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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===--- DeclAccessPair.h - A decl bundled with its path access -*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file defines the DeclAccessPair class, which provides an |
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| 10 | // efficient representation of a pair of a NamedDecl* and an |
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| 11 | // AccessSpecifier. Generally the access specifier gives the |
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| 12 | // natural access of a declaration when named in a class, as |
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| 13 | // defined in C++ [class.access.base]p1. |
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| 14 | // |
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| 15 | //===----------------------------------------------------------------------===// |
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| 16 | |||
| 17 | #ifndef LLVM_CLANG_AST_DECLACCESSPAIR_H |
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| 18 | #define LLVM_CLANG_AST_DECLACCESSPAIR_H |
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| 19 | |||
| 20 | #include "clang/Basic/Specifiers.h" |
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| 21 | #include "llvm/Support/DataTypes.h" |
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| 22 | |||
| 23 | namespace clang { |
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| 24 | |||
| 25 | class NamedDecl; |
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| 26 | |||
| 27 | /// A POD class for pairing a NamedDecl* with an access specifier. |
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| 28 | /// Can be put into unions. |
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| 29 | class DeclAccessPair { |
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| 30 | uintptr_t Ptr; // we'd use llvm::PointerUnion, but it isn't trivial |
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| 31 | |||
| 32 | enum { Mask = 0x3 }; |
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| 33 | |||
| 34 | public: |
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| 35 | static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS) { |
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| 36 | DeclAccessPair p; |
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| 37 | p.set(D, AS); |
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| 38 | return p; |
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| 39 | } |
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| 40 | |||
| 41 | NamedDecl *getDecl() const { |
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| 42 | return reinterpret_cast<NamedDecl*>(~Mask & Ptr); |
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| 43 | } |
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| 44 | AccessSpecifier getAccess() const { |
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| 45 | return AccessSpecifier(Mask & Ptr); |
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| 46 | } |
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| 47 | |||
| 48 | void setDecl(NamedDecl *D) { |
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| 49 | set(D, getAccess()); |
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| 50 | } |
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| 51 | void setAccess(AccessSpecifier AS) { |
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| 52 | set(getDecl(), AS); |
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| 53 | } |
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| 54 | void set(NamedDecl *D, AccessSpecifier AS) { |
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| 55 | Ptr = uintptr_t(AS) | reinterpret_cast<uintptr_t>(D); |
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| 56 | } |
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| 57 | |||
| 58 | operator NamedDecl*() const { return getDecl(); } |
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| 59 | NamedDecl *operator->() const { return getDecl(); } |
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| 60 | }; |
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| 61 | } |
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| 62 | |||
| 63 | #endif |