xref: /llvm-project/clang/lib/AST/JSONNodeDumper.cpp (revision f2d8a0ac1dd1fe55b2c3b358c525fbc01b0121ed) 
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     std::string MangledName = ASTNameGen.getName(ND);
827     if (!MangledName.empty())
828       JOS.attribute("mangledName", MangledName);
829   }
830 }
831 
832 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
833   VisitNamedDecl(TD);
834   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
835 }
836 
837 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
838   VisitNamedDecl(TAD);
839   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
840 }
841 
842 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
843   VisitNamedDecl(ND);
844   attributeOnlyIfTrue("isInline", ND->isInline());
845   attributeOnlyIfTrue("isNested", ND->isNested());
846   if (!ND->isOriginalNamespace())
847     JOS.attribute("originalNamespace",
848                   createBareDeclRef(ND->getOriginalNamespace()));
849 }
850 
851 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
852   JOS.attribute("nominatedNamespace",
853                 createBareDeclRef(UDD->getNominatedNamespace()));
854 }
855 
856 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
857   VisitNamedDecl(NAD);
858   JOS.attribute("aliasedNamespace",
859                 createBareDeclRef(NAD->getAliasedNamespace()));
860 }
861 
862 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
863   std::string Name;
864   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
865     llvm::raw_string_ostream SOS(Name);
866     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
867   }
868   Name += UD->getNameAsString();
869   JOS.attribute("name", Name);
870 }
871 
872 void JSONNodeDumper::VisitUsingEnumDecl(const UsingEnumDecl *UED) {
873   JOS.attribute("target", createBareDeclRef(UED->getEnumDecl()));
874 }
875 
876 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
877   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
878 }
879 
880 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
881   VisitNamedDecl(VD);
882   JOS.attribute("type", createQualType(VD->getType()));
883   if (const auto *P = dyn_cast<ParmVarDecl>(VD))
884     attributeOnlyIfTrue("explicitObjectParameter",
885                         P->isExplicitObjectParameter());
886 
887   StorageClass SC = VD->getStorageClass();
888   if (SC != SC_None)
889     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
890   switch (VD->getTLSKind()) {
891   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
892   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
893   case VarDecl::TLS_None: break;
894   }
895   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
896   attributeOnlyIfTrue("inline", VD->isInline());
897   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
898   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
899   if (VD->hasInit()) {
900     switch (VD->getInitStyle()) {
901     case VarDecl::CInit: JOS.attribute("init", "c");  break;
902     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
903     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
904     case VarDecl::ParenListInit:
905       JOS.attribute("init", "paren-list");
906       break;
907     }
908   }
909   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
910 }
911 
912 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
913   VisitNamedDecl(FD);
914   JOS.attribute("type", createQualType(FD->getType()));
915   attributeOnlyIfTrue("mutable", FD->isMutable());
916   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
917   attributeOnlyIfTrue("isBitfield", FD->isBitField());
918   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
919 }
920 
921 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
922   VisitNamedDecl(FD);
923   JOS.attribute("type", createQualType(FD->getType()));
924   StorageClass SC = FD->getStorageClass();
925   if (SC != SC_None)
926     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
927   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
928   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
929   attributeOnlyIfTrue("pure", FD->isPure());
930   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
931   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
932   attributeOnlyIfTrue("variadic", FD->isVariadic());
933   attributeOnlyIfTrue("immediate", FD->isImmediateFunction());
934 
935   if (FD->isDefaulted())
936     JOS.attribute("explicitlyDefaulted",
937                   FD->isDeleted() ? "deleted" : "default");
938 }
939 
940 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
941   VisitNamedDecl(ED);
942   if (ED->isFixed())
943     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
944   if (ED->isScoped())
945     JOS.attribute("scopedEnumTag",
946                   ED->isScopedUsingClassTag() ? "class" : "struct");
947 }
948 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
949   VisitNamedDecl(ECD);
950   JOS.attribute("type", createQualType(ECD->getType()));
951 }
952 
953 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
954   VisitNamedDecl(RD);
955   JOS.attribute("tagUsed", RD->getKindName());
956   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
957 }
958 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
959   VisitRecordDecl(RD);
960 
961   // All other information requires a complete definition.
