xref: /freebsd/contrib/llvm-project/clang/lib/AST/JSONNodeDumper.cpp (revision 5fb307d29b364982acbde82cbf77db3cae486f8c) 
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   llvm::json::Object Ret{{"qualType", QualType::getAsString(SQT, PrintPolicy)}};
319 
320   if (Desugar && !QT.isNull()) {
321     SplitQualType DSQT = QT.getSplitDesugaredType();
322     if (DSQT != SQT)
323       Ret["desugaredQualType"] = QualType::getAsString(DSQT, PrintPolicy);
324     if (const auto *TT = QT->getAs<TypedefType>())
325       Ret["typeAliasDeclId"] = createPointerRepresentation(TT->getDecl());
326   }
327   return Ret;
328 }
329 
330 void JSONNodeDumper::writeBareDeclRef(const Decl *D) {
331   JOS.attribute("id", createPointerRepresentation(D));
332   if (!D)
333     return;
334 
335   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
336   if (const auto *ND = dyn_cast<NamedDecl>(D))
337     JOS.attribute("name", ND->getDeclName().getAsString());
338   if (const auto *VD = dyn_cast<ValueDecl>(D))
339     JOS.attribute("type", createQualType(VD->getType()));
340 }
341 
342 llvm::json::Object JSONNodeDumper::createBareDeclRef(const Decl *D) {
343   llvm::json::Object Ret{{"id", createPointerRepresentation(D)}};
344   if (!D)
345     return Ret;
346 
347   Ret["kind"] = (llvm::Twine(D->getDeclKindName()) + "Decl").str();
348   if (const auto *ND = dyn_cast<NamedDecl>(D))
349     Ret["name"] = ND->getDeclName().getAsString();
350   if (const auto *VD = dyn_cast<ValueDecl>(D))
351     Ret["type"] = createQualType(VD->getType());
352   return Ret;
353 }
354 
355 llvm::json::Array JSONNodeDumper::createCastPath(const CastExpr *C) {
356   llvm::json::Array Ret;
357   if (C->path_empty())
358     return Ret;
359 
360   for (auto I = C->path_begin(), E = C->path_end(); I != E; ++I) {
361     const CXXBaseSpecifier *Base = *I;
362     const auto *RD =
363         cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
364 
365     llvm::json::Object Val{{"name", RD->getName()}};
366     if (Base->isVirtual())
367       Val["isVirtual"] = true;
368     Ret.push_back(std::move(Val));
369   }
370   return Ret;
371 }
372 
373 #define FIELD2(Name, Flag)  if (RD->Flag()) Ret[Name] = true
374 #define FIELD1(Flag)        FIELD2(#Flag, Flag)
375 
376 static llvm::json::Object
377 createDefaultConstructorDefinitionData(const CXXRecordDecl *RD) {
378   llvm::json::Object Ret;
379 
380   FIELD2("exists", hasDefaultConstructor);
381   FIELD2("trivial", hasTrivialDefaultConstructor);
382   FIELD2("nonTrivial", hasNonTrivialDefaultConstructor);
383   FIELD2("userProvided", hasUserProvidedDefaultConstructor);
384   FIELD2("isConstexpr", hasConstexprDefaultConstructor);
385   FIELD2("needsImplicit", needsImplicitDefaultConstructor);
386   FIELD2("defaultedIsConstexpr", defaultedDefaultConstructorIsConstexpr);
387 
388   return Ret;
389 }
390 
391 static llvm::json::Object
392 createCopyConstructorDefinitionData(const CXXRecordDecl *RD) {
393   llvm::json::Object Ret;
394 
395   FIELD2("simple", hasSimpleCopyConstructor);
396   FIELD2("trivial", hasTrivialCopyConstructor);
397   FIELD2("nonTrivial", hasNonTrivialCopyConstructor);
398   FIELD2("userDeclared", hasUserDeclaredCopyConstructor);
399   FIELD2("hasConstParam", hasCopyConstructorWithConstParam);
400   FIELD2("implicitHasConstParam", implicitCopyConstructorHasConstParam);
401   FIELD2("needsImplicit", needsImplicitCopyConstructor);
402   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyConstructor);
403   if (!RD->needsOverloadResolutionForCopyConstructor())
404     FIELD2("defaultedIsDeleted", defaultedCopyConstructorIsDeleted);
405 
406   return Ret;
407 }
408 
409 static llvm::json::Object
410 createMoveConstructorDefinitionData(const CXXRecordDecl *RD) {
411   llvm::json::Object Ret;
412 
413   FIELD2("exists", hasMoveConstructor);
414   FIELD2("simple", hasSimpleMoveConstructor);
415   FIELD2("trivial", hasTrivialMoveConstructor);
416   FIELD2("nonTrivial", hasNonTrivialMoveConstructor);
417   FIELD2("userDeclared", hasUserDeclaredMoveConstructor);
418   FIELD2("needsImplicit", needsImplicitMoveConstructor);
419   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveConstructor);
420   if (!RD->needsOverloadResolutionForMoveConstructor())
421     FIELD2("defaultedIsDeleted", defaultedMoveConstructorIsDeleted);
422 
423   return Ret;
424 }
425 
426 static llvm::json::Object
427 createCopyAssignmentDefinitionData(const CXXRecordDecl *RD) {
428   llvm::json::Object Ret;
429 
430   FIELD2("simple", hasSimpleCopyAssignment);
431   FIELD2("trivial", hasTrivialCopyAssignment);
432   FIELD2("nonTrivial", hasNonTrivialCopyAssignment);
433   FIELD2("hasConstParam", hasCopyAssignmentWithConstParam);
434   FIELD2("implicitHasConstParam", implicitCopyAssignmentHasConstParam);
435   FIELD2("userDeclared", hasUserDeclaredCopyAssignment);
436   FIELD2("needsImplicit", needsImplicitCopyAssignment);
437   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyAssignment);
438 
439   return Ret;
440 }
441 
442 static llvm::json::Object
443 createMoveAssignmentDefinitionData(const CXXRecordDecl *RD) {
444   llvm::json::Object Ret;
445 
446   FIELD2("exists", hasMoveAssignment);
447   FIELD2("simple", hasSimpleMoveAssignment);
448   FIELD2("trivial", hasTrivialMoveAssignment);
449   FIELD2("nonTrivial", hasNonTrivialMoveAssignment);
450   FIELD2("userDeclared", hasUserDeclaredMoveAssignment);
451   FIELD2("needsImplicit", needsImplicitMoveAssignment);
452   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveAssignment);
453 
454   return Ret;
455 }
456 
457 static llvm::json::Object
458 createDestructorDefinitionData(const CXXRecordDecl *RD) {
459   llvm::json::Object Ret;
460 
461   FIELD2("simple", hasSimpleDestructor);
462   FIELD2("irrelevant", hasIrrelevantDestructor);
463   FIELD2("trivial", hasTrivialDestructor);
464   FIELD2("nonTrivial", hasNonTrivialDestructor);
465   FIELD2("userDeclared", hasUserDeclaredDestructor);
466   FIELD2("needsImplicit", needsImplicitDestructor);
467   FIELD2("needsOverloadResolution", needsOverloadResolutionForDestructor);
468   if (!RD->needsOverloadResolutionForDestructor())
469     FIELD2("defaultedIsDeleted", defaultedDestructorIsDeleted);
470 
471   return Ret;
472 }
473 
474 llvm::json::Object
475 JSONNodeDumper::createCXXRecordDefinitionData(const CXXRecordDecl *RD) {
476   llvm::json::Object Ret;
477 
478   // This data is common to all C++ classes.
