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(TypeLoc TL) {
 100   if (TL.isNull())
 101     return;
 102   JOS.attribute("kind",
 103                 (llvm::Twine(TL.getTypeLocClass() == TypeLoc::Qualified
 104                                  ? "Qualified"
 105                                  : TL.getTypePtr()->getTypeClassName()) +
 106                  "TypeLoc")
 107                     .str());
 108   JOS.attribute("type",
 109                 createQualType(QualType(TL.getType()), /*Desugar=*/false));
 110   JOS.attributeObject("range",
 111                       [TL, this] { writeSourceRange(TL.getSourceRange()); });
 112 }
 113
 114 void JSONNodeDumper::Visit(const Decl *D) {
 115   JOS.attribute("id", createPointerRepresentation(D));
 116
 117   if (!D)
 118     return;
 119
 120   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
 121   JOS.attributeObject("loc",
 122                       [D, this] { writeSourceLocation(D->getLocation()); });
 123   JOS.attributeObject("range",
 124                       [D, this] { writeSourceRange(D->getSourceRange()); });
 125   attributeOnlyIfTrue("isImplicit", D->isImplicit());
 126   attributeOnlyIfTrue("isInvalid", D->isInvalidDecl());
 127
 128   if (D->isUsed())
 129     JOS.attribute("isUsed", true);
 130   else if (D->isThisDeclarationReferenced())
 131     JOS.attribute("isReferenced", true);
 132
 133   if (const auto *ND = dyn_cast<NamedDecl>(D))
 134     attributeOnlyIfTrue("isHidden", !ND->isUnconditionallyVisible());
 135
 136   if (D->getLexicalDeclContext() != D->getDeclContext()) {
 137     // Because of multiple inheritance, a DeclContext pointer does not produce
 138     // the same pointer representation as a Decl pointer that references the
 139     // same AST Node.
 140     const auto *ParentDeclContextDecl = dyn_cast<Decl>(D->getDeclContext());
 141     JOS.attribute("parentDeclContextId",
 142                   createPointerRepresentation(ParentDeclContextDecl));
 143   }
 144
 145   addPreviousDeclaration(D);
 146   InnerDeclVisitor::Visit(D);
 147 }
 148
 149 void JSONNodeDumper::Visit(const comments::Comment *C,
 150                            const comments::FullComment *FC) {
 151   if (!C)
 152     return;
 153
 154   JOS.attribute("id", createPointerRepresentation(C));
 155   JOS.attribute("kind", C->getCommentKindName());
 156   JOS.attributeObject("loc",
 157                       [C, this] { writeSourceLocation(C->getLocation()); });
 158   JOS.attributeObject("range",
 159                       [C, this] { writeSourceRange(C->getSourceRange()); });
 160
 161   InnerCommentVisitor::visit(C, FC);
 162 }
 163
 164 void JSONNodeDumper::Visit(const TemplateArgument &TA, SourceRange R,
 165                            const Decl *From, StringRef Label) {
 166   JOS.attribute("kind", "TemplateArgument");
 167   if (R.isValid())
 168     JOS.attributeObject("range", [R, this] { writeSourceRange(R); });
 169
 170   if (From)
 171     JOS.attribute(Label.empty() ? "fromDecl" : Label, createBareDeclRef(From));
 172
 173   InnerTemplateArgVisitor::Visit(TA);
 174 }
 175
 176 void JSONNodeDumper::Visit(const CXXCtorInitializer *Init) {
 177   JOS.attribute("kind", "CXXCtorInitializer");
 178   if (Init->isAnyMemberInitializer())
 179     JOS.attribute("anyInit", createBareDeclRef(Init->getAnyMember()));
 180   else if (Init->isBaseInitializer())
 181     JOS.attribute("baseInit",
 182                   createQualType(QualType(Init->getBaseClass(), 0)));
 183   else if (Init->isDelegatingInitializer())
 184     JOS.attribute("delegatingInit",
 185                   createQualType(Init->getTypeSourceInfo()->getType()));
 186   else
 187     llvm_unreachable("Unknown initializer type");
 188 }
 189
 190 void JSONNodeDumper::Visit(const OpenACCClause *C) {}
 191
 192 void JSONNodeDumper::Visit(const OMPClause *C) {}
 193
 194 void JSONNodeDumper::Visit(const BlockDecl::Capture &C) {
 195   JOS.attribute("kind", "Capture");
 196   attributeOnlyIfTrue("byref", C.isByRef());
 197   attributeOnlyIfTrue("nested", C.isNested());
 198   if (C.getVariable())
 199     JOS.attribute("var", createBareDeclRef(C.getVariable()));
 200 }
 201
 202 void JSONNodeDumper::Visit(const GenericSelectionExpr::ConstAssociation &A) {
 203   JOS.attribute("associationKind", A.getTypeSourceInfo() ? "case" : "default");
 204   attributeOnlyIfTrue("selected", A.isSelected());
 205 }
 206
 207 void JSONNodeDumper::Visit(const concepts::Requirement *R) {
 208   if (!R)
 209     return;
 210
 211   switch (R->getKind()) {
 212   case concepts::Requirement::RK_Type:
 213     JOS.attribute("kind", "TypeRequirement");
 214     break;
 215   case concepts::Requirement::RK_Simple:
 216     JOS.attribute("kind", "SimpleRequirement");
 217     break;
 218   case concepts::Requirement::RK_Compound:
 219     JOS.attribute("kind", "CompoundRequirement");
 220     break;
 221   case concepts::Requirement::RK_Nested:
 222     JOS.attribute("kind", "NestedRequirement");
 223     break;
 224   }
 225
 226   if (auto *ER = dyn_cast<concepts::ExprRequirement>(R))
 227     attributeOnlyIfTrue("noexcept", ER->hasNoexceptRequirement());
 228
 229   attributeOnlyIfTrue("isDependent", R->isDependent());
 230   if (!R->isDependent())
 231     JOS.attribute("satisfied", R->isSatisfied());
 232   attributeOnlyIfTrue("containsUnexpandedPack",
 233                       R->containsUnexpandedParameterPack());
 234 }
 235
 236 void JSONNodeDumper::Visit(const APValue &Value, QualType Ty) {
 237   std::string Str;
 238   llvm::raw_string_ostream OS(Str);
 239   Value.printPretty(OS, Ctx, Ty);
 240   JOS.attribute("value", Str);
 241 }
 242
 243 void JSONNodeDumper::Visit(const ConceptReference *CR) {
 244   JOS.attribute("kind", "ConceptReference");
 245   JOS.attribute("id", createPointerRepresentation(CR->getNamedConcept()));
 246   if (const auto *Args = CR->getTemplateArgsAsWritten()) {
 247     JOS.attributeArray("templateArgsAsWritten", [Args, this] {
 248       for (const TemplateArgumentLoc &TAL : Args->arguments())
 249         JOS.object(
 250             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
 251     });
 252   }
 253   JOS.attributeObject("loc",
 254                       [CR, this] { writeSourceLocation(CR->getLocation()); });
 255   JOS.attributeObject("range",
 256                       [CR, this] { writeSourceRange(CR->getSourceRange()); });
 257 }
 258
 259 void JSONNodeDumper::writeIncludeStack(PresumedLoc Loc, bool JustFirst) {
 260   if (Loc.isInvalid())
 261     return;
 262
 263   JOS.attributeBegin("includedFrom");
 264   JOS.objectBegin();
 265
 266   if (!JustFirst) {
 267     // Walk the stack recursively, then print out the presumed location.
 268     writeIncludeStack(SM.getPresumedLoc(Loc.getIncludeLoc()));
 269   }
 270
 271   JOS.attribute("file", Loc.getFilename());
 272   JOS.objectEnd();
 273   JOS.attributeEnd();
 274 }
 275
 276 void JSONNodeDumper::writeBareSourceLocation(SourceLocation Loc,
 277                                              bool IsSpelling) {
 278   PresumedLoc Presumed = SM.getPresumedLoc(Loc);
 279   unsigned ActualLine = IsSpelling ? SM.getSpellingLineNumber(Loc)
 280                                    : SM.getExpansionLineNumber(Loc);
 281   StringRef ActualFile = SM.getBufferName(Loc);
 282
 283   if (Presumed.isValid()) {
 284     JOS.attribute("offset", SM.getDecomposedLoc(Loc).second);
 285     if (LastLocFilename != ActualFile) {
 286       JOS.attribute("file", ActualFile);
 287       JOS.attribute("line", ActualLine);
 288     } else if (LastLocLine != ActualLine)
 289       JOS.attribute("line", ActualLine);
 290
 291     StringRef PresumedFile = Presumed.getFilename();
 292     if (PresumedFile != ActualFile && LastLocPresumedFilename != PresumedFile)
 293       JOS.attribute("presumedFile", PresumedFile);
 294
 295     unsigned PresumedLine = Presumed.getLine();
 296     if (ActualLine != PresumedLine && LastLocPresumedLine != PresumedLine)
 297       JOS.attribute("presumedLine", PresumedLine);
 298
 299     JOS.attribute("col", Presumed.getColumn());
 300     JOS.attribute("tokLen",
 301                   Lexer::MeasureTokenLength(Loc, SM, Ctx.getLangOpts()));
 302     LastLocFilename = ActualFile;
 303     LastLocPresumedFilename = PresumedFile;
 304     LastLocPresumedLine = PresumedLine;
 305     LastLocLine = ActualLine;
 306
 307     // Orthogonal to the file, line, and column de-duplication is whether the
 308     // given location was a result of an include. If so, print where the
 309     // include location came from.
 310     writeIncludeStack(SM.getPresumedLoc(Presumed.getIncludeLoc()),
 311                       /*JustFirst*/ true);
 312   }
 313 }
 314
 315 void JSONNodeDumper::writeSourceLocation(SourceLocation Loc) {
 316   SourceLocation Spelling = SM.getSpellingLoc(Loc);
 317   SourceLocation Expansion = SM.getExpansionLoc(Loc);
 318
 319   if (Expansion != Spelling) {
 320     // If the expansion and the spelling are different, output subobjects
 321     // describing both locations.
 322     JOS.attributeObject("spellingLoc", [Spelling, this] {
 323       writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
 324     });
 325     JOS.attributeObject("expansionLoc", [Expansion, Loc, this] {
 326       writeBareSourceLocation(Expansion, /*IsSpelling*/ false);
 327       // If there is a macro expansion, add extra information if the interesting
 328       // bit is the macro arg expansion.