962   if (!RD->isCompleteDefinition())
963     return;
964 
965   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
966   if (RD->getNumBases()) {
967     JOS.attributeArray("bases", [this, RD] {
968       for (const auto &Spec : RD->bases())
969         JOS.value(createCXXBaseSpecifier(Spec));
970     });
971   }
972 }
973 
974 void JSONNodeDumper::VisitHLSLBufferDecl(const HLSLBufferDecl *D) {
975   VisitNamedDecl(D);
976   JOS.attribute("bufferKind", D->isCBuffer() ? "cbuffer" : "tbuffer");
977 }
978 
979 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
980   VisitNamedDecl(D);
981   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
982   JOS.attribute("depth", D->getDepth());
983   JOS.attribute("index", D->getIndex());
984   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
985 
986   if (D->hasDefaultArgument())
987     JOS.attributeObject("defaultArg", [=] {
988       Visit(D->getDefaultArgument(), SourceRange(),
989             D->getDefaultArgStorage().getInheritedFrom(),
990             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
991     });
992 }
993 
994 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
995     const NonTypeTemplateParmDecl *D) {
996   VisitNamedDecl(D);
997   JOS.attribute("type", createQualType(D->getType()));
998   JOS.attribute("depth", D->getDepth());
999   JOS.attribute("index", D->getIndex());
1000   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1001 
1002   if (D->hasDefaultArgument())
1003     JOS.attributeObject("defaultArg", [=] {
1004       Visit(D->getDefaultArgument(), SourceRange(),
1005             D->getDefaultArgStorage().getInheritedFrom(),
1006             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1007     });
1008 }
1009 
1010 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
1011     const TemplateTemplateParmDecl *D) {
1012   VisitNamedDecl(D);
1013   JOS.attribute("depth", D->getDepth());
1014   JOS.attribute("index", D->getIndex());
1015   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1016 
1017   if (D->hasDefaultArgument())
1018     JOS.attributeObject("defaultArg", [=] {
1019       const auto *InheritedFrom = D->getDefaultArgStorage().getInheritedFrom();
1020       Visit(D->getDefaultArgument().getArgument(),
1021             InheritedFrom ? InheritedFrom->getSourceRange() : SourceLocation{},
1022             InheritedFrom,
1023             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1024     });
1025 }
1026 
1027 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
1028   StringRef Lang;
1029   switch (LSD->getLanguage()) {
1030   case LinkageSpecLanguageIDs::C:
1031     Lang = "C";
1032     break;
1033   case LinkageSpecLanguageIDs::CXX:
1034     Lang = "C++";
1035     break;
1036   }
1037   JOS.attribute("language", Lang);
1038   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
1039 }
1040 
1041 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
1042   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
1043 }
1044 
1045 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
1046   if (const TypeSourceInfo *T = FD->getFriendType())
1047     JOS.attribute("type", createQualType(T->getType()));
1048 }
1049 
1050 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
1051   VisitNamedDecl(D);
1052   JOS.attribute("type", createQualType(D->getType()));
1053   attributeOnlyIfTrue("synthesized", D->getSynthesize());
1054   switch (D->getAccessControl()) {
1055   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
1056   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
1057   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
1058   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
1059   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
1060   }
1061 }
1062 
1063 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
1064   VisitNamedDecl(D);
1065   JOS.attribute("returnType", createQualType(D->getReturnType()));
1066   JOS.attribute("instance", D->isInstanceMethod());
1067   attributeOnlyIfTrue("variadic", D->isVariadic());
1068 }
1069 
1070 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
1071   VisitNamedDecl(D);
1072   JOS.attribute("type", createQualType(D->getUnderlyingType()));
1073   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
1074   switch (D->getVariance()) {
1075   case ObjCTypeParamVariance::Invariant:
1076     break;
1077   case ObjCTypeParamVariance::Covariant:
1078     JOS.attribute("variance", "covariant");
1079     break;
1080   case ObjCTypeParamVariance::Contravariant:
1081     JOS.attribute("variance", "contravariant");
1082     break;
1083   }
1084 }
1085 
1086 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
1087   VisitNamedDecl(D);
1088   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1089   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1090 
1091   llvm::json::Array Protocols;
1092   for (const auto* P : D->protocols())
1093     Protocols.push_back(createBareDeclRef(P));