479   FIELD1(isGenericLambda);
480   FIELD1(isLambda);
481   FIELD1(isEmpty);
482   FIELD1(isAggregate);
483   FIELD1(isStandardLayout);
484   FIELD1(isTriviallyCopyable);
485   FIELD1(isPOD);
486   FIELD1(isTrivial);
487   FIELD1(isPolymorphic);
488   FIELD1(isAbstract);
489   FIELD1(isLiteral);
490   FIELD1(canPassInRegisters);
491   FIELD1(hasUserDeclaredConstructor);
492   FIELD1(hasConstexprNonCopyMoveConstructor);
493   FIELD1(hasMutableFields);
494   FIELD1(hasVariantMembers);
495   FIELD2("canConstDefaultInit", allowConstDefaultInit);
496 
497   Ret["defaultCtor"] = createDefaultConstructorDefinitionData(RD);
498   Ret["copyCtor"] = createCopyConstructorDefinitionData(RD);
499   Ret["moveCtor"] = createMoveConstructorDefinitionData(RD);
500   Ret["copyAssign"] = createCopyAssignmentDefinitionData(RD);
501   Ret["moveAssign"] = createMoveAssignmentDefinitionData(RD);
502   Ret["dtor"] = createDestructorDefinitionData(RD);
503 
504   return Ret;
505 }
506 
507 #undef FIELD1
508 #undef FIELD2
509 
510 std::string JSONNodeDumper::createAccessSpecifier(AccessSpecifier AS) {
511   const auto AccessSpelling = getAccessSpelling(AS);
512   if (AccessSpelling.empty())
513     return "none";
514   return AccessSpelling.str();
515 }
516 
517 llvm::json::Object
518 JSONNodeDumper::createCXXBaseSpecifier(const CXXBaseSpecifier &BS) {
519   llvm::json::Object Ret;
520 
521   Ret["type"] = createQualType(BS.getType());
522   Ret["access"] = createAccessSpecifier(BS.getAccessSpecifier());
523   Ret["writtenAccess"] =
524       createAccessSpecifier(BS.getAccessSpecifierAsWritten());
525   if (BS.isVirtual())
526     Ret["isVirtual"] = true;
527   if (BS.isPackExpansion())
528     Ret["isPackExpansion"] = true;
529 
530   return Ret;
531 }
532 
533 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
534   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
535   if (!TT->typeMatchesDecl())
536     JOS.attribute("type", createQualType(TT->desugar()));
537 }
538 
539 void JSONNodeDumper::VisitUsingType(const UsingType *TT) {
540   JOS.attribute("decl", createBareDeclRef(TT->getFoundDecl()));
541   if (!TT->typeMatchesDecl())
542     JOS.attribute("type", createQualType(TT->desugar()));
543 }
544 
545 void JSONNodeDumper::VisitFunctionType(const FunctionType *T) {
546   FunctionType::ExtInfo E = T->getExtInfo();
547   attributeOnlyIfTrue("noreturn", E.getNoReturn());
548   attributeOnlyIfTrue("producesResult", E.getProducesResult());
549   if (E.getHasRegParm())
550     JOS.attribute("regParm", E.getRegParm());
551   JOS.attribute("cc", FunctionType::getNameForCallConv(E.getCC()));
552 }
553 
554 void JSONNodeDumper::VisitFunctionProtoType(const FunctionProtoType *T) {
555   FunctionProtoType::ExtProtoInfo E = T->getExtProtoInfo();
556   attributeOnlyIfTrue("trailingReturn", E.HasTrailingReturn);
557   attributeOnlyIfTrue("const", T->isConst());
558   attributeOnlyIfTrue("volatile", T->isVolatile());
559   attributeOnlyIfTrue("restrict", T->isRestrict());
560   attributeOnlyIfTrue("variadic", E.Variadic);
561   switch (E.RefQualifier) {
562   case RQ_LValue: JOS.attribute("refQualifier", "&"); break;
563   case RQ_RValue: JOS.attribute("refQualifier", "&&"); break;
564   case RQ_None: break;
565   }
566   switch (E.ExceptionSpec.Type) {
567   case EST_DynamicNone:
568   case EST_Dynamic: {
569     JOS.attribute("exceptionSpec", "throw");
570     llvm::json::Array Types;
571     for (QualType QT : E.ExceptionSpec.Exceptions)
572       Types.push_back(createQualType(QT));
573     JOS.attribute("exceptionTypes", std::move(Types));
574   } break;
575   case EST_MSAny:
576     JOS.attribute("exceptionSpec", "throw");
577     JOS.attribute("throwsAny", true);
578     break;
579   case EST_BasicNoexcept:
580     JOS.attribute("exceptionSpec", "noexcept");
581     break;
582   case EST_NoexceptTrue:
583   case EST_NoexceptFalse:
584     JOS.attribute("exceptionSpec", "noexcept");
585     JOS.attribute("conditionEvaluatesTo",
586                 E.ExceptionSpec.Type == EST_NoexceptTrue);
587     //JOS.attributeWithCall("exceptionSpecExpr",
588     //                    [this, E]() { Visit(E.ExceptionSpec.NoexceptExpr); });
589     break;
590   case EST_NoThrow:
591     JOS.attribute("exceptionSpec", "nothrow");
592     break;
593   // FIXME: I cannot find a way to trigger these cases while dumping the AST. I
594   // suspect you can only run into them when executing an AST dump from within
595   // the debugger, which is not a use case we worry about for the JSON dumping
596   // feature.
