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//===- DeclFriend.cpp - C++ Friend Declaration AST Node Implementation ----===//
//
// 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 implements the AST classes related to C++ friend
// declarations.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DeclFriend.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/Basic/LLVM.h"
#include "llvm/Support/Casting.h"
#include <cassert>
#include <cstddef>
using namespace clang;
void FriendDecl::anchor() {}
FriendDecl *FriendDecl::getNextFriendSlowCase() {
return cast_or_null<FriendDecl>(
NextFriend.get(getASTContext().getExternalSource()));
}
FriendDecl *FriendDecl::Create(ASTContext &C, DeclContext *DC,
SourceLocation L,
FriendUnion Friend,
SourceLocation FriendL,
ArrayRef<TemplateParameterList *> FriendTypeTPLists) {
#ifndef NDEBUG
if (Friend.is<NamedDecl *>()) {
const auto *D = Friend.get<NamedDecl*>();
assert(isa<FunctionDecl>(D) ||
isa<CXXRecordDecl>(D) ||
isa<FunctionTemplateDecl>(D) ||
isa<ClassTemplateDecl>(D));
// As a temporary hack, we permit template instantiation to point
// to the original declaration when instantiating members.
assert(D->getFriendObjectKind() ||
(cast<CXXRecordDecl>(DC)->getTemplateSpecializationKind()));
// These template parameters are for friend types only.
assert(FriendTypeTPLists.empty());
}
#endif
std::size_t Extra =
FriendDecl::additionalSizeToAlloc<TemplateParameterList *>(
FriendTypeTPLists.size());
auto *FD = new (C, DC, Extra) FriendDecl(DC, L, Friend, FriendL,
FriendTypeTPLists);
cast<CXXRecordDecl>(DC)->pushFriendDecl(FD);
return FD;
}
FriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, unsigned ID,
unsigned FriendTypeNumTPLists) {
std::size_t Extra =
additionalSizeToAlloc<TemplateParameterList *>(FriendTypeNumTPLists);
return new (C, ID, Extra) FriendDecl(EmptyShell(), FriendTypeNumTPLists);
}
FriendDecl *CXXRecordDecl::getFirstFriend() const {
ExternalASTSource *Source = getParentASTContext().getExternalSource();
Decl *First = data().FirstFriend.get(Source);
return First ? cast<FriendDecl>(First) : nullptr;
}
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