1 files changed, 566 insertions, 0 deletions
diff --git a/contrib/llvm-project/clang/lib/ExtractAPI/API.cpp b/contrib/llvm-project/clang/lib/ExtractAPI/API.cpp
new file mode 100644
index 000000000000..aa7a1e9360f4
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/ExtractAPI/API.cpp
@@ -0,0 +1,566 @@
+//===- ExtractAPI/API.cpp ---------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements the APIRecord and derived record structs,
+/// and the APISet class.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/ExtractAPI/API.h"
+#include "clang/AST/CommentCommandTraits.h"
+#include "clang/AST/CommentLexer.h"
+#include "clang/AST/RawCommentList.h"
+#include "clang/Index/USRGeneration.h"
+#include "llvm/ADT/StringRef.h"
+#include <memory>
+
+using namespace clang::extractapi;
+using namespace llvm;
+
+namespace {
+
+template <typename RecordTy, typename... CtorArgsTy>
+RecordTy *addTopLevelRecord(DenseMap<StringRef, APIRecord *> &USRLookupTable,
+                            APISet::RecordMap<RecordTy> &RecordMap,
+                            StringRef USR, CtorArgsTy &&...CtorArgs) {
+  auto Result = RecordMap.insert({USR, nullptr});
+
+  // Create the record if it does not already exist
+  if (Result.second)
+    Result.first->second =
+        std::make_unique<RecordTy>(USR, std::forward<CtorArgsTy>(CtorArgs)...);
+
+  auto *Record = Result.first->second.get();
+  USRLookupTable.insert({USR, Record});
+  return Record;
+}
+
+} // namespace
+
+NamespaceRecord *
+APISet::addNamespace(APIRecord *Parent, StringRef Name, StringRef USR,
+                     PresumedLoc Loc, AvailabilityInfo Availability,
+                     LinkageInfo Linkage, const DocComment &Comment,
+                     DeclarationFragments Declaration,
+                     DeclarationFragments SubHeading, bool IsFromSystemHeader) {
+  auto *Record = addTopLevelRecord(
+      USRBasedLookupTable, Namespaces, USR, Name, Loc, std::move(Availability),
+      Linkage, Comment, Declaration, SubHeading, IsFromSystemHeader);
+
+  if (Parent)
+    Record->ParentInformation = APIRecord::HierarchyInformation(
+        Parent->USR, Parent->Name, Parent->getKind(), Parent);
+  return Record;
+}
+
+GlobalVariableRecord *
+APISet::addGlobalVar(StringRef Name, StringRef USR, PresumedLoc Loc,
+                     AvailabilityInfo Availability, LinkageInfo Linkage,
+                     const DocComment &Comment, DeclarationFragments Fragments,
+                     DeclarationFragments SubHeading, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, GlobalVariables, USR, Name, Loc,
+                           std::move(Availability), Linkage, Comment, Fragments,
+                           SubHeading, IsFromSystemHeader);
+}
+
+GlobalVariableTemplateRecord *APISet::addGlobalVariableTemplate(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Declaration,
+    DeclarationFragments SubHeading, Template Template,
+    bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, GlobalVariableTemplates, USR,
+                           Name, Loc, std::move(Availability), Linkage, Comment,
+                           Declaration, SubHeading, Template,
+                           IsFromSystemHeader);
+}
+
+GlobalFunctionRecord *APISet::addGlobalFunction(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Fragments,
+    DeclarationFragments SubHeading, FunctionSignature Signature,
+    bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, GlobalFunctions, USR, Name, Loc,
+                           std::move(Availability), Linkage, Comment, Fragments,
+                           SubHeading, Signature, IsFromSystemHeader);
+}
+
+GlobalFunctionTemplateRecord *APISet::addGlobalFunctionTemplate(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Declaration,
+    DeclarationFragments SubHeading, FunctionSignature Signature,
+    Template Template, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, GlobalFunctionTemplates, USR,
+                           Name, Loc, std::move(Availability), Linkage, Comment,
+                           Declaration, SubHeading, Signature, Template,
