C++ Identifier::empty方法代码示例

int Identifier::compare(Identifier other) const {
  // Handle empty identifiers.
  if (empty() || other.empty()) {
    if (empty() != other.empty()) {
      return other.empty() ? -1 : 1;
    }

    return 0;
  }

  return str().compare(other.str());
}

static void addParameters(ArrayRef<Identifier> &ArgNames,
                          const ParameterList *paramList,
                          TextEntity &Ent,
                          SourceManager &SM,
                          unsigned BufferID) {
  for (auto &param : *paramList) {
    StringRef Arg;
    if (!ArgNames.empty()) {
      Identifier Id = ArgNames.front();
      Arg = Id.empty() ? "_" : Id.str();
      ArgNames = ArgNames.slice(1);
    }

    if (auto typeRepr = param->getTypeLoc().getTypeRepr()) {
      SourceRange TypeRange = param->getTypeLoc().getSourceRange();
      if (auto InOutTyR = dyn_cast_or_null<InOutTypeRepr>(typeRepr))
        TypeRange = InOutTyR->getBase()->getSourceRange();
      if (TypeRange.isInvalid())
        continue;
      
      unsigned StartOffs = SM.getLocOffsetInBuffer(TypeRange.Start, BufferID);
      unsigned EndOffs =
        SM.getLocOffsetInBuffer(Lexer::getLocForEndOfToken(SM, TypeRange.End),
                                BufferID);
      TextRange TR{ StartOffs, EndOffs-StartOffs };
      TextEntity Param(param, Arg, TR, StartOffs);
      Ent.SubEntities.push_back(std::move(Param));
    }
  }
}

bool SemaAnnotator::passCallArgNames(Expr *Fn, TupleExpr *TupleE) {
  ValueDecl *D = extractDecl(Fn);
  if (!D)
    return true; // continue.

  ArrayRef<Identifier> ArgNames = TupleE->getElementNames();
  ArrayRef<SourceLoc> ArgLocs = TupleE->getElementNameLocs();
  for (auto i : indices(ArgNames)) {
    Identifier Name = ArgNames[i];
    if (Name.empty())
      continue;

    SourceLoc Loc = ArgLocs[i];
    if (Loc.isInvalid())
      continue;

    CharSourceRange Range{ Loc, Name.getLength() };
    bool Continue = SEWalker.visitCallArgName(Name, Range, D);
    if (!Continue) {
      Cancelled = true;
      return false;
    }
  }

  return true;
}

bool Identifier::validateID(const std::string & strPurportedID)
{
    if (strPurportedID.empty())
        return false;
    Identifier theID;
    const String strID(strPurportedID);
    App::Me().Crypto().Util().SetIDFromEncoded(strID, theID);
    return !theID.empty();
}

bool Blockchain::StoreOutgoing(
    const Identifier& senderNymID,
    const Identifier& accountID,
    const Identifier& recipientContactID,
    const proto::BlockchainTransaction& transaction) const
{
    LOCK_ACCOUNT()

    const std::string sNymID = senderNymID.str();
    const std::string sAccountID = accountID.str();
    auto account = load_account(accountLock, sNymID, sAccountID);

    if (false == bool(account)) {
        otErr << OT_METHOD << __FUNCTION__ << ": Account does not exist."
              << std::endl;

        return false;
    }

    const auto& txid = transaction.txid();
    account->add_outgoing(txid);
    auto saved = api_.Storage().Store(sNymID, account->type(), *account);

    if (false == saved) {
        otErr << OT_METHOD << __FUNCTION__ << ": Failed to save account."
              << std::endl;

        return false;
    }

    saved = api_.Storage().Store(transaction);

    if (false == saved) {
        otErr << OT_METHOD << __FUNCTION__ << ": Failed to save transaction."
              << std::endl;

        return false;
    }

    if (recipientContactID.empty()) { return true; }

    return activity_.AddBlockchainTransaction(
        senderNymID,
        recipientContactID,
        StorageBox::OUTGOINGBLOCKCHAIN,
        transaction);
}

