YQ Connector: support managed ClickHouse

Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.

1 files changed, 689 insertions, 0 deletions

diff --git a/contrib/libs/clang14/lib/Basic/Module.cpp b/contrib/libs/clang14/lib/Basic/Module.cpp
new file mode 100644
index 00000000000..09bd3251fea
--- /dev/null
+++ b/contrib/libs/clang14/lib/Basic/Module.cpp
@@ -0,0 +1,689 @@
+//===- Module.cpp - Describe a module -------------------------------------===//
+//
+// 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 file defines the Module class, which describes a module in the source
+// code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/Module.h"
+#include "clang/Basic/CharInfo.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cassert>
+#include <functional>
+#include <string>
+#include <utility>
+#include <vector>
+
+using namespace clang;
+
+Module::Module(StringRef Name, SourceLocation DefinitionLoc, Module *Parent,
+               bool IsFramework, bool IsExplicit, unsigned VisibilityID)
+    : Name(Name), DefinitionLoc(DefinitionLoc), Parent(Parent),
+      VisibilityID(VisibilityID), IsUnimportable(false),
+      HasIncompatibleModuleFile(false), IsAvailable(true),
+      IsFromModuleFile(false), IsFramework(IsFramework), IsExplicit(IsExplicit),
+      IsSystem(false), IsExternC(false), IsInferred(false),
+      InferSubmodules(false), InferExplicitSubmodules(false),
+      InferExportWildcard(false), ConfigMacrosExhaustive(false),
+      NoUndeclaredIncludes(false), ModuleMapIsPrivate(false),
+      NameVisibility(Hidden) {
+  if (Parent) {
+    IsAvailable = Parent->isAvailable();
+    IsUnimportable = Parent->isUnimportable();
+    IsSystem = Parent->IsSystem;
+    IsExternC = Parent->IsExternC;
+    NoUndeclaredIncludes = Parent->NoUndeclaredIncludes;
+    ModuleMapIsPrivate = Parent->ModuleMapIsPrivate;
+
+    Parent->SubModuleIndex[Name] = Parent->SubModules.size();
+    Parent->SubModules.push_back(this);
+  }
+}
+
+Module::~Module() {
+  for (submodule_iterator I = submodule_begin(), IEnd = submodule_end();
+       I != IEnd; ++I) {
+    delete *I;
+  }
+}
+
+static bool isPlatformEnvironment(const TargetInfo &Target, StringRef Feature) {
+  StringRef Platform = Target.getPlatformName();
+  StringRef Env = Target.getTriple().getEnvironmentName();
+
+  // Attempt to match platform and environment.
+  if (Platform == Feature || Target.getTriple().getOSName() == Feature ||
+      Env == Feature)
+    return true;
+
+  auto CmpPlatformEnv = [](StringRef LHS, StringRef RHS) {
+    auto Pos = LHS.find('-');
+    if (Pos == StringRef::npos)
+      return false;
+    SmallString<128> NewLHS = LHS.slice(0, Pos);
+    NewLHS += LHS.slice(Pos+1, LHS.size());
+    return NewLHS == RHS;
+  };
+
+  SmallString<128> PlatformEnv = Target.getTriple().getOSAndEnvironmentName();
+  // Darwin has different but equivalent variants for simulators, example:
+  //   1. x86_64-apple-ios-simulator
+  //   2. x86_64-apple-iossimulator
+  // where both are valid examples of the same platform+environment but in the
+  // variant (2) the simulator is hardcoded as part of the platform name. Both
+  // forms above should match for "iossimulator" requirement.
+  if (Target.getTriple().isOSDarwin() && PlatformEnv.endswith("simulator"))
+    return PlatformEnv == Feature || CmpPlatformEnv(PlatformEnv, Feature);
+
+  return PlatformEnv == Feature;
+}
+
+/// Determine whether a translation unit built using the current
+/// language options has the given feature.