 329       if (SM.isMacroArgExpansion(Loc))
 330         JOS.attribute("isMacroArgExpansion", true);
 331     });
 332   } else
 333     writeBareSourceLocation(Spelling, /*IsSpelling*/ true);
 334 }
 335
 336 void JSONNodeDumper::writeSourceRange(SourceRange R) {
 337   JOS.attributeObject("begin",
 338                       [R, this] { writeSourceLocation(R.getBegin()); });
 339   JOS.attributeObject("end", [R, this] { writeSourceLocation(R.getEnd()); });
 340 }
 341
 342 std::string JSONNodeDumper::createPointerRepresentation(const void *Ptr) {
 343   // Because JSON stores integer values as signed 64-bit integers, trying to
 344   // represent them as such makes for very ugly pointer values in the resulting
 345   // output. Instead, we convert the value to hex and treat it as a string.
 346   return "0x" + llvm::utohexstr(reinterpret_cast<uint64_t>(Ptr), true);
 347 }
 348
 349 llvm::json::Object JSONNodeDumper::createQualType(QualType QT, bool Desugar) {
 350   SplitQualType SQT = QT.split();
 351   std::string SQTS = QualType::getAsString(SQT, PrintPolicy);
 352   llvm::json::Object Ret{{"qualType", SQTS}};
 353
 354   if (Desugar && !QT.isNull()) {
 355     SplitQualType DSQT = QT.getSplitDesugaredType();
 356     if (DSQT != SQT) {
 357       std::string DSQTS = QualType::getAsString(DSQT, PrintPolicy);
 358       if (DSQTS != SQTS)
 359         Ret["desugaredQualType"] = DSQTS;
 360     }
 361     if (const auto *TT = QT->getAs<TypedefType>())
 362       Ret["typeAliasDeclId"] = createPointerRepresentation(TT->getDecl());
 363   }
 364   return Ret;
 365 }
 366
 367 void JSONNodeDumper::writeBareDeclRef(const Decl *D) {
 368   JOS.attribute("id", createPointerRepresentation(D));
 369   if (!D)
 370     return;
 371
 372   JOS.attribute("kind", (llvm::Twine(D->getDeclKindName()) + "Decl").str());
 373   if (const auto *ND = dyn_cast<NamedDecl>(D))
 374     JOS.attribute("name", ND->getDeclName().getAsString());
 375   if (const auto *VD = dyn_cast<ValueDecl>(D))
 376     JOS.attribute("type", createQualType(VD->getType()));
 377 }
 378
 379 llvm::json::Object JSONNodeDumper::createBareDeclRef(const Decl *D) {
 380   llvm::json::Object Ret{{"id", createPointerRepresentation(D)}};
 381   if (!D)
 382     return Ret;
 383
 384   Ret["kind"] = (llvm::Twine(D->getDeclKindName()) + "Decl").str();
 385   if (const auto *ND = dyn_cast<NamedDecl>(D))
 386     Ret["name"] = ND->getDeclName().getAsString();
 387   if (const auto *VD = dyn_cast<ValueDecl>(D))
 388     Ret["type"] = createQualType(VD->getType());
 389   return Ret;
 390 }
 391
 392 llvm::json::Array JSONNodeDumper::createCastPath(const CastExpr *C) {
 393   llvm::json::Array Ret;
 394   if (C->path_empty())
 395     return Ret;
 396
 397   for (auto I = C->path_begin(), E = C->path_end(); I != E; ++I) {
 398     const CXXBaseSpecifier *Base = *I;
 399     const auto *RD =
 400         cast<CXXRecordDecl>(Base->getType()->castAs<RecordType>()->getDecl());
 401
 402     llvm::json::Object Val{{"name", RD->getName()}};
 403     if (Base->isVirtual())
 404       Val["isVirtual"] = true;
 405     Ret.push_back(std::move(Val));
 406   }
 407   return Ret;
 408 }
 409
 410 #define FIELD2(Name, Flag)  if (RD->Flag()) Ret[Name] = true
 411 #define FIELD1(Flag)        FIELD2(#Flag, Flag)
 412
 413 static llvm::json::Object
 414 createDefaultConstructorDefinitionData(const CXXRecordDecl *RD) {
 415   llvm::json::Object Ret;
 416
 417   FIELD2("exists", hasDefaultConstructor);
 418   FIELD2("trivial", hasTrivialDefaultConstructor);
 419   FIELD2("nonTrivial", hasNonTrivialDefaultConstructor);
 420   FIELD2("userProvided", hasUserProvidedDefaultConstructor);
 421   FIELD2("isConstexpr", hasConstexprDefaultConstructor);
 422   FIELD2("needsImplicit", needsImplicitDefaultConstructor);
 423   FIELD2("defaultedIsConstexpr", defaultedDefaultConstructorIsConstexpr);
 424
 425   return Ret;
 426 }
 427
 428 static llvm::json::Object
 429 createCopyConstructorDefinitionData(const CXXRecordDecl *RD) {
 430   llvm::json::Object Ret;
 431
 432   FIELD2("simple", hasSimpleCopyConstructor);
 433   FIELD2("trivial", hasTrivialCopyConstructor);
 434   FIELD2("nonTrivial", hasNonTrivialCopyConstructor);
 435   FIELD2("userDeclared", hasUserDeclaredCopyConstructor);
 436   FIELD2("hasConstParam", hasCopyConstructorWithConstParam);
 437   FIELD2("implicitHasConstParam", implicitCopyConstructorHasConstParam);
 438   FIELD2("needsImplicit", needsImplicitCopyConstructor);
 439   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyConstructor);
 440   if (!RD->needsOverloadResolutionForCopyConstructor())
 441     FIELD2("defaultedIsDeleted", defaultedCopyConstructorIsDeleted);
 442
 443   return Ret;
 444 }
 445
 446 static llvm::json::Object
 447 createMoveConstructorDefinitionData(const CXXRecordDecl *RD) {
 448   llvm::json::Object Ret;
 449
 450   FIELD2("exists", hasMoveConstructor);
 451   FIELD2("simple", hasSimpleMoveConstructor);
 452   FIELD2("trivial", hasTrivialMoveConstructor);
 453   FIELD2("nonTrivial", hasNonTrivialMoveConstructor);
 454   FIELD2("userDeclared", hasUserDeclaredMoveConstructor);
 455   FIELD2("needsImplicit", needsImplicitMoveConstructor);
 456   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveConstructor);
 457   if (!RD->needsOverloadResolutionForMoveConstructor())
 458     FIELD2("defaultedIsDeleted", defaultedMoveConstructorIsDeleted);
 459
 460   return Ret;
 461 }
 462
 463 static llvm::json::Object
 464 createCopyAssignmentDefinitionData(const CXXRecordDecl *RD) {
 465   llvm::json::Object Ret;
 466
 467   FIELD2("simple", hasSimpleCopyAssignment);
 468   FIELD2("trivial", hasTrivialCopyAssignment);
 469   FIELD2("nonTrivial", hasNonTrivialCopyAssignment);
 470   FIELD2("hasConstParam", hasCopyAssignmentWithConstParam);
 471   FIELD2("implicitHasConstParam", implicitCopyAssignmentHasConstParam);
 472   FIELD2("userDeclared", hasUserDeclaredCopyAssignment);
 473   FIELD2("needsImplicit", needsImplicitCopyAssignment);
 474   FIELD2("needsOverloadResolution", needsOverloadResolutionForCopyAssignment);
 475
 476   return Ret;
 477 }
 478
 479 static llvm::json::Object
 480 createMoveAssignmentDefinitionData(const CXXRecordDecl *RD) {
 481   llvm::json::Object Ret;
 482
 483   FIELD2("exists", hasMoveAssignment);
 484   FIELD2("simple", hasSimpleMoveAssignment);
 485   FIELD2("trivial", hasTrivialMoveAssignment);
 486   FIELD2("nonTrivial", hasNonTrivialMoveAssignment);
 487   FIELD2("userDeclared", hasUserDeclaredMoveAssignment);
 488   FIELD2("needsImplicit", needsImplicitMoveAssignment);
 489   FIELD2("needsOverloadResolution", needsOverloadResolutionForMoveAssignment);
 490
 491   return Ret;
 492 }
 493
 494 static llvm::json::Object
 495 createDestructorDefinitionData(const CXXRecordDecl *RD) {
 496   llvm::json::Object Ret;
 497
 498   FIELD2("simple", hasSimpleDestructor);
 499   FIELD2("irrelevant", hasIrrelevantDestructor);
 500   FIELD2("trivial", hasTrivialDestructor);
 501   FIELD2("nonTrivial", hasNonTrivialDestructor);
 502   FIELD2("userDeclared", hasUserDeclaredDestructor);
 503   FIELD2("needsImplicit", needsImplicitDestructor);
 504   FIELD2("needsOverloadResolution", needsOverloadResolutionForDestructor);
 505   if (!RD->needsOverloadResolutionForDestructor())
 506     FIELD2("defaultedIsDeleted", defaultedDestructorIsDeleted);
 507
 508   return Ret;
 509 }
 510
 511 llvm::json::Object
 512 JSONNodeDumper::createCXXRecordDefinitionData(const CXXRecordDecl *RD) {
 513   llvm::json::Object Ret;
 514
 515   // This data is common to all C++ classes.
