());
112 
113   if (D->isUsed())
114     JOS.attribute("isUsed", true);
115   else if (D->isThisDeclarationReferenced())
116     JOS.attribute("isReferenced", true);
117 
118   if (const auto *ND = dyn_cast<NamedDecl>(D))
119     attributeOnlyIfTrue("isHidden", !ND->isUnconditionallyVisible());
120 
121   if (D->getLexicalDeclContext() != D->getDeclContext()) {
122     // Because of multiple inheritance, a DeclContext pointer does not produce
123     // the same pointer representation as a Decl pointer that references the
124     // same AST Node.
125     const auto *ParentDeclContextDecl = dyn_cast<Decl>(D->getDeclContext());
126     JOS.attribute("parentDeclContextId",
127                   createPointerRepresentation(ParentDeclContextDecl));
128   }
129 
130   addPreviousDeclaration(D);
131   InnerDeclVisitor::Visit(D);
132 }
133 
134 void JSONNodeDumper::Visit(const comments::Comment *C,
135                            const comments::FullComment *FC) {
136   if (!C)
137     return;
138 
139   JOS.attribute("id", createPointerRepresentation(C));
140   JOS.attribute("kind", C->getCommentKindName());
141   JOS.attributeObject("loc",
142                       [C, this] { writeSourceLocation(C->getLocation()); });
143   JOS.attributeObject("range",
144                       [C, this] { writeSourceRange(C->getSourceRange()); });
145 
146   InnerCommentVisitor::visit(C, FC);
147 }
148 
149 void JSONNodeDumper::Visit(const TemplateArgument &TA, SourceRange R,
150                            const Decl *From, StringRef Label) {
151   JOS.attribute("kind", "TemplateArgument");
152   if (R.isValid())
153     JOS.attributeObject("range", [R, this] { writeSourceRange(R); });
154 
155   if (From)
156     JOS.attribute(Label.empty() ? "fromDecl" : Label, createBareDeclRef(From));
157 
158   InnerTemplateArgVisitor::Visit(TA);
159 }
160 
161 void JSONNodeDumper::Visit(const CXXCtorInitializer *Init) {
162   JOS.attribute("kind", "CXXCtorInitializer");
163   if (Init->isAnyMemberInitializer())
164     JOS.attribute("anyInit", createBareDeclRef(Init->getAnyMember()));
165   else if (Init->isBaseInitializer())
166     JOS.attribute("baseInit",
167                   createQualType(QualType(Init->getBaseClass(), 0)));
168   else if (Init->isDelegatingInitializer())
169     JOS.attribute("delegatingInit",
170                   createQualType(Init->getTypeSourceInfo()->getType()));
171   else
172     llvm_unreachable("Unknown initializer type");
173 }
174 
175 void JSONNodeDumper::Visit(const OMPClause *C) {}
176 
177 void JSONNodeDumper::Visit(const BlockDecl::Capture &C) {
178   JOS.attribute("kind", "Capture");
179   attributeOnlyIfTrue("byref", C.isByRef());
180   attributeOnlyIfTrue("nested", C.isNested());
181   if (C.getVariable())
182     JOS.attribute("var", createBareDeclRef(C.getVariable()));
183 }
184 
185 void JSONNodeDumper::Visit(const GenericSelectionExpr::ConstAssociation &A) {
186   JOS.attribute("associationKind", A.getTypeSourceInfo() ? "case" : "default");
187   attributeOnlyIfTrue("selected", A.isSelected());
188 }
189 
190 void JSONNodeDumper::Visit(const concepts::Requirement *R) {
191   if (!R)
192     return;
193 
194   switch (R->getKind()) {
195   case concepts::Requirement::RK_Type:
196     JOS.attribute("kind", "TypeRequirement");
197     break;
198   case concepts::Requirement::RK_Simple:
199     JOS.attribute("kind", "SimpleRequirement");
200     break;
201   case concepts::Requirement::RK_Compound:
202     JOS.attribute("kind", "CompoundRequirement");
203     break;
204   case concepts::Requirement::RK_Nested:
205     JOS.attribute("kind", "NestedRequirement");
206     break;
207   }
208 
209   if (auto *ER = dyn_cast<concepts::ExprRequirement>(R))
210     attributeOnlyIfTrue("noexcept", ER->hasNoexceptRequirement());
211 
212   attributeOnlyIfTrue("isDependent", R->isDependent());
213   if (!R->isDependent())
214     JOS.attribute("satisfied", R->isSatisfied());
215   attributeOnlyIfTrue("containsUnexpandedPack",
216                       R->containsUnexpandedParameterPack());
217 }
218 
219 void JSONNodeDumper::Visit(const APValue &Value, QualType Ty) {
220   std::string Str;
221   llvm::raw_string_ostream OS(Str);
222   Value.printPretty(OS, Ctx, Ty);
223   JOS.attribute("value", OS.str());
224 }
225 
226 void JSONNodeDumper::writeIncludeStack(PresumedLoc Loc, bool JustFirst) {
227   if (Loc.isInvalid())
228     return;
229 
230   JOS.attributeBegin("includedFrom");
231   JOS.objectBegin();
232 
233   if (!JustFirst) {
234     // Walk the stack recursively, then print out the presumed location.
235     writeIncludeStack(SM.getPresumedLoc(Loc.getIncludeLoc()));
236   }
237 
238   JOS.attribute("file", Loc.getFilename());
239   JOS.objectEnd();
240   JOS.attributeEnd();
241 }
242 
243 void JSONNodeDumper::writeBareSourceLocation(SourceLocation Loc,
244                                              bool IsSpelling) {
245   PresumedLoc Presumed = SM.getPresumedLoc(Loc);
246   unsigned ActualLine = IsSpelling ? SM.getSpellingLineNumber(Loc)
247                                    : SM.getExpansionLineNumber(Loc);
248   StringRef ActualFile = SM.getBufferName(Loc);
249 
250   if (Presumed.isValid()) {
251     JOS.attribute("offset", SM.getDecomposedLoc(Loc).second);
252     if (LastLocFilename != ActualFile) {
253       JOS.attribute("file", ActualFile);
254       JOS.attribute("line", ActualLine);
255     } else if (LastLocLine != ActualLine)
256       JOS.attribute("line", ActualLine);
257 
258     StringRef PresumedFile = Presumed.getFilename();
259     if (PresumedFile != ActualFile && LastLocPresumedFilename != PresumedFile)
260       JOS.attribute("presumedFile", PresumedFile);
261 
262     unsigned PresumedLine = Presumed.getLine();
263     if (ActualLine != PresumedLine && LastLocPresumedLine != PresumedLine)
264       JOS.attribute("presumedLine", PresumedLine);
265 
266     JOS.attribute("col", Presumed.getColumn());
267     JOS.attribute("tokLen",
268                   Lexer::MeasureTokenLength(Loc, SM, Ctx.getLangOpts()));
269     LastLocFilename = ActualFile;
270     LastLocPresumedFilename = PresumedFile;
271     LastLocPresumedLine = PresumedLine;
272     LastLocLine = ActualLine;
273 
274     // Orthogonal to the file, line, and column de-duplication is whether the
275     // given location was a result of an include. If so, print where the
276     // include location came from.
277     writeIncludeStack(SM.getPresumedLoc(Presumed.getIncludeLoc()),
278                       /*JustFirst*/ true);
279   }
280 }
281 
282 void JSONNodeDumper::writeSourceLocation(SourceLocation Loc) {
283   SourceLocation Spelling = SM.getSpellingLoc(Loc);
284   SourceLocation Expansion = SM.getExpansionLoc(Loc);
285 
286   if (Expansion != Spelling) {
287     // If the expansion and the spelling are different, output subobjects
288     // describing both locations.
