clang/lib/AST/JSONNodeDumper.cpp

   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 CXXNewExpr::NoInit: break;
1355   case CXXNewExpr::CallInit: JOS.attribute("initStyle", "call"); break;
1356   case CXXNewExpr::ListInit: JOS.attribute("initStyle", "list"); break;
1357   }
1358   if (const FunctionDecl *FD = NE->getOperatorNew())
1359     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1360   if (const FunctionDecl *FD = NE->getOperatorDelete())
1361     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1362 }
1363 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1364   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1365   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1366   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1367   if (const FunctionDecl *FD = DE->getOperatorDelete())
1368     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1369 }
1370
1371 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1372   attributeOnlyIfTrue("implicit", TE->isImplicit());
1373 }
1374
1375 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1376   JOS.attribute("castKind", CE->getCastKindName());
1377   llvm::json::Array Path = createCastPath(CE);
1378   if (!Path.empty())
1379     JOS.attribute("path", std::move(Path));
1380   // FIXME: This may not be useful information as it can be obtusely gleaned
1381   // from the inner[] array.
1382   if (const NamedDecl *ND = CE->getConversionFunction())
1383     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1384 }
1385
1386 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1387   VisitCastExpr(ICE);
1388   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1389 }
1390
1391 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1392   attributeOnlyIfTrue("adl", CE->usesADL());
1393 }
1394
1395 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1396     const UnaryExprOrTypeTraitExpr *TTE) {
1397   JOS.attribute("name", getTraitSpelling(TTE->getKind()));
1398   if (TTE->isArgumentType())
1399     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1400 }
1401
1402 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1403   VisitNamedDecl(SOPE->getPack());
1404 }
1405
1406 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1407     const UnresolvedLookupExpr *ULE) {
1408   JOS.attribute("usesADL", ULE->requiresADL());
1409   JOS.attribute("name", ULE->getName().getAsString());
1410
1411   JOS.attributeArray("lookups", [this, ULE] {
1412     for (const NamedDecl *D : ULE->decls())
1413       JOS.value(createBareDeclRef(D));
1414   });
1415 }
1416
1417 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1418   JOS.attribute("name", ALE->getLabel()->getName());
1419   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1420 }
1421
1422 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1423   if (CTE->isTypeOperand()) {
1424     QualType Adjusted = CTE->getTypeOperand(Ctx);
1425     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1426     JOS.attribute("typeArg", createQualType(Unadjusted));
1427     if (Adjusted != Unadjusted)
1428       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1429   }
1430 }
1431
1432 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1433   if (CE->getResultAPValueKind() != APValue::None)
1434     Visit(CE->getAPValueResult(), CE->getType());
1435 }
1436
1437 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1438   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1439     JOS.attribute("field", createBareDeclRef(FD));
1440 }
1441
1442 void JSONNodeDumper::VisitGenericSelectionExpr(
1443     const GenericSelectionExpr *GSE) {
1444   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1445 }
1446
1447 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1448     const CXXUnresolvedConstructExpr *UCE) {
1449   if (UCE->getType() != UCE->getTypeAsWritten())
1450     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1451   attributeOnlyIfTrue("list", UCE->isListInitialization());
1452 }
1453
1454 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1455   CXXConstructorDecl *Ctor = CE->getConstructor();
1456   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1457   attributeOnlyIfTrue("elidable", CE->isElidable());
1458   attributeOnlyIfTrue("list", CE->isListInitialization());
1459   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1460   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1461   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1462   attributeOnlyIfTrue("isImmediateEscalating", CE->isImmediateEscalating());
1463
1464   switch (CE->getConstructionKind()) {
1465   case CXXConstructExpr::CK_Complete:
1466     JOS.attribute("constructionKind", "complete");
1467     break;
1468   case CXXConstructExpr::CK_Delegating:
1469     JOS.attribute("constructionKind", "delegating");
1470     break;
1471   case CXXConstructExpr::CK_NonVirtualBase:
1472     JOS.attribute("constructionKind", "non-virtual base");
1473     break;
1474   case CXXConstructExpr::CK_VirtualBase:
1475     JOS.attribute("constructionKind", "virtual base");
1476     break;
1477   }
1478 }
1479
1480 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1481   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1482                       EWC->cleanupsHaveSideEffects());
1483   if (EWC->getNumObjects()) {
1484     JOS.attributeArray("cleanups", [this, EWC] {
1485       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1486         if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
1487           JOS.value(createBareDeclRef(BD));
1488         } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
1489           llvm::json::Object Obj;
1490           Obj["id"] = createPointerRepresentation(CLE);
1491           Obj["kind"] = CLE->getStmtClassName();
1492           JOS.value(std::move(Obj));
1493         } else {
1494           llvm_unreachable("unexpected cleanup object type");
1495         }
1496     });
1497   }
1498 }
1499
