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f3ff561c6f
This is phase-1 of switching from llvm::Optional to std::optional in the
next rebranch. llvm::Optional was removed from upstream LLVM, so we need
to migrate off rather soon. On Darwin, std::optional, and llvm::Optional
have the same layout, so we don't need to be as concerned about ABI
beyond the name mangling. `llvm::Optional` is only returned from one
function in
```
getStandardTypeSubst(StringRef TypeName,
bool allowConcurrencyManglings);
```
It's the return value, so it should not impact the mangling of the
function, and the layout is the same as `std::optional`, so it should be
mostly okay. This function doesn't appear to have users, and the ABI was
already broken 2 years ago for concurrency and no one seemed to notice
so this should be "okay".
I'm doing the migration incrementally so that folks working on main can
cherry-pick back to the release/5.9 branch. Once 5.9 is done and locked
away, then we can go through and finish the replacement. Since `None`
and `Optional` show up in contexts where they are not `llvm::None` and
`llvm::Optional`, I'm preparing the work now by going through and
removing the namespace unwrapping and making the `llvm` namespace
explicit. This should make it fairly mechanical to go through and
replace llvm::Optional with std::optional, and llvm::None with
std::nullopt. It's also a change that can be brought onto the
release/5.9 with minimal impact. This should be an NFC change.
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
//===--- AccessRequests.h - Access{Level,Scope} Requests -----*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines access-control requests.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_ACCESS_REQUESTS_H
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#define SWIFT_ACCESS_REQUESTS_H
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#include "swift/AST/AccessScope.h"
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#include "swift/AST/AttrKind.h"
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#include "swift/AST/Evaluator.h"
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#include "swift/AST/SimpleRequest.h"
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#include "swift/Basic/Statistic.h"
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#include "llvm/ADT/Hashing.h"
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namespace swift {
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class AbstractStorageDecl;
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class ExtensionDecl;
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class ValueDecl;
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/// Request the AccessLevel of the given ValueDecl.
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class AccessLevelRequest :
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public SimpleRequest<AccessLevelRequest,
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AccessLevel(ValueDecl *),
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RequestFlags::SeparatelyCached> {
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public:
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using SimpleRequest::SimpleRequest;
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private:
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friend SimpleRequest;
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// Evaluation.
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AccessLevel evaluate(Evaluator &evaluator, ValueDecl *decl) const;
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public:
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// Separate caching.
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bool isCached() const { return true; }
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llvm::Optional<AccessLevel> getCachedResult() const;
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void cacheResult(AccessLevel value) const;
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};
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/// Request the setter AccessLevel of the given AbstractStorageDecl,
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/// which may be lower than its normal AccessLevel, and determines
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/// the accessibility of mutating accessors.
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class SetterAccessLevelRequest :
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public SimpleRequest<SetterAccessLevelRequest,
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AccessLevel(AbstractStorageDecl *),
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RequestFlags::SeparatelyCached> {
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public:
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using SimpleRequest::SimpleRequest;
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private:
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friend SimpleRequest;
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// Evaluation.
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AccessLevel evaluate(Evaluator &evaluator, AbstractStorageDecl *decl) const;
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public:
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// Separate caching.
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bool isCached() const { return true; }
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llvm::Optional<AccessLevel> getCachedResult() const;
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void cacheResult(AccessLevel value) const;
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};
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using DefaultAndMax = std::pair<AccessLevel, AccessLevel>;
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/// Request the Default and Max AccessLevels of the given ExtensionDecl.
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class DefaultAndMaxAccessLevelRequest :
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public SimpleRequest<DefaultAndMaxAccessLevelRequest,
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DefaultAndMax(ExtensionDecl *),
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RequestFlags::SeparatelyCached> {
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public:
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using SimpleRequest::SimpleRequest;
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private:
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friend SimpleRequest;
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// Evaluation.
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DefaultAndMax evaluate(Evaluator &evaluator, ExtensionDecl *decl) const;
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public:
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// Separate caching.
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bool isCached() const { return true; }
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llvm::Optional<DefaultAndMax> getCachedResult() const;
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void cacheResult(DefaultAndMax value) const;
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};
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#define SWIFT_TYPEID_ZONE AccessControl
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#define SWIFT_TYPEID_HEADER "swift/AST/AccessTypeIDZone.def"
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#include "swift/Basic/DefineTypeIDZone.h"
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#undef SWIFT_TYPEID_ZONE
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#undef SWIFT_TYPEID_HEADER
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// Set up reporting of evaluated requests.
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#define SWIFT_REQUEST(Zone, RequestType, Sig, Caching, LocOptions) \
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template <> \
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inline void reportEvaluatedRequest(UnifiedStatsReporter &stats, \
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const RequestType &request) { \
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++stats.getFrontendCounters().RequestType; \
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}
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#include "swift/AST/AccessTypeIDZone.def"
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#undef SWIFT_REQUEST
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} // end namespace swift
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#endif // SWIFT_ACCESS_REQUESTS_H
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