289     JOS.attributeObject("spellingLoc", [Spelling, this] {
290       writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
291     });
292     JOS.attributeObject("expansionLoc", [Expansion, Loc, this] {
293       writeBareSourceLocation(Expansion, /*IsSpelling*/ false);
294       // If there is a macro expansion, add extra information if the interesting
295       // bit is the macro arg expansion.
296       if (SM.isMacroArgExpansion(Loc))
297         JOS.attribute("isMacroArgExpansion", true);
298     });
299   } else
300     writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
301 }
302 
303 void JSONNodeDumper::writeSourceRange(SourceRange R) {
304   JOS.attributeObject("begin",
305                       [R, this] { writeSourceLocation(R.getBegin()); });
306   JOS.attributeObject("end", [R, this] { writeSourceLocation(R.getEnd()); });
307 }
308 
309 std::string JSONNodeDumper::createPointerRepresentation(const void *Ptr) {
310   // Because JSON stores integer values as signed 64-bit integers, trying to
311   // represent them as such makes for very ugly pointer values in the resulting
312   // output. Instead, we convert the value to hex and treat it as a string.
313   return "0x" + llvm::utohexstr(reinterpret_cast<uint64_t>(Ptr), true);
314 }
315 
316 llvm::json::Object JSONNodeDumper::createQualType(QualType QT, bool Desugar) {
317   SplitQualType SQT = QT.split();
318   std::string SQTS = QualType::getAsString(SQT, PrintPolicy);
319   llvm::json::Object Ret{{"qualType", SQTS}};
320 
321   if (Desugar && !QT.isNull()) {
322     SplitQualType DSQT = QT.getSplitDesugaredType();
323     if (DSQT != SQT) {
324       std::string DSQTS = QualType::getAsString(DSQT, PrintPolicy);
325       if (DSQTS != SQTS)
326         Ret["desugaredQualType"] = DSQTS;
327     }
328     if (const auto *TT = QT->getAs<TypedefType>())
329       Ret["typeAliasDeclId"] = createPointerRepresentation(TT->getDecl());
330   }
331   return Ret;
332 }
333 
334 void JSONNodeDumper::writeBareDeclRef(const Decl *D) {
335   JOS.attribute("id", createPointerRepresentation(D));
336   if (!D)
337     return;
338 
339   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
340   if (const auto *ND = dyn_cast<NamedDecl>(D))
341     JOS.attribute("name", ND->getDeclName().getAsString());
342   if (const auto *VD = dyn_cast<ValueDecl>(D))
343     JOS.attribute("type", createQualType(VD->getType()));
344 }
345 
346 llvm::json::Object JSONNodeDumper::createBareDeclRef(const Decl *D) {
347   llvm::json::Object Ret{{"id", createPointerRepresentation(D)}};
348   if (!D)
349     return Ret;
350 
351   Ret["kind"] = (llvm::Twine(D->getDeclKindName()) + "Decl").str();
352   if (const auto *ND = dyn_cast<NamedDecl>(D))
353     Ret["name"] = ND->getDeclName().getAsString();
354   if (const auto *VD = dyn_cast<ValueDecl>(D))
355     Ret["type"] = createQualType(VD->getType());
356   return Ret;
357 }
358 
359 llvm::json::Array JSONNodeDumper::createCastPath(const CastExpr *C) {
360   llvm::json::Array Ret;
361   if (C->path_empty())
362     return Ret;
363 
364   for (auto I = C->path_begin(), E = C->path_end(); I != E; ++I) {
365     const CXXBaseSpecifier *Base = *I;
366     const auto *RD =
367         cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
368 
369     llvm::json::Object Val{{"name", RD->getName()}};
370     if (Base->isVirtual())
371       Val["isVirtual"] = true;
372     Ret.push_back(std::move(Val));
373   }
374   return Ret;
375 }
376 
377 #define FIELD2(Name, Flag)  if (RD->Flag()) Ret[Name] = true
378 #define FIELD1(Flag)        FIELD2(#Flag, Flag)
379 
380 static llvm::json::Object
381 createDefaultConstructorDefinitionData(const CXXRecordDecl *RD) {
382   llvm::json::Object Ret;
383 
384   FIELD2("exists", hasDefaultConstructor);
385   FIELD2("trivial", hasTrivialDefaultConstructor);
386   FIELD2("nonTrivial", hasNonTrivialDefaultConstructor);
387   FIELD2("userProvided", hasUserProvidedDefaultConstructor);
388   FIELD2("isConstexpr", hasConstexprDefaultConstructor);
389   FIELD2("needsImplicit", needsImplicitDefaultConstructor);
390   FIELD2("defaultedIsConstexpr", defaultedDefaultConstructorIsConstexpr);
391 
392   return Ret;
393 }
394 
395 static llvm::json::Object
396 createCopyConstructorDefinitionData(const CXXRecordDecl *RD) {
397   llvm::json::Object Ret;
398 
399   FIELD2("simple", hasSimpleCopyConstructor);
400   FIELD2("trivial", hasTrivialCopyConstructor);
401   FIELD2("nonTrivial", hasNonTrivialCopyConstructor);
402   FIELD2("userDeclared", hasUserDeclaredCopyConstructor);
403   FIELD2("hasConstParam", hasCopyConstructorWithConstParam);
404   FIELD2("implicitHasConstParam", implicitCopyConstructorHasConstParam);
405   FIELD2("needsImplicit", needsImplicitCopyConstructor);
406   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyConstructor);
407   if (!RD->needsOverloadResolutionForCopyConstructor())
408     FIELD2("defaultedIsDeleted", defaultedCopyConstructorIsDeleted);
409 
410   return Ret;
411 }
412 
413 static llvm::json::Object
414 createMoveConstructorDefinitionData(const CXXRecordDecl *RD) {
415   llvm::json::Object Ret;
416 
417   FIELD2("exists", hasMoveConstructor);
418   FIELD2("simple", hasSimpleMoveConstructor);
419   FIELD2("trivial", hasTrivialMoveConstructor);
420   FIELD2("nonTrivial", hasNonTrivialMoveConstructor);
421   FIELD2("userDeclared", hasUserDeclaredMoveConstructor);
422   FIELD2("needsImplicit", needsImplicitMoveConstructor);
423   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveConstructor);
424   if (!RD->needsOverloadResolutionForMoveConstructor())
425     FIELD2("defaultedIsDeleted", defaultedMoveConstructorIsDeleted);
426 
427   return Ret;
428 }
429 
430 static llvm::json::Object
431 createCopyAssignmentDefinitionData(const CXXRecordDecl *RD) {
432   llvm::json::Object Ret;
433 
434   FIELD2("simple", hasSimpleCopyAssignment);
435   FIELD2("trivial", hasTrivialCopyAssignment);
436   FIELD2("nonTrivial", hasNonTrivialCopyAssignment);
437   FIELD2("hasConstParam", hasCopyAssignmentWithConstParam);
438   FIELD2("implicitHasConstParam", implicitCopyAssignmentHasConstParam);
439   FIELD2("userDeclared", hasUserDeclaredCopyAssignment);
440   FIELD2("needsImplicit", needsImplicitCopyAssignment);
441   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyAssignment);
442 
443   return Ret;
444 }
445 
446 static llvm::json::Object
447 createMoveAssignmentDefinitionData(const CXXRecordDecl *RD) {
448   llvm::json::Object Ret;
449 
450   FIELD2("exists", hasMoveAssignment);
451   FIELD2("simple", hasSimpleMoveAssignment);
452   FIELD2("trivial", hasTrivialMoveAssignment);
453   FIELD2("nonTrivial", hasNonTrivialMoveAssignment);
454   FIELD2("userDeclared", hasUserDeclaredMoveAssignment);
455   FIELD2("needsImplicit", needsImplicitMoveAssignment);
456   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveAssignment);
457 
458   return Ret;
459 }
460 
461 static llvm::json::Object
462 createDestructorDefinitionData(const CXXRecordDecl *RD) {
463   llvm::json::Object Ret;
464 
465   FIELD2("simple", hasSimpleDestructor);
466   FIELD2("irrelevant", hasIrrelevantDestructor);
467   FIELD2("trivial", hasTrivialDestructor);
468   FIELD2("nonTrivial", hasNonTrivialDestructor);
469   FIELD2("userDeclared", hasUserDeclaredDestructor);
470   FIELD2("needsImplicit", needsImplicitDestructor);
471   FIELD2("needsOverloadResolution", needsOverloadResolutionForDestructor);
472   if (!RD->needsOverloadResolutionForDestructor())
473     FIELD2("defaultedIsDeleted", defaultedDestructorIsDeleted);
474 
475   return Ret;
476 }
477 
478 llvm::json::Object
479 JSONNodeDumper::createCXXRecordDefinitionData(const CXXRecordDecl *RD) {
480   llvm::json::Object Ret;
481 
482   // This data is common to all C++ classes.
