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7b89afbb6e
Allow DependencyScanner to canonicalize path using a prefix map. When option `-scanner-prefix-map` option is used, dependency scanner will remap all the input paths in following: * all the paths in the CAS file system or clang include tree * all the paths related to input on the command-line returned by scanner This allows all the input paths to be canonicalized so cache key can be computed reguardless of the exact on disk path. The sourceFile field is not remapped so build system can track the exact file as on the local file system.
550 lines
21 KiB
C++
550 lines
21 KiB
C++
//===--- SerializedModuleLoader.h - Import Swift modules --------*- 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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#ifndef SWIFT_SERIALIZATION_MODULELOADER_H
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#define SWIFT_SERIALIZATION_MODULELOADER_H
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#include "swift/AST/FileUnit.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/ModuleLoader.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrefixMapper.h"
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namespace swift {
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class ModuleFile;
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class PathObfuscator;
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enum class ModuleLoadingBehavior;
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namespace file_types {
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enum ID : uint8_t;
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}
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/// Specifies how to load modules when both a module interface and serialized
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/// AST are present, or whether to disallow one format or the other altogether.
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enum class ModuleLoadingMode {
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PreferInterface,
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PreferSerialized,
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OnlyInterface,
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OnlySerialized
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};
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/// How a dependency should be loaded.
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///
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/// \sa getTransitiveLoadingBehavior
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enum class ModuleLoadingBehavior {
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Required,
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Optional,
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Ignored
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};
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/// Helper type used to pass and compute the sets of related filenames used by
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/// \c SerializedModuleLoader subclasses.
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struct SerializedModuleBaseName {
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/// The base filename, without any extension.
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SmallString<256> baseName;
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/// Creates a \c SerializedModuleBaseName.
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SerializedModuleBaseName(StringRef baseName) : baseName(baseName) { }
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/// Creates a \c SerializedModuleBaseName by contextualizing an existing one
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/// with a \c parentDir.
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SerializedModuleBaseName(StringRef parentDir,
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const SerializedModuleBaseName &name);
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/// Gets the filename with a particular extension appended to it.
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std::string getName(file_types::ID fileTy) const;
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/// If the interface with \p baseName exists, returns its path (which may be
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/// the private interface if there is one). Return an empty optional
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/// otherwise.
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llvm::Optional<std::string>
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findInterfacePath(llvm::vfs::FileSystem &fs) const;
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};
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/// Common functionality shared between \c ImplicitSerializedModuleLoader,
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/// \c ModuleInterfaceLoader, \c ExplicitSwiftModuleLoader
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/// and \c MemoryBufferSerializedModuleLoader.
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class SerializedModuleLoaderBase : public ModuleLoader {
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/// A { module, generation # } pair.
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using LoadedModulePair = std::pair<std::unique_ptr<ModuleFile>, unsigned>;
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std::vector<LoadedModulePair> LoadedModuleFiles;
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SmallVector<std::unique_ptr<ModuleFile>, 2> OrphanedModuleFiles;
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protected:
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ASTContext &Ctx;
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ModuleLoadingMode LoadMode;
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bool IgnoreSwiftSourceInfoFile;
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SerializedModuleLoaderBase(ASTContext &ctx, DependencyTracker *tracker,
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ModuleLoadingMode LoadMode,
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bool IgnoreSwiftSourceInfoFile);
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void collectVisibleTopLevelModuleNamesImpl(SmallVectorImpl<Identifier> &names,
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StringRef extension) const;
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virtual bool findModule(
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ImportPath::Element moduleID, SmallVectorImpl<char> *moduleInterfacePath,
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SmallVectorImpl<char> *moduleInterfaceSourcePath,
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std::unique_ptr<llvm::MemoryBuffer> *moduleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *moduleDocBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *moduleSourceInfoBuffer,
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bool skipBuildingInterface, bool isTestableDependencyLookup,
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bool &isFramework, bool &isSystemModule);
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/// Attempts to search the provided directory for a loadable serialized
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/// .swiftmodule with the provided `ModuleFilename`. Subclasses must
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/// override this method to perform their custom module lookup behavior.
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///
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/// If such a module could not be loaded, the subclass must return a
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/// `std::error_code` indicating the failure. There are two specific error
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/// codes that will be treated specially:
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/// - `errc::no_such_file_or_directory`: The module loader will stop looking
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/// for loadable modules and will diagnose the lookup failure.