+                           IsFromSystemHeader);
+}
+
+GlobalFunctionTemplateSpecializationRecord *
+APISet::addGlobalFunctionTemplateSpecialization(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Declaration,
+    DeclarationFragments SubHeading, FunctionSignature Signature,
+    bool IsFromSystemHeader) {
+  return addTopLevelRecord(
+      USRBasedLookupTable, GlobalFunctionTemplateSpecializations, USR, Name,
+      Loc, std::move(Availability), Linkage, Comment, Declaration, SubHeading,
+      Signature, IsFromSystemHeader);
+}
+
+EnumConstantRecord *APISet::addEnumConstant(EnumRecord *Enum, StringRef Name,
+                                            StringRef USR, PresumedLoc Loc,
+                                            AvailabilityInfo Availability,
+                                            const DocComment &Comment,
+                                            DeclarationFragments Declaration,
+                                            DeclarationFragments SubHeading,
+                                            bool IsFromSystemHeader) {
+  auto Record = std::make_unique<EnumConstantRecord>(
+      USR, Name, Loc, std::move(Availability), Comment, Declaration, SubHeading,
+      IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Enum->USR, Enum->Name, Enum->getKind(), Enum);
+  USRBasedLookupTable.insert({USR, Record.get()});
+  return Enum->Constants.emplace_back(std::move(Record)).get();
+}
+
+EnumRecord *APISet::addEnum(StringRef Name, StringRef USR, PresumedLoc Loc,
+                            AvailabilityInfo Availability,
+                            const DocComment &Comment,
+                            DeclarationFragments Declaration,
+                            DeclarationFragments SubHeading,
+                            bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, Enums, USR, Name, Loc,
+                           std::move(Availability), Comment, Declaration,
+                           SubHeading, IsFromSystemHeader);
+}
+
+RecordFieldRecord *APISet::addRecordField(
+    RecordRecord *Record, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    APIRecord::RecordKind Kind, bool IsFromSystemHeader) {
+  auto RecordField = std::make_unique<RecordFieldRecord>(
+      USR, Name, Loc, std::move(Availability), Comment, Declaration, SubHeading,
+      Kind, IsFromSystemHeader);
+  RecordField->ParentInformation = APIRecord::HierarchyInformation(
+      Record->USR, Record->Name, Record->getKind(), Record);
+  USRBasedLookupTable.insert({USR, RecordField.get()});
+  return Record->Fields.emplace_back(std::move(RecordField)).get();
+}
+
+RecordRecord *APISet::addRecord(StringRef Name, StringRef USR, PresumedLoc Loc,
+                                AvailabilityInfo Availability,
+                                const DocComment &Comment,
+                                DeclarationFragments Declaration,
+                                DeclarationFragments SubHeading,
+                                APIRecord::RecordKind Kind,
+                                bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, Records, USR, Name, Loc,
+                           std::move(Availability), Comment, Declaration,
+                           SubHeading, Kind, IsFromSystemHeader);
+}
+
+StaticFieldRecord *
+APISet::addStaticField(StringRef Name, StringRef USR, PresumedLoc Loc,
+                       AvailabilityInfo Availability, LinkageInfo Linkage,
+                       const DocComment &Comment,
+                       DeclarationFragments Declaration,
+                       DeclarationFragments SubHeading, SymbolReference Context,
+                       AccessControl Access, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, StaticFields, USR, Name, Loc,
+                           std::move(Availability), Linkage, Comment,
+                           Declaration, SubHeading, Context, Access,
+                           IsFromSystemHeader);
+}
+
+CXXFieldRecord *
+APISet::addCXXField(APIRecord *CXXClass, StringRef Name, StringRef USR,