597   case EST_DependentNoexcept:
598   case EST_Unevaluated:
599   case EST_Uninstantiated:
600   case EST_Unparsed:
601   case EST_None: break;
602   }
603   VisitFunctionType(T);
604 }
605 
606 void JSONNodeDumper::VisitRValueReferenceType(const ReferenceType *RT) {
607   attributeOnlyIfTrue("spelledAsLValue", RT->isSpelledAsLValue());
608 }
609 
610 void JSONNodeDumper::VisitArrayType(const ArrayType *AT) {
611   switch (AT->getSizeModifier()) {
612   case ArrayType::Star:
613     JOS.attribute("sizeModifier", "*");
614     break;
615   case ArrayType::Static:
616     JOS.attribute("sizeModifier", "static");
617     break;
618   case ArrayType::Normal:
619     break;
620   }
621 
622   std::string Str = AT->getIndexTypeQualifiers().getAsString();
623   if (!Str.empty())
624     JOS.attribute("indexTypeQualifiers", Str);
625 }
626 
627 void JSONNodeDumper::VisitConstantArrayType(const ConstantArrayType *CAT) {
628   // FIXME: this should use ZExt instead of SExt, but JSON doesn't allow a
629   // narrowing conversion to int64_t so it cannot be expressed.
630   JOS.attribute("size", CAT->getSize().getSExtValue());
631   VisitArrayType(CAT);
632 }
633 
634 void JSONNodeDumper::VisitDependentSizedExtVectorType(
635     const DependentSizedExtVectorType *VT) {
636   JOS.attributeObject(
637       "attrLoc", [VT, this] { writeSourceLocation(VT->getAttributeLoc()); });
638 }
639 
640 void JSONNodeDumper::VisitVectorType(const VectorType *VT) {
641   JOS.attribute("numElements", VT->getNumElements());
642   switch (VT->getVectorKind()) {
643   case VectorType::GenericVector:
644     break;
645   case VectorType::AltiVecVector:
646     JOS.attribute("vectorKind", "altivec");
647     break;
648   case VectorType::AltiVecPixel:
649     JOS.attribute("vectorKind", "altivec pixel");
650     break;
651   case VectorType::AltiVecBool:
652     JOS.attribute("vectorKind", "altivec bool");
653     break;
654   case VectorType::NeonVector:
655     JOS.attribute("vectorKind", "neon");
656     break;
657   case VectorType::NeonPolyVector:
658     JOS.attribute("vectorKind", "neon poly");
659     break;
660   case VectorType::SveFixedLengthDataVector:
661     JOS.attribute("vectorKind", "fixed-length sve data vector");
662     break;
663   case VectorType::SveFixedLengthPredicateVector:
664     JOS.attribute("vectorKind", "fixed-length sve predicate vector");
665     break;
666   case VectorType::RVVFixedLengthDataVector:
667     JOS.attribute("vectorKind", "fixed-length rvv data vector");
668     break;
669   }
670 }
671 
672 void JSONNodeDumper::VisitUnresolvedUsingType(const UnresolvedUsingType *UUT) {
673   JOS.attribute("decl", createBareDeclRef(UUT->getDecl()));
674 }
675 
676 void JSONNodeDumper::VisitUnaryTransformType(const UnaryTransformType *UTT) {
677   switch (UTT->getUTTKind()) {
678 #define TRANSFORM_TYPE_TRAIT_DEF(Enum, Trait)                                  \
679   case UnaryTransformType::Enum:                                               \
680     JOS.attribute("transformKind", #Trait);                                    \
681     break;
682 #include "clang/Basic/TransformTypeTraits.def"
683   }
684 }
685 
686 void JSONNodeDumper::VisitTagType(const TagType *TT) {
687   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
688 }
689 
690 void JSONNodeDumper::VisitTemplateTypeParmType(
691     const TemplateTypeParmType *TTPT) {
692   JOS.attribute("depth", TTPT->getDepth());
693   JOS.attribute("index", TTPT->getIndex());
694   attributeOnlyIfTrue("isPack", TTPT->isParameterPack());
695   JOS.attribute("decl", createBareDeclRef(TTPT->getDecl()));
696 }
697 
698 void JSONNodeDumper::VisitSubstTemplateTypeParmType(
699     const SubstTemplateTypeParmType *STTPT) {
700   JOS.attribute("index", STTPT->getIndex());
701   if (auto PackIndex = STTPT->getPackIndex())
702     JOS.attribute("pack_index", *PackIndex);
703 }
704 
705 void JSONNodeDumper::VisitSubstTemplateTypeParmPackType(
706     const SubstTemplateTypeParmPackType *T) {
707   JOS.attribute("index", T->getIndex());
708 }
709 
710 void JSONNodeDumper::VisitAutoType(const AutoType *AT) {
711   JOS.attribute("undeduced", !AT->isDeduced());
712   switch (AT->getKeyword()) {
713   case AutoTypeKeyword::Auto:
714     JOS.attribute("typeKeyword", "auto");
715     break;
716   case AutoTypeKeyword::DecltypeAuto:
717     JOS.attribute("typeKeyword", "decltype(auto)");
718     break;
719   case AutoTypeKeyword::GNUAutoType:
720     JOS.attribute("typeKeyword", "__auto_type");
721     break;
722   }
723 }
724 
725 void JSONNodeDumper::VisitTemplateSpecializationType(
726     const TemplateSpecializationType *TST) {
727   attributeOnlyIfTrue("isAlias", TST->isTypeAlias());
728 
729   std::string Str;
730   llvm::raw_string_ostream OS(Str);
731   TST->getTemplateName().print(OS, PrintPolicy);
732   JOS.attribute("templateName", OS.str());
733 }
734 
735 void JSONNodeDumper::VisitInjectedClassNameType(
736     const InjectedClassNameType *ICNT) {
737   JOS.attribute("decl", createBareDeclRef(ICNT->getDecl()));
738 }
739 
740 void JSONNodeDumper::VisitObjCInterfaceType(const ObjCInterfaceType *OIT) {
741   JOS.attribute("decl", createBareDeclRef(OIT->getDecl()));
742 }
743 
744 void JSONNodeDumper::VisitPackExpansionType(const PackExpansionType *PET) {
745   if (std::optional<unsigned> N = PET->getNumExpansions())
746     JOS.attribute("numExpansions", *N);
747 }
748 
749 void JSONNodeDumper::VisitElaboratedType(const ElaboratedType *ET) {
750   if (const NestedNameSpecifier *NNS = ET->getQualifier()) {
751     std::string Str;
752     llvm::raw_string_ostream OS(Str);
753     NNS->print(OS, PrintPolicy, /*ResolveTemplateArgs*/ true);
754     JOS.attribute("qualifier", OS.str());
755   }
756   if (const TagDecl *TD = ET->getOwnedTagDecl())
757     JOS.attribute("ownedTagDecl", createBareDeclRef(TD));
758 }
759 
760 void JSONNodeDumper::VisitMacroQualifiedType(const MacroQualifiedType *MQT) {
761   JOS.attribute("macroName", MQT->getMacroIdentifier()->getName());
762 }
763 
764 void JSONNodeDumper::VisitMemberPointerType(const MemberPointerType *MPT) {
765   attributeOnlyIfTrue("isData", MPT->isMemberDataPointer());
766   attributeOnlyIfTrue("isFunction", MPT->isMemberFunctionPointer());
767 }
768 
769 void JSONNodeDumper::VisitNamedDecl(const NamedDecl *ND) {
770   if (ND && ND->getDeclName()) {
771     JOS.attribute("name", ND->getNameAsString());
772     // FIXME: There are likely other contexts in which it makes no sense to ask
773     // for a mangled name.