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/// - `errc::not_supported`: The module loader will stop looking for loadable
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/// modules and will defer to the remaining module loaders to look up this
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/// module.
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virtual std::error_code findModuleFilesInDirectory(
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ImportPath::Element ModuleID, const SerializedModuleBaseName &BaseName,
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SmallVectorImpl<char> *ModuleInterfacePath,
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SmallVectorImpl<char> *ModuleInterfaceSourcePath,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer,
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bool SkipBuildingInterface, bool IsFramework,
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bool isTestableDependencyLookup = false) = 0;
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std::error_code
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openModuleFile(
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ImportPath::Element ModuleID,
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const SerializedModuleBaseName &BaseName,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer);
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std::error_code
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openModuleDocFileIfPresent(
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ImportPath::Element ModuleID,
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const SerializedModuleBaseName &BaseName,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer);
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std::error_code
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openModuleSourceInfoFileIfPresent(
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ImportPath::Element ModuleID,
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const SerializedModuleBaseName &BaseName,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer);
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/// If the module loader subclass knows that all options have been tried for
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/// loading an architecture-specific file out of a swiftmodule bundle, try
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/// to list the architectures that \e are present.
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///
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/// \returns true if an error diagnostic was emitted
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virtual bool maybeDiagnoseTargetMismatch(
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SourceLoc sourceLocation,
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StringRef moduleName,
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const SerializedModuleBaseName &BaseName) {
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return false;
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}
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/// Determines if the provided path is a cached artifact for dependency
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/// tracking purposes.
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virtual bool isCached(StringRef DepPath) {
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return false;
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}
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/// Scan the given serialized module file to determine dependencies.
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llvm::ErrorOr<ModuleDependencyInfo> scanModuleFile(Twine modulePath, bool isFramework);
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struct BinaryModuleImports {
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llvm::StringSet<> moduleImports;
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llvm::StringSet<> headerImports;
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};
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static llvm::ErrorOr<BinaryModuleImports>
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getImportsOfModule(Twine modulePath,
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ModuleLoadingBehavior transitiveBehavior,
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bool isFramework,
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bool isRequiredOSSAModules,
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StringRef SDKName,
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StringRef packageName,
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llvm::vfs::FileSystem *fileSystem,
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PathObfuscator &recoverer);
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/// Load the module file into a buffer and also collect its module name.
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static std::unique_ptr<llvm::MemoryBuffer>
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getModuleName(ASTContext &Ctx, StringRef modulePath, std::string &Name);
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public:
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virtual ~SerializedModuleLoaderBase();
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SerializedModuleLoaderBase(const SerializedModuleLoaderBase &) = delete;
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SerializedModuleLoaderBase(SerializedModuleLoaderBase &&) = delete;
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SerializedModuleLoaderBase &operator=(const SerializedModuleLoaderBase &) = delete;
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SerializedModuleLoaderBase &operator=(SerializedModuleLoaderBase &&) = delete;
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/// Attempt to load a serialized AST into the given module.
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///
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/// If the AST cannot be loaded and \p diagLoc is present, a diagnostic is
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/// printed. (Note that \p diagLoc is allowed to be invalid.)
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LoadedFile *
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loadAST(ModuleDecl &M, llvm::Optional<SourceLoc> diagLoc,
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StringRef moduleInterfacePath, StringRef moduleInterfaceSourcePath,
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std::unique_ptr<llvm::MemoryBuffer> moduleInputBuffer,
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std::unique_ptr<llvm::MemoryBuffer> moduleDocInputBuffer,
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std::unique_ptr<llvm::MemoryBuffer> moduleSourceInfoInputBuffer,
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bool isFramework);
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bool isRequiredOSSAModules() const;
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/// Check whether the module with a given name can be imported without
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/// importing it.
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///
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/// Note that even if this check succeeds, errors may still occur if the
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/// module is loaded in full.
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///
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/// If a non-null \p versionInfo is provided, the module version will be
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/// parsed and populated.
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virtual bool canImportModule(ImportPath::Module named,
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ModuleVersionInfo *versionInfo,
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bool isTestableDependencyLookup = false) override;
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/// Import a module with the given module path.
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///
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/// \param importLoc The location of the 'import' keyword.
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///
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/// \param path A sequence of (identifier, location) pairs that denote
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/// the dotted module name to load, e.g., AppKit.NSWindow.