+static bool hasFeature(StringRef Feature, const LangOptions &LangOpts,
+                       const TargetInfo &Target) {
+  bool HasFeature = llvm::StringSwitch<bool>(Feature)
+                        .Case("altivec", LangOpts.AltiVec)
+                        .Case("blocks", LangOpts.Blocks)
+                        .Case("coroutines", LangOpts.Coroutines)
+                        .Case("cplusplus", LangOpts.CPlusPlus)
+                        .Case("cplusplus11", LangOpts.CPlusPlus11)
+                        .Case("cplusplus14", LangOpts.CPlusPlus14)
+                        .Case("cplusplus17", LangOpts.CPlusPlus17)
+                        .Case("c99", LangOpts.C99)
+                        .Case("c11", LangOpts.C11)
+                        .Case("c17", LangOpts.C17)
+                        .Case("freestanding", LangOpts.Freestanding)
+                        .Case("gnuinlineasm", LangOpts.GNUAsm)
+                        .Case("objc", LangOpts.ObjC)
+                        .Case("objc_arc", LangOpts.ObjCAutoRefCount)
+                        .Case("opencl", LangOpts.OpenCL)
+                        .Case("tls", Target.isTLSSupported())
+                        .Case("zvector", LangOpts.ZVector)
+                        .Default(Target.hasFeature(Feature) ||
+                                 isPlatformEnvironment(Target, Feature));
+  if (!HasFeature)
+    HasFeature = llvm::is_contained(LangOpts.ModuleFeatures, Feature);
+  return HasFeature;
+}
+
+bool Module::isUnimportable(const LangOptions &LangOpts,
+                            const TargetInfo &Target, Requirement &Req,
+                            Module *&ShadowingModule) const {
+  if (!IsUnimportable)
+    return false;
+
+  for (const Module *Current = this; Current; Current = Current->Parent) {
+    if (Current->ShadowingModule) {
+      ShadowingModule = Current->ShadowingModule;
+      return true;
+    }
+    for (unsigned I = 0, N = Current->Requirements.size(); I != N; ++I) {
+      if (hasFeature(Current->Requirements[I].first, LangOpts, Target) !=
+              Current->Requirements[I].second) {
+        Req = Current->Requirements[I];
+        return true;
+      }
+    }
+  }
+
+  llvm_unreachable("could not find a reason why module is unimportable");
+}
+
+bool Module::isAvailable(const LangOptions &LangOpts, const TargetInfo &Target,
+                         Requirement &Req,
+                         UnresolvedHeaderDirective &MissingHeader,
+                         Module *&ShadowingModule) const {
+  if (IsAvailable)
+    return true;
+
+  if (isUnimportable(LangOpts, Target, Req, ShadowingModule))
+    return false;
+
+  // FIXME: All missing headers are listed on the top-level module. Should we
+  // just look there?
+  for (const Module *Current = this; Current; Current = Current->Parent) {
+    if (!Current->MissingHeaders.empty()) {
+      MissingHeader = Current->MissingHeaders.front();
+      return false;
+    }
+  }
+
+  llvm_unreachable("could not find a reason why module is unavailable");
+}
+
+bool Module::isSubModuleOf(const Module *Other) const {
+  for (auto *Parent = this; Parent; Parent = Parent->Parent) {
+    if (Parent == Other)
+      return true;
+  }
+  return false;
+}
+
+const Module *Module::getTopLevelModule() const {
+  const Module *Result = this;
+  while (Result->Parent)
+    Result = Result->Parent;
+
+  return Result;
+}
+
+static StringRef getModuleNameFromComponent(
+    const std::pair<std::string, SourceLocation> &IdComponent) {
+  return IdComponent.first;
+}
+
+static StringRef getModuleNameFromComponent(StringRef R) { return R; }
+
+template<typename InputIter>
+static void printModuleId(raw_ostream &OS, InputIter Begin, InputIter End,
+                          bool AllowStringLiterals = true) {
+  for (InputIter It = Begin; It != End; ++It) {
+    if (It != Begin)
+      OS << ".";
+
+    StringRef Name = getModuleNameFromComponent(*It);
+    if (!AllowStringLiterals || isValidAsciiIdentifier(Name))
+      OS << Name;
+    else {
+      OS << '"';
+      OS.write_escaped(Name);
+      OS << '"';
+    }
+  }
+}
+
+template<typename Container>
+static void printModuleId(raw_ostream &OS, const Container &C) {
+  return printModuleId(OS, C.begin(), C.end());
+}
+
+std::string Module::getFullModuleName(bool AllowStringLiterals) const {
+  SmallVector<StringRef, 2> Names;
+
+  // Build up the set of module names (from innermost to outermost).