+                    PresumedLoc Loc, AvailabilityInfo Availability,
+                    const DocComment &Comment, DeclarationFragments Declaration,
+                    DeclarationFragments SubHeading, AccessControl Access,
+                    bool IsFromSystemHeader) {
+  auto *Record = addTopLevelRecord(
+      USRBasedLookupTable, CXXFields, USR, Name, Loc, std::move(Availability),
+      Comment, Declaration, SubHeading, Access, IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      CXXClass->USR, CXXClass->Name, CXXClass->getKind(), CXXClass);
+  return Record;
+}
+
+CXXFieldTemplateRecord *APISet::addCXXFieldTemplate(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    AccessControl Access, Template Template, bool IsFromSystemHeader) {
+  auto *Record =
+      addTopLevelRecord(USRBasedLookupTable, CXXFieldTemplates, USR, Name, Loc,
+                        std::move(Availability), Comment, Declaration,
+                        SubHeading, Access, Template, IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Parent->USR, Parent->Name, Parent->getKind(), Parent);
+
+  return Record;
+}
+
+CXXClassRecord *
+APISet::addCXXClass(APIRecord *Parent, StringRef Name, StringRef USR,
+                    PresumedLoc Loc, AvailabilityInfo Availability,
+                    const DocComment &Comment, DeclarationFragments Declaration,
+                    DeclarationFragments SubHeading, APIRecord::RecordKind Kind,
+                    AccessControl Access, bool IsFromSystemHeader) {
+  auto *Record = addTopLevelRecord(
+      USRBasedLookupTable, CXXClasses, USR, Name, Loc, std::move(Availability),
+      Comment, Declaration, SubHeading, Kind, Access, IsFromSystemHeader);
+  if (Parent)
+    Record->ParentInformation = APIRecord::HierarchyInformation(
+        Parent->USR, Parent->Name, Parent->getKind(), Parent);
+  return Record;
+}
+
+ClassTemplateRecord *APISet::addClassTemplate(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    Template Template, AccessControl Access, bool IsFromSystemHeader) {
+  auto *Record =
+      addTopLevelRecord(USRBasedLookupTable, ClassTemplates, USR, Name, Loc,
+                        std::move(Availability), Comment, Declaration,
+                        SubHeading, Template, Access, IsFromSystemHeader);
+  if (Parent)
+    Record->ParentInformation = APIRecord::HierarchyInformation(
+        Parent->USR, Parent->Name, Parent->getKind(), Parent);
+  return Record;
+}
+
+ClassTemplateSpecializationRecord *APISet::addClassTemplateSpecialization(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    AccessControl Access, bool IsFromSystemHeader) {
+  auto *Record =
+      addTopLevelRecord(USRBasedLookupTable, ClassTemplateSpecializations, USR,
+                        Name, Loc, std::move(Availability), Comment,
+                        Declaration, SubHeading, Access, IsFromSystemHeader);
+  if (Parent)
+    Record->ParentInformation = APIRecord::HierarchyInformation(
+        Parent->USR, Parent->Name, Parent->getKind(), Parent);
+  return Record;
+}
+
+ClassTemplatePartialSpecializationRecord *
+APISet::addClassTemplatePartialSpecialization(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    Template Template, AccessControl Access, bool IsFromSystemHeader) {
+  auto *Record = addTopLevelRecord(
+      USRBasedLookupTable, ClassTemplatePartialSpecializations, USR, Name, Loc,
+      std::move(Availability), Comment, Declaration, SubHeading, Template,
+      Access, IsFromSystemHeader);
+  if (Parent)
+    Record->ParentInformation = APIRecord::HierarchyInformation(
+        Parent->USR, Parent->Name, Parent->getKind(), Parent);
+  return Record;
+}
+
+GlobalVariableTemplateSpecializationRecord *
+APISet::addGlobalVariableTemplateSpecialization(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Declaration,
+    DeclarationFragments SubHeading, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable,
+                           GlobalVariableTemplateSpecializations, USR, Name,
+                           Loc, std::move(Availability), Linkage, Comment,