1500 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1501     const CXXBindTemporaryExpr *BTE) {
1502   const CXXTemporary *Temp = BTE->getTemporary();
1503   JOS.attribute("temp", createPointerRepresentation(Temp));
1504   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1505     JOS.attribute("dtor", createBareDeclRef(Dtor));
1506 }
1507
1508 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1509     const MaterializeTemporaryExpr *MTE) {
1510   if (const ValueDecl *VD = MTE->getExtendingDecl())
1511     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1512
1513   switch (MTE->getStorageDuration()) {
1514   case SD_Automatic:
1515     JOS.attribute("storageDuration", "automatic");
1516     break;
1517   case SD_Dynamic:
1518     JOS.attribute("storageDuration", "dynamic");
1519     break;
1520   case SD_FullExpression:
1521     JOS.attribute("storageDuration", "full expression");
1522     break;
1523   case SD_Static:
1524     JOS.attribute("storageDuration", "static");
1525     break;
1526   case SD_Thread:
1527     JOS.attribute("storageDuration", "thread");
1528     break;
1529   }
1530
1531   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1532 }
1533
1534 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1535     const CXXDependentScopeMemberExpr *DSME) {
1536   JOS.attribute("isArrow", DSME->isArrow());
1537   JOS.attribute("member", DSME->getMember().getAsString());
1538   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1539   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1540                       DSME->hasExplicitTemplateArgs());
1541
1542   if (DSME->getNumTemplateArgs()) {
1543     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1544       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1545         JOS.object(
1546             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1547     });
1548   }
1549 }
1550
1551 void JSONNodeDumper::VisitRequiresExpr(const RequiresExpr *RE) {
1552   if (!RE->isValueDependent())
1553     JOS.attribute("satisfied", RE->isSatisfied());
1554 }
1555
1556 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1557   llvm::SmallString<16> Buffer;
1558   IL->getValue().toString(Buffer,
1559                           /*Radix=*/10, IL->getType()->isSignedIntegerType());
1560   JOS.attribute("value", Buffer);
1561 }
1562 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1563   // FIXME: This should probably print the character literal as a string,
1564   // rather than as a numerical value. It would be nice if the behavior matched
1565   // what we do to print a string literal; right now, it is impossible to tell
1566   // the difference between 'a' and L'a' in C from the JSON output.
1567   JOS.attribute("value", CL->getValue());
1568 }
1569 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1570   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1571 }
1572 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1573   llvm::SmallString<16> Buffer;
1574   FL->getValue().toString(Buffer);
1575   JOS.attribute("value", Buffer);
1576 }
1577 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1578   std::string Buffer;
1579   llvm::raw_string_ostream SS(Buffer);
1580   SL->outputString(SS);
1581   JOS.attribute("value", SS.str());
1582 }
1583 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1584   JOS.attribute("value", BLE->getValue());
1585 }
1586
1587 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1588   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1589   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1590   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1591   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1592   attributeOnlyIfTrue("isConsteval", IS->isConsteval());
1593   attributeOnlyIfTrue("constevalIsNegated", IS->isNegatedConsteval());
1594 }
1595
1596 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1597   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1598   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1599 }
1600 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1601   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1602 }
1603
1604 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1605   JOS.attribute("name", LS->getName());
1606   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1607   attributeOnlyIfTrue("sideEntry", LS->isSideEntry());
1608 }
1609 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1610   JOS.attribute("targetLabelDeclId",
1611                 createPointerRepresentation(GS->getLabel()));
1612 }
1613
1614 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1615   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1616 }
1617
1618 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1619   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1620   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1621   // null child node and ObjC gets no child node.
1622   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1623 }
1624
1625 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1626   JOS.attribute("isNull", true);
1627 }
1628 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1629   JOS.attribute("type", createQualType(TA.getAsType()));
1630 }
1631 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1632     const TemplateArgument &TA) {
1633   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1634 }
1635 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1636   JOS.attribute("isNullptr", true);
1637 }
1638 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1639   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1640 }
1641 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1642   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1643   // the output format.
1644 }
1645 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1646     const TemplateArgument &TA) {
1647   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1648   // the output format.
