//===- MultiplexConsumer.cpp - AST Consumer for PCH Generation --*- 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

//

//===----------------------------------------------------------------------===//

//

//  This file defines the MultiplexConsumer class. It also declares and defines

//  MultiplexASTDeserializationListener and  MultiplexASTMutationListener, which

//  are implementation details of MultiplexConsumer.

//

//===----------------------------------------------------------------------===//

#include "clang/Frontend/MultiplexConsumer.h"

#include "clang/AST/ASTMutationListener.h"

#include "clang/AST/DeclGroup.h"

using namespace clang;

namespace clang {

MultiplexASTDeserializationListener::MultiplexASTDeserializationListener(

      const std::vector<ASTDeserializationListener*>& L)

    : Listeners(L) {

}

void MultiplexASTDeserializationListener::ReaderInitialized(

    ASTReader *Reader) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->ReaderInitialized(Reader);

}

void MultiplexASTDeserializationListener::IdentifierRead(

    serialization::IdentID ID, IdentifierInfo *II) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->IdentifierRead(ID, II);

}

void MultiplexASTDeserializationListener::MacroRead(

    serialization::MacroID ID, MacroInfo *MI) {

  for (auto &Listener : Listeners)

    Listener->MacroRead(ID, MI);

}

void MultiplexASTDeserializationListener::TypeRead(

    serialization::TypeIdx Idx, QualType T) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->TypeRead(Idx, T);

}

void MultiplexASTDeserializationListener::DeclRead(

    serialization::DeclID ID, const Decl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DeclRead(ID, D);

}

void MultiplexASTDeserializationListener::SelectorRead(

    serialization::SelectorID ID, Selector Sel) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->SelectorRead(ID, Sel);

}

void MultiplexASTDeserializationListener::MacroDefinitionRead(

    serialization::PreprocessedEntityID ID, MacroDefinitionRecord *MD) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->MacroDefinitionRead(ID, MD);

}

void MultiplexASTDeserializationListener::ModuleRead(

    serialization::SubmoduleID ID, Module *Mod) {

  for (auto &Listener : Listeners)

    Listener->ModuleRead(ID, Mod);

}

void MultiplexASTDeserializationListener::ModuleImportRead(

    serialization::SubmoduleID ID, SourceLocation ImportLoc) {

  for (auto &Listener : Listeners)

    Listener->ModuleImportRead(ID, ImportLoc);

}

// This ASTMutationListener forwards its notifications to a set of

// child listeners.

class MultiplexASTMutationListener : public ASTMutationListener {

public:

  // Does NOT take ownership of the elements in L.

  MultiplexASTMutationListener(ArrayRef<ASTMutationListener*> L);

  void CompletedTagDefinition(const TagDecl *D) override;

  void AddedVisibleDecl(const DeclContext *DC, const Decl *D) override;

  void AddedCXXImplicitMember(const CXXRecordDecl *RD, const Decl *D) override;

  void AddedCXXTemplateSpecialization(const ClassTemplateDecl *TD,

                            const ClassTemplateSpecializationDecl *D) override;

  void AddedCXXTemplateSpecialization(const VarTemplateDecl *TD,

                               const VarTemplateSpecializationDecl *D) override;

  void AddedCXXTemplateSpecialization(const FunctionTemplateDecl *TD,

                                      const FunctionDecl *D) override;

  void ResolvedExceptionSpec(const FunctionDecl *FD) override;

  void DeducedReturnType(const FunctionDecl *FD, QualType ReturnType) override;

  void ResolvedOperatorDelete(const CXXDestructorDecl *DD,

                              const FunctionDecl *Delete,

                              Expr *ThisArg) override;

  void CompletedImplicitDefinition(const FunctionDecl *D) override;

  void InstantiationRequested(const ValueDecl *D) override;

  void VariableDefinitionInstantiated(const VarDecl *D) override;

  void FunctionDefinitionInstantiated(const FunctionDecl *D) override;

  void DefaultArgumentInstantiated(const ParmVarDecl *D) override;

  void DefaultMemberInitializerInstantiated(const FieldDecl *D) override;

  void AddedObjCCategoryToInterface(const ObjCCategoryDecl *CatD,

                                    const ObjCInterfaceDecl *IFD) override;

  void DeclarationMarkedUsed(const Decl *D) override;

  void DeclarationMarkedOpenMPThreadPrivate(const Decl *D) override;

  void DeclarationMarkedOpenMPAllocate(const Decl *D, const Attr *A) override;

  void DeclarationMarkedOpenMPDeclareTarget(const Decl *D,

                                            const Attr *Attr) override;

  void RedefinedHiddenDefinition(const NamedDecl *D, Module *M) override;

  void AddedAttributeToRecord(const Attr *Attr,

                              const RecordDecl *Record) override;

private:

  std::vector<ASTMutationListener*> Listeners;