+                           Declaration, SubHeading, IsFromSystemHeader);
+}
+
+GlobalVariableTemplatePartialSpecializationRecord *
+APISet::addGlobalVariableTemplatePartialSpecialization(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, LinkageInfo Linkage,
+    const DocComment &Comment, DeclarationFragments Declaration,
+    DeclarationFragments SubHeading, Template Template,
+    bool IsFromSystemHeader) {
+  return addTopLevelRecord(
+      USRBasedLookupTable, GlobalVariableTemplatePartialSpecializations, USR,
+      Name, Loc, std::move(Availability), Linkage, Comment, Declaration,
+      SubHeading, Template, IsFromSystemHeader);
+}
+
+ConceptRecord *APISet::addConcept(StringRef Name, StringRef USR,
+                                  PresumedLoc Loc,
+                                  AvailabilityInfo Availability,
+                                  const DocComment &Comment,
+                                  DeclarationFragments Declaration,
+                                  DeclarationFragments SubHeading,
+                                  Template Template, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, Concepts, USR, Name, Loc,
+                           std::move(Availability), Comment, Declaration,
+                           SubHeading, Template, IsFromSystemHeader);
+}
+
+CXXMethodRecord *APISet::addCXXInstanceMethod(
+    APIRecord *CXXClassRecord, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    FunctionSignature Signature, AccessControl Access,
+    bool IsFromSystemHeader) {
+  CXXMethodRecord *Record =
+      addTopLevelRecord(USRBasedLookupTable, CXXInstanceMethods, USR, Name, Loc,
+                        std::move(Availability), Comment, Declaration,
+                        SubHeading, Signature, Access, IsFromSystemHeader);
+
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      CXXClassRecord->USR, CXXClassRecord->Name, CXXClassRecord->getKind(),
+      CXXClassRecord);
+  return Record;
+}
+
+CXXMethodRecord *APISet::addCXXStaticMethod(
+    APIRecord *CXXClassRecord, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    FunctionSignature Signature, AccessControl Access,
+    bool IsFromSystemHeader) {
+  CXXMethodRecord *Record =
+      addTopLevelRecord(USRBasedLookupTable, CXXStaticMethods, USR, Name, Loc,
+                        std::move(Availability), Comment, Declaration,
+                        SubHeading, Signature, Access, IsFromSystemHeader);
+
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      CXXClassRecord->USR, CXXClassRecord->Name, CXXClassRecord->getKind(),
+      CXXClassRecord);
+  return Record;
+}
+
+CXXMethodTemplateRecord *APISet::addCXXMethodTemplate(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    FunctionSignature Signature, AccessControl Access, Template Template,
+    bool IsFromSystemHeader) {
+  auto *Record = addTopLevelRecord(USRBasedLookupTable, CXXMethodTemplates, USR,
+                                   Name, Loc, std::move(Availability), Comment,
+                                   Declaration, SubHeading, Signature, Access,
+                                   Template, IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Parent->USR, Parent->Name, Parent->getKind(), Parent);
+
+  return Record;
+}
+
+CXXMethodTemplateSpecializationRecord *APISet::addCXXMethodTemplateSpec(
+    APIRecord *Parent, StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    FunctionSignature Signature, AccessControl Access,
+    bool IsFromSystemHeader) {
+
+  auto *Record = addTopLevelRecord(
+      USRBasedLookupTable, CXXMethodTemplateSpecializations, USR, Name, Loc,
+      std::move(Availability), Comment, Declaration, SubHeading, Signature,
+      Access, IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Parent->USR, Parent->Name, Parent->getKind(), Parent);
+
+  return Record;
+}
+
+ObjCCategoryRecord *APISet::addObjCCategory(
+    StringRef Name, StringRef USR, PresumedLoc Loc,
+    AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    SymbolReference Interface, bool IsFromSystemHeader,
+    bool IsFromExternalModule) {
+  // Create the category record.