483   FIELD1(isGenericLambda);
484   FIELD1(isLambda);
485   FIELD1(isEmpty);
486   FIELD1(isAggregate);
487   FIELD1(isStandardLayout);
488   FIELD1(isTriviallyCopyable);
489   FIELD1(isPOD);
490   FIELD1(isTrivial);
491   FIELD1(isPolymorphic);
492   FIELD1(isAbstract);
493   FIELD1(isLiteral);
494   FIELD1(canPassInRegisters);
495   FIELD1(hasUserDeclaredConstructor);
496   FIELD1(hasConstexprNonCopyMoveConstructor);
497   FIELD1(hasMutableFields);
498   FIELD1(hasVariantMembers);
499   FIELD2("canConstDefaultInit", allowConstDefaultInit);
500 
501   Ret["defaultCtor"] = createDefaultConstructorDefinitionData(RD);
502   Ret["copyCtor"] = createCopyConstructorDefinitionData(RD);
503   Ret["moveCtor"] = createMoveConstructorDefinitionData(RD);
504   Ret["copyAssign"] = createCopyAssignmentDefinitionData(RD);
505   Ret["moveAssign"] = createMoveAssignmentDefinitionData(RD);
506   Ret["dtor"] = createDestructorDefinitionData(RD);
507 
508   return Ret;
509 }
510 
511 #undef FIELD1
512 #undef FIELD2
513 
514 std::string JSONNodeDumper::createAccessSpecifier(AccessSpecifier AS) {
515   const auto AccessSpelling = getAccessSpelling(AS);
516   if (AccessSpelling.empty())
517     return "none";
518   return AccessSpelling.str();
519 }
520 
521 llvm::json::Object
522 JSONNodeDumper::createCXXBaseSpecifier(const CXXBaseSpecifier &BS) {
523   llvm::json::Object Ret;
524 
525   Ret["type"] = createQualType(BS.getType());
526   Ret["access"] = createAccessSpecifier(BS.getAccessSpecifier());
527   Ret["writtenAccess"] =
528       createAccessSpecifier(BS.getAccessSpecifierAsWritten());
529   if (BS.isVirtual())
530     Ret["isVirtual"] = true;
531   if (BS.isPackExpansion())
532     Ret["isPackExpansion"] = true;
533 
534   return Ret;
535 }
536 
537 void JSONNodeDumper::VisitAliasAttr(const AliasAttr *AA) {
538   JOS.attribute("aliasee", AA->getAliasee());
539 }
540 
541 void JSONNodeDumper::VisitCleanupAttr(const CleanupAttr *CA) {
542   JOS.attribute("cleanup_function", createBareDeclRef(CA->getFunctionDecl()));
543 }
544 
545 void JSONNodeDumper::VisitDeprecatedAttr(const DeprecatedAttr *DA) {
546   if (!DA->getMessage().empty())
547     JOS.attribute("message", DA->getMessage());
548   if (!DA->getReplacement().empty())
549     JOS.attribute("replacement", DA->getReplacement());
550 }
551 
552 void JSONNodeDumper::VisitUnavailableAttr(const UnavailableAttr *UA) {
553   if (!UA->getMessage().empty())
554     JOS.attribute("message", UA->getMessage());
555 }
556 
557 void JSONNodeDumper::VisitSectionAttr(const SectionAttr *SA) {
558   JOS.attribute("section_name", SA->getName());
559 }
560 
561 void JSONNodeDumper::VisitVisibilityAttr(const VisibilityAttr *VA) {
562   JOS.attribute("visibility", VisibilityAttr::ConvertVisibilityTypeToStr(
563                                   VA->getVisibility()));
564 }
565 
566 void JSONNodeDumper::VisitTLSModelAttr(const TLSModelAttr *TA) {
567   JOS.attribute("tls_model", TA->getModel());
568 }
569 
570 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
571   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
572   if (!TT->typeMatchesDecl())
573     JOS.attribute("type", createQualType(TT->desugar()));
574 }
575 
576 void JSONNodeDumper::VisitUsingType(const UsingType *TT) {
577   JOS.attribute("decl", createBareDeclRef(TT->getFoundDecl()));
578   if (!TT->typeMatchesDecl())
579     JOS.attribute("type", createQualType(TT->desugar()));
580 }
581 
582 void JSONNodeDumper::VisitFunctionType(const FunctionType *T) {
583   FunctionType::ExtInfo E = T->getExtInfo();
584   attributeOnlyIfTrue("noreturn", E.getNoReturn());
585   attributeOnlyIfTrue("producesResult", E.getProducesResult());
586   if (E.getHasRegParm())
587     JOS.attribute("regParm", E.getRegParm());
588   JOS.attribute("cc", FunctionType::getNameForCallConv(E.getCC()));
589 }
590 
591 void JSONNodeDumper::VisitFunctionProtoType(const FunctionProtoType *T) {
592   FunctionProtoType::ExtProtoInfo E = T->getExtProtoInfo();
593   attributeOnlyIfTrue("trailingReturn", E.HasTrailingReturn);
594   attributeOnlyIfTrue("const", T->isConst());
595   attributeOnlyIfTrue("volatile", T->isVolatile());
596   attributeOnlyIfTrue("restrict", T->isRestrict());
597   attributeOnlyIfTrue("variadic", E.Variadic);
598   switch (E.RefQualifier) {
599   case RQ_LValue: JOS.attribute("refQualifier", "&"); break;
600   case RQ_RValue: JOS.attribute("refQualifier", "&&"); break;
601   case RQ_None: break;
602   }
603   switch (E.ExceptionSpec.Type) {
604   case EST_DynamicNone:
605   case EST_Dynamic: {
606     JOS.attribute("exceptionSpec", "throw");
607     llvm::json::Array Types;
608     for (QualType QT : E.ExceptionSpec.Exceptions)
609       Types.push_back(createQualType(QT));
610     JOS.attribute("exceptionTypes", std::move(Types));
611   } break;
612   case EST_MSAny:
613     JOS.attribute("exceptionSpec", "throw");
614     JOS.attribute("throwsAny", true);
615     break;
616   case EST_BasicNoexcept:
617     JOS.attribute("exceptionSpec", "noexcept");
618     break;
619   case EST_NoexceptTrue:
620   case EST_NoexceptFalse:
621     JOS.attribute("exceptionSpec", "noexcept");
622     JOS.attribute("conditionEvaluatesTo",
623                 E.ExceptionSpec.Type == EST_NoexceptTrue);
624     //JOS.attributeWithCall("exceptionSpecExpr",
625     //                    [this, E]() { Visit(E.ExceptionSpec.NoexceptExpr); });
626     break;
627   case EST_NoThrow:
628     JOS.attribute("exceptionSpec", "nothrow");
629     break;
630   // FIXME: I cannot find a way to trigger these cases while dumping the AST. I
631   // suspect you can only run into them when executing an AST dump from within
632   // the debugger, which is not a use case we worry about for the JSON dumping
633   // feature.