774     if (isa<RequiresExprBodyDecl>(ND->getDeclContext()))
775       return;
776 
777     // If the declaration is dependent or is in a dependent context, then the
778     // mangling is unlikely to be meaningful (and in some cases may cause
779     // "don't know how to mangle this" assertion failures.
780     if (ND->isTemplated())
781       return;
782 
783     // Mangled names are not meaningful for locals, and may not be well-defined
784     // in the case of VLAs.
785     auto *VD = dyn_cast<VarDecl>(ND);
786     if (VD && VD->hasLocalStorage())
787       return;
788 
789     std::string MangledName = ASTNameGen.getName(ND);
790     if (!MangledName.empty())
791       JOS.attribute("mangledName", MangledName);
792   }
793 }
794 
795 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
796   VisitNamedDecl(TD);
797   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
798 }
799 
800 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
801   VisitNamedDecl(TAD);
802   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
803 }
804 
805 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
806   VisitNamedDecl(ND);
807   attributeOnlyIfTrue("isInline", ND->isInline());
808   attributeOnlyIfTrue("isNested", ND->isNested());
809   if (!ND->isOriginalNamespace())
810     JOS.attribute("originalNamespace",
811                   createBareDeclRef(ND->getOriginalNamespace()));
812 }
813 
814 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
815   JOS.attribute("nominatedNamespace",
816                 createBareDeclRef(UDD->getNominatedNamespace()));
817 }
818 
819 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
820   VisitNamedDecl(NAD);
821   JOS.attribute("aliasedNamespace",
822                 createBareDeclRef(NAD->getAliasedNamespace()));
823 }
824 
825 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
826   std::string Name;
827   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
828     llvm::raw_string_ostream SOS(Name);
829     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
830   }
831   Name += UD->getNameAsString();
832   JOS.attribute("name", Name);
833 }
834 
835 void JSONNodeDumper::VisitUsingEnumDecl(const UsingEnumDecl *UED) {
836   JOS.attribute("target", createBareDeclRef(UED->getEnumDecl()));
837 }
838 
839 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
840   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
841 }
842 
843 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
844   VisitNamedDecl(VD);
845   JOS.attribute("type", createQualType(VD->getType()));
846 
847   StorageClass SC = VD->getStorageClass();
848   if (SC != SC_None)
849     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
850   switch (VD->getTLSKind()) {
851   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
852   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
853   case VarDecl::TLS_None: break;
854   }
855   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
856   attributeOnlyIfTrue("inline", VD->isInline());
857   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
858   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
859   if (VD->hasInit()) {
860     switch (VD->getInitStyle()) {
861     case VarDecl::CInit: JOS.attribute("init", "c");  break;
862     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
863     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
864     case VarDecl::ParenListInit:
865       JOS.attribute("init", "paren-list");
866       break;
867     }
868   }
869   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
870 }
871 
872 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
873   VisitNamedDecl(FD);
874   JOS.attribute("type", createQualType(FD->getType()));
875   attributeOnlyIfTrue("mutable", FD->isMutable());
876   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
877   attributeOnlyIfTrue("isBitfield", FD->isBitField());
878   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
879 }
880 
881 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
882   VisitNamedDecl(FD);
883   JOS.attribute("type", createQualType(FD->getType()));
884   StorageClass SC = FD->getStorageClass();
885   if (SC != SC_None)
886     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
887   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
888   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
889   attributeOnlyIfTrue("pure", FD->isPure());
890   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
891   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
892   attributeOnlyIfTrue("variadic", FD->isVariadic());
893   attributeOnlyIfTrue("immediate", FD->isImmediateFunction());
894 
895   if (FD->isDefaulted())
896     JOS.attribute("explicitlyDefaulted",
897                   FD->isDeleted() ? "deleted" : "default");
898 }
899 
900 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
901   VisitNamedDecl(ED);
902   if (ED->isFixed())
903     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
904   if (ED->isScoped())
905     JOS.attribute("scopedEnumTag",
906                   ED->isScopedUsingClassTag() ? "class" : "struct");
907 }
908 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
909   VisitNamedDecl(ECD);
910   JOS.attribute("type", createQualType(ECD->getType()));
911 }
912 
913 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
914   VisitNamedDecl(RD);
915   JOS.attribute("tagUsed", RD->getKindName());
916   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
917 }
918 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
919   VisitRecordDecl(RD);
920 
921   // All other information requires a complete definition.
