1 | //===-- UnresolvedSet.h - Unresolved sets of declarations ------*- C++ -*-===// |
---|---|
2 | // |
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 |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the WeakInfo class, which is used to store |
10 | // information about the target of a #pragma weak directive. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #ifndef LLVM_CLANG_SEMA_WEAK_H |
15 | #define LLVM_CLANG_SEMA_WEAK_H |
16 | |
17 | #include "clang/Basic/SourceLocation.h" |
18 | #include "llvm/ADT/DenseMapInfo.h" |
19 | |
20 | namespace clang { |
21 | |
22 | class IdentifierInfo; |
23 | |
24 | /// Captures information about a \#pragma weak directive. |
25 | class WeakInfo { |
26 | const IdentifierInfo *alias = nullptr; // alias (optional) |
27 | SourceLocation loc; // for diagnostics |
28 | public: |
29 | WeakInfo() = default; |
30 | WeakInfo(const IdentifierInfo *Alias, SourceLocation Loc) |
31 | : alias(Alias), loc(Loc) {} |
32 | inline const IdentifierInfo *getAlias() const { return alias; } |
33 | inline SourceLocation getLocation() const { return loc; } |
34 | bool operator==(WeakInfo RHS) const = delete; |
35 | bool operator!=(WeakInfo RHS) const = delete; |
36 | |
37 | struct DenseMapInfoByAliasOnly |
38 | : private llvm::DenseMapInfo<const IdentifierInfo *> { |
39 | static inline WeakInfo getEmptyKey() { |
40 | return WeakInfo(DenseMapInfo::getEmptyKey(), SourceLocation()); |
41 | } |
42 | static inline WeakInfo getTombstoneKey() { |
43 | return WeakInfo(DenseMapInfo::getTombstoneKey(), SourceLocation()); |
44 | } |
45 | static unsigned getHashValue(const WeakInfo &W) { |
46 | return DenseMapInfo::getHashValue(PtrVal: W.getAlias()); |
47 | } |
48 | static bool isEqual(const WeakInfo &LHS, const WeakInfo &RHS) { |
49 | return DenseMapInfo::isEqual(LHS: LHS.getAlias(), RHS: RHS.getAlias()); |
50 | } |
51 | }; |
52 | }; |
53 | |
54 | } // end namespace clang |
55 | |
56 | #endif // LLVM_CLANG_SEMA_WEAK_H |
57 |