1094   if (!Protocols.empty())
1095     JOS.attribute("protocols", std::move(Protocols));
1096 }
1097 
1098 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
1099   VisitNamedDecl(D);
1100   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1101   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
1102 }
1103 
1104 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
1105   VisitNamedDecl(D);
1106 
1107   llvm::json::Array Protocols;
1108   for (const auto *P : D->protocols())
1109     Protocols.push_back(createBareDeclRef(P));
1110   if (!Protocols.empty())
1111     JOS.attribute("protocols", std::move(Protocols));
1112 }
1113 
1114 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
1115   VisitNamedDecl(D);
1116   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1117   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1118 
1119   llvm::json::Array Protocols;
1120   for (const auto* P : D->protocols())
1121     Protocols.push_back(createBareDeclRef(P));
1122   if (!Protocols.empty())
1123     JOS.attribute("protocols", std::move(Protocols));
1124 }
1125 
1126 void JSONNodeDumper::VisitObjCImplementationDecl(
1127     const ObjCImplementationDecl *D) {
1128   VisitNamedDecl(D);
1129   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1130   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1131 }
1132 
1133 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
1134     const ObjCCompatibleAliasDecl *D) {
1135   VisitNamedDecl(D);
1136   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1137 }
1138 
1139 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
1140   VisitNamedDecl(D);
1141   JOS.attribute("type", createQualType(D->getType()));
1142 
1143   switch (D->getPropertyImplementation()) {
1144   case ObjCPropertyDecl::None: break;
1145   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
1146   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
1147   }
1148 
1149   ObjCPropertyAttribute::Kind Attrs = D->getPropertyAttributes();
1150   if (Attrs != ObjCPropertyAttribute::kind_noattr) {
1151     if (Attrs & ObjCPropertyAttribute::kind_getter)
1152       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
1153     if (Attrs & ObjCPropertyAttribute::kind_setter)
1154       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
1155     attributeOnlyIfTrue("readonly",
1156                         Attrs & ObjCPropertyAttribute::kind_readonly);
1157     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyAttribute::kind_assign);
1158     attributeOnlyIfTrue("readwrite",
1159                         Attrs & ObjCPropertyAttribute::kind_readwrite);
1160     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyAttribute::kind_retain);
1161     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyAttribute::kind_copy);
1162     attributeOnlyIfTrue("nonatomic",
1163                         Attrs & ObjCPropertyAttribute::kind_nonatomic);
1164     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyAttribute::kind_atomic);
1165     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyAttribute::kind_weak);
1166     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyAttribute::kind_strong);
1167     attributeOnlyIfTrue("unsafe_unretained",
1168                         Attrs & ObjCPropertyAttribute::kind_unsafe_unretained);
1169     attributeOnlyIfTrue("class", Attrs & ObjCPropertyAttribute::kind_class);
1170     attributeOnlyIfTrue("direct", Attrs & ObjCPropertyAttribute::kind_direct);
1171     attributeOnlyIfTrue("nullability",
1172                         Attrs & ObjCPropertyAttribute::kind_nullability);
1173     attributeOnlyIfTrue("null_resettable",
1174                         Attrs & ObjCPropertyAttribute::kind_null_resettable);
1175   }
1176 }
1177 
1178 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
1179   VisitNamedDecl(D->getPropertyDecl());
1180   JOS.attribute("implKind", D->getPropertyImplementation() ==
1181                                     ObjCPropertyImplDecl::Synthesize
1182                                 ? "synthesize"
1183                                 : "dynamic");
1184   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
1185   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
1186 }
1187 
1188 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
1189   attributeOnlyIfTrue("variadic", D->isVariadic());
1190   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
1191 }
1192 
1193 void JSONNodeDumper::VisitAtomicExpr(const AtomicExpr *AE) {
1194   JOS.attribute("name", AE->getOpAsString());
1195 }
1196 
1197 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1198   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1199 }
1200 
1201 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1202   std::string Str;
1203   llvm::raw_string_ostream OS(Str);
1204 
1205   OME->getSelector().print(OS);
1206   JOS.attribute("selector", OS.str());
1207 
1208   switch (OME->getReceiverKind()) {
