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107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
//===--- MigrationState.h - Migration State ---------------------*- 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 class is an explicit container for a state during migration, its input
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// and output text, as well as what created this state.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_MIGRATOR_MIGRATIONSTATE_H
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#define SWIFT_MIGRATOR_MIGRATIONSTATE_H
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#include "llvm/ADT/IntrusiveRefCntPtr.h"
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#include "llvm/ADT/StringRef.h"
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namespace swift {
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class SourceManager;
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namespace migrator {
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enum class MigrationKind {
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/// The start state of the migrator.
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Start,
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/// A syntactic pass. This is generic for now because there isn't a good
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/// way to separate out and compose syntactic passes until lib/Syntax is
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/// integrated.
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Syntactic,
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/// The compiler has made several passes over the input file and we
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/// applied the suggested fix-its we deemed appropriate.
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CompilerFixits,
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};
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struct MigrationState : public llvm::ThreadSafeRefCountedBase<MigrationState> {
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MigrationKind Kind;
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SourceManager &SrcMgr;
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unsigned InputBufferID;
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unsigned OutputBufferID;
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MigrationState(const MigrationKind Kind, SourceManager &SrcMgr,
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const unsigned InputBufferID, const unsigned OutputBufferID)
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: Kind(Kind), SrcMgr(SrcMgr),
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InputBufferID(InputBufferID),
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OutputBufferID(OutputBufferID) {}
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MigrationKind getKind() const {
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return Kind;
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}
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std::string getInputText() const;
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unsigned getInputBufferID() const {
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return InputBufferID;
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}
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std::string getOutputText() const;
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unsigned getOutputBufferID() const {
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return OutputBufferID;
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}
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/// Write all relevant information about the state to OutDir, such as the
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/// input file, output file, replacements, syntax trees, etc.
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bool print(size_t StateNumber, StringRef OutDir) const;
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bool noChangesOccurred() const {
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return InputBufferID == OutputBufferID;
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}
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static llvm::IntrusiveRefCntPtr<MigrationState>
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start(SourceManager &SrcMgr, const unsigned InputBufferID) {
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return llvm::IntrusiveRefCntPtr<MigrationState> {
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new MigrationState {
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MigrationKind::Start, SrcMgr, InputBufferID, InputBufferID
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}
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};
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}
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static llvm::IntrusiveRefCntPtr<MigrationState>
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make(MigrationKind Kind, SourceManager &SrcMgr, const unsigned InputBufferID,
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const unsigned OutputBufferID) {
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return llvm::IntrusiveRefCntPtr<MigrationState> {
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new MigrationState {
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Kind,
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SrcMgr,
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InputBufferID,
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// The input is the output here, because nothing happened yet.
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OutputBufferID
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}
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};
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}
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};
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}
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}
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#endif // SWIFT_MIGRATOR_MIGRATIONSTATE_H
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