static void addParameters(ArrayRef<Identifier> &ArgNames,
                          const Pattern *Pat,
                          TextEntity &Ent,
                          SourceManager &SM,
                          unsigned BufferID) {
  if (auto ParenPat = dyn_cast<ParenPattern>(Pat)) {
    addParameters(ArgNames, ParenPat->getSubPattern(), Ent, SM, BufferID);
    return;
  }

  if (auto Tuple = dyn_cast<TuplePattern>(Pat)) {
    for (const auto &Elt : Tuple->getElements())
      addParameters(ArgNames, Elt.getPattern(), Ent, SM, BufferID);

    return;
  }

  StringRef Arg;
  if (!ArgNames.empty()) {
    Identifier Id = ArgNames.front();
    Arg = Id.empty() ? "_" : Id.str();
    ArgNames = ArgNames.slice(1);
  }

  if (auto Typed = dyn_cast<TypedPattern>(Pat)) {
    VarDecl *VD = nullptr;
    if (auto Named = dyn_cast<NamedPattern>(Typed->getSubPattern())) {
      VD = Named->getDecl();
    }
    SourceRange TypeRange = Typed->getTypeLoc().getSourceRange();
    if (auto InOutTyR =
        dyn_cast_or_null<InOutTypeRepr>(Typed->getTypeLoc().getTypeRepr())) {
      TypeRange = InOutTyR->getBase()->getSourceRange();
    }
    if (TypeRange.isInvalid())
      return;
    unsigned StartOffs = SM.getLocOffsetInBuffer(TypeRange.Start, BufferID);
    unsigned EndOffs =
      SM.getLocOffsetInBuffer(Lexer::getLocForEndOfToken(SM, TypeRange.End),
                              BufferID);
    TextRange TR{ StartOffs, EndOffs-StartOffs };
    TextEntity Param(VD, Arg, TR, StartOffs);
    Ent.SubEntities.push_back(std::move(Param));
  }
}

/// Returns a string representation of the SubPath
/// suitable for use in diagnostic text. Only supports the Projections
/// that stored-property relaxation supports: struct stored properties
/// and tuple elements.
std::string AccessSummaryAnalysis::getSubPathDescription(
    SILType baseType, const IndexTrieNode *subPath, SILModule &M) {
  // Walk the trie to the root to collect the sequence (in reverse order).
  llvm::SmallVector<unsigned, 4> reversedIndices;
  const IndexTrieNode *I = subPath;
  while (!I->isRoot()) {
    reversedIndices.push_back(I->getIndex());
    I = I->getParent();
  }

  std::string sbuf;
  llvm::raw_string_ostream os(sbuf);

  SILType containingType = baseType;
  for (unsigned index : reversed(reversedIndices)) {
    os << ".";

    if (StructDecl *D = containingType.getStructOrBoundGenericStruct()) {
      auto iter = D->getStoredProperties().begin();
      std::advance(iter, index);
      VarDecl *var = *iter;
      os << var->getBaseName();
      containingType = containingType.getFieldType(var, M);
      continue;
    }

    if (auto tupleTy = containingType.getAs<TupleType>()) {
      Identifier elementName = tupleTy->getElement(index).getName();
      if (elementName.empty())
        os << index;
      else
        os << elementName;
      containingType = containingType.getTupleElementType(index);
      continue;
    }

    llvm_unreachable("Unexpected type in projection SubPath!");
  }

  return os.str();
}

static void filterForDiscriminator(SmallVectorImpl<Result> &results,
                                   DebuggerClient *debugClient) {
  Identifier discriminator = debugClient->getPreferredPrivateDiscriminator();
  if (discriminator.empty())
    return;

  auto doesNotMatch = [discriminator](Result next) -> bool {
    return !matchesDiscriminator(discriminator, next);
  };

  auto lastMatchIter = std::find_if_not(results.rbegin(), results.rend(),
                                        doesNotMatch);
  if (lastMatchIter == results.rend())
    return;

  Result lastMatch = *lastMatchIter;

  auto newEnd = std::remove_if(results.begin(), lastMatchIter.base()-1,
                               doesNotMatch);
  results.erase(newEnd, results.end());
  results.push_back(lastMatch);
}