1209   case ObjCMessageExpr::Instance:
1210     JOS.attribute("receiverKind", "instance");
1211     break;
1212   case ObjCMessageExpr::Class:
1213     JOS.attribute("receiverKind", "class");
1214     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1215     break;
1216   case ObjCMessageExpr::SuperInstance:
1217     JOS.attribute("receiverKind", "super (instance)");
1218     JOS.attribute("superType", createQualType(OME->getSuperType()));
1219     break;
1220   case ObjCMessageExpr::SuperClass:
1221     JOS.attribute("receiverKind", "super (class)");
1222     JOS.attribute("superType", createQualType(OME->getSuperType()));
1223     break;
1224   }
1225 
1226   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1227   if (OME->getType() != CallReturnTy)
1228     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1229 }
1230 
1231 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1232   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1233     std::string Str;
1234     llvm::raw_string_ostream OS(Str);
1235 
1236     MD->getSelector().print(OS);
1237     JOS.attribute("selector", OS.str());
1238   }
1239 }
1240 
1241 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1242   std::string Str;
1243   llvm::raw_string_ostream OS(Str);
1244 
1245   OSE->getSelector().print(OS);
1246   JOS.attribute("selector", OS.str());
1247 }
1248 
1249 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1250   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1251 }
1252 
1253 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1254   if (OPRE->isImplicitProperty()) {
1255     JOS.attribute("propertyKind", "implicit");
1256     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1257       JOS.attribute("getter", createBareDeclRef(MD));
1258     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1259       JOS.attribute("setter", createBareDeclRef(MD));
1260   } else {
1261     JOS.attribute("propertyKind", "explicit");
1262     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1263   }
1264 
1265   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1266   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1267   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1268 }
1269 
1270 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1271     const ObjCSubscriptRefExpr *OSRE) {
1272   JOS.attribute("subscriptKind",
1273                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1274 
1275   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1276     JOS.attribute("getter", createBareDeclRef(MD));
1277   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1278     JOS.attribute("setter", createBareDeclRef(MD));
1279 }
1280 
1281 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1282   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1283   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1284   JOS.attribute("isArrow", OIRE->isArrow());
1285 }
1286 
1287 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1288   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1289 }
1290 
1291 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1292   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1293   if (DRE->getDecl() != DRE->getFoundDecl())
1294     JOS.attribute("foundReferencedDecl",
1295                   createBareDeclRef(DRE->getFoundDecl()));
1296   switch (DRE->isNonOdrUse()) {
1297   case NOUR_None: break;
1298   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1299   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1300   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1301   }
1302   attributeOnlyIfTrue("isImmediateEscalating", DRE->isImmediateEscalating());
1303 }
1304 
1305 void JSONNodeDumper::VisitSYCLUniqueStableNameExpr(
1306     const SYCLUniqueStableNameExpr *E) {
1307   JOS.attribute("typeSourceInfo",
1308                 createQualType(E->getTypeSourceInfo()->getType()));
1309 }
1310 
1311 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1312   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1313 }
1314 
1315 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1316   JOS.attribute("isPostfix", UO->isPostfix());
1317   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1318   if (!UO->canOverflow())
1319     JOS.attribute("canOverflow", false);
1320 }
1321 
1322 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1323   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1324 }
1325 
1326 void JSONNodeDumper::VisitCompoundAssignOperator(
1327     const CompoundAssignOperator *CAO) {
1328   VisitBinaryOperator(CAO);
1329   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1330   JOS.attribute("computeResultType",
1331                 createQualType(CAO->getComputationResultType()));
1332 }
1333 
1334 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1335   // Note, we always write this Boolean field because the information it conveys
1336   // is critical to understanding the AST node.