922   if (!RD->isCompleteDefinition())
923     return;
924 
925   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
926   if (RD->getNumBases()) {
927     JOS.attributeArray("bases", [this, RD] {
928       for (const auto &Spec : RD->bases())
929         JOS.value(createCXXBaseSpecifier(Spec));
930     });
931   }
932 }
933 
934 void JSONNodeDumper::VisitHLSLBufferDecl(const HLSLBufferDecl *D) {
935   VisitNamedDecl(D);
936   JOS.attribute("bufferKind", D->isCBuffer() ? "cbuffer" : "tbuffer");
937 }
938 
939 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
940   VisitNamedDecl(D);
941   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
942   JOS.attribute("depth", D->getDepth());
943   JOS.attribute("index", D->getIndex());
944   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
945 
946   if (D->hasDefaultArgument())
947     JOS.attributeObject("defaultArg", [=] {
948       Visit(D->getDefaultArgument(), SourceRange(),
949             D->getDefaultArgStorage().getInheritedFrom(),
950             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
951     });
952 }
953 
954 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
955     const NonTypeTemplateParmDecl *D) {
956   VisitNamedDecl(D);
957   JOS.attribute("type", createQualType(D->getType()));
958   JOS.attribute("depth", D->getDepth());
959   JOS.attribute("index", D->getIndex());
960   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
961 
962   if (D->hasDefaultArgument())
963     JOS.attributeObject("defaultArg", [=] {
964       Visit(D->getDefaultArgument(), SourceRange(),
965             D->getDefaultArgStorage().getInheritedFrom(),
966             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
967     });
968 }
969 
970 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
971     const TemplateTemplateParmDecl *D) {
972   VisitNamedDecl(D);
973   JOS.attribute("depth", D->getDepth());
974   JOS.attribute("index", D->getIndex());
975   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
976 
977   if (D->hasDefaultArgument())
978     JOS.attributeObject("defaultArg", [=] {
979       const auto *InheritedFrom = D->getDefaultArgStorage().getInheritedFrom();
980       Visit(D->getDefaultArgument().getArgument(),
981             InheritedFrom ? InheritedFrom->getSourceRange() : SourceLocation{},
982             InheritedFrom,
983             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
984     });
985 }
986 
987 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
988   StringRef Lang;
989   switch (LSD->getLanguage()) {
990   case LinkageSpecDecl::lang_c: Lang = "C"; break;
991   case LinkageSpecDecl::lang_cxx: Lang = "C++"; break;
992   }
993   JOS.attribute("language", Lang);
994   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
995 }
996 
997 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
998   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
999 }
1000 
1001 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
1002   if (const TypeSourceInfo *T = FD->getFriendType())
1003     JOS.attribute("type", createQualType(T->getType()));
1004 }
1005 
1006 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
1007   VisitNamedDecl(D);
1008   JOS.attribute("type", createQualType(D->getType()));
1009   attributeOnlyIfTrue("synthesized", D->getSynthesize());
1010   switch (D->getAccessControl()) {
1011   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
1012   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
1013   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
1014   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
1015   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
1016   }
1017 }
1018 
1019 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
1020   VisitNamedDecl(D);
1021   JOS.attribute("returnType", createQualType(D->getReturnType()));
1022   JOS.attribute("instance", D->isInstanceMethod());
1023   attributeOnlyIfTrue("variadic", D->isVariadic());
1024 }
1025 
1026 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
1027   VisitNamedDecl(D);
1028   JOS.attribute("type", createQualType(D->getUnderlyingType()));
1029   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
1030   switch (D->getVariance()) {
1031   case ObjCTypeParamVariance::Invariant:
1032     break;
1033   case ObjCTypeParamVariance::Covariant:
1034     JOS.attribute("variance", "covariant");
1035     break;
1036   case ObjCTypeParamVariance::Contravariant:
1037     JOS.attribute("variance", "contravariant");
1038     break;
1039   }
1040 }
1041 
1042 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
1043   VisitNamedDecl(D);
1044   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1045   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1046 
1047   llvm::json::Array Protocols;
1048   for (const auto* P : D->protocols())
1049     Protocols.push_back(createBareDeclRef(P));
1050   if (!Protocols.empty())
1051     JOS.attribute("protocols", std::move(Protocols));
1052 }
1053 
1054 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
1055   VisitNamedDecl(D);
1056   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1057   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
1058 }
1059 
1060 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
1061   VisitNamedDecl(D);
1062 
1063   llvm::json::Array Protocols;
1064   for (const auto *P : D->protocols())
1065     Protocols.push_back(createBareDeclRef(P));
1066   if (!Protocols.empty())
1067     JOS.attribute("protocols", std::move(Protocols));
1068 }
1069 
1070 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
1071   VisitNamedDecl(D);
1072   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1073   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1074 
1075   llvm::json::Array Protocols;
1076   for (const auto* P : D->protocols())
1077     Protocols.push_back(createBareDeclRef(P));
1078   if (!Protocols.empty())
1079     JOS.attribute("protocols", std::move(Protocols));
1080 }
1081 
1082 void JSONNodeDumper::VisitObjCImplementationDecl(
1083     const ObjCImplementationDecl *D) {
1084   VisitNamedDecl(D);
1085   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1086   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1087 }
1088 
1089 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
1090     const ObjCCompatibleAliasDecl *D) {
1091   VisitNamedDecl(D);
1092   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1093 }
1094 
1095 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
1096   VisitNamedDecl(D);
1097   JOS.attribute("type", createQualType(D->getType()));
1098 
1099   switch (D->getPropertyImplementation()) {
1100   case ObjCPropertyDecl::None: break;
1101   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
1102   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
1103   }
1104 
1105   ObjCPropertyAttribute::Kind Attrs = D->getPropertyAttributes();
1106   if (Attrs != ObjCPropertyAttribute::kind_noattr) {
1107     if (Attrs & ObjCPropertyAttribute::kind_getter)
1108       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
1109     if (Attrs & ObjCPropertyAttribute::kind_setter)
1110       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
1111     attributeOnlyIfTrue("readonly",
1112                         Attrs & ObjCPropertyAttribute::kind_readonly);
1113     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyAttribute::kind_assign);
1114     attributeOnlyIfTrue("readwrite",
1115                         Attrs & ObjCPropertyAttribute::kind_readwrite);
1116     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyAttribute::kind_retain);
1117     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyAttribute::kind_copy);
1118     attributeOnlyIfTrue("nonatomic",
1119                         Attrs & ObjCPropertyAttribute::kind_nonatomic);
1120     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyAttribute::kind_atomic);
1121     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyAttribute::kind_weak);
1122     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyAttribute::kind_strong);
1123     attributeOnlyIfTrue("unsafe_unretained",
1124                         Attrs & ObjCPropertyAttribute::kind_unsafe_unretained);
1125     attributeOnlyIfTrue("class", Attrs & ObjCPropertyAttribute::kind_class);
1126     attributeOnlyIfTrue("direct", Attrs & ObjCPropertyAttribute::kind_direct);
