1 //===--- DeclAccessPair.h - A decl bundled with its path access -*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines the DeclAccessPair class, which provides an
10 // efficient representation of a pair of a NamedDecl* and an
11 // AccessSpecifier. Generally the access specifier gives the
12 // natural access of a declaration when named in a class, as
13 // defined in C++ [class.access.base]p1.
15 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_CLANG_AST_DECLACCESSPAIR_H
18 #define LLVM_CLANG_AST_DECLACCESSPAIR_H
20 #include "clang/Basic/Specifiers.h"
21 #include "llvm/Support/DataTypes.h"
27 /// A POD class for pairing a NamedDecl* with an access specifier.
28 /// Can be put into unions.
29 class DeclAccessPair {
30 uintptr_t Ptr; // we'd use llvm::PointerUnion, but it isn't trivial
35 static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS) {
41 NamedDecl *getDecl() const {
42 return reinterpret_cast<NamedDecl*>(~Mask & Ptr);
44 AccessSpecifier getAccess() const {
45 return AccessSpecifier(Mask & Ptr);
48 void setDecl(NamedDecl *D) {
51 void setAccess(AccessSpecifier AS) {
54 void set(NamedDecl *D, AccessSpecifier AS) {
55 Ptr = uintptr_t(AS) | reinterpret_cast<uintptr_t>(D);
58 operator NamedDecl*() const { return getDecl(); }
59 NamedDecl *operator->() const { return getDecl(); }