+  for (const Module *M = this; M; M = M->Parent)
+    Names.push_back(M->Name);
+
+  std::string Result;
+
+  llvm::raw_string_ostream Out(Result);
+  printModuleId(Out, Names.rbegin(), Names.rend(), AllowStringLiterals);
+  Out.flush();
+
+  return Result;
+}
+
+bool Module::fullModuleNameIs(ArrayRef<StringRef> nameParts) const {
+  for (const Module *M = this; M; M = M->Parent) {
+    if (nameParts.empty() || M->Name != nameParts.back())
+      return false;
+    nameParts = nameParts.drop_back();
+  }
+  return nameParts.empty();
+}
+
+Module::DirectoryName Module::getUmbrellaDir() const {
+  if (Header U = getUmbrellaHeader())
+    return {"", "", U.Entry->getDir()};
+
+  return {UmbrellaAsWritten, UmbrellaRelativeToRootModuleDirectory,
+          Umbrella.dyn_cast<const DirectoryEntry *>()};
+}
+
+void Module::addTopHeader(const FileEntry *File) {
+  assert(File);
+  TopHeaders.insert(File);
+}
+
+ArrayRef<const FileEntry *> Module::getTopHeaders(FileManager &FileMgr) {
+  if (!TopHeaderNames.empty()) {
+    for (std::vector<std::string>::iterator
+           I = TopHeaderNames.begin(), E = TopHeaderNames.end(); I != E; ++I) {
+      if (auto FE = FileMgr.getFile(*I))
+        TopHeaders.insert(*FE);
+    }
+    TopHeaderNames.clear();
+  }
+
+  return llvm::makeArrayRef(TopHeaders.begin(), TopHeaders.end());
+}
+
+bool Module::directlyUses(const Module *Requested) const {
+  auto *Top = getTopLevelModule();
+
+  // A top-level module implicitly uses itself.
+  if (Requested->isSubModuleOf(Top))
+    return true;
+
+  for (auto *Use : Top->DirectUses)
+    if (Requested->isSubModuleOf(Use))
+      return true;
+
+  // Anyone is allowed to use our builtin stddef.h and its accompanying module.
+  if (!Requested->Parent && Requested->Name == "_Builtin_stddef_max_align_t")
+    return true;
+
+  return false;
+}
+
+void Module::addRequirement(StringRef Feature, bool RequiredState,
+                            const LangOptions &LangOpts,
+                            const TargetInfo &Target) {
+  Requirements.push_back(Requirement(std::string(Feature), RequiredState));
+
+  // If this feature is currently available, we're done.
+  if (hasFeature(Feature, LangOpts, Target) == RequiredState)
+    return;
+
+  markUnavailable(/*Unimportable*/true);
+}
+
+void Module::markUnavailable(bool Unimportable) {
+  auto needUpdate = [Unimportable](Module *M) {
+    return M->IsAvailable || (!M->IsUnimportable && Unimportable);
+  };
+
+  if (!needUpdate(this))
+    return;
+
+  SmallVector<Module *, 2> Stack;
+  Stack.push_back(this);
+  while (!Stack.empty()) {
+    Module *Current = Stack.back();
+    Stack.pop_back();
+
+    if (!needUpdate(Current))
+      continue;
+
+    Current->IsAvailable = false;
+    Current->IsUnimportable |= Unimportable;
+    for (submodule_iterator Sub = Current->submodule_begin(),
+                         SubEnd = Current->submodule_end();
+         Sub != SubEnd; ++Sub) {
+      if (needUpdate(*Sub))
+        Stack.push_back(*Sub);
+    }
+  }
+}
+
+Module *Module::findSubmodule(StringRef Name) const {
+  llvm::StringMap<unsigned>::const_iterator Pos = SubModuleIndex.find(Name);
+  if (Pos == SubModuleIndex.end())
+    return nullptr;
+
+  return SubModules[Pos->getValue()];
+}
+
+Module *Module::findOrInferSubmodule(StringRef Name) {
+  llvm::StringMap<unsigned>::const_iterator Pos = SubModuleIndex.find(Name);
+  if (Pos != SubModuleIndex.end())
+    return SubModules[Pos->getValue()];
+  if (!InferSubmodules)
+    return nullptr;
+  Module *Result = new Module(Name, SourceLocation(), this, false, InferExplicitSubmodules, 0);
+  Result->InferExplicitSubmodules = InferExplicitSubmodules;
+  Result->InferSubmodules = InferSubmodules;
+  Result->InferExportWildcard = InferExportWildcard;
+  if (Result->InferExportWildcard)
+    Result->Exports.push_back(Module::ExportDecl(nullptr, true));
+  return Result;
+}
+
+void Module::getExportedModules(SmallVectorImpl<Module *> &Exported) const {
+  // All non-explicit submodules are exported.
