//===- FrontendOptions.h ----------------------------------------*- 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

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_FRONTEND_FRONTENDOPTIONS_H

#define LLVM_CLANG_FRONTEND_FRONTENDOPTIONS_H

#include "clang/AST/ASTDumperUtils.h"

#include "clang/Basic/LangStandard.h"

#include "clang/Frontend/CommandLineSourceLoc.h"

#include "clang/Sema/CodeCompleteOptions.h"

#include "clang/Serialization/ModuleFileExtension.h"

#include "llvm/ADT/StringRef.h"

#include "llvm/Support/MemoryBuffer.h"

#include <cassert>

#include <map>

#include <memory>

#include <string>

#include <vector>

namespace llvm {

class MemoryBuffer;

} // namespace llvm

namespace clang {

namespace frontend {

enum ActionKind {

  /// Parse ASTs and list Decl nodes.

  ASTDeclList,

  /// Parse ASTs and dump them.

  ASTDump,

  /// Parse ASTs and print them.

  ASTPrint,

  /// Parse ASTs and view them in Graphviz.

  ASTView,

  /// Dump the compiler configuration.

  DumpCompilerOptions,

  /// Dump out raw tokens.

  DumpRawTokens,

  /// Dump out preprocessed tokens.

  DumpTokens,

  /// Emit a .s file.

  EmitAssembly,

  /// Emit a .bc file.

  EmitBC,

  /// Translate input source into HTML.

  EmitHTML,

  /// Emit a .ll file.

  EmitLLVM,

  /// Generate LLVM IR, but do not emit anything.

  EmitLLVMOnly,

  /// Generate machine code, but don't emit anything.

  EmitCodeGenOnly,

  /// Emit a .o file.

  EmitObj,

  // Extract API information

  ExtractAPI,

  /// Parse and apply any fixits to the source.

  FixIt,

  /// Generate pre-compiled module from a module map.

  GenerateModule,

  /// Generate pre-compiled module from a C++ module interface file.

  GenerateModuleInterface,

  /// Generate pre-compiled module from a set of header files.

  GenerateHeaderModule,

  /// Generate a C++20 header unit module from a header file.

  GenerateHeaderUnit,

  /// Generate pre-compiled header.

  GeneratePCH,

  /// Generate Interface Stub Files.

  GenerateInterfaceStubs,

  /// Only execute frontend initialization.

  InitOnly,

  /// Dump information about a module file.

  ModuleFileInfo,

  /// Load and verify that a PCH file is usable.

  VerifyPCH,

  /// Parse and perform semantic analysis.

  ParseSyntaxOnly,

  /// Run a plugin action, \see ActionName.

  PluginAction,

  /// Print the "preamble" of the input file

  PrintPreamble,

  /// -E mode.

  PrintPreprocessedInput,

  /// Expand macros but not \#includes.

  RewriteMacros,

  /// ObjC->C Rewriter.

  RewriteObjC,

  /// Rewriter playground

  RewriteTest,

  /// Run one or more source code analyses.

  RunAnalysis,

  /// Dump template instantiations

  TemplightDump,

  /// Run migrator.

  MigrateSource,

  /// Just lex, no output.

  RunPreprocessorOnly,

  /// Print the output of the dependency directives source minimizer.

  PrintDependencyDirectivesSourceMinimizerOutput

};

} // namespace frontend

/// The kind of a file that we've been handed as an input.

class InputKind {

private:

  Language Lang;

  unsigned Fmt : 3;

  unsigned Preprocessed : 1;

  unsigned HeaderUnit : 3;

  unsigned IsHeader : 1;

public:

  /// The input file format.

  enum Format {

    Source,

    ModuleMap,

    Precompiled

  };

  // If we are building a header unit, what kind it is; this affects whether

  // we look for the file in the user or system include search paths before

  // flagging a missing input.

  enum HeaderUnitKind {

    HeaderUnit_None,

    HeaderUnit_User,

    HeaderUnit_System,

    HeaderUnit_Abs

  };

  constexpr InputKind(Language L = Language::Unknown, Format F = Source,

                      bool PP = false, HeaderUnitKind HU = HeaderUnit_None,

                      bool HD = false)

      : Lang(L), Fmt(F), Preprocessed(PP), HeaderUnit(HU), IsHeader(HD) {}

  Language getLanguage() const { return static_cast<Language>(Lang); }

  Format getFormat() const { return static_cast<Format>(Fmt); }

  HeaderUnitKind getHeaderUnitKind() const {

    return static_cast<HeaderUnitKind>(HeaderUnit);

  }

  bool isPreprocessed() const { return Preprocessed; }

  bool isHeader() const { return IsHeader; }

  bool isHeaderUnit() const { return HeaderUnit != HeaderUnit_None; }

  /// Is the input kind fully-unknown?

  bool isUnknown() const { return Lang == Language::Unknown && 
Fmt == Source25.3k
; }

  /// Is the language of the input some dialect of Objective-C?

  bool isObjectiveC() const {

    return Lang == Language::ObjC || 
Lang == Language::ObjCXX8.02k
;

  }

  InputKind getPreprocessed() const {

    return InputKind(getLanguage(), getFormat(), true, getHeaderUnitKind(),

                     isHeader());

  }

  InputKind getHeader() const {

    return InputKind(getLanguage(), getFormat(), isPreprocessed(),

                     getHeaderUnitKind(), true);

  }

  InputKind withHeaderUnit(HeaderUnitKind HU) const {

    return InputKind(getLanguage(), getFormat(), isPreprocessed(), HU,

                     isHeader());

  }

  InputKind withFormat(Format F) const {

    return InputKind(getLanguage(), F, isPreprocessed(), getHeaderUnitKind(),

                     isHeader());

  }

};

/// An input file for the front end.

class FrontendInputFile {

  /// The file name, or "-" to read from standard input.

  std::string File;

  /// The input, if it comes from a buffer rather than a file. This object

  /// does not own the buffer, and the caller is responsible for ensuring

  /// that it outlives any users.

  llvm::Optional<llvm::MemoryBufferRef> Buffer;

  /// The kind of input, e.g., C source, AST file, LLVM IR.

  InputKind Kind;

  /// Whether we're dealing with a 'system' input (vs. a 'user' input).

  bool IsSystem = false;

public:

  FrontendInputFile() = default;

  FrontendInputFile(StringRef File, InputKind Kind, bool IsSystem = false)

      : File(File.str()), Kind(Kind), IsSystem(IsSystem) {}

  FrontendInputFile(llvm::MemoryBufferRef Buffer, InputKind Kind,

                    bool IsSystem = false)

      : Buffer(Buffer), Kind(Kind), IsSystem(IsSystem) {}

  InputKind getKind() const { return Kind; }

  bool isSystem() const { return IsSystem; }

  bool isEmpty() const { return File.empty() && 
Buffer == None77
; }

  bool isFile() const { return !isBuffer(); }

  bool isBuffer() const { return Buffer != None; }

  bool isPreprocessed() const { return Kind.isPreprocessed(); }

  bool isHeader() const { return Kind.isHeader(); }

  InputKind::HeaderUnitKind getHeaderUnitKind() const {

    return Kind.getHeaderUnitKind();

  }

  StringRef getFile() const {

    assert(isFile());

    return File;

  }

  llvm::MemoryBufferRef getBuffer() const {

    assert(isBuffer());

    return *Buffer;

  }

};

/// FrontendOptions - Options for controlling the behavior of the frontend.

class FrontendOptions {

public:

  /// Disable memory freeing on exit.

  unsigned DisableFree : 1;

  /// When generating PCH files, instruct the AST writer to create relocatable

  /// PCH files.

  unsigned RelocatablePCH : 1;

  /// Show the -help text.

  unsigned ShowHelp : 1;

  /// Show frontend performance metrics and statistics.

  unsigned ShowStats : 1;

  /// print the supported cpus for the current target

  unsigned PrintSupportedCPUs : 1;

  /// Output time trace profile.

  unsigned TimeTrace : 1;

  /// Show the -version text.

  unsigned ShowVersion : 1;

  /// Apply fixes even if there are unfixable errors.

  unsigned FixWhatYouCan : 1;

  /// Apply fixes only for warnings.

  unsigned FixOnlyWarnings : 1;

  /// Apply fixes and recompile.

  unsigned FixAndRecompile : 1;

  /// Apply fixes to temporary files.

  unsigned FixToTemporaries : 1;

