75 lines · cpp
1//===- DeclFriend.cpp - C++ Friend Declaration AST Node Implementation ----===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements the AST classes related to C++ friend10// declarations.11//12//===----------------------------------------------------------------------===//13 14#include "clang/AST/DeclFriend.h"15#include "clang/AST/ASTContext.h"16#include "clang/AST/Decl.h"17#include "clang/AST/DeclBase.h"18#include "clang/AST/DeclCXX.h"19#include "clang/AST/DeclTemplate.h"20#include "clang/Basic/LLVM.h"21#include <cassert>22#include <cstddef>23 24using namespace clang;25 26void FriendDecl::anchor() {}27 28FriendDecl *FriendDecl::getNextFriendSlowCase() {29 return cast_or_null<FriendDecl>(30 NextFriend.get(getASTContext().getExternalSource()));31}32 33FriendDecl *34FriendDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,35 FriendUnion Friend, SourceLocation FriendL,36 SourceLocation EllipsisLoc,37 ArrayRef<TemplateParameterList *> FriendTypeTPLists) {38#ifndef NDEBUG39 if (const auto *D = dyn_cast<NamedDecl *>(Friend)) {40 assert(isa<FunctionDecl>(D) ||41 isa<CXXRecordDecl>(D) ||42 isa<FunctionTemplateDecl>(D) ||43 isa<ClassTemplateDecl>(D));44 45 // As a temporary hack, we permit template instantiation to point46 // to the original declaration when instantiating members.47 assert(D->getFriendObjectKind() ||48 (cast<CXXRecordDecl>(DC)->getTemplateSpecializationKind()));49 // These template parameters are for friend types only.50 assert(FriendTypeTPLists.empty());51 }52#endif53 54 std::size_t Extra =55 FriendDecl::additionalSizeToAlloc<TemplateParameterList *>(56 FriendTypeTPLists.size());57 auto *FD = new (C, DC, Extra)58 FriendDecl(DC, L, Friend, FriendL, EllipsisLoc, FriendTypeTPLists);59 cast<CXXRecordDecl>(DC)->pushFriendDecl(FD);60 return FD;61}62 63FriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, GlobalDeclID ID,64 unsigned FriendTypeNumTPLists) {65 std::size_t Extra =66 additionalSizeToAlloc<TemplateParameterList *>(FriendTypeNumTPLists);67 return new (C, ID, Extra) FriendDecl(EmptyShell(), FriendTypeNumTPLists);68}69 70FriendDecl *CXXRecordDecl::getFirstFriend() const {71 ExternalASTSource *Source = getParentASTContext().getExternalSource();72 Decl *First = data().FirstFriend.get(Source);73 return First ? cast<FriendDecl>(First) : nullptr;74}75