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-rw-r--r--include/clang/AST/DeclFriend.h243
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diff --git a/include/clang/AST/DeclFriend.h b/include/clang/AST/DeclFriend.h
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--- a/include/clang/AST/DeclFriend.h
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-//===-- DeclFriend.h - Classes for C++ friend declarations -*- C++ -*------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the section of the AST representing C++ friend
-// declarations.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_AST_DECLFRIEND_H
-#define LLVM_CLANG_AST_DECLFRIEND_H
-
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclTemplate.h"
-#include "clang/AST/TypeLoc.h"
-#include "llvm/Support/Compiler.h"
-
-namespace clang {
-
-/// FriendDecl - Represents the declaration of a friend entity,
-/// which can be a function, a type, or a templated function or type.
-// For example:
-///
-/// @code
-/// template <typename T> class A {
-/// friend int foo(T);
-/// friend class B;
-/// friend T; // only in C++0x
-/// template <typename U> friend class C;
-/// template <typename U> friend A& operator+=(A&, const U&) { ... }
-/// };
-/// @endcode
-///
-/// The semantic context of a friend decl is its declaring class.
-class FriendDecl final
- : public Decl,
- private llvm::TrailingObjects<FriendDecl, TemplateParameterList *> {
- virtual void anchor();
-public:
- typedef llvm::PointerUnion<NamedDecl*,TypeSourceInfo*> FriendUnion;
-
-private:
- // The declaration that's a friend of this class.
- FriendUnion Friend;
-
- // A pointer to the next friend in the sequence.
- LazyDeclPtr NextFriend;
-
- // Location of the 'friend' specifier.
- SourceLocation FriendLoc;
-
- /// True if this 'friend' declaration is unsupported. Eventually we
- /// will support every possible friend declaration, but for now we
- /// silently ignore some and set this flag to authorize all access.
- bool UnsupportedFriend : 1;
-
- // The number of "outer" template parameter lists in non-templatic
- // (currently unsupported) friend type declarations, such as
- // template <class T> friend class A<T>::B;
- unsigned NumTPLists : 31;
-
- friend class CXXRecordDecl::friend_iterator;
- friend class CXXRecordDecl;
-
- FriendDecl(DeclContext *DC, SourceLocation L, FriendUnion Friend,
- SourceLocation FriendL,
- ArrayRef<TemplateParameterList*> FriendTypeTPLists)
- : Decl(Decl::Friend, DC, L),
- Friend(Friend),
- NextFriend(),
- FriendLoc(FriendL),
- UnsupportedFriend(false),
- NumTPLists(FriendTypeTPLists.size()) {
- for (unsigned i = 0; i < NumTPLists; ++i)
- getTrailingObjects<TemplateParameterList *>()[i] = FriendTypeTPLists[i];
- }
-
- FriendDecl(EmptyShell Empty, unsigned NumFriendTypeTPLists)
- : Decl(Decl::Friend, Empty), NextFriend(),
- NumTPLists(NumFriendTypeTPLists) { }
-
- FriendDecl *getNextFriend() {
- if (!NextFriend.isOffset())
- return cast_or_null<FriendDecl>(NextFriend.get(nullptr));
- return getNextFriendSlowCase();
- }
- FriendDecl *getNextFriendSlowCase();
-
-public:
- static FriendDecl *Create(ASTContext &C, DeclContext *DC,
- SourceLocation L, FriendUnion Friend_,
- SourceLocation FriendL,
- ArrayRef<TemplateParameterList*> FriendTypeTPLists
- = None);
- static FriendDecl *CreateDeserialized(ASTContext &C, unsigned ID,
- unsigned FriendTypeNumTPLists);
-
- /// If this friend declaration names an (untemplated but possibly
- /// dependent) type, return the type; otherwise return null. This
- /// is used for elaborated-type-specifiers and, in C++0x, for
- /// arbitrary friend type declarations.
- TypeSourceInfo *getFriendType() const {
- return Friend.dyn_cast<TypeSourceInfo*>();
- }
- unsigned getFriendTypeNumTemplateParameterLists() const {
- return NumTPLists;
- }
- TemplateParameterList *getFriendTypeTemplateParameterList(unsigned N) const {
- assert(N < NumTPLists);
- return getTrailingObjects<TemplateParameterList *>()[N];
- }
-
- /// If this friend declaration doesn't name a type, return the inner
- /// declaration.