};

MultiplexASTMutationListener::MultiplexASTMutationListener(

    ArrayRef<ASTMutationListener*> L)

    : Listeners(L.begin(), L.end()) {

}

void MultiplexASTMutationListener::CompletedTagDefinition(const TagDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->CompletedTagDefinition(D);

}

void MultiplexASTMutationListener::AddedVisibleDecl(

    const DeclContext *DC, const Decl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedVisibleDecl(DC, D);

}

void MultiplexASTMutationListener::AddedCXXImplicitMember(

    const CXXRecordDecl *RD, const Decl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedCXXImplicitMember(RD, D);

}

void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(

    const ClassTemplateDecl *TD, const ClassTemplateSpecializationDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedCXXTemplateSpecialization(TD, D);

}

void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(

    const VarTemplateDecl *TD, const VarTemplateSpecializationDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedCXXTemplateSpecialization(TD, D);

}

void MultiplexASTMutationListener::AddedCXXTemplateSpecialization(

    const FunctionTemplateDecl *TD, const FunctionDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedCXXTemplateSpecialization(TD, D);

}

void MultiplexASTMutationListener::ResolvedExceptionSpec(

    const FunctionDecl *FD) {

  for (auto &Listener : Listeners)

    Listener->ResolvedExceptionSpec(FD);

}

void MultiplexASTMutationListener::DeducedReturnType(const FunctionDecl *FD,

                                                     QualType ReturnType) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DeducedReturnType(FD, ReturnType);

}

void MultiplexASTMutationListener::ResolvedOperatorDelete(

    const CXXDestructorDecl *DD, const FunctionDecl *Delete, Expr *ThisArg) {

  for (auto *L : Listeners)

    L->ResolvedOperatorDelete(DD, Delete, ThisArg);

}

void MultiplexASTMutationListener::CompletedImplicitDefinition(

                                                        const FunctionDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->CompletedImplicitDefinition(D);

}

void MultiplexASTMutationListener::InstantiationRequested(const ValueDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->InstantiationRequested(D);

}

void MultiplexASTMutationListener::VariableDefinitionInstantiated(

    const VarDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->VariableDefinitionInstantiated(D);

}

void MultiplexASTMutationListener::FunctionDefinitionInstantiated(

    const FunctionDecl *D) {

  for (auto &Listener : Listeners)

    Listener->FunctionDefinitionInstantiated(D);

}

void MultiplexASTMutationListener::DefaultArgumentInstantiated(

                                                         const ParmVarDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DefaultArgumentInstantiated(D);

}

void MultiplexASTMutationListener::DefaultMemberInitializerInstantiated(

                                                           const FieldDecl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DefaultMemberInitializerInstantiated(D);

}

void MultiplexASTMutationListener::AddedObjCCategoryToInterface(

                                                 const ObjCCategoryDecl *CatD,

                                                 const ObjCInterfaceDecl *IFD) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->AddedObjCCategoryToInterface(CatD, IFD);

}

void MultiplexASTMutationListener::DeclarationMarkedUsed(const Decl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DeclarationMarkedUsed(D);

}

void MultiplexASTMutationListener::DeclarationMarkedOpenMPThreadPrivate(

    const Decl *D) {

  for (size_t i = 0, e = Listeners.size(); i != e; ++i)

    Listeners[i]->DeclarationMarkedOpenMPThreadPrivate(D);

}

void MultiplexASTMutationListener::DeclarationMarkedOpenMPAllocate(

    const Decl *D, const Attr *A) {

  for (ASTMutationListener *L : Listeners)

    L->DeclarationMarkedOpenMPAllocate(D, A);

}

void MultiplexASTMutationListener::DeclarationMarkedOpenMPDeclareTarget(

    const Decl *D, const Attr *Attr) {

  for (auto *L : Listeners)

    L->DeclarationMarkedOpenMPDeclareTarget(D, Attr);

}

void MultiplexASTMutationListener::RedefinedHiddenDefinition(const NamedDecl *D,

                                                             Module *M) {

  for (auto *L : Listeners)

    L->RedefinedHiddenDefinition(D, M);