1649 }
1650 void JSONNodeDumper::VisitExpressionTemplateArgument(
1651     const TemplateArgument &TA) {
1652   JOS.attribute("isExpr", true);
1653 }
1654 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1655   JOS.attribute("isPack", true);
1656 }
1657
1658 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1659   if (Traits)
1660     return Traits->getCommandInfo(CommandID)->Name;
1661   if (const comments::CommandInfo *Info =
1662           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1663     return Info->Name;
1664   return "<invalid>";
1665 }
1666
1667 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1668                                       const comments::FullComment *) {
1669   JOS.attribute("text", C->getText());
1670 }
1671
1672 void JSONNodeDumper::visitInlineCommandComment(
1673     const comments::InlineCommandComment *C, const comments::FullComment *) {
1674   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1675
1676   switch (C->getRenderKind()) {
1677   case comments::InlineCommandComment::RenderNormal:
1678     JOS.attribute("renderKind", "normal");
1679     break;
1680   case comments::InlineCommandComment::RenderBold:
1681     JOS.attribute("renderKind", "bold");
1682     break;
1683   case comments::InlineCommandComment::RenderEmphasized:
1684     JOS.attribute("renderKind", "emphasized");
1685     break;
1686   case comments::InlineCommandComment::RenderMonospaced:
1687     JOS.attribute("renderKind", "monospaced");
1688     break;
1689   case comments::InlineCommandComment::RenderAnchor:
1690     JOS.attribute("renderKind", "anchor");
1691     break;
1692   }
1693
1694   llvm::json::Array Args;
1695   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1696     Args.push_back(C->getArgText(I));
1697
1698   if (!Args.empty())
1699     JOS.attribute("args", std::move(Args));
1700 }
1701
1702 void JSONNodeDumper::visitHTMLStartTagComment(
1703     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1704   JOS.attribute("name", C->getTagName());
1705   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1706   attributeOnlyIfTrue("malformed", C->isMalformed());
1707
1708   llvm::json::Array Attrs;
1709   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1710     Attrs.push_back(
1711         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1712
1713   if (!Attrs.empty())
1714     JOS.attribute("attrs", std::move(Attrs));
1715 }
1716
1717 void JSONNodeDumper::visitHTMLEndTagComment(
1718     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1719   JOS.attribute("name", C->getTagName());
1720 }
1721
1722 void JSONNodeDumper::visitBlockCommandComment(
1723     const comments::BlockCommandComment *C, const comments::FullComment *) {
1724   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1725
1726   llvm::json::Array Args;
1727   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1728     Args.push_back(C->getArgText(I));
1729
1730   if (!Args.empty())
1731     JOS.attribute("args", std::move(Args));
1732 }
1733
1734 void JSONNodeDumper::visitParamCommandComment(
1735     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1736   switch (C->getDirection()) {
1737   case comments::ParamCommandComment::In:
1738     JOS.attribute("direction", "in");
1739     break;
1740   case comments::ParamCommandComment::Out:
1741     JOS.attribute("direction", "out");
1742     break;
1743   case comments::ParamCommandComment::InOut:
1744     JOS.attribute("direction", "in,out");
1745     break;
1746   }
1747   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1748
1749   if (C->hasParamName())
1750     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1751                                                   : C->getParamNameAsWritten());
1752
1753   if (C->isParamIndexValid() && !C->isVarArgParam())
1754     JOS.attribute("paramIdx", C->getParamIndex());
1755 }
1756
1757 void JSONNodeDumper::visitTParamCommandComment(
1758     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1759   if (C->hasParamName())
1760     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1761                                                 : C->getParamNameAsWritten());
1762   if (C->isPositionValid()) {
1763     llvm::json::Array Positions;
1764     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1765       Positions.push_back(C->getIndex(I));
1766
1767     if (!Positions.empty())
1768       JOS.attribute("positions", std::move(Positions));
1769   }
1770 }
1771
1772 void JSONNodeDumper::visitVerbatimBlockComment(
1773     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1774   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1775   JOS.attribute("closeName", C->getCloseName());
1776 }
1777
1778 void JSONNodeDumper::visitVerbatimBlockLineComment(
1779     const comments::VerbatimBlockLineComment *C,
1780     const comments::FullComment *) {
1781   JOS.attribute("text", C->getText());
1782 }
1783
1784 void JSONNodeDumper::visitVerbatimLineComment(
1785     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1786   JOS.attribute("text", C->getText());
1787 }
1788
1789 llvm::json::Object JSONNodeDumper::createFPOptions(FPOptionsOverride FPO) {
1790   llvm::json::Object Ret;
1791 #define OPTION(NAME, TYPE, WIDTH, PREVIOUS)                                    \
1792   if (FPO.has##NAME##Override())                                               \
1793     Ret.try_emplace(#NAME, static_cast<unsigned>(FPO.get##NAME##Override()));
1794 #include "clang/Basic/FPOptions.def"
1795   return Ret;
1796 }
1797
1798 void JSONNodeDumper::VisitCompoundStmt(const CompoundStmt *S) {
1799   VisitStmt(S);
1800   if (S->hasStoredFPFeatures())
1801     JOS.attribute("fpoptions", createFPOptions(S->getStoredFPFeatures()));
1802 }