- NamedDecl *getFriendDecl() const {
- return Friend.dyn_cast<NamedDecl*>();
- }
-
- /// Retrieves the location of the 'friend' keyword.
- SourceLocation getFriendLoc() const {
- return FriendLoc;
- }
-
- /// Retrieves the source range for the friend declaration.
- SourceRange getSourceRange() const override LLVM_READONLY {
- if (NamedDecl *ND = getFriendDecl()) {
- if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND))
- return FD->getSourceRange();
- if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND))
- return FTD->getSourceRange();
- if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(ND))
- return CTD->getSourceRange();
- if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(ND)) {
- if (DD->getOuterLocStart() != DD->getInnerLocStart())
- return DD->getSourceRange();
- }
- return SourceRange(getFriendLoc(), ND->getLocEnd());
- }
- else if (TypeSourceInfo *TInfo = getFriendType()) {
- SourceLocation StartL =
- (NumTPLists == 0) ? getFriendLoc()
- : getTrailingObjects<TemplateParameterList *>()[0]
- ->getTemplateLoc();
- return SourceRange(StartL, TInfo->getTypeLoc().getEndLoc());
- }
- else
- return SourceRange(getFriendLoc(), getLocation());
- }
-
- /// Determines if this friend kind is unsupported.
- bool isUnsupportedFriend() const {
- return UnsupportedFriend;
- }
- void setUnsupportedFriend(bool Unsupported) {
- UnsupportedFriend = Unsupported;
- }
-
- // Implement isa/cast/dyncast/etc.
- static bool classof(const Decl *D) { return classofKind(D->getKind()); }
- static bool classofKind(Kind K) { return K == Decl::Friend; }
-
- friend class ASTDeclReader;
- friend class ASTDeclWriter;
- friend TrailingObjects;
-};
-
-/// An iterator over the friend declarations of a class.
-class CXXRecordDecl::friend_iterator {
- FriendDecl *Ptr;
-
- friend class CXXRecordDecl;
- explicit friend_iterator(FriendDecl *Ptr) : Ptr(Ptr) {}
-public:
- friend_iterator() {}
-
- typedef FriendDecl *value_type;
- typedef FriendDecl *reference;
- typedef FriendDecl *pointer;
- typedef int difference_type;
- typedef std::forward_iterator_tag iterator_category;
-
- reference operator*() const { return Ptr; }
-
- friend_iterator &operator++() {
- assert(Ptr && "attempt to increment past end of friend list");
- Ptr = Ptr->getNextFriend();
- return *this;
- }
-
- friend_iterator operator++(int) {
- friend_iterator tmp = *this;
- ++*this;
- return tmp;
- }
-
- bool operator==(const friend_iterator &Other) const {
- return Ptr == Other.Ptr;
- }
-
- bool operator!=(const friend_iterator &Other) const {
- return Ptr != Other.Ptr;
- }
-
- friend_iterator &operator+=(difference_type N) {
- assert(N >= 0 && "cannot rewind a CXXRecordDecl::friend_iterator");
- while (N--)
- ++*this;
- return *this;
- }
-
- friend_iterator operator+(difference_type N) const {
- friend_iterator tmp = *this;
- tmp += N;
- return tmp;
- }
-};
-
-inline CXXRecordDecl::friend_iterator CXXRecordDecl::friend_begin() const {
- return friend_iterator(getFirstFriend());
-}
-
-inline CXXRecordDecl::friend_iterator CXXRecordDecl::friend_end() const {
- return friend_iterator(nullptr);
-}
-
-inline CXXRecordDecl::friend_range CXXRecordDecl::friends() const {
- return friend_range(friend_begin(), friend_end());
-}
-
-inline void CXXRecordDecl::pushFriendDecl(FriendDecl *FD) {
- assert(!FD->NextFriend && "friend already has next friend?");
- FD->NextFriend = data().FirstFriend;
- data().FirstFriend = FD;
-}
-
-}
-
-#endif
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