Identifier ModuleFile::getDiscriminatorForPrivateValue(const ValueDecl *D) {
  Identifier discriminator = PrivateDiscriminatorsByValue.lookup(D);
  assert(!discriminator.empty() && "no discriminator found for decl");
  return discriminator;
}

void TypeChecker::checkForForbiddenPrefix(Identifier Ident) {
  if (!hasEnabledForbiddenTypecheckPrefix())
    return;
  checkForForbiddenPrefix(Ident.empty() ? StringRef() : Ident.str());
}

Identifier
SerializedASTFile::getDiscriminatorForPrivateValue(const ValueDecl *D) const {
  Identifier discriminator = File.getDiscriminatorForPrivateValue(D);
  assert(!discriminator.empty() && "no discriminator found for value");
  return discriminator;
}

/// Performs the compile requested by the user.
/// \returns true on error
static bool performCompile(CompilerInstance &Instance,
                           CompilerInvocation &Invocation,
                           ArrayRef<const char *> Args,
                           int &ReturnValue) {
  FrontendOptions opts = Invocation.getFrontendOptions();
  FrontendOptions::ActionType Action = opts.RequestedAction;

  IRGenOptions &IRGenOpts = Invocation.getIRGenOptions();

  bool inputIsLLVMIr = Invocation.getInputKind() == InputFileKind::IFK_LLVM_IR;
  if (inputIsLLVMIr) {
    auto &LLVMContext = llvm::getGlobalContext();

    // Load in bitcode file.
    assert(Invocation.getInputFilenames().size() == 1 &&
           "We expect a single input for bitcode input!");
    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> FileBufOrErr =
      llvm::MemoryBuffer::getFileOrSTDIN(Invocation.getInputFilenames()[0]);
    if (!FileBufOrErr) {
      Instance.getASTContext().Diags.diagnose(SourceLoc(),
                                              diag::error_open_input_file,
                                              Invocation.getInputFilenames()[0],
                                              FileBufOrErr.getError().message());
      return true;
    }
    llvm::MemoryBuffer *MainFile = FileBufOrErr.get().get();

    llvm::SMDiagnostic Err;
    std::unique_ptr<llvm::Module> Module = llvm::parseIR(
                                             MainFile->getMemBufferRef(),
                                             Err, LLVMContext);
    if (!Module) {
      // TODO: Translate from the diagnostic info to the SourceManager location
      // if available.
      Instance.getASTContext().Diags.diagnose(SourceLoc(),
                                              diag::error_parse_input_file,
                                              Invocation.getInputFilenames()[0],
                                              Err.getMessage());
      return true;
    }

    // TODO: remove once the frontend understands what action it should perform
    IRGenOpts.OutputKind = getOutputKind(Action);

    return performLLVM(IRGenOpts, Instance.getASTContext(), Module.get());
  }

  ReferencedNameTracker nameTracker;
  bool shouldTrackReferences = !opts.ReferenceDependenciesFilePath.empty();
  if (shouldTrackReferences)
    Instance.setReferencedNameTracker(&nameTracker);

  if (Action == FrontendOptions::DumpParse ||
      Action == FrontendOptions::DumpInterfaceHash)
    Instance.performParseOnly();
  else
    Instance.performSema();

  FrontendOptions::DebugCrashMode CrashMode = opts.CrashMode;
  if (CrashMode == FrontendOptions::DebugCrashMode::AssertAfterParse)
    debugFailWithAssertion();
  else if (CrashMode == FrontendOptions::DebugCrashMode::CrashAfterParse)
    debugFailWithCrash();

  ASTContext &Context = Instance.getASTContext();

  if (Action == FrontendOptions::REPL) {
    runREPL(Instance, ProcessCmdLine(Args.begin(), Args.end()),
            Invocation.getParseStdlib());
    return false;
  }

  SourceFile *PrimarySourceFile = Instance.getPrimarySourceFile();

