include/swift/Frontend/ArgsToFrontendOptionsConverter.h

//===------ArgsToFrontendOptionsConverter.h-- --------------------*-C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

#ifndef SWIFT_FRONTEND_ARGSTOFRONTENDOPTIONSCONVERTER_H
#define SWIFT_FRONTEND_ARGSTOFRONTENDOPTIONSCONVERTER_H

#include "swift/AST/DiagnosticConsumer.h"
#include "swift/AST/DiagnosticEngine.h"
#include "swift/Frontend/FrontendOptions.h"
#include "swift/Option/Options.h"
#include "llvm/Option/ArgList.h"

#include <vector>

namespace swift {

class ArgsToFrontendOptionsConverter {
private:
  DiagnosticEngine &Diags;
  const llvm::opt::ArgList &Args;
  FrontendOptions &Opts;

  Optional<const std::vector<std::string>>
      cachedOutputFilenamesFromCommandLineOrFilelist;

  void handleDebugCrashGroupArguments();

  void computeDebugTimeOptions();
  bool computeFallbackModuleName();
  bool computeModuleName();
  bool computeMainAndSupplementaryOutputFilenames();
  void computeDumpScopeMapLocations();
  void computeHelpOptions();
  void computeImplicitImportModuleNames();
  void computeImportObjCHeaderOptions();
  void computeLLVMArgs();
  void computePlaygroundOptions();
  void computePrintStatsOptions();
  void computeTBDOptions();

  void setUnsignedIntegerArgument(options::ID optionID, unsigned max,
                                  unsigned &valueToSet);

  bool setUpForSILOrLLVM();

  bool checkUnusedSupplementaryOutputPaths() const;

  /// \returns the output filenames on the command line or in the output
  /// filelist, or an empty vector if there were neither -o's nor an output
  /// filelist.
  ArrayRef<std::string> getOutputFilenamesFromCommandLineOrFilelist();

  bool checkForUnusedOutputPaths() const;

  std::vector<std::string> readOutputFileList(StringRef filelistPath) const;

public:
  ArgsToFrontendOptionsConverter(DiagnosticEngine &Diags,
                                 const llvm::opt::ArgList &Args,
                                 FrontendOptions &Opts)
      : Diags(Diags), Args(Args), Opts(Opts) {}

  /// Populates the FrontendOptions the converter was initialized with.
  ///
  /// \param buffers If present, buffers read in the processing of the frontend
  /// options will be saved here. These should only be used for debugging
  /// purposes.
  bool convert(
      SmallVectorImpl<std::unique_ptr<llvm::MemoryBuffer>> *buffers);

  static FrontendOptions::ActionType
  determineRequestedAction(const llvm::opt::ArgList &);
};

} // namespace swift

#endif /* SWIFT_FRONTEND_ARGSTOFRONTENDOPTIONSCONVERTER_H */