1127     attributeOnlyIfTrue("nullability",
1128                         Attrs & ObjCPropertyAttribute::kind_nullability);
1129     attributeOnlyIfTrue("null_resettable",
1130                         Attrs & ObjCPropertyAttribute::kind_null_resettable);
1131   }
1132 }
1133 
1134 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
1135   VisitNamedDecl(D->getPropertyDecl());
1136   JOS.attribute("implKind", D->getPropertyImplementation() ==
1137                                     ObjCPropertyImplDecl::Synthesize
1138                                 ? "synthesize"
1139                                 : "dynamic");
1140   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
1141   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
1142 }
1143 
1144 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
1145   attributeOnlyIfTrue("variadic", D->isVariadic());
1146   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
1147 }
1148 
1149 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1150   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1151 }
1152 
1153 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1154   std::string Str;
1155   llvm::raw_string_ostream OS(Str);
1156 
1157   OME->getSelector().print(OS);
1158   JOS.attribute("selector", OS.str());
1159 
1160   switch (OME->getReceiverKind()) {
1161   case ObjCMessageExpr::Instance:
1162     JOS.attribute("receiverKind", "instance");
1163     break;
1164   case ObjCMessageExpr::Class:
1165     JOS.attribute("receiverKind", "class");
1166     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1167     break;
1168   case ObjCMessageExpr::SuperInstance:
1169     JOS.attribute("receiverKind", "super (instance)");
1170     JOS.attribute("superType", createQualType(OME->getSuperType()));
1171     break;
1172   case ObjCMessageExpr::SuperClass:
1173     JOS.attribute("receiverKind", "super (class)");
1174     JOS.attribute("superType", createQualType(OME->getSuperType()));
1175     break;
1176   }
1177 
1178   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1179   if (OME->getType() != CallReturnTy)
1180     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1181 }
1182 
1183 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1184   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1185     std::string Str;
1186     llvm::raw_string_ostream OS(Str);
1187 
1188     MD->getSelector().print(OS);
1189     JOS.attribute("selector", OS.str());
1190   }
1191 }
1192 
1193 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1194   std::string Str;
1195   llvm::raw_string_ostream OS(Str);
1196 
1197   OSE->getSelector().print(OS);
1198   JOS.attribute("selector", OS.str());
1199 }
1200 
1201 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1202   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1203 }
1204 
1205 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1206   if (OPRE->isImplicitProperty()) {
1207     JOS.attribute("propertyKind", "implicit");
1208     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1209       JOS.attribute("getter", createBareDeclRef(MD));
1210     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1211       JOS.attribute("setter", createBareDeclRef(MD));
1212   } else {
1213     JOS.attribute("propertyKind", "explicit");
1214     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1215   }
1216 
1217   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1218   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1219   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1220 }
1221 
1222 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1223     const ObjCSubscriptRefExpr *OSRE) {
1224   JOS.attribute("subscriptKind",
1225                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1226 
1227   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1228     JOS.attribute("getter", createBareDeclRef(MD));
1229   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1230     JOS.attribute("setter", createBareDeclRef(MD));
1231 }
1232 
1233 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1234   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1235   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1236   JOS.attribute("isArrow", OIRE->isArrow());
1237 }
1238 
1239 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1240   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1241 }
1242 
1243 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1244   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1245   if (DRE->getDecl() != DRE->getFoundDecl())
1246     JOS.attribute("foundReferencedDecl",
1247                   createBareDeclRef(DRE->getFoundDecl()));
1248   switch (DRE->isNonOdrUse()) {
1249   case NOUR_None: break;
1250   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1251   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1252   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1253   }
1254   attributeOnlyIfTrue("isImmediateEscalating", DRE->isImmediateEscalating());
1255 }
1256 
1257 void JSONNodeDumper::VisitSYCLUniqueStableNameExpr(
1258     const SYCLUniqueStableNameExpr *E) {
1259   JOS.attribute("typeSourceInfo",
1260                 createQualType(E->getTypeSourceInfo()->getType()));
1261 }
1262 
1263 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1264   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1265 }
1266 
1267 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1268   JOS.attribute("isPostfix", UO->isPostfix());
1269   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1270   if (!UO->canOverflow())
1271     JOS.attribute("canOverflow", false);
1272 }
1273 
1274 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1275   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1276 }
1277 
1278 void JSONNodeDumper::VisitCompoundAssignOperator(
1279     const CompoundAssignOperator *CAO) {
1280   VisitBinaryOperator(CAO);
1281   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1282   JOS.attribute("computeResultType",
1283                 createQualType(CAO->getComputationResultType()));
1284 }
1285 
1286 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1287   // Note, we always write this Boolean field because the information it conveys
1288   // is critical to understanding the AST node.
1289   ValueDecl *VD = ME->getMemberDecl();
1290   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1291   JOS.attribute("isArrow", ME->isArrow());
1292   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1293   switch (ME->isNonOdrUse()) {
1294   case NOUR_None: break;
1295   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1296   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1297   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1298   }
1299 }
1300 
1301 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1302   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1303   attributeOnlyIfTrue("isArray", NE->isArray());
1304   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1305   switch (NE->getInitializationStyle()) {
1306   case CXXNewExpr::NoInit: break;
1307   case CXXNewExpr::CallInit: JOS.attribute("initStyle", "call"); break;
1308   case CXXNewExpr::ListInit: JOS.attribute("initStyle", "list"); break;
1309   }
1310   if (const FunctionDecl *FD = NE->getOperatorNew())
1311     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1312   if (const FunctionDecl *FD = NE->getOperatorDelete())
1313     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1314 }
1315 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1316   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1317   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1318   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1319   if (const FunctionDecl *FD = DE->getOperatorDelete())
1320     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1321 }
1322 
1323 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1324   attributeOnlyIfTrue("implicit", TE->isImplicit());
1325 }
1326 
1327 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1328   JOS.attribute("castKind", CE->getCastKindName());
1329   llvm::json::Array Path = createCastPath(CE);
1330   if (!Path.empty())
1331     JOS.attribute("path", std::move(Path));
1332   // FIXME: This may not be useful information as it can be obtusely gleaned
1333   // from the inner[] array.
