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 Extra = FriendTypeTPLists.size() * sizeof(TemplateParameterList*);
50 FriendDecl *FD = new (C, DC, Extra) FriendDecl(DC, L, Friend, FriendL,
51 FriendTypeTPLists);
52 cast<CXXRecordDecl>(DC)->pushFriendDecl(FD);
53 return FD;
54 }
55
CreateDeserialized(ASTContext & C,unsigned ID,unsigned FriendTypeNumTPLists)56 FriendDecl *FriendDecl::CreateDeserialized(ASTContext &C, unsigned ID,
57 unsigned FriendTypeNumTPLists) {
58 std::size_t Extra = FriendTypeNumTPLists * sizeof(TemplateParameterList*);
59 return new (C, ID, Extra) FriendDecl(EmptyShell(), FriendTypeNumTPLists);
60 }
61
getFirstFriend() const62 FriendDecl *CXXRecordDecl::getFirstFriend() const {
63 ExternalASTSource *Source = getParentASTContext().getExternalSource();
64 Decl *First = data().FirstFriend.get(Source);
65 return First ? cast<FriendDecl>(First) : nullptr;
66 }
67