634   case EST_DependentNoexcept:
635   case EST_Unevaluated:
636   case EST_Uninstantiated:
637   case EST_Unparsed:
638   case EST_None: break;
639   }
640   VisitFunctionType(T);
641 }
642 
643 void JSONNodeDumper::VisitRValueReferenceType(const ReferenceType *RT) {
644   attributeOnlyIfTrue("spelledAsLValue", RT->isSpelledAsLValue());
645 }
646 
647 void JSONNodeDumper::VisitArrayType(const ArrayType *AT) {
648   switch (AT->getSizeModifier()) {
649   case ArraySizeModifier::Star:
650     JOS.attribute("sizeModifier", "*");
651     break;
652   case ArraySizeModifier::Static:
653     JOS.attribute("sizeModifier", "static");
654     break;
655   case ArraySizeModifier::Normal:
656     break;
657   }
658 
659   std::string Str = AT->getIndexTypeQualifiers().getAsString();
660   if (!Str.empty())
661     JOS.attribute("indexTypeQualifiers", Str);
662 }
663 
664 void JSONNodeDumper::VisitConstantArrayType(const ConstantArrayType *CAT) {
665   // FIXME: this should use ZExt instead of SExt, but JSON doesn't allow a
666   // narrowing conversion to int64_t so it cannot be expressed.
667   JOS.attribute("size", CAT->getSize().getSExtValue());
668   VisitArrayType(CAT);
669 }
670 
671 void JSONNodeDumper::VisitDependentSizedExtVectorType(
672     const DependentSizedExtVectorType *VT) {
673   JOS.attributeObject(
674       "attrLoc", [VT, this] { writeSourceLocation(VT->getAttributeLoc()); });
675 }
676 
677 void JSONNodeDumper::VisitVectorType(const VectorType *VT) {
678   JOS.attribute("numElements", VT->getNumElements());
679   switch (VT->getVectorKind()) {
680   case VectorKind::Generic:
681     break;
682   case VectorKind::AltiVecVector:
683     JOS.attribute("vectorKind", "altivec");
684     break;
685   case VectorKind::AltiVecPixel:
686     JOS.attribute("vectorKind", "altivec pixel");
687     break;
688   case VectorKind::AltiVecBool:
689     JOS.attribute("vectorKind", "altivec bool");
690     break;
691   case VectorKind::Neon:
692     JOS.attribute("vectorKind", "neon");
693     break;
694   case VectorKind::NeonPoly:
695     JOS.attribute("vectorKind", "neon poly");
696     break;
697   case VectorKind::SveFixedLengthData:
698     JOS.attribute("vectorKind", "fixed-length sve data vector");
699     break;
700   case VectorKind::SveFixedLengthPredicate:
701     JOS.attribute("vectorKind", "fixed-length sve predicate vector");
702     break;
703   case VectorKind::RVVFixedLengthData:
704     JOS.attribute("vectorKind", "fixed-length rvv data vector");
705     break;
706   }
707 }
708 
709 void JSONNodeDumper::VisitUnresolvedUsingType(const UnresolvedUsingType *UUT) {
710   JOS.attribute("decl", createBareDeclRef(UUT->getDecl()));
711 }
712 
713 void JSONNodeDumper::VisitUnaryTransformType(const UnaryTransformType *UTT) {
714   switch (UTT->getUTTKind()) {
715 #define TRANSFORM_TYPE_TRAIT_DEF(Enum, Trait)                                  \
716   case UnaryTransformType::Enum:                                               \
717     JOS.attribute("transformKind", #Trait);                                    \
718     break;
719 #include "clang/Basic/TransformTypeTraits.def"
720   }
721 }
722 
723 void JSONNodeDumper::VisitTagType(const TagType *TT) {
724   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
725 }
726 
727 void JSONNodeDumper::VisitTemplateTypeParmType(
728     const TemplateTypeParmType *TTPT) {
729   JOS.attribute("depth", TTPT->getDepth());
730   JOS.attribute("index", TTPT->getIndex());
731   attributeOnlyIfTrue("isPack", TTPT->isParameterPack());
732   JOS.attribute("decl", createBareDeclRef(TTPT->getDecl()));
733 }
734 
735 void JSONNodeDumper::VisitSubstTemplateTypeParmType(
736     const SubstTemplateTypeParmType *STTPT) {
737   JOS.attribute("index", STTPT->getIndex());
738   if (auto PackIndex = STTPT->getPackIndex())
739     JOS.attribute("pack_index", *PackIndex);
740 }
741 
742 void JSONNodeDumper::VisitSubstTemplateTypeParmPackType(
743     const SubstTemplateTypeParmPackType *T) {
744   JOS.attribute("index", T->getIndex());
745 }
746 
747 void JSONNodeDumper::VisitAutoType(const AutoType *AT) {
748   JOS.attribute("undeduced", !AT->isDeduced());
749   switch (AT->getKeyword()) {
750   case AutoTypeKeyword::Auto:
751     JOS.attribute("typeKeyword", "auto");
752     break;
753   case AutoTypeKeyword::DecltypeAuto:
754     JOS.attribute("typeKeyword", "decltype(auto)");
755     break;
756   case AutoTypeKeyword::GNUAutoType:
757     JOS.attribute("typeKeyword", "__auto_type");
758     break;
759   }
760 }
761 
762 void JSONNodeDumper::VisitTemplateSpecializationType(
763     const TemplateSpecializationType *TST) {
764   attributeOnlyIfTrue("isAlias", TST->isTypeAlias());
765 
766   std::string Str;
767   llvm::raw_string_ostream OS(Str);
768   TST->getTemplateName().print(OS, PrintPolicy);
769   JOS.attribute("templateName", OS.str());
770 }
771 
772 void JSONNodeDumper::VisitInjectedClassNameType(
773     const InjectedClassNameType *ICNT) {
774   JOS.attribute("decl", createBareDeclRef(ICNT->getDecl()));
775 }
776 
777 void JSONNodeDumper::VisitObjCInterfaceType(const ObjCInterfaceType *OIT) {
778   JOS.attribute("decl", createBareDeclRef(OIT->getDecl()));
779 }
780 
781 void JSONNodeDumper::VisitPackExpansionType(const PackExpansionType *PET) {
782   if (std::optional<unsigned> N = PET->getNumExpansions())
783     JOS.attribute("numExpansions", *N);
784 }
785 
786 void JSONNodeDumper::VisitElaboratedType(const ElaboratedType *ET) {
787   if (const NestedNameSpecifier *NNS = ET->getQualifier()) {
788     std::string Str;
789     llvm::raw_string_ostream OS(Str);
790     NNS->print(OS, PrintPolicy, /*ResolveTemplateArgs*/ true);
791     JOS.attribute("qualifier", OS.str());
792   }
793   if (const TagDecl *TD = ET->getOwnedTagDecl())
794     JOS.attribute("ownedTagDecl", createBareDeclRef(TD));
795 }
796 
797 void JSONNodeDumper::VisitMacroQualifiedType(const MacroQualifiedType *MQT) {
798   JOS.attribute("macroName", MQT->getMacroIdentifier()->getName());
799 }
800 
801 void JSONNodeDumper::VisitMemberPointerType(const MemberPointerType *MPT) {
802   attributeOnlyIfTrue("isData", MPT->isMemberDataPointer());
803   attributeOnlyIfTrue("isFunction", MPT->isMemberFunctionPointer());
804 }
805 
806 void JSONNodeDumper::VisitNamedDecl(const NamedDecl *ND) {
807   if (ND && ND->getDeclName()) {
808     JOS.attribute("name", ND->getNameAsString());
809     // FIXME: There are likely other contexts in which it makes no sense to ask
810     // for a mangled name.