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///
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/// \returns the module referenced, if it could be loaded. Otherwise,
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/// emits a diagnostic and returns a FailedImportModule object.
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virtual ModuleDecl *
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loadModule(SourceLoc importLoc,
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ImportPath::Module path,
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bool AllowMemoryCache) override;
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virtual void loadExtensions(NominalTypeDecl *nominal,
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unsigned previousGeneration) override;
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virtual void loadObjCMethods(
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NominalTypeDecl *typeDecl,
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ObjCSelector selector,
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bool isInstanceMethod,
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unsigned previousGeneration,
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llvm::TinyPtrVector<AbstractFunctionDecl *> &methods) override;
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virtual void loadDerivativeFunctionConfigurations(
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AbstractFunctionDecl *originalAFD, unsigned previousGeneration,
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llvm::SetVector<AutoDiffConfig> &results) override;
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virtual void verifyAllModules() override;
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virtual llvm::SmallVector<std::pair<ModuleDependencyID, ModuleDependencyInfo>, 1>
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getModuleDependencies(StringRef moduleName, StringRef moduleOutputPath,
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llvm::IntrusiveRefCntPtr<llvm::cas::CachingOnDiskFileSystem> CacheFS,
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const llvm::DenseSet<clang::tooling::dependencies::ModuleID> &alreadySeenClangModules,
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clang::tooling::dependencies::DependencyScanningTool &clangScanningTool,
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InterfaceSubContextDelegate &delegate,
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llvm::TreePathPrefixMapper *mapper,
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bool isTestableImport) override;
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};
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/// Imports serialized Swift modules into an ASTContext.
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class ImplicitSerializedModuleLoader : public SerializedModuleLoaderBase {
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ImplicitSerializedModuleLoader(ASTContext &ctx, DependencyTracker *tracker,
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ModuleLoadingMode loadMode, bool IgnoreSwiftSourceInfo)
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: SerializedModuleLoaderBase(ctx, tracker, loadMode, IgnoreSwiftSourceInfo)
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{}
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std::error_code findModuleFilesInDirectory(
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ImportPath::Element ModuleID, const SerializedModuleBaseName &BaseName,
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SmallVectorImpl<char> *ModuleInterfacePath,
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SmallVectorImpl<char> *ModuleInterfaceSourcePath,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer,
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bool SkipBuildingInterface, bool IsFramework,
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bool isTestableDependencyLookup = false) override;
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bool maybeDiagnoseTargetMismatch(
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SourceLoc sourceLocation,
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StringRef moduleName,
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const SerializedModuleBaseName &BaseName) override;
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public:
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virtual ~ImplicitSerializedModuleLoader();
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/// Append visible module names to \p names. Note that names are possibly
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/// duplicated, and not guaranteed to be ordered in any way.
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void collectVisibleTopLevelModuleNames(
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SmallVectorImpl<Identifier> &names) const override;
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/// Create a new importer that can load serialized Swift modules
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/// into the given ASTContext.
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static std::unique_ptr<ImplicitSerializedModuleLoader>
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create(ASTContext &ctx, DependencyTracker *tracker = nullptr,
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ModuleLoadingMode loadMode = ModuleLoadingMode::PreferSerialized,
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bool IgnoreSwiftSourceInfo = false) {
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return std::unique_ptr<ImplicitSerializedModuleLoader>{
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new ImplicitSerializedModuleLoader(ctx, tracker, loadMode, IgnoreSwiftSourceInfo)
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};
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}
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};
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/// Imports serialized Swift modules from a MemoryBuffer into an ASTContext.
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/// This interface is primarily used by LLDB.