  // We've been told to dump the AST (either after parsing or type-checking,
  // which is already differentiated in CompilerInstance::performSema()),
  // so dump or print the main source file and return.
  if (Action == FrontendOptions::DumpParse ||
      Action == FrontendOptions::DumpAST ||
      Action == FrontendOptions::PrintAST ||
      Action == FrontendOptions::DumpTypeRefinementContexts ||
      Action == FrontendOptions::DumpInterfaceHash) {
    SourceFile *SF = PrimarySourceFile;
    if (!SF) {
      SourceFileKind Kind = Invocation.getSourceFileKind();
      SF = &Instance.getMainModule()->getMainSourceFile(Kind);
    }
    if (Action == FrontendOptions::PrintAST)
      SF->print(llvm::outs(), PrintOptions::printEverything());
    else if (Action == FrontendOptions::DumpTypeRefinementContexts)
      SF->getTypeRefinementContext()->dump(llvm::errs(), Context.SourceMgr);
    else if (Action == FrontendOptions::DumpInterfaceHash)
      SF->dumpInterfaceHash(llvm::errs());
    else
      SF->dump();
    return false;
  }

//.........这里部分代码省略.........

/// parseTypeTupleBody
///   type-tuple:
///     '(' type-tuple-body? ')'
///   type-tuple-body:
///     type-tuple-element (',' type-tuple-element)* '...'?
///   type-tuple-element:
///     identifier ':' type
///     type
ParserResult<TupleTypeRepr> Parser::parseTypeTupleBody() {
  Parser::StructureMarkerRAII ParsingTypeTuple(*this, Tok);
  SourceLoc RPLoc, LPLoc = consumeToken(tok::l_paren);
  SourceLoc EllipsisLoc;
  unsigned EllipsisIdx;
  SmallVector<TypeRepr *, 8> ElementsR;

  // We keep track of the labels separately, and apply them at the end.
  SmallVector<std::tuple<Identifier, SourceLoc, Identifier, SourceLoc>, 4>
    Labels;

  ParserStatus Status = parseList(tok::r_paren, LPLoc, RPLoc,
                                  tok::comma, /*OptionalSep=*/false,
                                  /*AllowSepAfterLast=*/false,
                                  diag::expected_rparen_tuple_type_list,
                                  [&] () -> ParserStatus {
    // If this is a deprecated use of the inout marker in an argument list,
    // consume the inout.
    SourceLoc InOutLoc;
    bool hasAnyInOut = false;
    bool hasValidInOut = false;
    if (consumeIf(tok::kw_inout, InOutLoc)) {
      hasAnyInOut = true;
      hasValidInOut = false;
    }
    // If the tuple element starts with a potential argument label followed by a
    // ':' or another potential argument label, then the identifier is an
    // element tag, and it is followed by a type annotation.
    if (Tok.canBeArgumentLabel() &&
        (peekToken().is(tok::colon) || peekToken().canBeArgumentLabel())) {
      // Consume the name
      Identifier name;
      if (!Tok.is(tok::kw__))
        name = Context.getIdentifier(Tok.getText());
      SourceLoc nameLoc = consumeToken();

      // If there is a second name, consume it as well.
      Identifier secondName;
      SourceLoc secondNameLoc;
      if (Tok.canBeArgumentLabel()) {
        if (!Tok.is(tok::kw__))
          secondName = Context.getIdentifier(Tok.getText());
        secondNameLoc = consumeToken();
      }

      // Consume the ':'.
      if (!consumeIf(tok::colon))
        diagnose(Tok, diag::expected_parameter_colon);

      SourceLoc postColonLoc = Tok.getLoc();

      // Consume 'inout' if present.
      if (!hasAnyInOut && consumeIf(tok::kw_inout, InOutLoc)) {
        hasValidInOut = true;
      }

      SourceLoc extraneousInOutLoc;
      while (consumeIf(tok::kw_inout, extraneousInOutLoc)) {
        diagnose(Tok, diag::parameter_inout_var_let_repeated)
          .fixItRemove(extraneousInOutLoc);
      }

      // Parse the type annotation.
      ParserResult<TypeRepr> type = parseType(diag::expected_type);
      if (type.hasCodeCompletion())
        return makeParserCodeCompletionStatus();
      if (type.isNull())
        return makeParserError();

      if (!hasValidInOut && hasAnyInOut) {
        diagnose(Tok.getLoc(), diag::inout_as_attr_disallowed)
          .fixItRemove(InOutLoc)
          .fixItInsert(postColonLoc, "inout ");
      }

      // If an 'inout' marker was specified, build the type.  Note that we bury
      // the inout locator within the named locator.  This is weird but required
      // by sema apparently.
      if (InOutLoc.isValid())
        type = makeParserResult(new (Context) InOutTypeRepr(type.get(),
                                                            InOutLoc));

      // Record the label. We will look at these at the end.
      if (Labels.empty()) {
        Labels.assign(ElementsR.size(),
                      std::make_tuple(Identifier(), SourceLoc(),
                                      Identifier(), SourceLoc()));
      }
      Labels.push_back(std::make_tuple(name, nameLoc,
                                       secondName, secondNameLoc));

      ElementsR.push_back(type.get());
//.........这里部分代码省略.........

