Export clang-format16 via ydblib project

6e6be3a95868fde888d801b7590af4044049563f

1 files changed, 250 insertions, 0 deletions

diff --git a/contrib/libs/clang16/include/clang/Frontend/Utils.h b/contrib/libs/clang16/include/clang/Frontend/Utils.h
new file mode 100644
index 0000000000..771bdc4de5
--- /dev/null
+++ b/contrib/libs/clang16/include/clang/Frontend/Utils.h
@@ -0,0 +1,250 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- Utils.h - Misc utilities for the front-end ---------------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+//  This header contains miscellaneous utilities for various front-end actions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FRONTEND_UTILS_H
+#define LLVM_CLANG_FRONTEND_UTILS_H
+
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/LLVM.h"
+#include "clang/Driver/OptionUtils.h"
+#include "clang/Frontend/DependencyOutputOptions.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/Support/FileCollector.h"
+#include "llvm/Support/VirtualFileSystem.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <system_error>
+#include <utility>
+#include <vector>
+
+namespace clang {
+
+class ASTReader;
+class CompilerInstance;
+class CompilerInvocation;
+class DiagnosticsEngine;
+class ExternalSemaSource;
+class FrontendOptions;
+class PCHContainerReader;
+class Preprocessor;
+class PreprocessorOptions;
+class PreprocessorOutputOptions;
+
+/// InitializePreprocessor - Initialize the preprocessor getting it and the
+/// environment ready to process a single file.
+void InitializePreprocessor(Preprocessor &PP, const PreprocessorOptions &PPOpts,
+                            const PCHContainerReader &PCHContainerRdr,
+                            const FrontendOptions &FEOpts);
+
+/// DoPrintPreprocessedInput - Implement -E mode.
+void DoPrintPreprocessedInput(Preprocessor &PP, raw_ostream *OS,
+                              const PreprocessorOutputOptions &Opts);
+
+/// An interface for collecting the dependencies of a compilation. Users should
+/// use \c attachToPreprocessor and \c attachToASTReader to get all of the
+/// dependencies.
+/// FIXME: Migrate DependencyGraphGen to use this interface.
+class DependencyCollector {
+public:
+  virtual ~DependencyCollector();
+
+  virtual void attachToPreprocessor(Preprocessor &PP);
+  virtual void attachToASTReader(ASTReader &R);
+  ArrayRef<std::string> getDependencies() const { return Dependencies; }
+
+  /// Called when a new file is seen. Return true if \p Filename should be added
+  /// to the list of dependencies.
+  ///
+  /// The default implementation ignores <built-in> and system files.
+  virtual bool sawDependency(StringRef Filename, bool FromModule,
+                             bool IsSystem, bool IsModuleFile, bool IsMissing);
+
+  /// Called when the end of the main file is reached.
+  virtual void finishedMainFile(DiagnosticsEngine &Diags) {}
+
+  /// Return true if system files should be passed to sawDependency().
+  virtual bool needSystemDependencies() { return false; }
+
+  /// Add a dependency \p Filename if it has not been seen before and
+  /// sawDependency() returns true.
+  virtual void maybeAddDependency(StringRef Filename, bool FromModule,
+                                  bool IsSystem, bool IsModuleFile,
+                                  bool IsMissing);
+
+protected:
+  /// Return true if the filename was added to the list of dependencies, false
+  /// otherwise.
+  bool addDependency(StringRef Filename);
+
+private:
+  llvm::StringSet<> Seen;
+  std::vector<std::string> Dependencies;
+};
+
+/// Builds a dependency file when attached to a Preprocessor (for includes) and
+/// ASTReader (for module imports), and writes it out at the end of processing
+/// a source file.  Users should attach to the ast reader whenever a module is
+/// loaded.
+class DependencyFileGenerator : public DependencyCollector {
+public:
+  DependencyFileGenerator(const DependencyOutputOptions &Opts);
+
+  void attachToPreprocessor(Preprocessor &PP) override;
+
+  void finishedMainFile(DiagnosticsEngine &Diags) override;
+
+  bool needSystemDependencies() final { return IncludeSystemHeaders; }
+
+  bool sawDependency(StringRef Filename, bool FromModule, bool IsSystem,
+                     bool IsModuleFile, bool IsMissing) final;
+
+protected:
+  void outputDependencyFile(llvm::raw_ostream &OS);
+
+private:
+  void outputDependencyFile(DiagnosticsEngine &Diags);
+
+  std::string OutputFile;
+  std::vector<std::string> Targets;
+  bool IncludeSystemHeaders;
+  bool PhonyTarget;
+  bool AddMissingHeaderDeps;
+  bool SeenMissingHeader;
+  bool IncludeModuleFiles;
+  DependencyOutputFormat OutputFormat;
+  unsigned InputFileIndex;
+};
+
+/// Collects the dependencies for imported modules into a directory.  Users
+/// should attach to the AST reader whenever a module is loaded.
+class ModuleDependencyCollector : public DependencyCollector {