+  auto *Record =
+      addTopLevelRecord(USRBasedLookupTable, ObjCCategories, USR, Name, Loc,
+                        std::move(Availability), Comment, Declaration,
+                        SubHeading, Interface, IsFromSystemHeader);
+
+  Record->IsFromExternalModule = IsFromExternalModule;
+
+  auto It = ObjCInterfaces.find(Interface.USR);
+  if (It != ObjCInterfaces.end())
+    It->second->Categories.push_back(Record);
+
+  return Record;
+}
+
+ObjCInterfaceRecord *
+APISet::addObjCInterface(StringRef Name, StringRef USR, PresumedLoc Loc,
+                         AvailabilityInfo Availability, LinkageInfo Linkage,
+                         const DocComment &Comment,
+                         DeclarationFragments Declaration,
+                         DeclarationFragments SubHeading,
+                         SymbolReference SuperClass, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, ObjCInterfaces, USR, Name, Loc,
+                           std::move(Availability), Linkage, Comment,
+                           Declaration, SubHeading, SuperClass,
+                           IsFromSystemHeader);
+}
+
+ObjCMethodRecord *APISet::addObjCMethod(
+    ObjCContainerRecord *Container, StringRef Name, StringRef USR,
+    PresumedLoc Loc, AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    FunctionSignature Signature, bool IsInstanceMethod,
+    bool IsFromSystemHeader) {
+  std::unique_ptr<ObjCMethodRecord> Record;
+  if (IsInstanceMethod)
+    Record = std::make_unique<ObjCInstanceMethodRecord>(
+        USR, Name, Loc, std::move(Availability), Comment, Declaration,
+        SubHeading, Signature, IsFromSystemHeader);
+  else
+    Record = std::make_unique<ObjCClassMethodRecord>(
+        USR, Name, Loc, std::move(Availability), Comment, Declaration,
+        SubHeading, Signature, IsFromSystemHeader);
+
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Container->USR, Container->Name, Container->getKind(), Container);
+  USRBasedLookupTable.insert({USR, Record.get()});
+  return Container->Methods.emplace_back(std::move(Record)).get();
+}
+
+ObjCPropertyRecord *APISet::addObjCProperty(
+    ObjCContainerRecord *Container, StringRef Name, StringRef USR,
+    PresumedLoc Loc, AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    ObjCPropertyRecord::AttributeKind Attributes, StringRef GetterName,
+    StringRef SetterName, bool IsOptional, bool IsInstanceProperty,
+    bool IsFromSystemHeader) {
+  std::unique_ptr<ObjCPropertyRecord> Record;
+  if (IsInstanceProperty)
+    Record = std::make_unique<ObjCInstancePropertyRecord>(
+        USR, Name, Loc, std::move(Availability), Comment, Declaration,
+        SubHeading, Attributes, GetterName, SetterName, IsOptional,
+        IsFromSystemHeader);
+  else
+    Record = std::make_unique<ObjCClassPropertyRecord>(
+        USR, Name, Loc, std::move(Availability), Comment, Declaration,
+        SubHeading, Attributes, GetterName, SetterName, IsOptional,
+        IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Container->USR, Container->Name, Container->getKind(), Container);
+  USRBasedLookupTable.insert({USR, Record.get()});
+  return Container->Properties.emplace_back(std::move(Record)).get();
+}
+
+ObjCInstanceVariableRecord *APISet::addObjCInstanceVariable(
+    ObjCContainerRecord *Container, StringRef Name, StringRef USR,
+    PresumedLoc Loc, AvailabilityInfo Availability, const DocComment &Comment,
+    DeclarationFragments Declaration, DeclarationFragments SubHeading,
+    ObjCInstanceVariableRecord::AccessControl Access, bool IsFromSystemHeader) {
+  auto Record = std::make_unique<ObjCInstanceVariableRecord>(
+      USR, Name, Loc, std::move(Availability), Comment, Declaration, SubHeading,
+      Access, IsFromSystemHeader);
+  Record->ParentInformation = APIRecord::HierarchyInformation(
+      Container->USR, Container->Name, Container->getKind(), Container);