+  for (std::vector<Module *>::const_iterator I = SubModules.begin(),
+                                             E = SubModules.end();
+       I != E; ++I) {
+    Module *Mod = *I;
+    if (!Mod->IsExplicit)
+      Exported.push_back(Mod);
+  }
+
+  // Find re-exported modules by filtering the list of imported modules.
+  bool AnyWildcard = false;
+  bool UnrestrictedWildcard = false;
+  SmallVector<Module *, 4> WildcardRestrictions;
+  for (unsigned I = 0, N = Exports.size(); I != N; ++I) {
+    Module *Mod = Exports[I].getPointer();
+    if (!Exports[I].getInt()) {
+      // Export a named module directly; no wildcards involved.
+      Exported.push_back(Mod);
+
+      continue;
+    }
+
+    // Wildcard export: export all of the imported modules that match
+    // the given pattern.
+    AnyWildcard = true;
+    if (UnrestrictedWildcard)
+      continue;
+
+    if (Module *Restriction = Exports[I].getPointer())
+      WildcardRestrictions.push_back(Restriction);
+    else {
+      WildcardRestrictions.clear();
+      UnrestrictedWildcard = true;
+    }
+  }
+
+  // If there were any wildcards, push any imported modules that were
+  // re-exported by the wildcard restriction.
+  if (!AnyWildcard)
+    return;
+
+  for (unsigned I = 0, N = Imports.size(); I != N; ++I) {
+    Module *Mod = Imports[I];
+    bool Acceptable = UnrestrictedWildcard;
+    if (!Acceptable) {
+      // Check whether this module meets one of the restrictions.
+      for (unsigned R = 0, NR = WildcardRestrictions.size(); R != NR; ++R) {
+        Module *Restriction = WildcardRestrictions[R];
+        if (Mod == Restriction || Mod->isSubModuleOf(Restriction)) {
+          Acceptable = true;
+          break;
+        }
+      }
+    }
+
+    if (!Acceptable)
+      continue;
+
+    Exported.push_back(Mod);
+  }
+}
+
+void Module::buildVisibleModulesCache() const {
+  assert(VisibleModulesCache.empty() && "cache does not need building");
+
+  // This module is visible to itself.
+  VisibleModulesCache.insert(this);
+
+  // Every imported module is visible.
+  SmallVector<Module *, 16> Stack(Imports.begin(), Imports.end());
+  while (!Stack.empty()) {
+    Module *CurrModule = Stack.pop_back_val();
+
+    // Every module transitively exported by an imported module is visible.
