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//===-- 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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