| 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 |