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 20 void FriendDecl::anchor() { } 21 22 FriendDecl *FriendDecl::getNextFriendSlowCase() { 23 return cast_or_null<FriendDecl>( 24 NextFriend.get(getASTContext().getExternalSource())); 25 } 26 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 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 66 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