 516   FIELD1(isGenericLambda);
 517   FIELD1(isLambda);
 518   FIELD1(isEmpty);
 519   FIELD1(isAggregate);
 520   FIELD1(isStandardLayout);
 521   FIELD1(isTriviallyCopyable);
 522   FIELD1(isPOD);
 523   FIELD1(isTrivial);
 524   FIELD1(isPolymorphic);
 525   FIELD1(isAbstract);
 526   FIELD1(isLiteral);
 527   FIELD1(canPassInRegisters);
 528   FIELD1(hasUserDeclaredConstructor);
 529   FIELD1(hasConstexprNonCopyMoveConstructor);
 530   FIELD1(hasMutableFields);
 531   FIELD1(hasVariantMembers);
 532   FIELD2("canConstDefaultInit", allowConstDefaultInit);
 533
 534   Ret["defaultCtor"] = createDefaultConstructorDefinitionData(RD);
 535   Ret["copyCtor"] = createCopyConstructorDefinitionData(RD);
 536   Ret["moveCtor"] = createMoveConstructorDefinitionData(RD);
 537   Ret["copyAssign"] = createCopyAssignmentDefinitionData(RD);
 538   Ret["moveAssign"] = createMoveAssignmentDefinitionData(RD);
 539   Ret["dtor"] = createDestructorDefinitionData(RD);
 540
 541   return Ret;
 542 }
 543
 544 #undef FIELD1
 545 #undef FIELD2
 546
 547 std::string JSONNodeDumper::createAccessSpecifier(AccessSpecifier AS) {
 548   const auto AccessSpelling = getAccessSpelling(AS);
 549   if (AccessSpelling.empty())
 550     return "none";
 551   return AccessSpelling.str();
 552 }
 553
 554 llvm::json::Object
 555 JSONNodeDumper::createCXXBaseSpecifier(const CXXBaseSpecifier &BS) {
 556   llvm::json::Object Ret;
 557
 558   Ret["type"] = createQualType(BS.getType());
 559   Ret["access"] = createAccessSpecifier(BS.getAccessSpecifier());
 560   Ret["writtenAccess"] =
 561       createAccessSpecifier(BS.getAccessSpecifierAsWritten());
 562   if (BS.isVirtual())
 563     Ret["isVirtual"] = true;
 564   if (BS.isPackExpansion())
 565     Ret["isPackExpansion"] = true;
 566
 567   return Ret;
 568 }
 569
 570 void JSONNodeDumper::VisitAliasAttr(const AliasAttr *AA) {
 571   JOS.attribute("aliasee", AA->getAliasee());
 572 }
 573
 574 void JSONNodeDumper::VisitCleanupAttr(const CleanupAttr *CA) {
 575   JOS.attribute("cleanup_function", createBareDeclRef(CA->getFunctionDecl()));
 576 }
 577
 578 void JSONNodeDumper::VisitDeprecatedAttr(const DeprecatedAttr *DA) {
 579   if (!DA->getMessage().empty())
 580     JOS.attribute("message", DA->getMessage());
 581   if (!DA->getReplacement().empty())
 582     JOS.attribute("replacement", DA->getReplacement());
 583 }
 584
 585 void JSONNodeDumper::VisitUnavailableAttr(const UnavailableAttr *UA) {
 586   if (!UA->getMessage().empty())
 587     JOS.attribute("message", UA->getMessage());
 588 }
 589
 590 void JSONNodeDumper::VisitSectionAttr(const SectionAttr *SA) {
 591   JOS.attribute("section_name", SA->getName());
 592 }
 593
 594 void JSONNodeDumper::VisitVisibilityAttr(const VisibilityAttr *VA) {
 595   JOS.attribute("visibility", VisibilityAttr::ConvertVisibilityTypeToStr(
 596                                   VA->getVisibility()));
 597 }
 598
 599 void JSONNodeDumper::VisitTLSModelAttr(const TLSModelAttr *TA) {
 600   JOS.attribute("tls_model", TA->getModel());
 601 }
 602
 603 void JSONNodeDumper::VisitTypedefType(const TypedefType *TT) {
 604   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
 605   if (!TT->typeMatchesDecl())
 606     JOS.attribute("type", createQualType(TT->desugar()));
 607 }
 608
 609 void JSONNodeDumper::VisitUsingType(const UsingType *TT) {
 610   JOS.attribute("decl", createBareDeclRef(TT->getFoundDecl()));
 611   if (!TT->typeMatchesDecl())
 612     JOS.attribute("type", createQualType(TT->desugar()));
 613 }
 614
 615 void JSONNodeDumper::VisitFunctionType(const FunctionType *T) {
 616   FunctionType::ExtInfo E = T->getExtInfo();
 617   attributeOnlyIfTrue("noreturn", E.getNoReturn());
 618   attributeOnlyIfTrue("producesResult", E.getProducesResult());
 619   if (E.getHasRegParm())
 620     JOS.attribute("regParm", E.getRegParm());
 621   JOS.attribute("cc", FunctionType::getNameForCallConv(E.getCC()));
 622 }
 623
 624 void JSONNodeDumper::VisitFunctionProtoType(const FunctionProtoType *T) {
 625   FunctionProtoType::ExtProtoInfo E = T->getExtProtoInfo();
 626   attributeOnlyIfTrue("trailingReturn", E.HasTrailingReturn);
 627   attributeOnlyIfTrue("const", T->isConst());
 628   attributeOnlyIfTrue("volatile", T->isVolatile());
 629   attributeOnlyIfTrue("restrict", T->isRestrict());
 630   attributeOnlyIfTrue("variadic", E.Variadic);
 631   switch (E.RefQualifier) {
 632   case RQ_LValue: JOS.attribute("refQualifier", "&"); break;
 633   case RQ_RValue: JOS.attribute("refQualifier", "&&"); break;
 634   case RQ_None: break;
 635   }
 636   switch (E.ExceptionSpec.Type) {
 637   case EST_DynamicNone:
 638   case EST_Dynamic: {
 639     JOS.attribute("exceptionSpec", "throw");
 640     llvm::json::Array Types;
 641     for (QualType QT : E.ExceptionSpec.Exceptions)
 642       Types.push_back(createQualType(QT));
 643     JOS.attribute("exceptionTypes", std::move(Types));
 644   } break;
 645   case EST_MSAny:
 646     JOS.attribute("exceptionSpec", "throw");
 647     JOS.attribute("throwsAny", true);
 648     break;
 649   case EST_BasicNoexcept:
 650     JOS.attribute("exceptionSpec", "noexcept");
 651     break;
 652   case EST_NoexceptTrue:
 653   case EST_NoexceptFalse:
 654     JOS.attribute("exceptionSpec", "noexcept");
 655     JOS.attribute("conditionEvaluatesTo",
 656                 E.ExceptionSpec.Type == EST_NoexceptTrue);
 657     //JOS.attributeWithCall("exceptionSpecExpr",
 658     //                    [this, E]() { Visit(E.ExceptionSpec.NoexceptExpr); });
 659     break;
 660   case EST_NoThrow:
 661     JOS.attribute("exceptionSpec", "nothrow");
 662     break;
 663   // FIXME: I cannot find a way to trigger these cases while dumping the AST. I
 664   // suspect you can only run into them when executing an AST dump from within
 665   // the debugger, which is not a use case we worry about for the JSON dumping
 666   // feature.
 667   case EST_DependentNoexcept:
 668   case EST_Unevaluated:
 669   case EST_Uninstantiated:
 670   case EST_Unparsed:
 671   case EST_None: break;
 672   }
 673   VisitFunctionType(T);
 674 }
 675
 676 void JSONNodeDumper::VisitRValueReferenceType(const ReferenceType *RT) {
 677   attributeOnlyIfTrue("spelledAsLValue", RT->isSpelledAsLValue());
 678 }
 679
 680 void JSONNodeDumper::VisitArrayType(const ArrayType *AT) {
 681   switch (AT->getSizeModifier()) {
 682   case ArraySizeModifier::Star:
 683     JOS.attribute("sizeModifier", "*");
 684     break;
 685   case ArraySizeModifier::Static:
 686     JOS.attribute("sizeModifier", "static");
 687     break;
 688   case ArraySizeModifier::Normal:
 689     break;
 690   }
 691
 692   std::string Str = AT->getIndexTypeQualifiers().getAsString();
 693   if (!Str.empty())
 694     JOS.attribute("indexTypeQualifiers", Str);
 695 }
 696
 697 void JSONNodeDumper::VisitConstantArrayType(const ConstantArrayType *CAT) {
 698   // FIXME: this should use ZExt instead of SExt, but JSON doesn't allow a
 699   // narrowing conversion to int64_t so it cannot be expressed.
 700   JOS.attribute("size", CAT->getSExtSize());
 701   VisitArrayType(CAT);
 702 }
 703
 704 void JSONNodeDumper::VisitDependentSizedExtVectorType(
 705     const DependentSizedExtVectorType *VT) {
 706   JOS.attributeObject(
 707       "attrLoc", [VT, this] { writeSourceLocation(VT->getAttributeLoc()); });
 708 }
 709
 710 void JSONNodeDumper::VisitVectorType(const VectorType *VT) {
 711   JOS.attribute("numElements", VT->getNumElements());
 712   switch (VT->getVectorKind()) {
 713   case VectorKind::Generic:
 714     break;
 715   case VectorKind::AltiVecVector:
 716     JOS.attribute("vectorKind", "altivec");
 717     break;
 718   case VectorKind::AltiVecPixel:
 719     JOS.attribute("vectorKind", "altivec pixel");
 720     break;
 721   case VectorKind::AltiVecBool:
 722     JOS.attribute("vectorKind", "altivec bool");
 723     break;
 724   case VectorKind::Neon:
 725     JOS.attribute("vectorKind", "neon");
 726     break;
 727   case VectorKind::NeonPoly:
 728     JOS.attribute("vectorKind", "neon poly");
 729     break;
 730   case VectorKind::SveFixedLengthData:
 731     JOS.attribute("vectorKind", "fixed-length sve data vector");
 732     break;
 733   case VectorKind::SveFixedLengthPredicate:
 734     JOS.attribute("vectorKind", "fixed-length sve predicate vector");
 735     break;
 736   case VectorKind::RVVFixedLengthData:
 737     JOS.attribute("vectorKind", "fixed-length rvv data vector");
 738     break;
 739   case VectorKind::RVVFixedLengthMask:
 740   case VectorKind::RVVFixedLengthMask_1:
 741   case VectorKind::RVVFixedLengthMask_2:
 742   case VectorKind::RVVFixedLengthMask_4:
 743     JOS.attribute("vectorKind", "fixed-length rvv mask vector");
 744     break;
 745   }
 746 }
 747
 748 void JSONNodeDumper::VisitUnresolvedUsingType(const UnresolvedUsingType *UUT) {
 749   JOS.attribute("decl", createBareDeclRef(UUT->getDecl()));
 750 }
 751
 752 void JSONNodeDumper::VisitUnaryTransformType(const UnaryTransformType *UTT) {
 753   switch (UTT->getUTTKind()) {
 754 #define TRANSFORM_TYPE_TRAIT_DEF(Enum, Trait)                                  \
 755   case UnaryTransformType::Enum:                                               \
 756     JOS.attribute("transformKind", #Trait);                                    \
 757     break;
 758 #include "clang/Basic/TransformTypeTraits.def"
 759   }
 760 }
 761
 762 void JSONNodeDumper::VisitTagType(const TagType *TT) {
 763   JOS.attribute("decl", createBareDeclRef(TT->getDecl()));
 764 }
 765
 766 void JSONNodeDumper::VisitTemplateTypeParmType(
 767     const TemplateTypeParmType *TTPT) {
 768   JOS.attribute("depth", TTPT->getDepth());
 769   JOS.attribute("index", TTPT->getIndex());
 770   attributeOnlyIfTrue("isPack", TTPT->isParameterPack());
 771   JOS.attribute("decl", createBareDeclRef(TTPT->getDecl()));
 772 }
 773
 774 void JSONNodeDumper::VisitSubstTemplateTypeParmType(
 775     const SubstTemplateTypeParmType *STTPT) {
 776   JOS.attribute("index", STTPT->getIndex());
 777   if (auto PackIndex = STTPT->getPackIndex())
 778     JOS.attribute("pack_index", *PackIndex);
 779 }
 780
 781 void JSONNodeDumper::VisitSubstTemplateTypeParmPackType(
 782     const SubstTemplateTypeParmPackType *T) {
 783   JOS.attribute("index", T->getIndex());
 784 }
 785
 786 void JSONNodeDumper::VisitAutoType(const AutoType *AT) {
 787   JOS.attribute("undeduced", !AT->isDeduced());
 788   switch (AT->getKeyword()) {
 789   case AutoTypeKeyword::Auto:
 790     JOS.attribute("typeKeyword", "auto");
 791     break;
 792   case AutoTypeKeyword::DecltypeAuto:
 793     JOS.attribute("typeKeyword", "decltype(auto)");
 794     break;
 795   case AutoTypeKeyword::GNUAutoType:
 796     JOS.attribute("typeKeyword", "__auto_type");
 797     break;
 798   }
 799 }
 800
 801 void JSONNodeDumper::VisitTemplateSpecializationType(
 802     const TemplateSpecializationType *TST) {
 803   attributeOnlyIfTrue("isAlias", TST->isTypeAlias());
 804
 805   std::string Str;
 806   llvm::raw_string_ostream OS(Str);
 807   TST->getTemplateName().print(OS, PrintPolicy);
 808   JOS.attribute("templateName", Str);
 809 }
 810
 811 void JSONNodeDumper::VisitInjectedClassNameType(
 812     const InjectedClassNameType *ICNT) {
 813   JOS.attribute("decl", createBareDeclRef(ICNT->getDecl()));
 814 }
 815
 816 void JSONNodeDumper::VisitObjCInterfaceType(const ObjCInterfaceType *OIT) {
 817   JOS.attribute("decl", createBareDeclRef(OIT->getDecl()));
 818 }
 819
 820 void JSONNodeDumper::VisitPackExpansionType(const PackExpansionType *PET) {
 821   if (std::optional<unsigned> N = PET->getNumExpansions())
 822     JOS.attribute("numExpansions", *N);
 823 }
 824
 825 void JSONNodeDumper::VisitElaboratedType(const ElaboratedType *ET) {
 826   if (const NestedNameSpecifier *NNS = ET->getQualifier()) {
 827     std::string Str;
 828     llvm::raw_string_ostream OS(Str);
 829     NNS->print(OS, PrintPolicy, /*ResolveTemplateArgs*/ true);
 830     JOS.attribute("qualifier", Str);
 831   }
 832   if (const TagDecl *TD = ET->getOwnedTagDecl())
 833     JOS.attribute("ownedTagDecl", createBareDeclRef(TD));
 834 }
 835
 836 void JSONNodeDumper::VisitMacroQualifiedType(const MacroQualifiedType *MQT) {
 837   JOS.attribute("macroName", MQT->getMacroIdentifier()->getName());
 838 }
 839
 840 void JSONNodeDumper::VisitMemberPointerType(const MemberPointerType *MPT) {
 841   attributeOnlyIfTrue("isData", MPT->isMemberDataPointer());
 842   attributeOnlyIfTrue("isFunction", MPT->isMemberFunctionPointer());
 843 }
 844
 845 void JSONNodeDumper::VisitNamedDecl(const NamedDecl *ND) {
 846   if (ND && ND->getDeclName()) {
 847     JOS.attribute("name", ND->getNameAsString());
 848     // FIXME: There are likely other contexts in which it makes no sense to ask
 849     // for a mangled name.