+  USRBasedLookupTable.insert({USR, Record.get()});
+  return Container->Ivars.emplace_back(std::move(Record)).get();
+}
+
+ObjCProtocolRecord *APISet::addObjCProtocol(StringRef Name, StringRef USR,
+                                            PresumedLoc Loc,
+                                            AvailabilityInfo Availability,
+                                            const DocComment &Comment,
+                                            DeclarationFragments Declaration,
+                                            DeclarationFragments SubHeading,
+                                            bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, ObjCProtocols, USR, Name, Loc,
+                           std::move(Availability), Comment, Declaration,
+                           SubHeading, IsFromSystemHeader);
+}
+
+MacroDefinitionRecord *
+APISet::addMacroDefinition(StringRef Name, StringRef USR, PresumedLoc Loc,
+                           DeclarationFragments Declaration,
+                           DeclarationFragments SubHeading,
+                           bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, Macros, USR, Name, Loc,
+                           Declaration, SubHeading, IsFromSystemHeader);
+}
+
+TypedefRecord *
+APISet::addTypedef(StringRef Name, StringRef USR, PresumedLoc Loc,
+                   AvailabilityInfo Availability, const DocComment &Comment,
+                   DeclarationFragments Declaration,
+                   DeclarationFragments SubHeading,
+                   SymbolReference UnderlyingType, bool IsFromSystemHeader) {
+  return addTopLevelRecord(USRBasedLookupTable, Typedefs, USR, Name, Loc,
+                           std::move(Availability), Comment, Declaration,
+                           SubHeading, UnderlyingType, IsFromSystemHeader);
+}
+
+APIRecord *APISet::findRecordForUSR(StringRef USR) const {
+  if (USR.empty())
+    return nullptr;
+
+  return USRBasedLookupTable.lookup(USR);
+}
+
+StringRef APISet::recordUSR(const Decl *D) {
+  SmallString<128> USR;
+  index::generateUSRForDecl(D, USR);
+  return copyString(USR);
+}
+
+StringRef APISet::recordUSRForMacro(StringRef Name, SourceLocation SL,
+                                    const SourceManager &SM) {
+  SmallString<128> USR;
+  index::generateUSRForMacro(Name, SL, SM, USR);
+  return copyString(USR);
+}
+
+StringRef APISet::copyString(StringRef String) {
+  if (String.empty())
+    return {};
+
+  // No need to allocate memory and copy if the string has already been stored.
+  if (StringAllocator.identifyObject(String.data()))
+    return String;
+
+  void *Ptr = StringAllocator.Allocate(String.size(), 1);
+  memcpy(Ptr, String.data(), String.size());
+  return StringRef(reinterpret_cast<const char *>(Ptr), String.size());
+}
+
+APIRecord::~APIRecord() {}
+ObjCContainerRecord::~ObjCContainerRecord() {}
+ObjCMethodRecord::~ObjCMethodRecord() {}
+ObjCPropertyRecord::~ObjCPropertyRecord() {}
+CXXMethodRecord::~CXXMethodRecord() {}
+
+void GlobalFunctionRecord::anchor() {}
+void GlobalVariableRecord::anchor() {}
+void EnumConstantRecord::anchor() {}
+void EnumRecord::anchor() {}
+void RecordFieldRecord::anchor() {}
+void RecordRecord::anchor() {}
+void CXXFieldRecord::anchor() {}
+void CXXClassRecord::anchor() {}
+void CXXConstructorRecord::anchor() {}
+void CXXDestructorRecord::anchor() {}
+void CXXInstanceMethodRecord::anchor() {}
+void CXXStaticMethodRecord::anchor() {}
+void ObjCInstancePropertyRecord::anchor() {}
+void ObjCClassPropertyRecord::anchor() {}
+void ObjCInstanceVariableRecord::anchor() {}
+void ObjCInstanceMethodRecord::anchor() {}
+void ObjCClassMethodRecord::anchor() {}
+void ObjCCategoryRecord::anchor() {}
+void ObjCInterfaceRecord::anchor() {}
+void ObjCProtocolRecord::anchor() {}
+void MacroDefinitionRecord::anchor() {}
+void TypedefRecord::anchor() {}