811     if (isa<RequiresExprBodyDecl>(ND->getDeclContext()))
812       return;
813 
814     // If the declaration is dependent or is in a dependent context, then the
815     // mangling is unlikely to be meaningful (and in some cases may cause
816     // "don't know how to mangle this" assertion failures.
817     if (ND->isTemplated())
818       return;
819 
820     // Mangled names are not meaningful for locals, and may not be well-defined
821     // in the case of VLAs.
822     auto *VD = dyn_cast<VarDecl>(ND);
823     if (VD && VD->hasLocalStorage())
824       return;
825 
826     // Do not mangle template deduction guides.
827     if (isa<CXXDeductionGuideDecl>(ND))
828       return;
829 
830     std::string MangledName = ASTNameGen.getName(ND);
831     if (!MangledName.empty())
832       JOS.attribute("mangledName", MangledName);
833   }
834 }
835 
836 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
837   VisitNamedDecl(TD);
838   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
839 }
840 
841 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
842   VisitNamedDecl(TAD);
843   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
844 }
845 
846 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
847   VisitNamedDecl(ND);
848   attributeOnlyIfTrue("isInline", ND->isInline());
849   attributeOnlyIfTrue("isNested", ND->isNested());
850   if (!ND->isOriginalNamespace())
851     JOS.attribute("originalNamespace",
852                   createBareDeclRef(ND->getOriginalNamespace()));
853 }
854 
855 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
856   JOS.attribute("nominatedNamespace",
857                 createBareDeclRef(UDD->getNominatedNamespace()));
858 }
859 
860 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
861   VisitNamedDecl(NAD);
862   JOS.attribute("aliasedNamespace",
863                 createBareDeclRef(NAD->getAliasedNamespace()));
864 }
865 
866 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
867   std::string Name;
868   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
869     llvm::raw_string_ostream SOS(Name);
870     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
871   }
872   Name += UD->getNameAsString();
873   JOS.attribute("name", Name);
874 }
875 
876 void JSONNodeDumper::VisitUsingEnumDecl(const UsingEnumDecl *UED) {
877   JOS.attribute("target", createBareDeclRef(UED->getEnumDecl()));
878 }
879 
880 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
881   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
882 }
883 
884 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
885   VisitNamedDecl(VD);
886   JOS.attribute("type", createQualType(VD->getType()));
887   if (const auto *P = dyn_cast<ParmVarDecl>(VD))
888     attributeOnlyIfTrue("explicitObjectParameter",
889                         P->isExplicitObjectParameter());
890 
891   StorageClass SC = VD->getStorageClass();
892   if (SC != SC_None)
893     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
894   switch (VD->getTLSKind()) {
895   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
896   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
897   case VarDecl::TLS_None: break;
898   }
899   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
900   attributeOnlyIfTrue("inline", VD->isInline());
901   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
902   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
903   if (VD->hasInit()) {
904     switch (VD->getInitStyle()) {
905     case VarDecl::CInit: JOS.attribute("init", "c");  break;
906     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
907     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
908     case VarDecl::ParenListInit:
909       JOS.attribute("init", "paren-list");
910       break;
911     }
912   }
913   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
914 }
915 
916 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
917   VisitNamedDecl(FD);
918   JOS.attribute("type", createQualType(FD->getType()));
919   attributeOnlyIfTrue("mutable", FD->isMutable());
920   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
921   attributeOnlyIfTrue("isBitfield", FD->isBitField());
922   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
923 }
924 
925 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
926   VisitNamedDecl(FD);
927   JOS.attribute("type", createQualType(FD->getType()));
928   StorageClass SC = FD->getStorageClass();
929   if (SC != SC_None)
930     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
931   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
932   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
933   attributeOnlyIfTrue("pure", FD->isPure());
934   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
935   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
936   attributeOnlyIfTrue("variadic", FD->isVariadic());
937   attributeOnlyIfTrue("immediate", FD->isImmediateFunction());
938 
939   if (FD->isDefaulted())
940     JOS.attribute("explicitlyDefaulted",
941                   FD->isDeleted() ? "deleted" : "default");
942 }
943 
944 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
945   VisitNamedDecl(ED);
946   if (ED->isFixed())
947     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
948   if (ED->isScoped())
949     JOS.attribute("scopedEnumTag",
950                   ED->isScopedUsingClassTag() ? "class" : "struct");
951 }
952 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
953   VisitNamedDecl(ECD);
954   JOS.attribute("type", createQualType(ECD->getType()));
955 }
956 
957 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
958   VisitNamedDecl(RD);
959   JOS.attribute("tagUsed", RD->getKindName());
960   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
961 }
962 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
963   VisitRecordDecl(RD);
964 
965   // All other information requires a complete definition.
966   if (!RD->isCompleteDefinition())
967     return;
968 
969   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
970   if (RD->getNumBases()) {
971     JOS.attributeArray("bases", [this, RD] {
972       for (const auto &Spec : RD->bases())
973         JOS.value(createCXXBaseSpecifier(Spec));
974     });
975   }
976 }
977 
978 void JSONNodeDumper::VisitHLSLBufferDecl(const HLSLBufferDecl *D) {
979   VisitNamedDecl(D);
980   JOS.attribute("bufferKind", D->isCBuffer() ? "cbuffer" : "tbuffer");
981 }
982 
983 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
984   VisitNamedDecl(D);
985   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
986   JOS.attribute("depth", D->getDepth());
987   JOS.attribute("index", D->getIndex());
988   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
989 
990   if (D->hasDefaultArgument())
991     JOS.attributeObject("defaultArg", [=] {
992       Visit(D->getDefaultArgument(), SourceRange(),
993             D->getDefaultArgStorage().getInheritedFrom(),
994             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
995     });
996 }
997 
998 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
999     const NonTypeTemplateParmDecl *D) {
1000   VisitNamedDecl(D);
1001   JOS.attribute("type", createQualType(D->getType()));
1002   JOS.attribute("depth", D->getDepth());
1003   JOS.attribute("index", D->getIndex());
1004   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1005 
1006   if (D->hasDefaultArgument())
1007     JOS.attributeObject("defaultArg", [=] {
1008       Visit(D->getDefaultArgument(), SourceRange(),
1009             D->getDefaultArgStorage().getInheritedFrom(),
1010             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1011     });
1012 }
1013 
1014 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
1015     const TemplateTemplateParmDecl *D) {
1016   VisitNamedDecl(D);
1017   JOS.attribute("depth", D->getDepth());
1018   JOS.attribute("index", D->getIndex());
1019   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1020 
1021   if (D->hasDefaultArgument())
1022     JOS.attributeObject("defaultArg", [=] {
1023       const auto *InheritedFrom = D->getDefaultArgStorage().getInheritedFrom();
1024       Visit(D->getDefaultArgument().getArgument(),
1025             InheritedFrom ? InheritedFrom->getSourceRange() : SourceLocation{},
1026             InheritedFrom,
1027             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1028     });
1029 }
1030 
1031 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
1032   StringRef Lang;
1033   switch (LSD->getLanguage()) {
1034   case LinkageSpecLanguageIDs::C:
1035     Lang = "C";
1036     break;
1037   case LinkageSpecLanguageIDs::CXX:
1038     Lang = "C++";
1039     break;
1040   }
1041   JOS.attribute("language", Lang);
1042   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
1043 }
1044 
1045 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
1046   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
1047 }
1048 
1049 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
1050   if (const TypeSourceInfo *T = FD->getFriendType())
1051     JOS.attribute("type", createQualType(T->getType()));
1052 }
1053 
1054 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
1055   VisitNamedDecl(D);
1056   JOS.attribute("type", createQualType(D->getType()));
1057   attributeOnlyIfTrue("synthesized", D->getSynthesize());
1058   switch (D->getAccessControl()) {
1059   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
1060   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
1061   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
1062   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
1063   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
1064   }
1065 }
1066 
1067 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
1068   VisitNamedDecl(D);
1069   JOS.attribute("returnType", createQualType(D->getReturnType()));
1070   JOS.attribute("instance", D->isInstanceMethod());
1071   attributeOnlyIfTrue("variadic", D->isVariadic());
1072 }
1073 
1074 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
1075   VisitNamedDecl(D);
1076   JOS.attribute("type", createQualType(D->getUnderlyingType()));
1077   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
1078   switch (D->getVariance()) {
1079   case ObjCTypeParamVariance::Invariant:
1080     break;
1081   case ObjCTypeParamVariance::Covariant:
1082     JOS.attribute("variance", "covariant");
1083     break;