}

void MultiplexASTMutationListener::AddedAttributeToRecord(

                                                    const Attr *Attr,

                                                    const RecordDecl *Record) {

  for (auto *L : Listeners)

    L->AddedAttributeToRecord(Attr, Record);

}

}  // end namespace clang

MultiplexConsumer::MultiplexConsumer(

    std::vector<std::unique_ptr<ASTConsumer>> C)

    : Consumers(std::move(C)) {

  // Collect the mutation listeners and deserialization listeners of all

  // children, and create a multiplex listener each if so.

  std::vector<ASTMutationListener *> mutationListeners;

  std::vector<ASTDeserializationListener*> serializationListeners;

  for (auto &Consumer : Consumers) {

    if (auto *mutationListener = Consumer->GetASTMutationListener())

      mutationListeners.push_back(mutationListener);

    if (auto *serializationListener = Consumer->GetASTDeserializationListener())

      serializationListeners.push_back(serializationListener);

  }

  if (!mutationListeners.empty()) {

    MutationListener =

        std::make_unique<MultiplexASTMutationListener>(mutationListeners);

  }

  if (!serializationListeners.empty()) {

    DeserializationListener =

        std::make_unique<MultiplexASTDeserializationListener>(

            serializationListeners);

  }

}

MultiplexConsumer::~MultiplexConsumer() {}

void MultiplexConsumer::Initialize(ASTContext &Context) {

  for (auto &Consumer : Consumers)

    Consumer->Initialize(Context);

}

bool MultiplexConsumer::HandleTopLevelDecl(DeclGroupRef D) {

  bool Continue = true;

  for (auto &Consumer : Consumers)

    Continue = Continue && Consumer->HandleTopLevelDecl(D);

  return Continue;

}

void MultiplexConsumer::HandleInlineFunctionDefinition(FunctionDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleInlineFunctionDefinition(D);

}

void MultiplexConsumer::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) {

  for (auto &Consumer : Consumers)

    Consumer->HandleCXXStaticMemberVarInstantiation(VD);

}

void MultiplexConsumer::HandleInterestingDecl(DeclGroupRef D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleInterestingDecl(D);

}

void MultiplexConsumer::HandleTranslationUnit(ASTContext &Ctx) {

  for (auto &Consumer : Consumers)

    Consumer->HandleTranslationUnit(Ctx);

}

void MultiplexConsumer::HandleTagDeclDefinition(TagDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleTagDeclDefinition(D);

}

void MultiplexConsumer::HandleTagDeclRequiredDefinition(const TagDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleTagDeclRequiredDefinition(D);

}

void MultiplexConsumer::HandleCXXImplicitFunctionInstantiation(FunctionDecl *D){

  for (auto &Consumer : Consumers)

    Consumer->HandleCXXImplicitFunctionInstantiation(D);

}

void MultiplexConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleTopLevelDeclInObjCContainer(D);

}

void MultiplexConsumer::HandleImplicitImportDecl(ImportDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->HandleImplicitImportDecl(D);

}

void MultiplexConsumer::CompleteTentativeDefinition(VarDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->CompleteTentativeDefinition(D);

}

void MultiplexConsumer::CompleteExternalDeclaration(VarDecl *D) {

  for (auto &Consumer : Consumers)

    Consumer->CompleteExternalDeclaration(D);

}

void MultiplexConsumer::AssignInheritanceModel(CXXRecordDecl *RD) {

  for (auto &Consumer : Consumers)

    Consumer->AssignInheritanceModel(RD);

}

void MultiplexConsumer::HandleVTable(CXXRecordDecl *RD) {

  for (auto &Consumer : Consumers)

    Consumer->HandleVTable(RD);

}

ASTMutationListener *MultiplexConsumer::GetASTMutationListener() {

  return MutationListener.get();

}

ASTDeserializationListener *MultiplexConsumer::GetASTDeserializationListener() {

  return DeserializationListener.get();

}

void MultiplexConsumer::PrintStats() {

  for (auto &Consumer : Consumers)

    Consumer->PrintStats();

}

bool MultiplexConsumer::shouldSkipFunctionBody(Decl *D) {

  bool Skip = true;

  for (auto &Consumer : Consumers)

    Skip = Skip && Consumer->shouldSkipFunctionBody(D);

  return Skip;

}

void MultiplexConsumer::InitializeSema(Sema &S) {

  for (auto &Consumer : Consumers)

    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer.get()))

      SC->InitializeSema(S);

}

void MultiplexConsumer::ForgetSema() {

  for (auto &Consumer : Consumers)

    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer.get()))

      SC->ForgetSema();

}