//===-- UnresolvedSet.h - Unresolved sets of declarations ------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file defines the WeakInfo class, which is used to store // information about the target of a #pragma weak directive. // //===----------------------------------------------------------------------===// #ifndef LLVM_CLANG_SEMA_WEAK_H #define LLVM_CLANG_SEMA_WEAK_H #include "clang/Basic/SourceLocation.h" #include "llvm/ADT/DenseMapInfo.h" namespace clang { class IdentifierInfo; /// Captures information about a \#pragma weak directive. class WeakInfo { const IdentifierInfo *alias = nullptr; // alias (optional) SourceLocation loc; // for diagnostics public: WeakInfo() = default; WeakInfo(const IdentifierInfo *Alias, SourceLocation Loc) : alias(Alias), loc(Loc) {} inline const IdentifierInfo *getAlias() const { return alias; } inline SourceLocation getLocation() const { return loc; } bool operator==(WeakInfo RHS) const = delete; bool operator!=(WeakInfo RHS) const = delete; struct DenseMapInfoByAliasOnly : private llvm::DenseMapInfo<const IdentifierInfo *> { static inline WeakInfo getEmptyKey() { return WeakInfo(DenseMapInfo::getEmptyKey(), SourceLocation()); } static inline WeakInfo getTombstoneKey() { return WeakInfo(DenseMapInfo::getTombstoneKey(), SourceLocation()); } static unsigned getHashValue(const WeakInfo &W) { return DenseMapInfo::getHashValue(W.getAlias()); } static bool isEqual(const WeakInfo &LHS, const WeakInfo &RHS) { return DenseMapInfo::isEqual(LHS.getAlias(), RHS.getAlias()); } }; }; } // end namespace clang #endif // LLVM_CLANG_SEMA_WEAK_H

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