1084   case ObjCTypeParamVariance::Contravariant:
1085     JOS.attribute("variance", "contravariant");
1086     break;
1087   }
1088 }
1089 
1090 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
1091   VisitNamedDecl(D);
1092   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1093   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1094 
1095   llvm::json::Array Protocols;
1096   for (const auto* P : D->protocols())
1097     Protocols.push_back(createBareDeclRef(P));
1098   if (!Protocols.empty())
1099     JOS.attribute("protocols", std::move(Protocols));
1100 }
1101 
1102 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
1103   VisitNamedDecl(D);
1104   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1105   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
1106 }
1107 
1108 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
1109   VisitNamedDecl(D);
1110 
1111   llvm::json::Array Protocols;
1112   for (const auto *P : D->protocols())
1113     Protocols.push_back(createBareDeclRef(P));
1114   if (!Protocols.empty())
1115     JOS.attribute("protocols", std::move(Protocols));
1116 }
1117 
1118 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
1119   VisitNamedDecl(D);
1120   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1121   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1122 
1123   llvm::json::Array Protocols;
1124   for (const auto* P : D->protocols())
1125     Protocols.push_back(createBareDeclRef(P));
1126   if (!Protocols.empty())
1127     JOS.attribute("protocols", std::move(Protocols));
1128 }
1129 
1130 void JSONNodeDumper::VisitObjCImplementationDecl(
1131     const ObjCImplementationDecl *D) {
1132   VisitNamedDecl(D);
1133   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1134   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1135 }
1136 
1137 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
1138     const ObjCCompatibleAliasDecl *D) {
1139   VisitNamedDecl(D);
1140   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1141 }
1142 
1143 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
1144   VisitNamedDecl(D);
1145   JOS.attribute("type", createQualType(D->getType()));
1146 
1147   switch (D->getPropertyImplementation()) {
1148   case ObjCPropertyDecl::None: break;
1149   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
1150   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
1151   }
1152 
1153   ObjCPropertyAttribute::Kind Attrs = D->getPropertyAttributes();
1154   if (Attrs != ObjCPropertyAttribute::kind_noattr) {
1155     if (Attrs & ObjCPropertyAttribute::kind_getter)
1156       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
1157     if (Attrs & ObjCPropertyAttribute::kind_setter)
1158       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
1159     attributeOnlyIfTrue("readonly",
1160                         Attrs & ObjCPropertyAttribute::kind_readonly);
1161     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyAttribute::kind_assign);
1162     attributeOnlyIfTrue("readwrite",
1163                         Attrs & ObjCPropertyAttribute::kind_readwrite);
1164     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyAttribute::kind_retain);
1165     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyAttribute::kind_copy);
1166     attributeOnlyIfTrue("nonatomic",
1167                         Attrs & ObjCPropertyAttribute::kind_nonatomic);
1168     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyAttribute::kind_atomic);
1169     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyAttribute::kind_weak);
1170     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyAttribute::kind_strong);
1171     attributeOnlyIfTrue("unsafe_unretained",
1172                         Attrs & ObjCPropertyAttribute::kind_unsafe_unretained);
1173     attributeOnlyIfTrue("class", Attrs & ObjCPropertyAttribute::kind_class);
1174     attributeOnlyIfTrue("direct", Attrs & ObjCPropertyAttribute::kind_direct);
1175     attributeOnlyIfTrue("nullability",
1176                         Attrs & ObjCPropertyAttribute::kind_nullability);
1177     attributeOnlyIfTrue("null_resettable",
1178                         Attrs & ObjCPropertyAttribute::kind_null_resettable);
1179   }
1180 }
1181 
1182 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
1183   VisitNamedDecl(D->getPropertyDecl());
1184   JOS.attribute("implKind", D->getPropertyImplementation() ==
1185                                     ObjCPropertyImplDecl::Synthesize
1186                                 ? "synthesize"
1187                                 : "dynamic");
1188   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
1189   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
1190 }
1191 
1192 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
1193   attributeOnlyIfTrue("variadic", D->isVariadic());
1194   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
1195 }
1196 
1197 void JSONNodeDumper::VisitAtomicExpr(const AtomicExpr *AE) {
1198   JOS.attribute("name", AE->getOpAsString());
1199 }
1200 
1201 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1202   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1203 }
1204 
1205 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1206   std::string Str;
1207   llvm::raw_string_ostream OS(Str);
1208 
1209   OME->getSelector().print(OS);
1210   JOS.attribute("selector", OS.str());
1211 
1212   switch (OME->getReceiverKind()) {
1213   case ObjCMessageExpr::Instance:
1214     JOS.attribute("receiverKind", "instance");
1215     break;
1216   case ObjCMessageExpr::Class:
1217     JOS.attribute("receiverKind", "class");
1218     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1219     break;
1220   case ObjCMessageExpr::SuperInstance:
1221     JOS.attribute("receiverKind", "super (instance)");
1222     JOS.attribute("superType", createQualType(OME->getSuperType()));
1223     break;
1224   case ObjCMessageExpr::SuperClass:
1225     JOS.attribute("receiverKind", "super (class)");
1226     JOS.attribute("superType", createQualType(OME->getSuperType()));
1227     break;
1228   }
1229 
1230   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1231   if (OME->getType() != CallReturnTy)
1232     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1233 }
1234 
1235 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1236   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1237     std::string Str;
1238     llvm::raw_string_ostream OS(Str);
1239 
1240     MD->getSelector().print(OS);
1241     JOS.attribute("selector", OS.str());
1242   }
1243 }
1244 
1245 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1246   std::string Str;
1247   llvm::raw_string_ostream OS(Str);
1248 
1249   OSE->getSelector().print(OS);
1250   JOS.attribute("selector", OS.str());
1251 }
1252 
1253 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1254   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1255 }
1256 
1257 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1258   if (OPRE->isImplicitProperty()) {
1259     JOS.attribute("propertyKind", "implicit");
1260     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1261       JOS.attribute("getter", createBareDeclRef(MD));
1262     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1263       JOS.attribute("setter", createBareDeclRef(MD));
1264   } else {
1265     JOS.attribute("propertyKind", "explicit");
1266     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1267   }
1268 
1269   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1270   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1271   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1272 }
1273 
1274 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1275     const ObjCSubscriptRefExpr *OSRE) {
1276   JOS.attribute("subscriptKind",
1277                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1278 
1279   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1280     JOS.attribute("getter", createBareDeclRef(MD));
1281   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1282     JOS.attribute("setter", createBareDeclRef(MD));
1283 }
1284 
1285 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1286   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1287   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1288   JOS.attribute("isArrow", OIRE->isArrow());
1289 }
1290 
1291 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1292   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1293 }
1294 
1295 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1296   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1297   if (DRE->getDecl() != DRE->getFoundDecl())
1298     JOS.attribute("foundReferencedDecl",
1299                   createBareDeclRef(DRE->getFoundDecl()));
1300   switch (DRE->isNonOdrUse()) {
1301   case NOUR_None: break;
1302   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1303   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1304   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1305   }
1306   attributeOnlyIfTrue("isImmediateEscalating", DRE->isImmediateEscalating());
1307 }
1308 
1309 void JSONNodeDumper::VisitSYCLUniqueStableNameExpr(
1310     const SYCLUniqueStableNameExpr *E) {
1311   JOS.attribute("typeSourceInfo",
1312                 createQualType(E->getTypeSourceInfo()->getType()));
1313 }
1314 
1315 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1316   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1317 }
1318 
1319 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1320   JOS.attribute("isPostfix", UO->isPostfix());
1321   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1322   if (!UO->canOverflow())
1323     JOS.attribute("canOverflow", false);
1324 }
1325 
1326 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1327   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1328 }
1329 
1330 void JSONNodeDumper::VisitCompoundAssignOperator(
1331     const CompoundAssignOperator *CAO) {
1332   VisitBinaryOperator(CAO);
1333   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1334   JOS.attribute("computeResultType",
1335                 createQualType(CAO->getComputationResultType()));
1336 }
1337 
1338 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1339   // Note, we always write this Boolean field because the information it conveys
1340   // is critical to understanding the AST node.