 850     if (isa<RequiresExprBodyDecl>(ND->getDeclContext()))
 851       return;
 852
 853     // If the declaration is dependent or is in a dependent context, then the
 854     // mangling is unlikely to be meaningful (and in some cases may cause
 855     // "don't know how to mangle this" assertion failures.
 856     if (ND->isTemplated())
 857       return;
 858
 859     // Mangled names are not meaningful for locals, and may not be well-defined
 860     // in the case of VLAs.
 861     auto *VD = dyn_cast<VarDecl>(ND);
 862     if (VD && VD->hasLocalStorage())
 863       return;
 864
 865     // Do not mangle template deduction guides.
 866     if (isa<CXXDeductionGuideDecl>(ND))
 867       return;
 868
 869     std::string MangledName = ASTNameGen.getName(ND);
 870     if (!MangledName.empty())
 871       JOS.attribute("mangledName", MangledName);
 872   }
 873 }
 874
 875 void JSONNodeDumper::VisitTypedefDecl(const TypedefDecl *TD) {
 876   VisitNamedDecl(TD);
 877   JOS.attribute("type", createQualType(TD->getUnderlyingType()));
 878 }
 879
 880 void JSONNodeDumper::VisitTypeAliasDecl(const TypeAliasDecl *TAD) {
 881   VisitNamedDecl(TAD);
 882   JOS.attribute("type", createQualType(TAD->getUnderlyingType()));
 883 }
 884
 885 void JSONNodeDumper::VisitNamespaceDecl(const NamespaceDecl *ND) {
 886   VisitNamedDecl(ND);
 887   attributeOnlyIfTrue("isInline", ND->isInline());
 888   attributeOnlyIfTrue("isNested", ND->isNested());
 889   if (!ND->isFirstDecl())
 890     JOS.attribute("originalNamespace", createBareDeclRef(ND->getFirstDecl()));
 891 }
 892
 893 void JSONNodeDumper::VisitUsingDirectiveDecl(const UsingDirectiveDecl *UDD) {
 894   JOS.attribute("nominatedNamespace",
 895                 createBareDeclRef(UDD->getNominatedNamespace()));
 896 }
 897
 898 void JSONNodeDumper::VisitNamespaceAliasDecl(const NamespaceAliasDecl *NAD) {
 899   VisitNamedDecl(NAD);
 900   JOS.attribute("aliasedNamespace",
 901                 createBareDeclRef(NAD->getAliasedNamespace()));
 902 }
 903
 904 void JSONNodeDumper::VisitUsingDecl(const UsingDecl *UD) {
 905   std::string Name;
 906   if (const NestedNameSpecifier *NNS = UD->getQualifier()) {
 907     llvm::raw_string_ostream SOS(Name);
 908     NNS->print(SOS, UD->getASTContext().getPrintingPolicy());
 909   }
 910   Name += UD->getNameAsString();
 911   JOS.attribute("name", Name);
 912 }
 913
 914 void JSONNodeDumper::VisitUsingEnumDecl(const UsingEnumDecl *UED) {
 915   JOS.attribute("target", createBareDeclRef(UED->getEnumDecl()));
 916 }
 917
 918 void JSONNodeDumper::VisitUsingShadowDecl(const UsingShadowDecl *USD) {
 919   JOS.attribute("target", createBareDeclRef(USD->getTargetDecl()));
 920 }
 921
 922 void JSONNodeDumper::VisitVarDecl(const VarDecl *VD) {
 923   VisitNamedDecl(VD);
 924   JOS.attribute("type", createQualType(VD->getType()));
 925   if (const auto *P = dyn_cast<ParmVarDecl>(VD))
 926     attributeOnlyIfTrue("explicitObjectParameter",
 927                         P->isExplicitObjectParameter());
 928
 929   StorageClass SC = VD->getStorageClass();
 930   if (SC != SC_None)
 931     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
 932   switch (VD->getTLSKind()) {
 933   case VarDecl::TLS_Dynamic: JOS.attribute("tls", "dynamic"); break;
 934   case VarDecl::TLS_Static: JOS.attribute("tls", "static"); break;
 935   case VarDecl::TLS_None: break;
 936   }
 937   attributeOnlyIfTrue("nrvo", VD->isNRVOVariable());
 938   attributeOnlyIfTrue("inline", VD->isInline());
 939   attributeOnlyIfTrue("constexpr", VD->isConstexpr());
 940   attributeOnlyIfTrue("modulePrivate", VD->isModulePrivate());
 941   if (VD->hasInit()) {
 942     switch (VD->getInitStyle()) {
 943     case VarDecl::CInit: JOS.attribute("init", "c");  break;
 944     case VarDecl::CallInit: JOS.attribute("init", "call"); break;
 945     case VarDecl::ListInit: JOS.attribute("init", "list"); break;
 946     case VarDecl::ParenListInit:
 947       JOS.attribute("init", "paren-list");
 948       break;
 949     }
 950   }
 951   attributeOnlyIfTrue("isParameterPack", VD->isParameterPack());
 952 }
 953
 954 void JSONNodeDumper::VisitFieldDecl(const FieldDecl *FD) {
 955   VisitNamedDecl(FD);
 956   JOS.attribute("type", createQualType(FD->getType()));
 957   attributeOnlyIfTrue("mutable", FD->isMutable());
 958   attributeOnlyIfTrue("modulePrivate", FD->isModulePrivate());
 959   attributeOnlyIfTrue("isBitfield", FD->isBitField());
 960   attributeOnlyIfTrue("hasInClassInitializer", FD->hasInClassInitializer());
 961 }
 962
 963 void JSONNodeDumper::VisitFunctionDecl(const FunctionDecl *FD) {
 964   VisitNamedDecl(FD);
 965   JOS.attribute("type", createQualType(FD->getType()));
 966   StorageClass SC = FD->getStorageClass();
 967   if (SC != SC_None)
 968     JOS.attribute("storageClass", VarDecl::getStorageClassSpecifierString(SC));
 969   attributeOnlyIfTrue("inline", FD->isInlineSpecified());
 970   attributeOnlyIfTrue("virtual", FD->isVirtualAsWritten());
 971   attributeOnlyIfTrue("pure", FD->isPureVirtual());
 972   attributeOnlyIfTrue("explicitlyDeleted", FD->isDeletedAsWritten());
 973   attributeOnlyIfTrue("constexpr", FD->isConstexpr());
 974   attributeOnlyIfTrue("variadic", FD->isVariadic());
 975   attributeOnlyIfTrue("immediate", FD->isImmediateFunction());
 976
 977   if (FD->isDefaulted())
 978     JOS.attribute("explicitlyDefaulted",
 979                   FD->isDeleted() ? "deleted" : "default");
 980
 981   if (StringLiteral *Msg = FD->getDeletedMessage())
 982     JOS.attribute("deletedMessage", Msg->getString());
 983 }
 984
 985 void JSONNodeDumper::VisitEnumDecl(const EnumDecl *ED) {
 986   VisitNamedDecl(ED);
 987   if (ED->isFixed())
 988     JOS.attribute("fixedUnderlyingType", createQualType(ED->getIntegerType()));
 989   if (ED->isScoped())
 990     JOS.attribute("scopedEnumTag",
 991                   ED->isScopedUsingClassTag() ? "class" : "struct");
 992 }
 993 void JSONNodeDumper::VisitEnumConstantDecl(const EnumConstantDecl *ECD) {
 994   VisitNamedDecl(ECD);
 995   JOS.attribute("type", createQualType(ECD->getType()));
 996 }
 997
 998 void JSONNodeDumper::VisitRecordDecl(const RecordDecl *RD) {
 999   VisitNamedDecl(RD);
1000   JOS.attribute("tagUsed", RD->getKindName());
1001   attributeOnlyIfTrue("completeDefinition", RD->isCompleteDefinition());
1002 }
1003 void JSONNodeDumper::VisitCXXRecordDecl(const CXXRecordDecl *RD) {
1004   VisitRecordDecl(RD);
1005
1006   // All other information requires a complete definition.