1337   ValueDecl *VD = ME->getMemberDecl();
1338   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1339   JOS.attribute("isArrow", ME->isArrow());
1340   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1341   switch (ME->isNonOdrUse()) {
1342   case NOUR_None: break;
1343   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1344   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1345   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1346   }
1347 }
1348 
1349 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1350   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1351   attributeOnlyIfTrue("isArray", NE->isArray());
1352   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1353   switch (NE->getInitializationStyle()) {
1354   case CXXNewInitializationStyle::None:
1355   case CXXNewInitializationStyle::Implicit:
1356     break;
1357   case CXXNewInitializationStyle::Call:
1358     JOS.attribute("initStyle", "call");
1359     break;
1360   case CXXNewInitializationStyle::List:
1361     JOS.attribute("initStyle", "list");
1362     break;
1363   }
1364   if (const FunctionDecl *FD = NE->getOperatorNew())
1365     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1366   if (const FunctionDecl *FD = NE->getOperatorDelete())
1367     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1368 }
1369 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1370   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1371   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1372   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1373   if (const FunctionDecl *FD = DE->getOperatorDelete())
1374     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1375 }
1376 
1377 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1378   attributeOnlyIfTrue("implicit", TE->isImplicit());
1379 }
1380 
1381 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1382   JOS.attribute("castKind", CE->getCastKindName());
1383   llvm::json::Array Path = createCastPath(CE);
1384   if (!Path.empty())
1385     JOS.attribute("path", std::move(Path));
1386   // FIXME: This may not be useful information as it can be obtusely gleaned
1387   // from the inner[] array.
1388   if (const NamedDecl *ND = CE->getConversionFunction())
1389     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1390 }
1391 
1392 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1393   VisitCastExpr(ICE);
1394   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1395 }
1396 
1397 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1398   attributeOnlyIfTrue("adl", CE->usesADL());
1399 }
1400 
1401 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1402     const UnaryExprOrTypeTraitExpr *TTE) {
1403   JOS.attribute("name", getTraitSpelling(TTE->getKind()));
1404   if (TTE->isArgumentType())
1405     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1406 }
1407 
1408 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1409   VisitNamedDecl(SOPE->getPack());
1410 }
1411 
1412 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1413     const UnresolvedLookupExpr *ULE) {
1414   JOS.attribute("usesADL", ULE->requiresADL());
1415   JOS.attribute("name", ULE->getName().getAsString());
1416 
1417   JOS.attributeArray("lookups", [this, ULE] {
1418     for (const NamedDecl *D : ULE->decls())
1419       JOS.value(createBareDeclRef(D));
1420   });
1421 }
1422 
1423 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1424   JOS.attribute("name", ALE->getLabel()->getName());
1425   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1426 }
1427 
1428 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1429   if (CTE->isTypeOperand()) {
1430     QualType Adjusted = CTE->getTypeOperand(Ctx);
1431     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1432     JOS.attribute("typeArg", createQualType(Unadjusted));
1433     if (Adjusted != Unadjusted)
1434       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1435   }
1436 }
1437 
1438 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1439   if (CE->getResultAPValueKind() != APValue::None)
1440     Visit(CE->getAPValueResult(), CE->getType());
1441 }
1442 
1443 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1444   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1445     JOS.attribute("field", createBareDeclRef(FD));
1446 }
1447 
1448 void JSONNodeDumper::VisitGenericSelectionExpr(
1449     const GenericSelectionExpr *GSE) {
1450   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1451 }
1452 
1453 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1454     const CXXUnresolvedConstructExpr *UCE) {
1455   if (UCE->getType() != UCE->getTypeAsWritten())
1456     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1457   attributeOnlyIfTrue("list", UCE->isListInitialization());