+    if (VisibleModulesCache.insert(CurrModule).second)
+      CurrModule->getExportedModules(Stack);
+  }
+}
+
+void Module::print(raw_ostream &OS, unsigned Indent, bool Dump) const {
+  OS.indent(Indent);
+  if (IsFramework)
+    OS << "framework ";
+  if (IsExplicit)
+    OS << "explicit ";
+  OS << "module ";
+  printModuleId(OS, &Name, &Name + 1);
+
+  if (IsSystem || IsExternC) {
+    OS.indent(Indent + 2);
+    if (IsSystem)
+      OS << " [system]";
+    if (IsExternC)
+      OS << " [extern_c]";
+  }
+
+  OS << " {\n";
+
+  if (!Requirements.empty()) {
+    OS.indent(Indent + 2);
+    OS << "requires ";
+    for (unsigned I = 0, N = Requirements.size(); I != N; ++I) {
+      if (I)
+        OS << ", ";
+      if (!Requirements[I].second)
+        OS << "!";
+      OS << Requirements[I].first;
+    }
+    OS << "\n";
+  }
+
+  if (Header H = getUmbrellaHeader()) {
+    OS.indent(Indent + 2);
+    OS << "umbrella header \"";
+    OS.write_escaped(H.NameAsWritten);
+    OS << "\"\n";
+  } else if (DirectoryName D = getUmbrellaDir()) {
+    OS.indent(Indent + 2);
+    OS << "umbrella \"";
+    OS.write_escaped(D.NameAsWritten);
+    OS << "\"\n";
+  }
+
+  if (!ConfigMacros.empty() || ConfigMacrosExhaustive) {
+    OS.indent(Indent + 2);
+    OS << "config_macros ";
+    if (ConfigMacrosExhaustive)
+      OS << "[exhaustive]";
+    for (unsigned I = 0, N = ConfigMacros.size(); I != N; ++I) {
+      if (I)
+        OS << ", ";
+      OS << ConfigMacros[I];
+    }
+    OS << "\n";
+  }
+
+  struct {
+    StringRef Prefix;
+    HeaderKind Kind;
+  } Kinds[] = {{"", HK_Normal},
+               {"textual ", HK_Textual},
+               {"private ", HK_Private},
+               {"private textual ", HK_PrivateTextual},
+               {"exclude ", HK_Excluded}};
+
+  for (auto &K : Kinds) {
+    assert(&K == &Kinds[K.Kind] && "kinds in wrong order");
+    for (auto &H : Headers[K.Kind]) {
+      OS.indent(Indent + 2);
+      OS << K.Prefix << "header \"";
+      OS.write_escaped(H.NameAsWritten);
+      OS << "\" { size " << H.Entry->getSize()
+         << " mtime " << H.Entry->getModificationTime() << " }\n";
+    }
+  }
+  for (auto *Unresolved : {&UnresolvedHeaders, &MissingHeaders}) {
+    for (auto &U : *Unresolved) {
+      OS.indent(Indent + 2);
+      OS << Kinds[U.Kind].Prefix << "header \"";
+      OS.write_escaped(U.FileName);
+      OS << "\"";
+      if (U.Size || U.ModTime) {
+        OS << " {";
+        if (U.Size)
+          OS << " size " << *U.Size;
+        if (U.ModTime)
+          OS << " mtime " << *U.ModTime;
+        OS << " }";
+      }
+      OS << "\n";
+    }
+  }
+
+  if (!ExportAsModule.empty()) {
+    OS.indent(Indent + 2);
+    OS << "export_as" << ExportAsModule << "\n";
+  }
+
+  for (submodule_const_iterator MI = submodule_begin(), MIEnd = submodule_end();
+       MI != MIEnd; ++MI)
+    // Print inferred subframework modules so that we don't need to re-infer
+    // them (requires expensive directory iteration + stat calls) when we build
+    // the module. Regular inferred submodules are OK, as we need to look at all
+    // those header files anyway.