DeclContext *
ASTBuilder::findDeclContext(NodePointer node) {
  switch (node->getKind()) {
  case Demangle::Node::Kind::DeclContext:
  case Demangle::Node::Kind::Type:
  case Demangle::Node::Kind::BoundGenericClass:
  case Demangle::Node::Kind::BoundGenericEnum:
  case Demangle::Node::Kind::BoundGenericProtocol:
  case Demangle::Node::Kind::BoundGenericStructure:
  case Demangle::Node::Kind::BoundGenericTypeAlias:
    return findDeclContext(node->getFirstChild());

  case Demangle::Node::Kind::Module:
    return findModule(node);

  case Demangle::Node::Kind::Class:
  case Demangle::Node::Kind::Enum:
  case Demangle::Node::Kind::Protocol:
  case Demangle::Node::Kind::Structure:
  case Demangle::Node::Kind::TypeAlias: {
    const auto &declNameNode = node->getChild(1);

    // Handle local declarations.
    if (declNameNode->getKind() == Demangle::Node::Kind::LocalDeclName) {
      // Find the AST node for the defining module.
      auto moduleNode = findModuleNode(node);
      if (!moduleNode) return nullptr;

      auto module = findModule(moduleNode);
      if (!module) return nullptr;

      // Look up the local type by its mangling.
      auto mangledName = Demangle::mangleNode(node);
      auto decl = module->lookupLocalType(mangledName);
      if (!decl) return nullptr;

      return dyn_cast<DeclContext>(decl);
    }

    StringRef name;
    StringRef relatedEntityKind;
    Identifier privateDiscriminator;
    if (declNameNode->getKind() == Demangle::Node::Kind::Identifier) {
      name = declNameNode->getText();

    } else if (declNameNode->getKind() ==
                 Demangle::Node::Kind::PrivateDeclName) {
      name = declNameNode->getChild(1)->getText();
      privateDiscriminator =
        Ctx.getIdentifier(declNameNode->getChild(0)->getText());

    } else if (declNameNode->getKind() ==
                 Demangle::Node::Kind::RelatedEntityDeclName) {
      name = declNameNode->getChild(0)->getText();
      relatedEntityKind = declNameNode->getText();

    // Ignore any other decl-name productions for now.
    } else {
      return nullptr;
    }

    // Do some special logic for foreign type declarations.
    if (privateDiscriminator.empty()) {
      if (auto foreignModuleKind = getForeignModuleKind(node->getChild(0))) {
        return findForeignTypeDecl(name, relatedEntityKind,
                                    foreignModuleKind.getValue(),
                                    node->getKind());
      }
    }

    DeclContext *dc = findDeclContext(node->getChild(0));
    if (!dc) {
      return nullptr;
    }

    return findTypeDecl(dc, Ctx.getIdentifier(name),
                        privateDiscriminator, node->getKind());
  }

  case Demangle::Node::Kind::Global:
    return findDeclContext(node->getChild(0));

  case Demangle::Node::Kind::Extension: {
    auto *moduleDecl = dyn_cast_or_null<ModuleDecl>(
        findDeclContext(node->getChild(0)));
    if (!moduleDecl)
      return nullptr;

    auto *nominalDecl = dyn_cast_or_null<NominalTypeDecl>(
        findDeclContext(node->getChild(1)));
    if (!nominalDecl)
      return nullptr;

    CanGenericSignature genericSig;
    if (node->getNumChildren() > 2)
      genericSig = demangleGenericSignature(nominalDecl, node->getChild(2));

    for (auto *ext : nominalDecl->getExtensions()) {
      if (ext->getParentModule() != moduleDecl)
        continue;
//.........这里部分代码省略.........