+  std::string DestDir;
+  bool HasErrors = false;
+  llvm::StringSet<> Seen;
+  llvm::vfs::YAMLVFSWriter VFSWriter;
+  llvm::FileCollector::PathCanonicalizer Canonicalizer;
+
+  std::error_code copyToRoot(StringRef Src, StringRef Dst = {});
+
+public:
+  ModuleDependencyCollector(std::string DestDir)
+      : DestDir(std::move(DestDir)) {}
+  ~ModuleDependencyCollector() override { writeFileMap(); }
+
+  StringRef getDest() { return DestDir; }
+  virtual bool insertSeen(StringRef Filename) { return Seen.insert(Filename).second; }
+  virtual void addFile(StringRef Filename, StringRef FileDst = {});
+
+  virtual void addFileMapping(StringRef VPath, StringRef RPath) {
+    VFSWriter.addFileMapping(VPath, RPath);
+  }
+
+  void attachToPreprocessor(Preprocessor &PP) override;
+  void attachToASTReader(ASTReader &R) override;
+
+  virtual void writeFileMap();
+  virtual bool hasErrors() { return HasErrors; }
+};
+
+/// AttachDependencyGraphGen - Create a dependency graph generator, and attach
+/// it to the given preprocessor.
+void AttachDependencyGraphGen(Preprocessor &PP, StringRef OutputFile,
+                              StringRef SysRoot);
+
+/// AttachHeaderIncludeGen - Create a header include list generator, and attach
+/// it to the given preprocessor.
+///
+/// \param DepOpts - Options controlling the output.
+/// \param ShowAllHeaders - If true, show all header information instead of just
+/// headers following the predefines buffer. This is useful for making sure
+/// includes mentioned on the command line are also reported, but differs from
+/// the default behavior used by -H.
+/// \param OutputPath - If non-empty, a path to write the header include
+/// information to, instead of writing to stderr.
+/// \param ShowDepth - Whether to indent to show the nesting of the includes.
+/// \param MSStyle - Whether to print in cl.exe /showIncludes style.
+void AttachHeaderIncludeGen(Preprocessor &PP,
+                            const DependencyOutputOptions &DepOpts,
+                            bool ShowAllHeaders = false,
+                            StringRef OutputPath = {},
+                            bool ShowDepth = true, bool MSStyle = false);
+
+/// The ChainedIncludesSource class converts headers to chained PCHs in
+/// memory, mainly for testing.
+IntrusiveRefCntPtr<ExternalSemaSource>
+createChainedIncludesSource(CompilerInstance &CI,
+                            IntrusiveRefCntPtr<ExternalSemaSource> &Reader);
+
+/// Optional inputs to createInvocation.
+struct CreateInvocationOptions {
+  /// Receives diagnostics encountered while parsing command-line flags.
+  /// If not provided, these are printed to stderr.
+  IntrusiveRefCntPtr<DiagnosticsEngine> Diags = nullptr;
+  /// Used e.g. to probe for system headers locations.
+  /// If not provided, the real filesystem is used.
+  /// FIXME: the driver does perform some non-virtualized IO.
+  IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr;
+  /// Whether to attempt to produce a non-null (possibly incorrect) invocation
+  /// if any errors were encountered.
+  /// By default, always return null on errors.
+  bool RecoverOnError = false;
+  /// Allow the driver to probe the filesystem for PCH files.
+  /// This is used to replace -include with -include-pch in the cc1 args.
+  /// FIXME: ProbePrecompiled=true is a poor, historical default.
+  /// It misbehaves if the PCH file is from GCC, has the wrong version, etc.
+  bool ProbePrecompiled = false;
+  /// If set, the target is populated with the cc1 args produced by the driver.
+  /// This may be populated even if createInvocation returns nullptr.
+  std::vector<std::string> *CC1Args = nullptr;
+};
+
+/// Interpret clang arguments in preparation to parse a file.
+///
+/// This simulates a number of steps Clang takes when its driver is invoked:
+/// - choosing actions (e.g compile + link) to run
+/// - probing the system for settings like standard library locations
+/// - spawning a cc1 subprocess to compile code, with more explicit arguments
+/// - in the cc1 process, assembling those arguments into a CompilerInvocation
+///   which is used to configure the parser
+///
+/// This simulation is lossy, e.g. in some situations one driver run would
+/// result in multiple parses. (Multi-arch, CUDA, ...).
+/// This function tries to select a reasonable invocation that tools should use.
+///
+/// Args[0] should be the driver name, such as "clang" or "/usr/bin/g++".
+/// Absolute path is preferred - this affects searching for system headers.
+///
+/// May return nullptr if an invocation could not be determined.
+/// See CreateInvocationOptions::ShouldRecoverOnErrors to try harder!
+std::unique_ptr<CompilerInvocation>
+createInvocation(ArrayRef<const char *> Args,
+                 CreateInvocationOptions Opts = {});
+
+} // namespace clang
+
+#endif // LLVM_CLANG_FRONTEND_UTILS_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif