1205219Srdivacky//===--- DeclFriend.cpp - C++ Friend Declaration AST Node Implementation --===//
2205219Srdivacky//
3205219Srdivacky//                     The LLVM Compiler Infrastructure
4205219Srdivacky//
5205219Srdivacky// This file is distributed under the University of Illinois Open Source
6205219Srdivacky// License. See LICENSE.TXT for details.
7205219Srdivacky//
8205219Srdivacky//===----------------------------------------------------------------------===//
9205219Srdivacky//
10205219Srdivacky// This file implements the AST classes related to C++ friend
11205219Srdivacky// declarations.
12205219Srdivacky//
13205219Srdivacky//===----------------------------------------------------------------------===//
14205219Srdivacky
15245431Sdim#include "clang/AST/ASTContext.h"
16205219Srdivacky#include "clang/AST/DeclFriend.h"
17205219Srdivacky#include "clang/AST/DeclTemplate.h"
18205219Srdivackyusing namespace clang;
19205219Srdivacky
20235633Sdimvoid FriendDecl::anchor() { }
21235633Sdim
22245431SdimFriendDecl *FriendDecl::getNextFriendSlowCase() {
23245431Sdim  return cast_or_null<FriendDecl>(
24245431Sdim                           NextFriend.get(getASTContext().getExternalSource()));
25245431Sdim}
26245431Sdim
27205219SrdivackyFriendDecl *FriendDecl::Create(ASTContext &C, DeclContext *DC,
28205219Srdivacky                               SourceLocation L,
29205219Srdivacky                               FriendUnion Friend,
30252723Sdim                               SourceLocation FriendL,
31252723Sdim                        ArrayRef<TemplateParameterList*> FriendTypeTPLists) {
32205219Srdivacky#ifndef NDEBUG
33205219Srdivacky  if (Friend.is<NamedDecl*>()) {
34205219Srdivacky    NamedDecl *D = Friend.get<NamedDecl*>();
35205219Srdivacky    assert(isa<FunctionDecl>(D) ||
36205219Srdivacky           isa<CXXRecordDecl>(D) ||
37205219Srdivacky           isa<FunctionTemplateDecl>(D) ||
38205219Srdivacky           isa<ClassTemplateDecl>(D));
39205219Srdivacky
40205219Srdivacky    // As a temporary hack, we permit template instantiation to point
41205219Srdivacky    // to the original declaration when instantiating members.
42205219Srdivacky    assert(D->getFriendObjectKind() ||
43205219Srdivacky           (cast<CXXRecordDecl>(DC)->getTemplateSpecializationKind()));
44252723Sdim    // These template parameters are for friend types only.
45252723Sdim    assert(FriendTypeTPLists.size() == 0);
46205219Srdivacky  }
47205219Srdivacky#endif
48205219Srdivacky
49252723Sdim  std::size_t Size = sizeof(FriendDecl)
50252723Sdim    + FriendTypeTPLists.size() * sizeof(TemplateParameterList*);
51252723Sdim  void *Mem = C.Allocate(Size);
52252723Sdim  FriendDecl *FD = new (Mem) FriendDecl(DC, L, Friend, FriendL,
53252723Sdim                                        FriendTypeTPLists);
54205219Srdivacky  cast<CXXRecordDecl>(DC)->pushFriendDecl(FD);
55205219Srdivacky  return FD;
56205219Srdivacky}
57210299Sed
58252723SdimFriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, unsigned ID,
59252723Sdim                                           unsigned FriendTypeNumTPLists) {
60252723Sdim  std::size_t Size = sizeof(FriendDecl)
61252723Sdim    + FriendTypeNumTPLists * sizeof(TemplateParameterList*);
62252723Sdim  void *Mem = AllocateDeserializedDecl(C, ID, Size);
63252723Sdim  return new (Mem) FriendDecl(EmptyShell(), FriendTypeNumTPLists);
64210299Sed}
65252723Sdim
66263509SdimFriendDecl *CXXRecordDecl::getFirstFriend() const {
67263509Sdim  ExternalASTSource *Source = getParentASTContext().getExternalSource();
68263509Sdim  Decl *First = data().FirstFriend.get(Source);
69263509Sdim  return First ? cast<FriendDecl>(First) : 0;
70263509Sdim}
71