| //===--- DeclAccessPair.h - A decl bundled with its path access -*- 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 DeclAccessPair class, which provides an |
| // efficient representation of a pair of a NamedDecl* and an |
| // AccessSpecifier. Generally the access specifier gives the |
| // natural access of a declaration when named in a class, as |
| // defined in C++ [class.access.base]p1. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_AST_DECLACCESSPAIR_H |
| #define LLVM_CLANG_AST_DECLACCESSPAIR_H |
| |
| #include "clang/Basic/Specifiers.h" |
| #include "llvm/Support/DataTypes.h" |
| |
| namespace clang { |
| |
| class NamedDecl; |
| |
| /// A POD class for pairing a NamedDecl* with an access specifier. |
| /// Can be put into unions. |
| class DeclAccessPair { |
| uintptr_t Ptr; // we'd use llvm::PointerUnion, but it isn't trivial |
| |
| enum { Mask = 0x3 }; |
| |
| public: |
| static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS) { |
| DeclAccessPair p; |
| p.set(D, AS); |
| return p; |
| } |
| |
| NamedDecl *getDecl() const { |
| return reinterpret_cast<NamedDecl*>(~Mask & Ptr); |
| } |
| AccessSpecifier getAccess() const { |
| return AccessSpecifier(Mask & Ptr); |
| } |
| |
| void setDecl(NamedDecl *D) { |
| set(D, getAccess()); |
| } |
| void setAccess(AccessSpecifier AS) { |
| set(getDecl(), AS); |
| } |
| void set(NamedDecl *D, AccessSpecifier AS) { |
| Ptr = uintptr_t(AS) | reinterpret_cast<uintptr_t>(D); |
| } |
| |
| operator NamedDecl*() const { return getDecl(); } |
| NamedDecl *operator->() const { return getDecl(); } |
| }; |
| } |
| |
| // Take a moment to tell SmallVector that DeclAccessPair is POD. |
| namespace llvm { |
| template<typename> struct isPodLike; |
| template<> struct isPodLike<clang::DeclAccessPair> { |
| static const bool value = true; |
| }; |
| } |
| |
| #endif |