  /// Emit ARC errors even if the migrator can fix them.

  unsigned ARCMTMigrateEmitARCErrors : 1;

  /// Skip over function bodies to speed up parsing in cases you do not need

  /// them (e.g. with code completion).

  unsigned SkipFunctionBodies : 1;

  /// Whether we can use the global module index if available.

  unsigned UseGlobalModuleIndex : 1;

  /// Whether we can generate the global module index if needed.

  unsigned GenerateGlobalModuleIndex : 1;

  /// Whether we include declaration dumps in AST dumps.

  unsigned ASTDumpDecls : 1;

  /// Whether we deserialize all decls when forming AST dumps.

  unsigned ASTDumpAll : 1;

  /// Whether we include lookup table dumps in AST dumps.

  unsigned ASTDumpLookups : 1;

  /// Whether we include declaration type dumps in AST dumps.

  unsigned ASTDumpDeclTypes : 1;

  /// Whether we are performing an implicit module build.

  unsigned BuildingImplicitModule : 1;

  /// Whether to use a filesystem lock when building implicit modules.

  unsigned BuildingImplicitModuleUsesLock : 1;

  /// Whether we should embed all used files into the PCM file.

  unsigned ModulesEmbedAllFiles : 1;

  /// Whether timestamps should be written to the produced PCH file.

  unsigned IncludeTimestamps : 1;

  /// Should a temporary file be used during compilation.

  unsigned UseTemporary : 1;

  /// When using -emit-module, treat the modulemap as a system module.

  unsigned IsSystemModule : 1;

  /// Output (and read) PCM files regardless of compiler errors.

  unsigned AllowPCMWithCompilerErrors : 1;

  CodeCompleteOptions CodeCompleteOpts;

  /// Specifies the output format of the AST.

  ASTDumpOutputFormat ASTDumpFormat = ADOF_Default;

  enum {

    ARCMT_None,

    ARCMT_Check,

    ARCMT_Modify,

    ARCMT_Migrate

  } ARCMTAction = ARCMT_None;

  enum {

    ObjCMT_None = 0,

    /// Enable migration to modern ObjC literals.

    ObjCMT_Literals = 0x1,

    /// Enable migration to modern ObjC subscripting.

    ObjCMT_Subscripting = 0x2,

    /// Enable migration to modern ObjC readonly property.

    ObjCMT_ReadonlyProperty = 0x4,

    /// Enable migration to modern ObjC readwrite property.

    ObjCMT_ReadwriteProperty = 0x8,

    /// Enable migration to modern ObjC property.

    ObjCMT_Property = (ObjCMT_ReadonlyProperty | ObjCMT_ReadwriteProperty),

    /// Enable annotation of ObjCMethods of all kinds.

    ObjCMT_Annotation = 0x10,

    /// Enable migration of ObjC methods to 'instancetype'.

    ObjCMT_Instancetype = 0x20,

    /// Enable migration to NS_ENUM/NS_OPTIONS macros.

    ObjCMT_NsMacros = 0x40,

    /// Enable migration to add conforming protocols.

    ObjCMT_ProtocolConformance = 0x80,

    /// prefer 'atomic' property over 'nonatomic'.

    ObjCMT_AtomicProperty = 0x100,

    /// annotate property with NS_RETURNS_INNER_POINTER

    ObjCMT_ReturnsInnerPointerProperty = 0x200,

    /// use NS_NONATOMIC_IOSONLY for property 'atomic' attribute

    ObjCMT_NsAtomicIOSOnlyProperty = 0x400,

    /// Enable inferring NS_DESIGNATED_INITIALIZER for ObjC methods.

    ObjCMT_DesignatedInitializer = 0x800,

    /// Enable converting setter/getter expressions to property-dot syntx.

    ObjCMT_PropertyDotSyntax = 0x1000,

    ObjCMT_MigrateDecls = (ObjCMT_ReadonlyProperty | ObjCMT_ReadwriteProperty |

                           ObjCMT_Annotation | ObjCMT_Instancetype |

                           ObjCMT_NsMacros | ObjCMT_ProtocolConformance |

                           ObjCMT_NsAtomicIOSOnlyProperty |

                           ObjCMT_DesignatedInitializer),

    ObjCMT_MigrateAll = (ObjCMT_Literals | ObjCMT_Subscripting |

                         ObjCMT_MigrateDecls | ObjCMT_PropertyDotSyntax)

  };

  unsigned ObjCMTAction = ObjCMT_None;

  std::string ObjCMTAllowListPath;

  std::string MTMigrateDir;

  std::string ARCMTMigrateReportOut;

  /// The input kind, either specified via -x argument or deduced from the input

  /// file name.

