1 //===--- DeclFriend.cpp - C++ Friend Declaration AST Node Implementation --===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the AST classes related to C++ friend
11 // declarations.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclFriend.h"
17 #include "clang/AST/DeclTemplate.h"
18 using namespace clang;
19
anchor()20 void FriendDecl::anchor() { }
21
getNextFriendSlowCase()22 FriendDecl *FriendDecl::getNextFriendSlowCase() {
23 return cast_or_null<FriendDecl>(
24 NextFriend.get(getASTContext().getExternalSource()));
25 }
26
Create(ASTContext & C,DeclContext * DC,SourceLocation L,FriendUnion Friend,SourceLocation FriendL,ArrayRef<TemplateParameterList * > FriendTypeTPLists)27 FriendDecl *FriendDecl::Create(ASTContext &C, DeclContext *DC,
28 SourceLocation L,
29 FriendUnion Friend,
30 SourceLocation FriendL,
31 ArrayRef<TemplateParameterList*> FriendTypeTPLists) {
32 #ifndef NDEBUG
33 if (Friend.is<NamedDecl*>()) {
34 NamedDecl *D = Friend.get<NamedDecl*>();
35 assert(isa<FunctionDecl>(D) ||
36 isa<CXXRecordDecl>(D) ||
37 isa<FunctionTemplateDecl>(D) ||
38 isa<ClassTemplateDecl>(D));
39
40 // As a temporary hack, we permit template instantiation to point
41 // to the original declaration when instantiating members.
42 assert(D->getFriendObjectKind() ||
43 (cast<CXXRecordDecl>(DC)->getTemplateSpecializationKind()));
44 // These template parameters are for friend types only.
45 assert(FriendTypeTPLists.size() == 0);
46 }
47 #endif
48
49 std::size_t Size = sizeof(FriendDecl)
50 + FriendTypeTPLists.size() * sizeof(TemplateParameterList*);
51 void *Mem = C.Allocate(Size);
52 FriendDecl *FD = new (Mem) FriendDecl(DC, L, Friend, FriendL,
53 FriendTypeTPLists);
54 cast<CXXRecordDecl>(DC)->pushFriendDecl(FD);
55 return FD;
56 }
57
CreateDeserialized(ASTContext & C,unsigned ID,unsigned FriendTypeNumTPLists)58 FriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, unsigned ID,
59 unsigned FriendTypeNumTPLists) {
60 std::size_t Size = sizeof(FriendDecl)
61 + FriendTypeNumTPLists * sizeof(TemplateParameterList*);
62 void *Mem = AllocateDeserializedDecl(C, ID, Size);
63 return new (Mem) FriendDecl(EmptyShell(), FriendTypeNumTPLists);
64 }
65
getFirstFriend() const66 FriendDecl *CXXRecordDecl::getFirstFriend() const {
67 ExternalASTSource *Source = getParentASTContext().getExternalSource();
68 Decl *First = data().FirstFriend.get(Source);
69 return First ? cast<FriendDecl>(First) : 0;
70 }
71