1341   ValueDecl *VD = ME->getMemberDecl();
1342   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1343   JOS.attribute("isArrow", ME->isArrow());
1344   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1345   switch (ME->isNonOdrUse()) {
1346   case NOUR_None: break;
1347   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1348   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1349   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1350   }
1351 }
1352 
1353 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1354   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1355   attributeOnlyIfTrue("isArray", NE->isArray());
1356   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1357   switch (NE->getInitializationStyle()) {
1358   case CXXNewInitializationStyle::None:
1359   case CXXNewInitializationStyle::Implicit:
1360     break;
1361   case CXXNewInitializationStyle::Call:
1362     JOS.attribute("initStyle", "call");
1363     break;
1364   case CXXNewInitializationStyle::List:
1365     JOS.attribute("initStyle", "list");
1366     break;
1367   }
1368   if (const FunctionDecl *FD = NE->getOperatorNew())
1369     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1370   if (const FunctionDecl *FD = NE->getOperatorDelete())
1371     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1372 }
1373 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1374   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1375   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1376   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1377   if (const FunctionDecl *FD = DE->getOperatorDelete())
1378     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1379 }
1380 
1381 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1382   attributeOnlyIfTrue("implicit", TE->isImplicit());
1383 }
1384 
1385 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1386   JOS.attribute("castKind", CE->getCastKindName());
1387   llvm::json::Array Path = createCastPath(CE);
1388   if (!Path.empty())
1389     JOS.attribute("path", std::move(Path));
1390   // FIXME: This may not be useful information as it can be obtusely gleaned
1391   // from the inner[] array.
1392   if (const NamedDecl *ND = CE->getConversionFunction())
1393     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1394 }
1395 
1396 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1397   VisitCastExpr(ICE);
1398   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1399 }
1400 
1401 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1402   attributeOnlyIfTrue("adl", CE->usesADL());
1403 }
1404 
1405 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1406     const UnaryExprOrTypeTraitExpr *TTE) {
1407   JOS.attribute("name", getTraitSpelling(TTE->getKind()));
1408   if (TTE->isArgumentType())
1409     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1410 }
1411 
1412 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1413   VisitNamedDecl(SOPE->getPack());
1414 }
1415 
1416 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1417     const UnresolvedLookupExpr *ULE) {
1418   JOS.attribute("usesADL", ULE->requiresADL());
1419   JOS.attribute("name", ULE->getName().getAsString());
1420 
1421   JOS.attributeArray("lookups", [this, ULE] {
1422     for (const NamedDecl *D : ULE->decls())
1423       JOS.value(createBareDeclRef(D));
1424   });
1425 }
1426 
1427 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1428   JOS.attribute("name", ALE->getLabel()->getName());
1429   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1430 }
1431 
1432 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1433   if (CTE->isTypeOperand()) {
1434     QualType Adjusted = CTE->getTypeOperand(Ctx);
1435     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1436     JOS.attribute("typeArg", createQualType(Unadjusted));
1437     if (Adjusted != Unadjusted)
1438       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1439   }
1440 }
1441 
1442 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1443   if (CE->getResultAPValueKind() != APValue::None)
1444     Visit(CE->getAPValueResult(), CE->getType());
1445 }
1446 
1447 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1448   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1449     JOS.attribute("field", createBareDeclRef(FD));
1450 }
1451 
1452 void JSONNodeDumper::VisitGenericSelectionExpr(
1453     const GenericSelectionExpr *GSE) {
1454   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1455 }
1456 
1457 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1458     const CXXUnresolvedConstructExpr *UCE) {
1459   if (UCE->getType() != UCE->getTypeAsWritten())
1460     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1461   attributeOnlyIfTrue("list", UCE->isListInitialization());
1462 }
1463 
1464 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1465   CXXConstructorDecl *Ctor = CE->getConstructor();
1466   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1467   attributeOnlyIfTrue("elidable", CE->isElidable());
1468   attributeOnlyIfTrue("list", CE->isListInitialization());
1469   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1470   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1471   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1472   attributeOnlyIfTrue("isImmediateEscalating", CE->isImmediateEscalating());
1473 
1474   switch (CE->getConstructionKind()) {
1475   case CXXConstructionKind::Complete:
1476     JOS.attribute("constructionKind", "complete");
1477     break;
1478   case CXXConstructionKind::Delegating:
1479     JOS.attribute("constructionKind", "delegating");
1480     break;
1481   case CXXConstructionKind::NonVirtualBase:
1482     JOS.attribute("constructionKind", "non-virtual base");
1483     break;
1484   case CXXConstructionKind::VirtualBase:
1485     JOS.attribute("constructionKind", "virtual base");
1486     break;
1487   }
1488 }
1489 
1490 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1491   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1492                       EWC->cleanupsHaveSideEffects());
1493   if (EWC->getNumObjects()) {
1494     JOS.attributeArray("cleanups", [this, EWC] {
1495       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1496         if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
1497           JOS.value(createBareDeclRef(BD));
1498         } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
1499           llvm::json::Object Obj;
1500           Obj["id"] = createPointerRepresentation(CLE);
1501           Obj["kind"] = CLE->getStmtClassName();
1502           JOS.value(std::move(Obj));
1503         } else {
1504           llvm_unreachable("unexpected cleanup object type");
1505         }
1506     });
1507   }
1508 }
1509 
1510 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1511     const CXXBindTemporaryExpr *BTE) {
1512   const CXXTemporary *Temp = BTE->getTemporary();
1513   JOS.attribute("temp", createPointerRepresentation(Temp));
1514   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1515     JOS.attribute("dtor", createBareDeclRef(Dtor));
1516 }
1517 
1518 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1519     const MaterializeTemporaryExpr *MTE) {
1520   if (const ValueDecl *VD = MTE->getExtendingDecl())
1521     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1522 
1523   switch (MTE->getStorageDuration()) {
1524   case SD_Automatic:
1525     JOS.attribute("storageDuration", "automatic");
1526     break;
1527   case SD_Dynamic:
1528     JOS.attribute("storageDuration", "dynamic");
1529     break;
1530   case SD_FullExpression:
1531     JOS.attribute("storageDuration", "full expression");
1532     break;
1533   case SD_Static:
1534     JOS.attribute("storageDuration", "static");
1535     break;
1536   case SD_Thread:
1537     JOS.attribute("storageDuration", "thread");
1538     break;
1539   }
1540 
1541   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1542 }
1543 
1544 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1545     const CXXDependentScopeMemberExpr *DSME) {
1546   JOS.attribute("isArrow", DSME->isArrow());
1547   JOS.attribute("member", DSME->getMember().getAsString());
1548   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1549   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1550                       DSME->hasExplicitTemplateArgs());
1551 
1552   if (DSME->getNumTemplateArgs()) {
1553     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1554       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1555         JOS.object(
1556             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1557     });
1558   }
1559 }
1560 
1561 void JSONNodeDumper::VisitRequiresExpr(const RequiresExpr *RE) {
1562   if (!RE->isValueDependent())
1563     JOS.attribute("satisfied", RE->isSatisfied());
1564 }
1565 
1566 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1567   llvm::SmallString<16> Buffer;
1568   IL->getValue().toString(Buffer,
1569                           /*Radix=*/10, IL->getType()->isSignedIntegerType());
1570   JOS.attribute("value", Buffer);
1571 }
1572 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1573   // FIXME: This should probably print the character literal as a string,
1574   // rather than as a numerical value. It would be nice if the behavior matched
1575   // what we do to print a string literal; right now, it is impossible to tell
1576   // the difference between 'a' and L'a' in C from the JSON output.