  InputKind DashX;

  /// The input files and their types.

  SmallVector<FrontendInputFile, 0> Inputs;

  /// When the input is a module map, the original module map file from which

  /// that map was inferred, if any (for umbrella modules).

  std::string OriginalModuleMap;

  /// The output file, if any.

  std::string OutputFile;

  /// If given, the new suffix for fix-it rewritten files.

  std::string FixItSuffix;

  /// If given, filter dumped AST Decl nodes by this substring.

  std::string ASTDumpFilter;

  /// If given, enable code completion at the provided location.

  ParsedSourceLocation CodeCompletionAt;

  /// The frontend action to perform.

  frontend::ActionKind ProgramAction = frontend::ParseSyntaxOnly;

  /// The name of the action to run when using a plugin action.

  std::string ActionName;

  // Currently this is only used as part of the `-extract-api` action.

  /// The name of the product the input files belong too.

  std::string ProductName;

  /// Args to pass to the plugins

  std::map<std::string, std::vector<std::string>> PluginArgs;

  /// The list of plugin actions to run in addition to the normal action.

  std::vector<std::string> AddPluginActions;

  /// The list of plugins to load.

  std::vector<std::string> Plugins;

  /// The list of module file extensions.

  std::vector<std::shared_ptr<ModuleFileExtension>> ModuleFileExtensions;

  /// The list of module map files to load before processing the input.

  std::vector<std::string> ModuleMapFiles;

  /// The list of additional prebuilt module files to load before

  /// processing the input.

  std::vector<std::string> ModuleFiles;

  /// The list of files to embed into the compiled module file.

  std::vector<std::string> ModulesEmbedFiles;

  /// The list of AST files to merge.

  std::vector<std::string> ASTMergeFiles;

  /// A list of arguments to forward to LLVM's option processing; this

  /// should only be used for debugging and experimental features.

  std::vector<std::string> LLVMArgs;

  /// File name of the file that will provide record layouts

  /// (in the format produced by -fdump-record-layouts).

  std::string OverrideRecordLayoutsFile;

  /// Auxiliary triple for CUDA/HIP compilation.

  std::string AuxTriple;

  /// Auxiliary target CPU for CUDA/HIP compilation.

  Optional<std::string> AuxTargetCPU;

  /// Auxiliary target features for CUDA/HIP compilation.

  Optional<std::vector<std::string>> AuxTargetFeatures;

  /// Filename to write statistics to.

  std::string StatsFile;

  /// Minimum time granularity (in microseconds) traced by time profiler.

  unsigned TimeTraceGranularity;

  /// Path which stores the output files for -ftime-trace

  std::string TimeTracePath;

public:

  FrontendOptions()

      : DisableFree(false), RelocatablePCH(false), ShowHelp(false),

        ShowStats(false), TimeTrace(false), ShowVersion(false),

        FixWhatYouCan(false), FixOnlyWarnings(false), FixAndRecompile(false),

        FixToTemporaries(false), ARCMTMigrateEmitARCErrors(false),

        SkipFunctionBodies(false), UseGlobalModuleIndex(true),

        GenerateGlobalModuleIndex(true), ASTDumpDecls(false),

        ASTDumpLookups(false), BuildingImplicitModule(false),

        BuildingImplicitModuleUsesLock(true), ModulesEmbedAllFiles(false),

        IncludeTimestamps(true), UseTemporary(true),

        AllowPCMWithCompilerErrors(false), TimeTraceGranularity(500) {}

  /// getInputKindForExtension - Return the appropriate input kind for a file

  /// extension. For example, "c" would return Language::C.

  ///

  /// \return The input kind for the extension, or Language::Unknown if the

  /// extension is not recognized.

  static InputKind getInputKindForExtension(StringRef Extension);

};

} // namespace clang

#endif // LLVM_CLANG_FRONTEND_FRONTENDOPTIONS_H