1458 }
1459 
1460 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1461   CXXConstructorDecl *Ctor = CE->getConstructor();
1462   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1463   attributeOnlyIfTrue("elidable", CE->isElidable());
1464   attributeOnlyIfTrue("list", CE->isListInitialization());
1465   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1466   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1467   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1468   attributeOnlyIfTrue("isImmediateEscalating", CE->isImmediateEscalating());
1469 
1470   switch (CE->getConstructionKind()) {
1471   case CXXConstructionKind::Complete:
1472     JOS.attribute("constructionKind", "complete");
1473     break;
1474   case CXXConstructionKind::Delegating:
1475     JOS.attribute("constructionKind", "delegating");
1476     break;
1477   case CXXConstructionKind::NonVirtualBase:
1478     JOS.attribute("constructionKind", "non-virtual base");
1479     break;
1480   case CXXConstructionKind::VirtualBase:
1481     JOS.attribute("constructionKind", "virtual base");
1482     break;
1483   }
1484 }
1485 
1486 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1487   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1488                       EWC->cleanupsHaveSideEffects());
1489   if (EWC->getNumObjects()) {
1490     JOS.attributeArray("cleanups", [this, EWC] {
1491       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1492         if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
1493           JOS.value(createBareDeclRef(BD));
1494         } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
1495           llvm::json::Object Obj;
1496           Obj["id"] = createPointerRepresentation(CLE);
1497           Obj["kind"] = CLE->getStmtClassName();
1498           JOS.value(std::move(Obj));
1499         } else {
1500           llvm_unreachable("unexpected cleanup object type");
1501         }
1502     });
1503   }
1504 }
1505 
1506 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1507     const CXXBindTemporaryExpr *BTE) {
1508   const CXXTemporary *Temp = BTE->getTemporary();
1509   JOS.attribute("temp", createPointerRepresentation(Temp));
1510   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1511     JOS.attribute("dtor", createBareDeclRef(Dtor));
1512 }
1513 
1514 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1515     const MaterializeTemporaryExpr *MTE) {
1516   if (const ValueDecl *VD = MTE->getExtendingDecl())
1517     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1518 
1519   switch (MTE->getStorageDuration()) {
1520   case SD_Automatic:
1521     JOS.attribute("storageDuration", "automatic");
1522     break;
1523   case SD_Dynamic:
1524     JOS.attribute("storageDuration", "dynamic");
1525     break;
1526   case SD_FullExpression:
1527     JOS.attribute("storageDuration", "full expression");
1528     break;
1529   case SD_Static:
1530     JOS.attribute("storageDuration", "static");
1531     break;
1532   case SD_Thread:
1533     JOS.attribute("storageDuration", "thread");
1534     break;
1535   }
1536 
1537   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1538 }
1539 
1540 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1541     const CXXDependentScopeMemberExpr *DSME) {
1542   JOS.attribute("isArrow", DSME->isArrow());
1543   JOS.attribute("member", DSME->getMember().getAsString());
1544   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1545   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1546                       DSME->hasExplicitTemplateArgs());
1547 
1548   if (DSME->getNumTemplateArgs()) {
1549     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1550       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1551         JOS.object(
1552             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1553     });
1554   }
1555 }
1556 
1557 void JSONNodeDumper::VisitRequiresExpr(const RequiresExpr *RE) {
1558   if (!RE->isValueDependent())
1559     JOS.attribute("satisfied", RE->isSatisfied());
1560 }
1561 
1562 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1563   llvm::SmallString<16> Buffer;
1564   IL->getValue().toString(Buffer,
1565                           /*Radix=*/10, IL->getType()->isSignedIntegerType());
1566   JOS.attribute("value", Buffer);
1567 }
1568 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1569   // FIXME: This should probably print the character literal as a string,
1570   // rather than as a numerical value. It would be nice if the behavior matched
1571   // what we do to print a string literal; right now, it is impossible to tell
1572   // the difference between 'a' and L'a' in C from the JSON output.