+    if (!(*MI)->IsInferred || (*MI)->IsFramework)
+      (*MI)->print(OS, Indent + 2, Dump);
+
+  for (unsigned I = 0, N = Exports.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "export ";
+    if (Module *Restriction = Exports[I].getPointer()) {
+      OS << Restriction->getFullModuleName(true);
+      if (Exports[I].getInt())
+        OS << ".*";
+    } else {
+      OS << "*";
+    }
+    OS << "\n";
+  }
+
+  for (unsigned I = 0, N = UnresolvedExports.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "export ";
+    printModuleId(OS, UnresolvedExports[I].Id);
+    if (UnresolvedExports[I].Wildcard)
+      OS << (UnresolvedExports[I].Id.empty() ? "*" : ".*");
+    OS << "\n";
+  }
+
+  if (Dump) {
+    for (Module *M : Imports) {
+      OS.indent(Indent + 2);
+      llvm::errs() << "import " << M->getFullModuleName() << "\n";
+    }
+  }
+
+  for (unsigned I = 0, N = DirectUses.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "use ";
+    OS << DirectUses[I]->getFullModuleName(true);
+    OS << "\n";
+  }
+
+  for (unsigned I = 0, N = UnresolvedDirectUses.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "use ";
+    printModuleId(OS, UnresolvedDirectUses[I]);
+    OS << "\n";
+  }
+
+  for (unsigned I = 0, N = LinkLibraries.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "link ";
+    if (LinkLibraries[I].IsFramework)
+      OS << "framework ";
+    OS << "\"";
+    OS.write_escaped(LinkLibraries[I].Library);
+    OS << "\"";
+  }
+
+  for (unsigned I = 0, N = UnresolvedConflicts.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "conflict ";
+    printModuleId(OS, UnresolvedConflicts[I].Id);
+    OS << ", \"";
+    OS.write_escaped(UnresolvedConflicts[I].Message);
+    OS << "\"\n";
+  }
+
+  for (unsigned I = 0, N = Conflicts.size(); I != N; ++I) {
+    OS.indent(Indent + 2);
+    OS << "conflict ";
+    OS << Conflicts[I].Other->getFullModuleName(true);
+    OS << ", \"";
+    OS.write_escaped(Conflicts[I].Message);
+    OS << "\"\n";
+  }
+
+  if (InferSubmodules) {
+    OS.indent(Indent + 2);
+    if (InferExplicitSubmodules)
+      OS << "explicit ";
+    OS << "module * {\n";
+    if (InferExportWildcard) {
+      OS.indent(Indent + 4);
+      OS << "export *\n";
+    }
+    OS.indent(Indent + 2);
+    OS << "}\n";
+  }
+
+  OS.indent(Indent);
+  OS << "}\n";
+}
+
+LLVM_DUMP_METHOD void Module::dump() const {
+  print(llvm::errs(), 0, true);
+}
+
+void VisibleModuleSet::setVisible(Module *M, SourceLocation Loc,
+                                  VisibleCallback Vis, ConflictCallback Cb) {
+  assert(Loc.isValid() && "setVisible expects a valid import location");
+  if (isVisible(M))
+    return;
+
+  ++Generation;
+
+  struct Visiting {
+    Module *M;
+    Visiting *ExportedBy;
+  };
+
+  std::function<void(Visiting)> VisitModule = [&](Visiting V) {
+    // Nothing to do for a module that's already visible.
+    unsigned ID = V.M->getVisibilityID();
+    if (ImportLocs.size() <= ID)
+      ImportLocs.resize(ID + 1);
+    else if (ImportLocs[ID].isValid())
+      return;
+
+    ImportLocs[ID] = Loc;
+    Vis(M);
+
+    // Make any exported modules visible.
+    SmallVector<Module *, 16> Exports;
+    V.M->getExportedModules(Exports);
+    for (Module *E : Exports) {
+      // Don't import non-importable modules.
+      if (!E->isUnimportable())
+        VisitModule({E, &V});
+    }
+
+    for (auto &C : V.M->Conflicts) {
+      if (isVisible(C.Other)) {
+        llvm::SmallVector<Module*, 8> Path;
+        for (Visiting *I = &V; I; I = I->ExportedBy)
+          Path.push_back(I->M);
+        Cb(Path, C.Other, C.Message);
+      }
+    }
+  };
+  VisitModule({M, nullptr});
+}
+
+ASTSourceDescriptor::ASTSourceDescriptor(Module &M)
+    : Signature(M.Signature), ClangModule(&M) {
+  if (M.Directory)
+    Path = M.Directory->getName();
+  if (auto File = M.getASTFile())
+    ASTFile = File->getName();
+}
+
+std::string ASTSourceDescriptor::getModuleName() const {
+  if (ClangModule)
+    return ClangModule->Name;
+  else
+    return std::string(PCHModuleName);
+}