1007   if (!RD->isCompleteDefinition())
1008     return;
1009
1010   JOS.attribute("definitionData", createCXXRecordDefinitionData(RD));
1011   if (RD->getNumBases()) {
1012     JOS.attributeArray("bases", [this, RD] {
1013       for (const auto &Spec : RD->bases())
1014         JOS.value(createCXXBaseSpecifier(Spec));
1015     });
1016   }
1017 }
1018
1019 void JSONNodeDumper::VisitHLSLBufferDecl(const HLSLBufferDecl *D) {
1020   VisitNamedDecl(D);
1021   JOS.attribute("bufferKind", D->isCBuffer() ? "cbuffer" : "tbuffer");
1022 }
1023
1024 void JSONNodeDumper::VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
1025   VisitNamedDecl(D);
1026   JOS.attribute("tagUsed", D->wasDeclaredWithTypename() ? "typename" : "class");
1027   JOS.attribute("depth", D->getDepth());
1028   JOS.attribute("index", D->getIndex());
1029   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1030
1031   if (D->hasDefaultArgument())
1032     JOS.attributeObject("defaultArg", [=] {
1033       Visit(D->getDefaultArgument().getArgument(), SourceRange(),
1034             D->getDefaultArgStorage().getInheritedFrom(),
1035             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1036     });
1037 }
1038
1039 void JSONNodeDumper::VisitNonTypeTemplateParmDecl(
1040     const NonTypeTemplateParmDecl *D) {
1041   VisitNamedDecl(D);
1042   JOS.attribute("type", createQualType(D->getType()));
1043   JOS.attribute("depth", D->getDepth());
1044   JOS.attribute("index", D->getIndex());
1045   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1046
1047   if (D->hasDefaultArgument())
1048     JOS.attributeObject("defaultArg", [=] {
1049       Visit(D->getDefaultArgument().getArgument(), SourceRange(),
1050             D->getDefaultArgStorage().getInheritedFrom(),
1051             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1052     });
1053 }
1054
1055 void JSONNodeDumper::VisitTemplateTemplateParmDecl(
1056     const TemplateTemplateParmDecl *D) {
1057   VisitNamedDecl(D);
1058   JOS.attribute("depth", D->getDepth());
1059   JOS.attribute("index", D->getIndex());
1060   attributeOnlyIfTrue("isParameterPack", D->isParameterPack());
1061
1062   if (D->hasDefaultArgument())
1063     JOS.attributeObject("defaultArg", [=] {
1064       const auto *InheritedFrom = D->getDefaultArgStorage().getInheritedFrom();
1065       Visit(D->getDefaultArgument().getArgument(),
1066             InheritedFrom ? InheritedFrom->getSourceRange() : SourceLocation{},
1067             InheritedFrom,
1068             D->defaultArgumentWasInherited() ? "inherited from" : "previous");
1069     });
1070 }
1071
1072 void JSONNodeDumper::VisitLinkageSpecDecl(const LinkageSpecDecl *LSD) {
1073   StringRef Lang;
1074   switch (LSD->getLanguage()) {
1075   case LinkageSpecLanguageIDs::C:
1076     Lang = "C";
1077     break;
1078   case LinkageSpecLanguageIDs::CXX:
1079     Lang = "C++";
1080     break;
1081   }
1082   JOS.attribute("language", Lang);
1083   attributeOnlyIfTrue("hasBraces", LSD->hasBraces());
1084 }
1085
1086 void JSONNodeDumper::VisitAccessSpecDecl(const AccessSpecDecl *ASD) {
1087   JOS.attribute("access", createAccessSpecifier(ASD->getAccess()));
1088 }
1089
1090 void JSONNodeDumper::VisitFriendDecl(const FriendDecl *FD) {
1091   if (const TypeSourceInfo *T = FD->getFriendType())
1092     JOS.attribute("type", createQualType(T->getType()));
1093   attributeOnlyIfTrue("isPackExpansion", FD->isPackExpansion());
1094 }
1095
1096 void JSONNodeDumper::VisitObjCIvarDecl(const ObjCIvarDecl *D) {
1097   VisitNamedDecl(D);
1098   JOS.attribute("type", createQualType(D->getType()));
1099   attributeOnlyIfTrue("synthesized", D->getSynthesize());
1100   switch (D->getAccessControl()) {
1101   case ObjCIvarDecl::None: JOS.attribute("access", "none"); break;
1102   case ObjCIvarDecl::Private: JOS.attribute("access", "private"); break;
1103   case ObjCIvarDecl::Protected: JOS.attribute("access", "protected"); break;
1104   case ObjCIvarDecl::Public: JOS.attribute("access", "public"); break;
1105   case ObjCIvarDecl::Package: JOS.attribute("access", "package"); break;
1106   }
1107 }
1108
1109 void JSONNodeDumper::VisitObjCMethodDecl(const ObjCMethodDecl *D) {
1110   VisitNamedDecl(D);
1111   JOS.attribute("returnType", createQualType(D->getReturnType()));
1112   JOS.attribute("instance", D->isInstanceMethod());
1113   attributeOnlyIfTrue("variadic", D->isVariadic());
1114 }
1115
1116 void JSONNodeDumper::VisitObjCTypeParamDecl(const ObjCTypeParamDecl *D) {
1117   VisitNamedDecl(D);
1118   JOS.attribute("type", createQualType(D->getUnderlyingType()));
1119   attributeOnlyIfTrue("bounded", D->hasExplicitBound());
1120   switch (D->getVariance()) {
1121   case ObjCTypeParamVariance::Invariant:
1122     break;
1123   case ObjCTypeParamVariance::Covariant:
1124     JOS.attribute("variance", "covariant");
1125     break;
1126   case ObjCTypeParamVariance::Contravariant:
1127     JOS.attribute("variance", "contravariant");
1128     break;
1129   }
1130 }
1131
1132 void JSONNodeDumper::VisitObjCCategoryDecl(const ObjCCategoryDecl *D) {
1133   VisitNamedDecl(D);
1134   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1135   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1136
1137   llvm::json::Array Protocols;
1138   for (const auto* P : D->protocols())
1139     Protocols.push_back(createBareDeclRef(P));
1140   if (!Protocols.empty())
1141     JOS.attribute("protocols", std::move(Protocols));
1142 }
1143
1144 void JSONNodeDumper::VisitObjCCategoryImplDecl(const ObjCCategoryImplDecl *D) {
1145   VisitNamedDecl(D);
1146   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1147   JOS.attribute("categoryDecl", createBareDeclRef(D->getCategoryDecl()));
1148 }
1149
1150 void JSONNodeDumper::VisitObjCProtocolDecl(const ObjCProtocolDecl *D) {
1151   VisitNamedDecl(D);
1152
1153   llvm::json::Array Protocols;
1154   for (const auto *P : D->protocols())
1155     Protocols.push_back(createBareDeclRef(P));
1156   if (!Protocols.empty())
1157     JOS.attribute("protocols", std::move(Protocols));
1158 }
1159
1160 void JSONNodeDumper::VisitObjCInterfaceDecl(const ObjCInterfaceDecl *D) {
1161   VisitNamedDecl(D);
1162   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1163   JOS.attribute("implementation", createBareDeclRef(D->getImplementation()));
1164
1165   llvm::json::Array Protocols;
1166   for (const auto* P : D->protocols())
1167     Protocols.push_back(createBareDeclRef(P));
1168   if (!Protocols.empty())
1169     JOS.attribute("protocols", std::move(Protocols));
1170 }
1171
1172 void JSONNodeDumper::VisitObjCImplementationDecl(
1173     const ObjCImplementationDecl *D) {
1174   VisitNamedDecl(D);
1175   JOS.attribute("super", createBareDeclRef(D->getSuperClass()));
1176   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1177 }
1178
1179 void JSONNodeDumper::VisitObjCCompatibleAliasDecl(
1180     const ObjCCompatibleAliasDecl *D) {
1181   VisitNamedDecl(D);
1182   JOS.attribute("interface", createBareDeclRef(D->getClassInterface()));
1183 }
1184
1185 void JSONNodeDumper::VisitObjCPropertyDecl(const ObjCPropertyDecl *D) {
1186   VisitNamedDecl(D);
1187   JOS.attribute("type", createQualType(D->getType()));
1188
1189   switch (D->getPropertyImplementation()) {
1190   case ObjCPropertyDecl::None: break;
1191   case ObjCPropertyDecl::Required: JOS.attribute("control", "required"); break;
1192   case ObjCPropertyDecl::Optional: JOS.attribute("control", "optional"); break;
1193   }
1194
1195   ObjCPropertyAttribute::Kind Attrs = D->getPropertyAttributes();
1196   if (Attrs != ObjCPropertyAttribute::kind_noattr) {
1197     if (Attrs & ObjCPropertyAttribute::kind_getter)
1198       JOS.attribute("getter", createBareDeclRef(D->getGetterMethodDecl()));
1199     if (Attrs & ObjCPropertyAttribute::kind_setter)
1200       JOS.attribute("setter", createBareDeclRef(D->getSetterMethodDecl()));
1201     attributeOnlyIfTrue("readonly",
1202                         Attrs & ObjCPropertyAttribute::kind_readonly);
1203     attributeOnlyIfTrue("assign", Attrs & ObjCPropertyAttribute::kind_assign);
1204     attributeOnlyIfTrue("readwrite",
1205                         Attrs & ObjCPropertyAttribute::kind_readwrite);
1206     attributeOnlyIfTrue("retain", Attrs & ObjCPropertyAttribute::kind_retain);
1207     attributeOnlyIfTrue("copy", Attrs & ObjCPropertyAttribute::kind_copy);
1208     attributeOnlyIfTrue("nonatomic",
1209                         Attrs & ObjCPropertyAttribute::kind_nonatomic);
1210     attributeOnlyIfTrue("atomic", Attrs & ObjCPropertyAttribute::kind_atomic);
1211     attributeOnlyIfTrue("weak", Attrs & ObjCPropertyAttribute::kind_weak);
1212     attributeOnlyIfTrue("strong", Attrs & ObjCPropertyAttribute::kind_strong);
1213     attributeOnlyIfTrue("unsafe_unretained",
1214                         Attrs & ObjCPropertyAttribute::kind_unsafe_unretained);
1215     attributeOnlyIfTrue("class", Attrs & ObjCPropertyAttribute::kind_class);
1216     attributeOnlyIfTrue("direct", Attrs & ObjCPropertyAttribute::kind_direct);
1217     attributeOnlyIfTrue("nullability",
1218                         Attrs & ObjCPropertyAttribute::kind_nullability);
1219     attributeOnlyIfTrue("null_resettable",
1220                         Attrs & ObjCPropertyAttribute::kind_null_resettable);
1221   }
1222 }
1223
1224 void JSONNodeDumper::VisitObjCPropertyImplDecl(const ObjCPropertyImplDecl *D) {
1225   VisitNamedDecl(D->getPropertyDecl());
1226   JOS.attribute("implKind", D->getPropertyImplementation() ==
1227                                     ObjCPropertyImplDecl::Synthesize
1228                                 ? "synthesize"
1229                                 : "dynamic");
1230   JOS.attribute("propertyDecl", createBareDeclRef(D->getPropertyDecl()));
1231   JOS.attribute("ivarDecl", createBareDeclRef(D->getPropertyIvarDecl()));
1232 }
1233
1234 void JSONNodeDumper::VisitBlockDecl(const BlockDecl *D) {
1235   attributeOnlyIfTrue("variadic", D->isVariadic());
1236   attributeOnlyIfTrue("capturesThis", D->capturesCXXThis());
1237 }
1238
1239 void JSONNodeDumper::VisitAtomicExpr(const AtomicExpr *AE) {
1240   JOS.attribute("name", AE->getOpAsString());
1241 }
1242
1243 void JSONNodeDumper::VisitObjCEncodeExpr(const ObjCEncodeExpr *OEE) {
1244   JOS.attribute("encodedType", createQualType(OEE->getEncodedType()));
1245 }
1246
1247 void JSONNodeDumper::VisitObjCMessageExpr(const ObjCMessageExpr *OME) {
1248   std::string Str;
1249   llvm::raw_string_ostream OS(Str);
1250
1251   OME->getSelector().print(OS);
1252   JOS.attribute("selector", Str);
1253
1254   switch (OME->getReceiverKind()) {
1255   case ObjCMessageExpr::Instance:
1256     JOS.attribute("receiverKind", "instance");
1257     break;
1258   case ObjCMessageExpr::Class:
1259     JOS.attribute("receiverKind", "class");
1260     JOS.attribute("classType", createQualType(OME->getClassReceiver()));
1261     break;
1262   case ObjCMessageExpr::SuperInstance:
1263     JOS.attribute("receiverKind", "super (instance)");
1264     JOS.attribute("superType", createQualType(OME->getSuperType()));
1265     break;
1266   case ObjCMessageExpr::SuperClass:
1267     JOS.attribute("receiverKind", "super (class)");
1268     JOS.attribute("superType", createQualType(OME->getSuperType()));
1269     break;
1270   }
1271
1272   QualType CallReturnTy = OME->getCallReturnType(Ctx);
1273   if (OME->getType() != CallReturnTy)
1274     JOS.attribute("callReturnType", createQualType(CallReturnTy));
1275 }
1276
1277 void JSONNodeDumper::VisitObjCBoxedExpr(const ObjCBoxedExpr *OBE) {
1278   if (const ObjCMethodDecl *MD = OBE->getBoxingMethod()) {
1279     std::string Str;
1280     llvm::raw_string_ostream OS(Str);
1281
1282     MD->getSelector().print(OS);
1283     JOS.attribute("selector", Str);
1284   }
1285 }
1286
1287 void JSONNodeDumper::VisitObjCSelectorExpr(const ObjCSelectorExpr *OSE) {
1288   std::string Str;
1289   llvm::raw_string_ostream OS(Str);
1290
1291   OSE->getSelector().print(OS);
1292   JOS.attribute("selector", Str);
1293 }
1294
1295 void JSONNodeDumper::VisitObjCProtocolExpr(const ObjCProtocolExpr *OPE) {
1296   JOS.attribute("protocol", createBareDeclRef(OPE->getProtocol()));
1297 }
1298
1299 void JSONNodeDumper::VisitObjCPropertyRefExpr(const ObjCPropertyRefExpr *OPRE) {
1300   if (OPRE->isImplicitProperty()) {
1301     JOS.attribute("propertyKind", "implicit");
1302     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertyGetter())
1303       JOS.attribute("getter", createBareDeclRef(MD));
1304     if (const ObjCMethodDecl *MD = OPRE->getImplicitPropertySetter())
1305       JOS.attribute("setter", createBareDeclRef(MD));
1306   } else {
1307     JOS.attribute("propertyKind", "explicit");
1308     JOS.attribute("property", createBareDeclRef(OPRE->getExplicitProperty()));
1309   }
1310
1311   attributeOnlyIfTrue("isSuperReceiver", OPRE->isSuperReceiver());
1312   attributeOnlyIfTrue("isMessagingGetter", OPRE->isMessagingGetter());
1313   attributeOnlyIfTrue("isMessagingSetter", OPRE->isMessagingSetter());
1314 }
1315
1316 void JSONNodeDumper::VisitObjCSubscriptRefExpr(
1317     const ObjCSubscriptRefExpr *OSRE) {
1318   JOS.attribute("subscriptKind",
1319                 OSRE->isArraySubscriptRefExpr() ? "array" : "dictionary");
1320
1321   if (const ObjCMethodDecl *MD = OSRE->getAtIndexMethodDecl())
1322     JOS.attribute("getter", createBareDeclRef(MD));
1323   if (const ObjCMethodDecl *MD = OSRE->setAtIndexMethodDecl())
1324     JOS.attribute("setter", createBareDeclRef(MD));
1325 }
1326
1327 void JSONNodeDumper::VisitObjCIvarRefExpr(const ObjCIvarRefExpr *OIRE) {
1328   JOS.attribute("decl", createBareDeclRef(OIRE->getDecl()));
1329   attributeOnlyIfTrue("isFreeIvar", OIRE->isFreeIvar());
1330   JOS.attribute("isArrow", OIRE->isArrow());
1331 }
1332
1333 void JSONNodeDumper::VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *OBLE) {
1334   JOS.attribute("value", OBLE->getValue() ? "__objc_yes" : "__objc_no");
1335 }
1336
1337 void JSONNodeDumper::VisitDeclRefExpr(const DeclRefExpr *DRE) {
1338   JOS.attribute("referencedDecl", createBareDeclRef(DRE->getDecl()));
1339   if (DRE->getDecl() != DRE->getFoundDecl())
1340     JOS.attribute("foundReferencedDecl",
1341                   createBareDeclRef(DRE->getFoundDecl()));
1342   switch (DRE->isNonOdrUse()) {
1343   case NOUR_None: break;
1344   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1345   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1346   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1347   }
1348   attributeOnlyIfTrue("isImmediateEscalating", DRE->isImmediateEscalating());
1349 }
1350
1351 void JSONNodeDumper::VisitSYCLUniqueStableNameExpr(
1352     const SYCLUniqueStableNameExpr *E) {
1353   JOS.attribute("typeSourceInfo",
1354                 createQualType(E->getTypeSourceInfo()->getType()));
1355 }
1356
1357 void JSONNodeDumper::VisitOpenACCAsteriskSizeExpr(
1358     const OpenACCAsteriskSizeExpr *E) {}
1359
1360 void JSONNodeDumper::VisitPredefinedExpr(const PredefinedExpr *PE) {
1361   JOS.attribute("name", PredefinedExpr::getIdentKindName(PE->getIdentKind()));
1362 }
1363
1364 void JSONNodeDumper::VisitUnaryOperator(const UnaryOperator *UO) {
1365   JOS.attribute("isPostfix", UO->isPostfix());
1366   JOS.attribute("opcode", UnaryOperator::getOpcodeStr(UO->getOpcode()));
1367   if (!UO->canOverflow())
1368     JOS.attribute("canOverflow", false);
1369 }
1370
1371 void JSONNodeDumper::VisitBinaryOperator(const BinaryOperator *BO) {
1372   JOS.attribute("opcode", BinaryOperator::getOpcodeStr(BO->getOpcode()));
1373 }
1374
1375 void JSONNodeDumper::VisitCompoundAssignOperator(
1376     const CompoundAssignOperator *CAO) {
1377   VisitBinaryOperator(CAO);
1378   JOS.attribute("computeLHSType", createQualType(CAO->getComputationLHSType()));
1379   JOS.attribute("computeResultType",
1380                 createQualType(CAO->getComputationResultType()));
1381 }
1382
1383 void JSONNodeDumper::VisitMemberExpr(const MemberExpr *ME) {
1384   // Note, we always write this Boolean field because the information it conveys
1385   // is critical to understanding the AST node.
1386   ValueDecl *VD = ME->getMemberDecl();
1387   JOS.attribute("name", VD && VD->getDeclName() ? VD->getNameAsString() : "");
1388   JOS.attribute("isArrow", ME->isArrow());
1389   JOS.attribute("referencedMemberDecl", createPointerRepresentation(VD));
1390   switch (ME->isNonOdrUse()) {
1391   case NOUR_None: break;
1392   case NOUR_Unevaluated: JOS.attribute("nonOdrUseReason", "unevaluated"); break;
1393   case NOUR_Constant: JOS.attribute("nonOdrUseReason", "constant"); break;
1394   case NOUR_Discarded: JOS.attribute("nonOdrUseReason", "discarded"); break;
1395   }
1396 }
1397
1398 void JSONNodeDumper::VisitCXXNewExpr(const CXXNewExpr *NE) {
1399   attributeOnlyIfTrue("isGlobal", NE->isGlobalNew());
1400   attributeOnlyIfTrue("isArray", NE->isArray());
1401   attributeOnlyIfTrue("isPlacement", NE->getNumPlacementArgs() != 0);
1402   switch (NE->getInitializationStyle()) {
1403   case CXXNewInitializationStyle::None:
1404     break;
1405   case CXXNewInitializationStyle::Parens:
1406     JOS.attribute("initStyle", "call");
1407     break;
1408   case CXXNewInitializationStyle::Braces:
1409     JOS.attribute("initStyle", "list");
1410     break;
1411   }
1412   if (const FunctionDecl *FD = NE->getOperatorNew())
1413     JOS.attribute("operatorNewDecl", createBareDeclRef(FD));
1414   if (const FunctionDecl *FD = NE->getOperatorDelete())
1415     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1416 }
1417 void JSONNodeDumper::VisitCXXDeleteExpr(const CXXDeleteExpr *DE) {
1418   attributeOnlyIfTrue("isGlobal", DE->isGlobalDelete());
1419   attributeOnlyIfTrue("isArray", DE->isArrayForm());
1420   attributeOnlyIfTrue("isArrayAsWritten", DE->isArrayFormAsWritten());
1421   if (const FunctionDecl *FD = DE->getOperatorDelete())
1422     JOS.attribute("operatorDeleteDecl", createBareDeclRef(FD));
1423 }
1424
1425 void JSONNodeDumper::VisitCXXThisExpr(const CXXThisExpr *TE) {
1426   attributeOnlyIfTrue("implicit", TE->isImplicit());
1427 }
1428
1429 void JSONNodeDumper::VisitCastExpr(const CastExpr *CE) {
1430   JOS.attribute("castKind", CE->getCastKindName());
1431   llvm::json::Array Path = createCastPath(CE);
1432   if (!Path.empty())
1433     JOS.attribute("path", std::move(Path));
1434   // FIXME: This may not be useful information as it can be obtusely gleaned
1435   // from the inner[] array.
1436   if (const NamedDecl *ND = CE->getConversionFunction())
1437     JOS.attribute("conversionFunc", createBareDeclRef(ND));
1438 }
1439
1440 void JSONNodeDumper::VisitImplicitCastExpr(const ImplicitCastExpr *ICE) {
1441   VisitCastExpr(ICE);
1442   attributeOnlyIfTrue("isPartOfExplicitCast", ICE->isPartOfExplicitCast());
1443 }
1444
1445 void JSONNodeDumper::VisitCallExpr(const CallExpr *CE) {
1446   attributeOnlyIfTrue("adl", CE->usesADL());
1447 }
1448
1449 void JSONNodeDumper::VisitUnaryExprOrTypeTraitExpr(
1450     const UnaryExprOrTypeTraitExpr *TTE) {
1451   JOS.attribute("name", getTraitSpelling(TTE->getKind()));
1452   if (TTE->isArgumentType())
1453     JOS.attribute("argType", createQualType(TTE->getArgumentType()));
1454 }
1455
1456 void JSONNodeDumper::VisitSizeOfPackExpr(const SizeOfPackExpr *SOPE) {
1457   VisitNamedDecl(SOPE->getPack());
1458 }
1459
1460 void JSONNodeDumper::VisitUnresolvedLookupExpr(
1461     const UnresolvedLookupExpr *ULE) {
1462   JOS.attribute("usesADL", ULE->requiresADL());
1463   JOS.attribute("name", ULE->getName().getAsString());
1464
1465   JOS.attributeArray("lookups", [this, ULE] {
1466     for (const NamedDecl *D : ULE->decls())
1467       JOS.value(createBareDeclRef(D));
1468   });
1469 }
1470
1471 void JSONNodeDumper::VisitAddrLabelExpr(const AddrLabelExpr *ALE) {
1472   JOS.attribute("name", ALE->getLabel()->getName());
1473   JOS.attribute("labelDeclId", createPointerRepresentation(ALE->getLabel()));
1474 }
1475
1476 void JSONNodeDumper::VisitCXXTypeidExpr(const CXXTypeidExpr *CTE) {
1477   if (CTE->isTypeOperand()) {
1478     QualType Adjusted = CTE->getTypeOperand(Ctx);
1479     QualType Unadjusted = CTE->getTypeOperandSourceInfo()->getType();
1480     JOS.attribute("typeArg", createQualType(Unadjusted));
1481     if (Adjusted != Unadjusted)
1482       JOS.attribute("adjustedTypeArg", createQualType(Adjusted));
1483   }
1484 }
1485
1486 void JSONNodeDumper::VisitConstantExpr(const ConstantExpr *CE) {
1487   if (CE->getResultAPValueKind() != APValue::None)
1488     Visit(CE->getAPValueResult(), CE->getType());
1489 }
1490
1491 void JSONNodeDumper::VisitInitListExpr(const InitListExpr *ILE) {
1492   if (const FieldDecl *FD = ILE->getInitializedFieldInUnion())
1493     JOS.attribute("field", createBareDeclRef(FD));
1494 }
1495
1496 void JSONNodeDumper::VisitGenericSelectionExpr(
1497     const GenericSelectionExpr *GSE) {
1498   attributeOnlyIfTrue("resultDependent", GSE->isResultDependent());
1499 }
1500
1501 void JSONNodeDumper::VisitCXXUnresolvedConstructExpr(
1502     const CXXUnresolvedConstructExpr *UCE) {
1503   if (UCE->getType() != UCE->getTypeAsWritten())
1504     JOS.attribute("typeAsWritten", createQualType(UCE->getTypeAsWritten()));
1505   attributeOnlyIfTrue("list", UCE->isListInitialization());
1506 }
1507
1508 void JSONNodeDumper::VisitCXXConstructExpr(const CXXConstructExpr *CE) {
1509   CXXConstructorDecl *Ctor = CE->getConstructor();
1510   JOS.attribute("ctorType", createQualType(Ctor->getType()));
1511   attributeOnlyIfTrue("elidable", CE->isElidable());
1512   attributeOnlyIfTrue("list", CE->isListInitialization());
1513   attributeOnlyIfTrue("initializer_list", CE->isStdInitListInitialization());
1514   attributeOnlyIfTrue("zeroing", CE->requiresZeroInitialization());
1515   attributeOnlyIfTrue("hadMultipleCandidates", CE->hadMultipleCandidates());
1516   attributeOnlyIfTrue("isImmediateEscalating", CE->isImmediateEscalating());
1517
1518   switch (CE->getConstructionKind()) {
1519   case CXXConstructionKind::Complete:
1520     JOS.attribute("constructionKind", "complete");
1521     break;
1522   case CXXConstructionKind::Delegating:
1523     JOS.attribute("constructionKind", "delegating");
1524     break;
1525   case CXXConstructionKind::NonVirtualBase:
1526     JOS.attribute("constructionKind", "non-virtual base");
1527     break;
1528   case CXXConstructionKind::VirtualBase:
1529     JOS.attribute("constructionKind", "virtual base");
1530     break;
1531   }
1532 }
1533
1534 void JSONNodeDumper::VisitExprWithCleanups(const ExprWithCleanups *EWC) {
1535   attributeOnlyIfTrue("cleanupsHaveSideEffects",
1536                       EWC->cleanupsHaveSideEffects());
1537   if (EWC->getNumObjects()) {
1538     JOS.attributeArray("cleanups", [this, EWC] {
1539       for (const ExprWithCleanups::CleanupObject &CO : EWC->getObjects())
1540         if (auto *BD = CO.dyn_cast<BlockDecl *>()) {
1541           JOS.value(createBareDeclRef(BD));
1542         } else if (auto *CLE = CO.dyn_cast<CompoundLiteralExpr *>()) {
1543           llvm::json::Object Obj;
1544           Obj["id"] = createPointerRepresentation(CLE);
1545           Obj["kind"] = CLE->getStmtClassName();
1546           JOS.value(std::move(Obj));
1547         } else {
1548           llvm_unreachable("unexpected cleanup object type");
1549         }
1550     });
1551   }
1552 }
1553
1554 void JSONNodeDumper::VisitCXXBindTemporaryExpr(
1555     const CXXBindTemporaryExpr *BTE) {
1556   const CXXTemporary *Temp = BTE->getTemporary();
1557   JOS.attribute("temp", createPointerRepresentation(Temp));
1558   if (const CXXDestructorDecl *Dtor = Temp->getDestructor())
1559     JOS.attribute("dtor", createBareDeclRef(Dtor));
1560 }
1561
1562 void JSONNodeDumper::VisitMaterializeTemporaryExpr(
1563     const MaterializeTemporaryExpr *MTE) {
1564   if (const ValueDecl *VD = MTE->getExtendingDecl())
1565     JOS.attribute("extendingDecl", createBareDeclRef(VD));
1566
1567   switch (MTE->getStorageDuration()) {
1568   case SD_Automatic:
1569     JOS.attribute("storageDuration", "automatic");
1570     break;
1571   case SD_Dynamic:
1572     JOS.attribute("storageDuration", "dynamic");
1573     break;
1574   case SD_FullExpression:
1575     JOS.attribute("storageDuration", "full expression");
1576     break;
1577   case SD_Static:
1578     JOS.attribute("storageDuration", "static");
1579     break;
1580   case SD_Thread:
1581     JOS.attribute("storageDuration", "thread");
1582     break;
1583   }
1584
1585   attributeOnlyIfTrue("boundToLValueRef", MTE->isBoundToLvalueReference());
1586 }
1587
1588 void JSONNodeDumper::VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *Node) {
1589   attributeOnlyIfTrue("hasRewrittenInit", Node->hasRewrittenInit());
1590 }
1591
1592 void JSONNodeDumper::VisitCXXDefaultInitExpr(const CXXDefaultInitExpr *Node) {
1593   attributeOnlyIfTrue("hasRewrittenInit", Node->hasRewrittenInit());
1594 }
1595
1596 void JSONNodeDumper::VisitCXXDependentScopeMemberExpr(
1597     const CXXDependentScopeMemberExpr *DSME) {
1598   JOS.attribute("isArrow", DSME->isArrow());
1599   JOS.attribute("member", DSME->getMember().getAsString());
1600   attributeOnlyIfTrue("hasTemplateKeyword", DSME->hasTemplateKeyword());
1601   attributeOnlyIfTrue("hasExplicitTemplateArgs",
1602                       DSME->hasExplicitTemplateArgs());
1603
1604   if (DSME->getNumTemplateArgs()) {
1605     JOS.attributeArray("explicitTemplateArgs", [DSME, this] {
1606       for (const TemplateArgumentLoc &TAL : DSME->template_arguments())
1607         JOS.object(
1608             [&TAL, this] { Visit(TAL.getArgument(), TAL.getSourceRange()); });
1609     });
1610   }
1611 }
1612
1613 void JSONNodeDumper::VisitRequiresExpr(const RequiresExpr *RE) {
1614   if (!RE->isValueDependent())
1615     JOS.attribute("satisfied", RE->isSatisfied());
1616 }
1617
1618 void JSONNodeDumper::VisitIntegerLiteral(const IntegerLiteral *IL) {
1619   llvm::SmallString<16> Buffer;
1620   IL->getValue().toString(Buffer,
1621                           /*Radix=*/10, IL->getType()->isSignedIntegerType());
1622   JOS.attribute("value", Buffer);
1623 }
1624 void JSONNodeDumper::VisitCharacterLiteral(const CharacterLiteral *CL) {
1625   // FIXME: This should probably print the character literal as a string,
1626   // rather than as a numerical value. It would be nice if the behavior matched
1627   // what we do to print a string literal; right now, it is impossible to tell
1628   // the difference between 'a' and L'a' in C from the JSON output.