1573   JOS.attribute("value", CL->getValue());
1574 }
1575 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1576   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1577 }
1578 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1579   llvm::SmallString<16> Buffer;
1580   FL->getValue().toString(Buffer);
1581   JOS.attribute("value", Buffer);
1582 }
1583 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1584   std::string Buffer;
1585   llvm::raw_string_ostream SS(Buffer);
1586   SL->outputString(SS);
1587   JOS.attribute("value", SS.str());
1588 }
1589 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1590   JOS.attribute("value", BLE->getValue());
1591 }
1592 
1593 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1594   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1595   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1596   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1597   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1598   attributeOnlyIfTrue("isConsteval", IS->isConsteval());
1599   attributeOnlyIfTrue("constevalIsNegated", IS->isNegatedConsteval());
1600 }
1601 
1602 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1603   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1604   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1605 }
1606 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1607   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1608 }
1609 
1610 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1611   JOS.attribute("name", LS->getName());
1612   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1613   attributeOnlyIfTrue("sideEntry", LS->isSideEntry());
1614 }
1615 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1616   JOS.attribute("targetLabelDeclId",
1617                 createPointerRepresentation(GS->getLabel()));
1618 }
1619 
1620 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1621   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1622 }
1623 
1624 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1625   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1626   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1627   // null child node and ObjC gets no child node.
1628   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1629 }
1630 
1631 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1632   JOS.attribute("isNull", true);
1633 }
1634 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1635   JOS.attribute("type", createQualType(TA.getAsType()));
1636 }
1637 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1638     const TemplateArgument &TA) {
1639   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1640 }
1641 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1642   JOS.attribute("isNullptr", true);
1643 }
1644 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1645   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1646 }
1647 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1648   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1649   // the output format.
1650 }
1651 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1652     const TemplateArgument &TA) {
1653   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1654   // the output format.
1655 }
1656 void JSONNodeDumper::VisitExpressionTemplateArgument(
1657     const TemplateArgument &TA) {
1658   JOS.attribute("isExpr", true);
1659 }
1660 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1661   JOS.attribute("isPack", true);
1662 }
1663 
1664 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1665   if (Traits)
1666     return Traits->getCommandInfo(CommandID)->Name;
1667   if (const comments::CommandInfo *Info =
1668           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1669     return Info->Name;
1670   return "<invalid>";
1671 }
1672 
1673 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1674                                       const comments::FullComment *) {
1675   JOS.attribute("text", C->getText());
1676 }
1677 
1678 void JSONNodeDumper::visitInlineCommandComment(
1679     const comments::InlineCommandComment *C, const comments::FullComment *) {
1680   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1681 
1682   switch (C->getRenderKind()) {
1683   case comments::InlineCommandRenderKind::Normal:
1684     JOS.attribute("renderKind", "normal");
1685     break;
1686   case comments::InlineCommandRenderKind::Bold:
1687     JOS.attribute("renderKind", "bold");
1688     break;
