10b57cec5SDimitry Andric //===- DeclFriend.cpp - C++ Friend Declaration AST Node Implementation ----===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file implements the AST classes related to C++ friend 100b57cec5SDimitry Andric // declarations. 110b57cec5SDimitry Andric // 120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric #include "clang/AST/DeclFriend.h" 150b57cec5SDimitry Andric #include "clang/AST/Decl.h" 160b57cec5SDimitry Andric #include "clang/AST/DeclBase.h" 170b57cec5SDimitry Andric #include "clang/AST/DeclCXX.h" 180b57cec5SDimitry Andric #include "clang/AST/ASTContext.h" 190b57cec5SDimitry Andric #include "clang/AST/DeclTemplate.h" 200b57cec5SDimitry Andric #include "clang/Basic/LLVM.h" 210b57cec5SDimitry Andric #include "llvm/Support/Casting.h" 220b57cec5SDimitry Andric #include <cassert> 230b57cec5SDimitry Andric #include <cstddef> 240b57cec5SDimitry Andric 250b57cec5SDimitry Andric using namespace clang; 260b57cec5SDimitry Andric 270b57cec5SDimitry Andric void FriendDecl::anchor() {} 280b57cec5SDimitry Andric 290b57cec5SDimitry Andric FriendDecl *FriendDecl::getNextFriendSlowCase() { 300b57cec5SDimitry Andric return cast_or_null<FriendDecl>( 310b57cec5SDimitry Andric NextFriend.get(getASTContext().getExternalSource())); 320b57cec5SDimitry Andric } 330b57cec5SDimitry Andric 340b57cec5SDimitry Andric FriendDecl *FriendDecl::Create(ASTContext &C, DeclContext *DC, 350b57cec5SDimitry Andric SourceLocation L, 360b57cec5SDimitry Andric FriendUnion Friend, 370b57cec5SDimitry Andric SourceLocation FriendL, 380b57cec5SDimitry Andric ArrayRef<TemplateParameterList *> FriendTypeTPLists) { 390b57cec5SDimitry Andric #ifndef NDEBUG 400b57cec5SDimitry Andric if (Friend.is<NamedDecl *>()) { 410b57cec5SDimitry Andric const auto *D = Friend.get<NamedDecl*>(); 420b57cec5SDimitry Andric assert(isa<FunctionDecl>(D) || 430b57cec5SDimitry Andric isa<CXXRecordDecl>(D) || 440b57cec5SDimitry Andric isa<FunctionTemplateDecl>(D) || 450b57cec5SDimitry Andric isa<ClassTemplateDecl>(D)); 460b57cec5SDimitry Andric 470b57cec5SDimitry Andric // As a temporary hack, we permit template instantiation to point 480b57cec5SDimitry Andric // to the original declaration when instantiating members. 490b57cec5SDimitry Andric assert(D->getFriendObjectKind() || 500b57cec5SDimitry Andric (cast<CXXRecordDecl>(DC)->getTemplateSpecializationKind())); 510b57cec5SDimitry Andric // These template parameters are for friend types only. 520b57cec5SDimitry Andric assert(FriendTypeTPLists.empty()); 530b57cec5SDimitry Andric } 540b57cec5SDimitry Andric #endif 550b57cec5SDimitry Andric 560b57cec5SDimitry Andric std::size_t Extra = 570b57cec5SDimitry Andric FriendDecl::additionalSizeToAlloc<TemplateParameterList *>( 580b57cec5SDimitry Andric FriendTypeTPLists.size()); 590b57cec5SDimitry Andric auto *FD = new (C, DC, Extra) FriendDecl(DC, L, Friend, FriendL, 600b57cec5SDimitry Andric FriendTypeTPLists); 610b57cec5SDimitry Andric cast<CXXRecordDecl>(DC)->pushFriendDecl(FD); 620b57cec5SDimitry Andric return FD; 630b57cec5SDimitry Andric } 640b57cec5SDimitry Andric 65*0fca6ea1SDimitry Andric FriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, GlobalDeclID ID, 660b57cec5SDimitry Andric unsigned FriendTypeNumTPLists) { 670b57cec5SDimitry Andric std::size_t Extra = 680b57cec5SDimitry Andric additionalSizeToAlloc<TemplateParameterList *>(FriendTypeNumTPLists); 690b57cec5SDimitry Andric return new (C, ID, Extra) FriendDecl(EmptyShell(), FriendTypeNumTPLists); 700b57cec5SDimitry Andric } 710b57cec5SDimitry Andric 720b57cec5SDimitry Andric FriendDecl *CXXRecordDecl::getFirstFriend() const { 730b57cec5SDimitry Andric ExternalASTSource *Source = getParentASTContext().getExternalSource(); 740b57cec5SDimitry Andric Decl *First = data().FirstFriend.get(Source); 750b57cec5SDimitry Andric return First ? cast<FriendDecl>(First) : nullptr; 760b57cec5SDimitry Andric } 77