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class MemoryBufferSerializedModuleLoader : public SerializedModuleLoaderBase {
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struct MemoryBufferInfo {
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std::unique_ptr<llvm::MemoryBuffer> buffer;
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llvm::VersionTuple userVersion;
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};
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llvm::StringMap<MemoryBufferInfo> MemoryBuffers;
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MemoryBufferSerializedModuleLoader(ASTContext &ctx,
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DependencyTracker *tracker,
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ModuleLoadingMode loadMode,
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bool IgnoreSwiftSourceInfo,
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bool BypassResilience)
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: SerializedModuleLoaderBase(ctx, tracker, loadMode,
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IgnoreSwiftSourceInfo),
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BypassResilience(BypassResilience) {}
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std::error_code findModuleFilesInDirectory(
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ImportPath::Element ModuleID, const SerializedModuleBaseName &BaseName,
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SmallVectorImpl<char> *ModuleInterfacePath,
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SmallVectorImpl<char> *ModuleInterfaceSourcePath,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleDocBuffer,
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std::unique_ptr<llvm::MemoryBuffer> *ModuleSourceInfoBuffer,
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bool SkipBuildingInterface, bool IsFramework,
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bool IsTestableDependencyLookup = false) override;
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bool maybeDiagnoseTargetMismatch(
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SourceLoc sourceLocation,
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StringRef moduleName,
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const SerializedModuleBaseName &BaseName) override;
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bool BypassResilience;
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public:
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virtual ~MemoryBufferSerializedModuleLoader();
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bool canImportModule(ImportPath::Module named,
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ModuleVersionInfo *versionInfo,
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bool isTestableDependencyLookup = false) override;
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ModuleDecl *
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loadModule(SourceLoc importLoc,
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ImportPath::Module path,
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bool AllowMemoryCache = true) override;
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/// Register a memory buffer that contains the serialized module for the given
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/// access path. This API is intended to be used by LLDB to add swiftmodules
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/// discovered in the __swift_ast section of a Mach-O file (or the .swift_ast
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/// section of an ELF file) to the search path.
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///
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/// FIXME: make this an actual import *path* once submodules are designed.
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void registerMemoryBuffer(StringRef importPath,
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std::unique_ptr<llvm::MemoryBuffer> input,
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llvm::VersionTuple version) {
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MemoryBuffers[importPath] = {std::move(input), version};
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}
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void collectVisibleTopLevelModuleNames(
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SmallVectorImpl<Identifier> &names) const override {}
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/// Create a new importer that can load serialized Swift modules
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/// into the given ASTContext.
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static std::unique_ptr<MemoryBufferSerializedModuleLoader>
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create(ASTContext &ctx, DependencyTracker *tracker = nullptr,
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ModuleLoadingMode loadMode = ModuleLoadingMode::PreferSerialized,
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bool IgnoreSwiftSourceInfo = false, bool BypassResilience = false) {
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return std::unique_ptr<MemoryBufferSerializedModuleLoader>{
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new MemoryBufferSerializedModuleLoader(
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ctx, tracker, loadMode, IgnoreSwiftSourceInfo, BypassResilience)};
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}
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};
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/// A file-unit loaded from a serialized AST file.
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class SerializedASTFile final : public LoadedFile {
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friend class SerializedModuleLoaderBase;
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friend class SerializedSILLoader;
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friend class ModuleFile;
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ModuleFile &File;
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SerializedASTFile(ModuleDecl &M, ModuleFile &file)
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: LoadedFile(FileUnitKind::SerializedAST, M), File(file) {}
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void
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collectLinkLibrariesFromImports(ModuleDecl::LinkLibraryCallback callback) const;
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public:
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/// Whether this represents a '.sib' file.
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bool isSIB() const;
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/// Returns the language version that was used to compile the contents of this
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/// file.
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const version::Version &getLanguageVersionBuiltWith() const;
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virtual bool hadLoadError() const override;
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virtual bool isSystemModule() const override;
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virtual void lookupValue(DeclName name, NLKind lookupKind,
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OptionSet<ModuleLookupFlags> Flags,
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SmallVectorImpl<ValueDecl*> &results) const override;
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virtual StringRef
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getFilenameForPrivateDecl(const Decl *decl) const override;
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virtual TypeDecl *lookupLocalType(StringRef MangledName) const override;
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virtual OpaqueTypeDecl *
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lookupOpaqueResultType(StringRef MangledName) override;
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virtual TypeDecl *
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lookupNestedType(Identifier name,
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const NominalTypeDecl *parent) const override;
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protected:
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virtual void
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lookupOperatorDirect(Identifier name, OperatorFixity fixity,
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TinyPtrVector<OperatorDecl *> &results) const override;
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virtual void lookupPrecedenceGroupDirect(
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Identifier name,
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TinyPtrVector<PrecedenceGroupDecl *> &results) const override;
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public:
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virtual void lookupVisibleDecls(ImportPath::Access accessPath,
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VisibleDeclConsumer &consumer,
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NLKind lookupKind) const override;
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virtual void lookupClassMembers(ImportPath::Access accessPath,
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VisibleDeclConsumer &consumer) const override;
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virtual void
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lookupClassMember(ImportPath::Access accessPath, DeclName name,
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SmallVectorImpl<ValueDecl*> &decls) const override;
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/// Find all Objective-C methods with the given selector.