1334   if (const NamedDecl *ND = CE->getConversionFunction())
1335     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1336 }
1337 
1338 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1339   VisitCastExpr(ICE);
1340   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1341 }
1342 
1343 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1344   attributeOnlyIfTrue("adl", CE->usesADL());
1345 }
1346 
1347 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1348     const UnaryExprOrTypeTraitExpr *TTE) {
1349   JOS.attribute("name", getTraitSpelling(TTE->getKind()));
1350   if (TTE->isArgumentType())
1351     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1352 }
1353 
1354 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1355   VisitNamedDecl(SOPE->getPack());
1356 }
1357 
1358 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1359     const UnresolvedLookupExpr *ULE) {
1360   JOS.attribute("usesADL", ULE->requiresADL());
1361   JOS.attribute("name", ULE->getName().getAsString());
1362 
1363   JOS.attributeArray("lookups", [this, ULE] {
1364     for (const NamedDecl *D : ULE->decls())
1365       JOS.value(createBareDeclRef(D));
1366   });
1367 }
1368 
1369 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1370   JOS.attribute("name", ALE->getLabel()->getName());
1371   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1372 }
1373 
1374 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1375   if (CTE->isTypeOperand()) {
1376     QualType Adjusted = CTE->getTypeOperand(Ctx);
1377     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1378     JOS.attribute("typeArg", createQualType(Unadjusted));
1379     if (Adjusted != Unadjusted)
1380       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1381   }
1382 }
1383 
1384 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1385   if (CE->getResultAPValueKind() != APValue::None)
1386     Visit(CE->getAPValueResult(), CE->getType());
1387 }
1388 
1389 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1390   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1391     JOS.attribute("field", createBareDeclRef(FD));
1392 }
1393 
1394 void JSONNodeDumper::VisitGenericSelectionExpr(
1395     const GenericSelectionExpr *GSE) {
1396   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1397 }
1398 
1399 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1400     const CXXUnresolvedConstructExpr *UCE) {
1401   if (UCE->getType() != UCE->getTypeAsWritten())
1402     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1403   attributeOnlyIfTrue("list", UCE->isListInitialization());
1404 }
1405 
1406 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1407   CXXConstructorDecl *Ctor = CE->getConstructor();
1408   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1409   attributeOnlyIfTrue("elidable", CE->isElidable());
1410   attributeOnlyIfTrue("list", CE->isListInitialization());
1411   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1412   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1413   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1414   attributeOnlyIfTrue("isImmediateEscalating", CE->isImmediateEscalating());
1415 
1416   switch (CE->getConstructionKind()) {
1417   case CXXConstructExpr::CK_Complete:
1418     JOS.attribute("constructionKind", "complete");
1419     break;
1420   case CXXConstructExpr::CK_Delegating:
1421     JOS.attribute("constructionKind", "delegating");
1422     break;
1423   case CXXConstructExpr::CK_NonVirtualBase:
1424     JOS.attribute("constructionKind", "non-virtual base");
1425     break;
1426   case CXXConstructExpr::CK_VirtualBase:
1427     JOS.attribute("constructionKind", "virtual base");
1428     break;
1429   }
1430 }
1431 
1432 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1433   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1434                       EWC->cleanupsHaveSideEffects());
1435   if (EWC->getNumObjects()) {
1436     JOS.attributeArray("cleanups", [this, EWC] {
1437       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1438         if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
1439           JOS.value(createBareDeclRef(BD));
1440         } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
1441           llvm::json::Object Obj;
1442           Obj["id"] = createPointerRepresentation(CLE);
1443           Obj["kind"] = CLE->getStmtClassName();
1444           JOS.value(std::move(Obj));
1445         } else {
1446           llvm_unreachable("unexpected cleanup object type");
1447         }
1448     });
1449   }
1450 }
1451 
1452 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1453     const CXXBindTemporaryExpr *BTE) {
1454   const CXXTemporary *Temp = BTE->getTemporary();
1455   JOS.attribute("temp", createPointerRepresentation(Temp));
1456   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1457     JOS.attribute("dtor", createBareDeclRef(Dtor));
1458 }
1459 
1460 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1461     const MaterializeTemporaryExpr *MTE) {
1462   if (const ValueDecl *VD = MTE->getExtendingDecl())
1463     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1464 
1465   switch (MTE->getStorageDuration()) {
1466   case SD_Automatic:
1467     JOS.attribute("storageDuration", "automatic");
1468     break;
1469   case SD_Dynamic:
1470     JOS.attribute("storageDuration", "dynamic");
1471     break;
1472   case SD_FullExpression:
1473     JOS.attribute("storageDuration", "full expression");
1474     break;
1475   case SD_Static:
1476     JOS.attribute("storageDuration", "static");
1477     break;
1478   case SD_Thread:
1479     JOS.attribute("storageDuration", "thread");
1480     break;
1481   }
1482 
1483   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1484 }
1485 
1486 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1487     const CXXDependentScopeMemberExpr *DSME) {
1488   JOS.attribute("isArrow", DSME->isArrow());
1489   JOS.attribute("member", DSME->getMember().getAsString());
1490   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1491   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1492                       DSME->hasExplicitTemplateArgs());
1493 
1494   if (DSME->getNumTemplateArgs()) {
1495     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1496       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1497         JOS.object(
1498             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1499     });
1500   }
1501 }
1502 
1503 void JSONNodeDumper::VisitRequiresExpr(const RequiresExpr *RE) {
1504   if (!RE->isValueDependent())
1505     JOS.attribute("satisfied", RE->isSatisfied());
1506 }
1507 
1508 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1509   llvm::SmallString<16> Buffer;
1510   IL->getValue().toString(Buffer,
1511                           /*Radix=*/10, IL->getType()->isSignedIntegerType());
1512   JOS.attribute("value", Buffer);
1513 }
1514 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1515   // FIXME: This should probably print the character literal as a string,
1516   // rather than as a numerical value. It would be nice if the behavior matched
1517   // what we do to print a string literal; right now, it is impossible to tell
1518   // the difference between 'a' and L'a' in C from the JSON output.
1519   JOS.attribute("value", CL->getValue());
1520 }
1521 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1522   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1523 }
1524 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1525   llvm::SmallString<16> Buffer;
1526   FL->getValue().toString(Buffer);
1527   JOS.attribute("value", Buffer);
1528 }
1529 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1530   std::string Buffer;
1531   llvm::raw_string_ostream SS(Buffer);
1532   SL->outputString(SS);
1533   JOS.attribute("value", SS.str());
1534 }
1535 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1536   JOS.attribute("value", BLE->getValue());
1537 }
1538 
1539 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1540   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1541   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1542   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1543   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1544   attributeOnlyIfTrue("isConsteval", IS->isConsteval());
1545   attributeOnlyIfTrue("constevalIsNegated", IS->isNegatedConsteval());
1546 }
1547 
1548 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1549   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1550   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1551 }
1552 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1553   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1554 }
1555 
1556 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1557   JOS.attribute("name", LS->getName());
1558   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1559   attributeOnlyIfTrue("sideEntry", LS->isSideEntry());
1560 }
1561 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1562   JOS.attribute("targetLabelDeclId",
1563                 createPointerRepresentation(GS->getLabel()));
1564 }
1565 
1566 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1567   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1568 }
1569 
1570 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1571   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1572   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1573   // null child node and ObjC gets no child node.