/// Performs the compile requested by the user.
/// \param Instance Will be reset after performIRGeneration when the verifier
///                 mode is NoVerify and there were no errors.
/// \returns true on error
static bool performCompile(std::unique_ptr<CompilerInstance> &Instance,
                           CompilerInvocation &Invocation,
                           ArrayRef<const char *> Args,
                           int &ReturnValue,
                           FrontendObserver *observer) {
  FrontendOptions opts = Invocation.getFrontendOptions();
  FrontendOptions::ActionType Action = opts.RequestedAction;

  IRGenOptions &IRGenOpts = Invocation.getIRGenOptions();

  bool inputIsLLVMIr = Invocation.getInputKind() == InputFileKind::IFK_LLVM_IR;
  if (inputIsLLVMIr) {
    auto &LLVMContext = getGlobalLLVMContext();

    // Load in bitcode file.
    assert(Invocation.getInputFilenames().size() == 1 &&
           "We expect a single input for bitcode input!");
    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> FileBufOrErr =
      llvm::MemoryBuffer::getFileOrSTDIN(Invocation.getInputFilenames()[0]);
    if (!FileBufOrErr) {
      Instance->getASTContext().Diags.diagnose(SourceLoc(),
                                              diag::error_open_input_file,
                                              Invocation.getInputFilenames()[0],
                                              FileBufOrErr.getError().message());
      return true;
    }
    llvm::MemoryBuffer *MainFile = FileBufOrErr.get().get();

    llvm::SMDiagnostic Err;
    std::unique_ptr<llvm::Module> Module = llvm::parseIR(
                                             MainFile->getMemBufferRef(),
                                             Err, LLVMContext);
    if (!Module) {
      // TODO: Translate from the diagnostic info to the SourceManager location
      // if available.
      Instance->getASTContext().Diags.diagnose(SourceLoc(),
                                              diag::error_parse_input_file,
                                              Invocation.getInputFilenames()[0],
                                              Err.getMessage());
      return true;
    }

    // TODO: remove once the frontend understands what action it should perform
    IRGenOpts.OutputKind = getOutputKind(Action);

    return performLLVM(IRGenOpts, Instance->getASTContext(), Module.get());
  }

  ReferencedNameTracker nameTracker;
  bool shouldTrackReferences = !opts.ReferenceDependenciesFilePath.empty();
  if (shouldTrackReferences)
    Instance->setReferencedNameTracker(&nameTracker);

  if (Action == FrontendOptions::Parse ||
      Action == FrontendOptions::DumpParse ||
      Action == FrontendOptions::DumpInterfaceHash)
    Instance->performParseOnly();
  else
    Instance->performSema();

  if (Action == FrontendOptions::Parse)
    return Instance->getASTContext().hadError();

  if (observer) {
    observer->performedSemanticAnalysis(*Instance);
  }

  FrontendOptions::DebugCrashMode CrashMode = opts.CrashMode;
  if (CrashMode == FrontendOptions::DebugCrashMode::AssertAfterParse)
    debugFailWithAssertion();
  else if (CrashMode == FrontendOptions::DebugCrashMode::CrashAfterParse)
    debugFailWithCrash();

  ASTContext &Context = Instance->getASTContext();

  if (Action == FrontendOptions::REPL) {
    runREPL(*Instance, ProcessCmdLine(Args.begin(), Args.end()),
            Invocation.getParseStdlib());
    return Context.hadError();
  }

  SourceFile *PrimarySourceFile = Instance->getPrimarySourceFile();

  // We've been told to dump the AST (either after parsing or type-checking,
  // which is already differentiated in CompilerInstance::performSema()),
  // so dump or print the main source file and return.
  if (Action == FrontendOptions::DumpParse ||
      Action == FrontendOptions::DumpAST ||
      Action == FrontendOptions::PrintAST ||
      Action == FrontendOptions::DumpScopeMaps ||
      Action == FrontendOptions::DumpTypeRefinementContexts ||
      Action == FrontendOptions::DumpInterfaceHash) {
    SourceFile *SF = PrimarySourceFile;
    if (!SF) {
      SourceFileKind Kind = Invocation.getSourceFileKind();
      SF = &Instance->getMainModule()->getMainSourceFile(Kind);
//.........这里部分代码省略.........