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void lookupObjCMethods(
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ObjCSelector selector,
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SmallVectorImpl<AbstractFunctionDecl *> &results) const override;
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llvm::Optional<Fingerprint>
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loadFingerprint(const IterableDeclContext *IDC) const override;
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virtual void
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lookupImportedSPIGroups(
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const ModuleDecl *importedModule,
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llvm::SmallSetVector<Identifier, 4> &spiGroups) const override;
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llvm::Optional<CommentInfo> getCommentForDecl(const Decl *D) const override;
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bool hasLoadedSwiftDoc() const override;
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llvm::Optional<StringRef> getGroupNameForDecl(const Decl *D) const override;
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llvm::Optional<StringRef>
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getSourceFileNameForDecl(const Decl *D) const override;
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llvm::Optional<unsigned> getSourceOrderForDecl(const Decl *D) const override;
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llvm::Optional<StringRef> getGroupNameByUSR(StringRef USR) const override;
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llvm::Optional<ExternalSourceLocs::RawLocs>
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getExternalRawLocsForDecl(const Decl *D) const override;
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void collectAllGroups(SmallVectorImpl<StringRef> &Names) const override;
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virtual void getTopLevelDecls(SmallVectorImpl<Decl*> &results) const override;
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virtual void getExportedPrespecializations(
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SmallVectorImpl<Decl *> &results) const override;
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virtual void
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getTopLevelDeclsWhereAttributesMatch(
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SmallVectorImpl<Decl*> &Results,
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llvm::function_ref<bool(DeclAttributes)> matchAttributes) const override;
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virtual void
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getOperatorDecls(SmallVectorImpl<OperatorDecl *> &results) const override;
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virtual void
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getPrecedenceGroups(SmallVectorImpl<PrecedenceGroupDecl*> &Results) const override;
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virtual void
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getLocalTypeDecls(SmallVectorImpl<TypeDecl*> &results) const override;
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virtual void
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getOpaqueReturnTypeDecls(SmallVectorImpl<OpaqueTypeDecl*> &results) const override;
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virtual void getDisplayDecls(SmallVectorImpl<Decl*> &results, bool recursive = false) const override;
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virtual void
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getImportedModules(SmallVectorImpl<ImportedModule> &imports,
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ModuleDecl::ImportFilter filter) const override;
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virtual void
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collectLinkLibraries(ModuleDecl::LinkLibraryCallback callback) const override;
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virtual void loadDependenciesForTestable(SourceLoc diagLoc) const override;
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Identifier getDiscriminatorForPrivateDecl(const Decl *D) const override;
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virtual StringRef getFilename() const override;
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virtual StringRef getLoadedFilename() const override;
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virtual StringRef getSourceFilename() const override;
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virtual StringRef getModuleDefiningPath() const override;
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virtual StringRef getExportedModuleName() const override;
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ValueDecl *getMainDecl() const override;
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bool hasEntryPoint() const override;
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virtual const clang::Module *getUnderlyingClangModule() const override;
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virtual ModuleDecl *getUnderlyingModuleIfOverlay() const override;
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virtual bool getAllGenericSignatures(
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SmallVectorImpl<GenericSignature> &genericSignatures)
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override;
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StringRef getTargetTriple() const;
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virtual void collectBasicSourceFileInfo(
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llvm::function_ref<void(const BasicSourceFileInfo &)>) const override;
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virtual void collectSerializedSearchPath(
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llvm::function_ref<void(StringRef)> callback) const override;
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static bool classof(const FileUnit *file) {
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return file->getKind() == FileUnitKind::SerializedAST;
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}
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static bool classof(const DeclContext *DC) {
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|
return isa<FileUnit>(DC) && classof(cast<FileUnit>(DC));
|
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}
|
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};
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/// Extract compiler arguments from an interface file buffer.
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bool extractCompilerFlagsFromInterface(StringRef interfacePath,
|
|
StringRef buffer, llvm::StringSaver &ArgSaver,
|
|
SmallVectorImpl<const char *> &SubArgs);
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/// Extract the user module version number from an interface file.
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llvm::VersionTuple extractUserModuleVersionFromInterface(StringRef moduleInterfacePath);
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} // end namespace swift
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#endif
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