1574   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1575 }
1576 
1577 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1578   JOS.attribute("isNull", true);
1579 }
1580 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1581   JOS.attribute("type", createQualType(TA.getAsType()));
1582 }
1583 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1584     const TemplateArgument &TA) {
1585   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1586 }
1587 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1588   JOS.attribute("isNullptr", true);
1589 }
1590 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1591   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1592 }
1593 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1594   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1595   // the output format.
1596 }
1597 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1598     const TemplateArgument &TA) {
1599   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1600   // the output format.
1601 }
1602 void JSONNodeDumper::VisitExpressionTemplateArgument(
1603     const TemplateArgument &TA) {
1604   JOS.attribute("isExpr", true);
1605 }
1606 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1607   JOS.attribute("isPack", true);
1608 }
1609 
1610 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1611   if (Traits)
1612     return Traits->getCommandInfo(CommandID)->Name;
1613   if (const comments::CommandInfo *Info =
1614           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1615     return Info->Name;
1616   return "<invalid>";
1617 }
1618 
1619 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1620                                       const comments::FullComment *) {
1621   JOS.attribute("text", C->getText());
1622 }
1623 
1624 void JSONNodeDumper::visitInlineCommandComment(
1625     const comments::InlineCommandComment *C, const comments::FullComment *) {
1626   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1627 
1628   switch (C->getRenderKind()) {
1629   case comments::InlineCommandComment::RenderNormal:
1630     JOS.attribute("renderKind", "normal");
1631     break;
1632   case comments::InlineCommandComment::RenderBold:
1633     JOS.attribute("renderKind", "bold");
1634     break;
1635   case comments::InlineCommandComment::RenderEmphasized:
1636     JOS.attribute("renderKind", "emphasized");
1637     break;
1638   case comments::InlineCommandComment::RenderMonospaced:
1639     JOS.attribute("renderKind", "monospaced");
1640     break;
1641   case comments::InlineCommandComment::RenderAnchor:
1642     JOS.attribute("renderKind", "anchor");
1643     break;
1644   }
1645 
1646   llvm::json::Array Args;
1647   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1648     Args.push_back(C->getArgText(I));
1649 
1650   if (!Args.empty())
1651     JOS.attribute("args", std::move(Args));
1652 }
1653 
1654 void JSONNodeDumper::visitHTMLStartTagComment(
1655     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1656   JOS.attribute("name", C->getTagName());
1657   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1658   attributeOnlyIfTrue("malformed", C->isMalformed());
1659 
1660   llvm::json::Array Attrs;
1661   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1662     Attrs.push_back(
1663         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1664 
1665   if (!Attrs.empty())
1666     JOS.attribute("attrs", std::move(Attrs));
1667 }
1668 
1669 void JSONNodeDumper::visitHTMLEndTagComment(
1670     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1671   JOS.attribute("name", C->getTagName());
1672 }
1673 
1674 void JSONNodeDumper::visitBlockCommandComment(
1675     const comments::BlockCommandComment *C, const comments::FullComment *) {
1676   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1677 
1678   llvm::json::Array Args;
1679   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1680     Args.push_back(C->getArgText(I));
1681 
1682   if (!Args.empty())
1683     JOS.attribute("args", std::move(Args));
1684 }
1685 
1686 void JSONNodeDumper::visitParamCommandComment(
1687     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1688   switch (C->getDirection()) {
1689   case comments::ParamCommandComment::In:
1690     JOS.attribute("direction", "in");
1691     break;
1692   case comments::ParamCommandComment::Out:
1693     JOS.attribute("direction", "out");
1694     break;
1695   case comments::ParamCommandComment::InOut:
1696     JOS.attribute("direction", "in,out");
1697     break;
1698   }
1699   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1700 
1701   if (C->hasParamName())
1702     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1703                                                   : C->getParamNameAsWritten());
1704 
1705   if (C->isParamIndexValid() && !C->isVarArgParam())
1706     JOS.attribute("paramIdx", C->getParamIndex());
1707 }
1708 
1709 void JSONNodeDumper::visitTParamCommandComment(
1710     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1711   if (C->hasParamName())
1712     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1713                                                 : C->getParamNameAsWritten());
1714   if (C->isPositionValid()) {
1715     llvm::json::Array Positions;
1716     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1717       Positions.push_back(C->getIndex(I));
1718 
1719     if (!Positions.empty())
1720       JOS.attribute("positions", std::move(Positions));
1721   }
1722 }
1723 
1724 void JSONNodeDumper::visitVerbatimBlockComment(
1725     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1726   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1727   JOS.attribute("closeName", C->getCloseName());
1728 }
1729 
1730 void JSONNodeDumper::visitVerbatimBlockLineComment(
1731     const comments::VerbatimBlockLineComment *C,
1732     const comments::FullComment *) {
1733   JOS.attribute("text", C->getText());
1734 }
1735 
1736 void JSONNodeDumper::visitVerbatimLineComment(
1737     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1738   JOS.attribute("text", C->getText());
1739 }
1740 
1741 llvm::json::Object JSONNodeDumper::createFPOptions(FPOptionsOverride FPO) {
1742   llvm::json::Object Ret;
1743 #define OPTION(NAME, TYPE, WIDTH, PREVIOUS)                                    \
1744   if (FPO.has##NAME##Override())                                               \
1745     Ret.try_emplace(#NAME, static_cast<unsigned>(FPO.get##NAME##Override()));
1746 #include "clang/Basic/FPOptions.def"
1747   return Ret;
1748 }
1749 
1750 void JSONNodeDumper::VisitCompoundStmt(const CompoundStmt *S) {
1751   VisitStmt(S);
1752   if (S->hasStoredFPFeatures())
1753     JOS.attribute("fpoptions", createFPOptions(S->getStoredFPFeatures()));
1754 }
1755