1577   JOS.attribute("value", CL->getValue());
1578 }
1579 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1580   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1581 }
1582 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1583   llvm::SmallString<16> Buffer;
1584   FL->getValue().toString(Buffer);
1585   JOS.attribute("value", Buffer);
1586 }
1587 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1588   std::string Buffer;
1589   llvm::raw_string_ostream SS(Buffer);
1590   SL->outputString(SS);
1591   JOS.attribute("value", SS.str());
1592 }
1593 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1594   JOS.attribute("value", BLE->getValue());
1595 }
1596 
1597 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1598   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1599   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1600   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1601   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1602   attributeOnlyIfTrue("isConsteval", IS->isConsteval());
1603   attributeOnlyIfTrue("constevalIsNegated", IS->isNegatedConsteval());
1604 }
1605 
1606 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1607   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1608   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1609 }
1610 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1611   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1612 }
1613 
1614 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1615   JOS.attribute("name", LS->getName());
1616   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1617   attributeOnlyIfTrue("sideEntry", LS->isSideEntry());
1618 }
1619 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1620   JOS.attribute("targetLabelDeclId",
1621                 createPointerRepresentation(GS->getLabel()));
1622 }
1623 
1624 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1625   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1626 }
1627 
1628 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1629   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1630   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1631   // null child node and ObjC gets no child node.
1632   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1633 }
1634 
1635 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1636   JOS.attribute("isNull", true);
1637 }
1638 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1639   JOS.attribute("type", createQualType(TA.getAsType()));
1640 }
1641 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1642     const TemplateArgument &TA) {
1643   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1644 }
1645 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1646   JOS.attribute("isNullptr", true);
1647 }
1648 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1649   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1650 }
1651 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1652   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1653   // the output format.
1654 }
1655 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1656     const TemplateArgument &TA) {
1657   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1658   // the output format.
1659 }
1660 void JSONNodeDumper::VisitExpressionTemplateArgument(
1661     const TemplateArgument &TA) {
1662   JOS.attribute("isExpr", true);
1663 }
1664 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1665   JOS.attribute("isPack", true);
1666 }
1667 
1668 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1669   if (Traits)
1670     return Traits->getCommandInfo(CommandID)->Name;
1671   if (const comments::CommandInfo *Info =
1672           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1673     return Info->Name;
1674   return "<invalid>";
1675 }
1676 
1677 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1678                                       const comments::FullComment *) {
1679   JOS.attribute("text", C->getText());
1680 }
1681 
1682 void JSONNodeDumper::visitInlineCommandComment(
1683     const comments::InlineCommandComment *C, const comments::FullComment *) {
1684   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1685 
1686   switch (C->getRenderKind()) {
1687   case comments::InlineCommandRenderKind::Normal:
1688     JOS.attribute("renderKind", "normal");
1689     break;
1690   case comments::InlineCommandRenderKind::Bold:
1691     JOS.attribute("renderKind", "bold");
1692     break;
1693   case comments::InlineCommandRenderKind::Emphasized:
1694     JOS.attribute("renderKind", "emphasized");
1695     break;
1696   case comments::InlineCommandRenderKind::Monospaced:
1697     JOS.attribute("renderKind", "monospaced");
1698     break;
1699   case comments::InlineCommandRenderKind::Anchor:
1700     JOS.attribute("renderKind", "anchor");
1701     break;
1702   }
1703 
1704   llvm::json::Array Args;
1705   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1706     Args.push_back(C->getArgText(I));
1707 
1708   if (!Args.empty())
1709     JOS.attribute("args", std::move(Args));
1710 }
1711 
1712 void JSONNodeDumper::visitHTMLStartTagComment(
1713     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1714   JOS.attribute("name", C->getTagName());
1715   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1716   attributeOnlyIfTrue("malformed", C->isMalformed());
1717 
1718   llvm::json::Array Attrs;
1719   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1720     Attrs.push_back(
1721         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1722 
1723   if (!Attrs.empty())
1724     JOS.attribute("attrs", std::move(Attrs));
1725 }
1726 
1727 void JSONNodeDumper::visitHTMLEndTagComment(
1728     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1729   JOS.attribute("name", C->getTagName());
1730 }
1731 
1732 void JSONNodeDumper::visitBlockCommandComment(
1733     const comments::BlockCommandComment *C, const comments::FullComment *) {
1734   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1735 
1736   llvm::json::Array Args;
1737   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1738     Args.push_back(C->getArgText(I));
1739 
1740   if (!Args.empty())
1741     JOS.attribute("args", std::move(Args));
1742 }
1743 
1744 void JSONNodeDumper::visitParamCommandComment(
1745     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1746   switch (C->getDirection()) {
1747   case comments::ParamCommandPassDirection::In:
1748     JOS.attribute("direction", "in");
1749     break;
1750   case comments::ParamCommandPassDirection::Out:
1751     JOS.attribute("direction", "out");
1752     break;
1753   case comments::ParamCommandPassDirection::InOut:
1754     JOS.attribute("direction", "in,out");
1755     break;
1756   }
1757   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1758 
1759   if (C->hasParamName())
1760     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1761                                                   : C->getParamNameAsWritten());
1762 
1763   if (C->isParamIndexValid() && !C->isVarArgParam())
1764     JOS.attribute("paramIdx", C->getParamIndex());
1765 }
1766 
1767 void JSONNodeDumper::visitTParamCommandComment(
1768     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1769   if (C->hasParamName())
1770     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1771                                                 : C->getParamNameAsWritten());
1772   if (C->isPositionValid()) {
1773     llvm::json::Array Positions;
1774     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1775       Positions.push_back(C->getIndex(I));
1776 
1777     if (!Positions.empty())
1778       JOS.attribute("positions", std::move(Positions));
1779   }
1780 }
1781 
1782 void JSONNodeDumper::visitVerbatimBlockComment(
1783     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1784   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1785   JOS.attribute("closeName", C->getCloseName());
1786 }
1787 
1788 void JSONNodeDumper::visitVerbatimBlockLineComment(
1789     const comments::VerbatimBlockLineComment *C,
1790     const comments::FullComment *) {
1791   JOS.attribute("text", C->getText());
1792 }
1793 
1794 void JSONNodeDumper::visitVerbatimLineComment(
1795     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1796   JOS.attribute("text", C->getText());
1797 }
1798 
1799 llvm::json::Object JSONNodeDumper::createFPOptions(FPOptionsOverride FPO) {
1800   llvm::json::Object Ret;
1801 #define OPTION(NAME, TYPE, WIDTH, PREVIOUS)                                    \
1802   if (FPO.has##NAME##Override())                                               \
1803     Ret.try_emplace(#NAME, static_cast<unsigned>(FPO.get##NAME##Override()));
1804 #include "clang/Basic/FPOptions.def"
1805   return Ret;
1806 }
1807 
1808 void JSONNodeDumper::VisitCompoundStmt(const CompoundStmt *S) {
1809   VisitStmt(S);
1810   if (S->hasStoredFPFeatures())
1811     JOS.attribute("fpoptions", createFPOptions(S->getStoredFPFeatures()));
1812 }
1813