1629   JOS.attribute("value", CL->getValue());
1630 }
1631 void JSONNodeDumper::VisitFixedPointLiteral(const FixedPointLiteral *FPL) {
1632   JOS.attribute("value", FPL->getValueAsString(/*Radix=*/10));
1633 }
1634 void JSONNodeDumper::VisitFloatingLiteral(const FloatingLiteral *FL) {
1635   llvm::SmallString<16> Buffer;
1636   FL->getValue().toString(Buffer);
1637   JOS.attribute("value", Buffer);
1638 }
1639 void JSONNodeDumper::VisitStringLiteral(const StringLiteral *SL) {
1640   std::string Buffer;
1641   llvm::raw_string_ostream SS(Buffer);
1642   SL->outputString(SS);
1643   JOS.attribute("value", Buffer);
1644 }
1645 void JSONNodeDumper::VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *BLE) {
1646   JOS.attribute("value", BLE->getValue());
1647 }
1648
1649 void JSONNodeDumper::VisitIfStmt(const IfStmt *IS) {
1650   attributeOnlyIfTrue("hasInit", IS->hasInitStorage());
1651   attributeOnlyIfTrue("hasVar", IS->hasVarStorage());
1652   attributeOnlyIfTrue("hasElse", IS->hasElseStorage());
1653   attributeOnlyIfTrue("isConstexpr", IS->isConstexpr());
1654   attributeOnlyIfTrue("isConsteval", IS->isConsteval());
1655   attributeOnlyIfTrue("constevalIsNegated", IS->isNegatedConsteval());
1656 }
1657
1658 void JSONNodeDumper::VisitSwitchStmt(const SwitchStmt *SS) {
1659   attributeOnlyIfTrue("hasInit", SS->hasInitStorage());
1660   attributeOnlyIfTrue("hasVar", SS->hasVarStorage());
1661 }
1662 void JSONNodeDumper::VisitCaseStmt(const CaseStmt *CS) {
1663   attributeOnlyIfTrue("isGNURange", CS->caseStmtIsGNURange());
1664 }
1665
1666 void JSONNodeDumper::VisitLabelStmt(const LabelStmt *LS) {
1667   JOS.attribute("name", LS->getName());
1668   JOS.attribute("declId", createPointerRepresentation(LS->getDecl()));
1669   attributeOnlyIfTrue("sideEntry", LS->isSideEntry());
1670 }
1671 void JSONNodeDumper::VisitGotoStmt(const GotoStmt *GS) {
1672   JOS.attribute("targetLabelDeclId",
1673                 createPointerRepresentation(GS->getLabel()));
1674 }
1675
1676 void JSONNodeDumper::VisitWhileStmt(const WhileStmt *WS) {
1677   attributeOnlyIfTrue("hasVar", WS->hasVarStorage());
1678 }
1679
1680 void JSONNodeDumper::VisitObjCAtCatchStmt(const ObjCAtCatchStmt* OACS) {
1681   // FIXME: it would be nice for the ASTNodeTraverser would handle the catch
1682   // parameter the same way for C++ and ObjC rather. In this case, C++ gets a
1683   // null child node and ObjC gets no child node.
1684   attributeOnlyIfTrue("isCatchAll", OACS->getCatchParamDecl() == nullptr);
1685 }
1686
1687 void JSONNodeDumper::VisitNullTemplateArgument(const TemplateArgument &TA) {
1688   JOS.attribute("isNull", true);
1689 }
1690 void JSONNodeDumper::VisitTypeTemplateArgument(const TemplateArgument &TA) {
1691   JOS.attribute("type", createQualType(TA.getAsType()));
1692 }
1693 void JSONNodeDumper::VisitDeclarationTemplateArgument(
1694     const TemplateArgument &TA) {
1695   JOS.attribute("decl", createBareDeclRef(TA.getAsDecl()));
1696 }
1697 void JSONNodeDumper::VisitNullPtrTemplateArgument(const TemplateArgument &TA) {
1698   JOS.attribute("isNullptr", true);
1699 }
1700 void JSONNodeDumper::VisitIntegralTemplateArgument(const TemplateArgument &TA) {
1701   JOS.attribute("value", TA.getAsIntegral().getSExtValue());
1702 }
1703 void JSONNodeDumper::VisitTemplateTemplateArgument(const TemplateArgument &TA) {
1704   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1705   // the output format.
1706 }
1707 void JSONNodeDumper::VisitTemplateExpansionTemplateArgument(
1708     const TemplateArgument &TA) {
1709   // FIXME: cannot just call dump() on the argument, as that doesn't specify
1710   // the output format.
1711 }
1712 void JSONNodeDumper::VisitExpressionTemplateArgument(
1713     const TemplateArgument &TA) {
1714   JOS.attribute("isExpr", true);
1715 }
1716 void JSONNodeDumper::VisitPackTemplateArgument(const TemplateArgument &TA) {
1717   JOS.attribute("isPack", true);
1718 }
1719
1720 StringRef JSONNodeDumper::getCommentCommandName(unsigned CommandID) const {
1721   if (Traits)
1722     return Traits->getCommandInfo(CommandID)->Name;
1723   if (const comments::CommandInfo *Info =
1724           comments::CommandTraits::getBuiltinCommandInfo(CommandID))
1725     return Info->Name;
1726   return "<invalid>";
1727 }
1728
1729 void JSONNodeDumper::visitTextComment(const comments::TextComment *C,
1730                                       const comments::FullComment *) {
1731   JOS.attribute("text", C->getText());
1732 }
1733
1734 void JSONNodeDumper::visitInlineCommandComment(
1735     const comments::InlineCommandComment *C, const comments::FullComment *) {
1736   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1737
1738   switch (C->getRenderKind()) {
1739   case comments::InlineCommandRenderKind::Normal:
1740     JOS.attribute("renderKind", "normal");
1741     break;
1742   case comments::InlineCommandRenderKind::Bold:
1743     JOS.attribute("renderKind", "bold");
1744     break;
1745   case comments::InlineCommandRenderKind::Emphasized:
1746     JOS.attribute("renderKind", "emphasized");
1747     break;
1748   case comments::InlineCommandRenderKind::Monospaced:
1749     JOS.attribute("renderKind", "monospaced");
1750     break;
1751   case comments::InlineCommandRenderKind::Anchor:
1752     JOS.attribute("renderKind", "anchor");
1753     break;
1754   }
1755
1756   llvm::json::Array Args;
1757   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1758     Args.push_back(C->getArgText(I));
1759
1760   if (!Args.empty())
1761     JOS.attribute("args", std::move(Args));
1762 }
1763
1764 void JSONNodeDumper::visitHTMLStartTagComment(
1765     const comments::HTMLStartTagComment *C, const comments::FullComment *) {
1766   JOS.attribute("name", C->getTagName());
1767   attributeOnlyIfTrue("selfClosing", C->isSelfClosing());
1768   attributeOnlyIfTrue("malformed", C->isMalformed());
1769
1770   llvm::json::Array Attrs;
1771   for (unsigned I = 0, E = C->getNumAttrs(); I < E; ++I)
1772     Attrs.push_back(
1773         {{"name", C->getAttr(I).Name}, {"value", C->getAttr(I).Value}});
1774
1775   if (!Attrs.empty())
1776     JOS.attribute("attrs", std::move(Attrs));
1777 }
1778
1779 void JSONNodeDumper::visitHTMLEndTagComment(
1780     const comments::HTMLEndTagComment *C, const comments::FullComment *) {
1781   JOS.attribute("name", C->getTagName());
1782 }
1783
1784 void JSONNodeDumper::visitBlockCommandComment(
1785     const comments::BlockCommandComment *C, const comments::FullComment *) {
1786   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1787
1788   llvm::json::Array Args;
1789   for (unsigned I = 0, E = C->getNumArgs(); I < E; ++I)
1790     Args.push_back(C->getArgText(I));
1791
1792   if (!Args.empty())
1793     JOS.attribute("args", std::move(Args));
1794 }
1795
1796 void JSONNodeDumper::visitParamCommandComment(
1797     const comments::ParamCommandComment *C, const comments::FullComment *FC) {
1798   switch (C->getDirection()) {
1799   case comments::ParamCommandPassDirection::In:
1800     JOS.attribute("direction", "in");
1801     break;
1802   case comments::ParamCommandPassDirection::Out:
1803     JOS.attribute("direction", "out");
1804     break;
1805   case comments::ParamCommandPassDirection::InOut:
1806     JOS.attribute("direction", "in,out");
1807     break;
1808   }
1809   attributeOnlyIfTrue("explicit", C->isDirectionExplicit());
1810
1811   if (C->hasParamName())
1812     JOS.attribute("param", C->isParamIndexValid() ? C->getParamName(FC)
1813                                                   : C->getParamNameAsWritten());
1814
1815   if (C->isParamIndexValid() && !C->isVarArgParam())
1816     JOS.attribute("paramIdx", C->getParamIndex());
1817 }
1818
1819 void JSONNodeDumper::visitTParamCommandComment(
1820     const comments::TParamCommandComment *C, const comments::FullComment *FC) {
1821   if (C->hasParamName())
1822     JOS.attribute("param", C->isPositionValid() ? C->getParamName(FC)
1823                                                 : C->getParamNameAsWritten());
1824   if (C->isPositionValid()) {
1825     llvm::json::Array Positions;
1826     for (unsigned I = 0, E = C->getDepth(); I < E; ++I)
1827       Positions.push_back(C->getIndex(I));
1828
1829     if (!Positions.empty())
1830       JOS.attribute("positions", std::move(Positions));
1831   }
1832 }
1833
1834 void JSONNodeDumper::visitVerbatimBlockComment(
1835     const comments::VerbatimBlockComment *C, const comments::FullComment *) {
1836   JOS.attribute("name", getCommentCommandName(C->getCommandID()));
1837   JOS.attribute("closeName", C->getCloseName());
1838 }
1839
1840 void JSONNodeDumper::visitVerbatimBlockLineComment(
1841     const comments::VerbatimBlockLineComment *C,
1842     const comments::FullComment *) {
1843   JOS.attribute("text", C->getText());
1844 }
1845
1846 void JSONNodeDumper::visitVerbatimLineComment(
1847     const comments::VerbatimLineComment *C, const comments::FullComment *) {
1848   JOS.attribute("text", C->getText());
1849 }
1850
1851 llvm::json::Object JSONNodeDumper::createFPOptions(FPOptionsOverride FPO) {
1852   llvm::json::Object Ret;
1853 #define OPTION(NAME, TYPE, WIDTH, PREVIOUS)                                    \
1854   if (FPO.has##NAME##Override())                                               \
1855     Ret.try_emplace(#NAME, static_cast<unsigned>(FPO.get##NAME##Override()));
1856 #include "clang/Basic/FPOptions.def"
1857   return Ret;
1858 }
1859
1860 void JSONNodeDumper::VisitCompoundStmt(const CompoundStmt *S) {
1861   VisitStmt(S);
1862   if (S->hasStoredFPFeatures())
1863     JOS.attribute("fpoptions", createFPOptions(S->getStoredFPFeatures()));
1864 }