1689   case comments::InlineCommandRenderKind::Emphasized:
1690     JOS.attribute("renderKind", "emphasized");
1691     break;
1692   case comments::InlineCommandRenderKind::Monospaced:
1693     JOS.attribute("renderKind", "monospaced");
1694     break;
1695   case comments::InlineCommandRenderKind::Anchor:
1696     JOS.attribute("renderKind", "anchor");
1697     break;
1698   }
1699 
1700   llvm::json::Array Args;
1701   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1702     Args.push_back(C->getArgText(I));
1703 
1704   if (!Args.empty())
1705     JOS.attribute("args", std::move(Args));
1706 }
1707 
1708 void JSONNodeDumper::visitHTMLStartTagComment(
1709     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1710   JOS.attribute("name", C->getTagName());
1711   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1712   attributeOnlyIfTrue("malformed", C->isMalformed());
1713 
1714   llvm::json::Array Attrs;
1715   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1716     Attrs.push_back(
1717         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1718 
1719   if (!Attrs.empty())
1720     JOS.attribute("attrs", std::move(Attrs));
1721 }
1722 
1723 void JSONNodeDumper::visitHTMLEndTagComment(
1724     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1725   JOS.attribute("name", C->getTagName());
1726 }
1727 
1728 void JSONNodeDumper::visitBlockCommandComment(
1729     const comments::BlockCommandComment *C, const comments::FullComment *) {
1730   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1731 
1732   llvm::json::Array Args;
1733   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1734     Args.push_back(C->getArgText(I));
1735 
1736   if (!Args.empty())
1737     JOS.attribute("args", std::move(Args));
1738 }
1739 
1740 void JSONNodeDumper::visitParamCommandComment(
1741     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1742   switch (C->getDirection()) {
1743   case comments::ParamCommandPassDirection::In:
1744     JOS.attribute("direction", "in");
1745     break;
1746   case comments::ParamCommandPassDirection::Out:
1747     JOS.attribute("direction", "out");
1748     break;
1749   case comments::ParamCommandPassDirection::InOut:
1750     JOS.attribute("direction", "in,out");
1751     break;
1752   }
1753   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1754 
1755   if (C->hasParamName())
1756     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1757                                                   : C->getParamNameAsWritten());
1758 
1759   if (C->isParamIndexValid() && !C->isVarArgParam())
1760     JOS.attribute("paramIdx", C->getParamIndex());
1761 }
1762 
1763 void JSONNodeDumper::visitTParamCommandComment(
1764     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1765   if (C->hasParamName())
1766     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1767                                                 : C->getParamNameAsWritten());
1768   if (C->isPositionValid()) {
1769     llvm::json::Array Positions;
1770     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1771       Positions.push_back(C->getIndex(I));
1772 
1773     if (!Positions.empty())
1774       JOS.attribute("positions", std::move(Positions));
1775   }
1776 }
1777 
1778 void JSONNodeDumper::visitVerbatimBlockComment(
1779     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1780   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1781   JOS.attribute("closeName", C->getCloseName());
1782 }
1783 
1784 void JSONNodeDumper::visitVerbatimBlockLineComment(
1785     const comments::VerbatimBlockLineComment *C,
1786     const comments::FullComment *) {
1787   JOS.attribute("text", C->getText());
1788 }
1789 
1790 void JSONNodeDumper::visitVerbatimLineComment(
1791     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1792   JOS.attribute("text", C->getText());
1793 }
1794 
1795 llvm::json::Object JSONNodeDumper::createFPOptions(FPOptionsOverride FPO) {
1796   llvm::json::Object Ret;
1797 #define OPTION(NAME, TYPE, WIDTH, PREVIOUS)                                    \
1798   if (FPO.has##NAME##Override())                                               \
1799     Ret.try_emplace(#NAME, static_cast<unsigned>(FPO.get##NAME##Override()));
1800 #include "clang/Basic/FPOptions.def"
1801   return Ret;
1802 }
1803 
1804 void JSONNodeDumper::VisitCompoundStmt(const CompoundStmt *S) {
1805   VisitStmt(S);
1806   if (S->hasStoredFPFeatures())
1807     JOS.attribute("fpoptions", createFPOptions(S->getStoredFPFeatures()));
1808 }
1809