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diff --git a/gnu/llvm/tools/clang/lib/Format/TokenAnnotator.h b/gnu/llvm/tools/clang/lib/Format/TokenAnnotator.h
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+//===--- TokenAnnotator.h - Format C++ code ---------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file implements a token annotator, i.e. creates
+/// \c AnnotatedTokens out of \c FormatTokens with required extra information.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_FORMAT_TOKENANNOTATOR_H
+#define LLVM_CLANG_LIB_FORMAT_TOKENANNOTATOR_H
+
+#include "UnwrappedLineParser.h"
+#include "clang/Format/Format.h"
+#include <string>
+
+namespace clang {
+class SourceManager;
+
+namespace format {
+
+enum LineType {
+  LT_Invalid,
+  LT_ImportStatement,
+  LT_ObjCDecl, // An @interface, @implementation, or @protocol line.
+  LT_ObjCMethodDecl,
+  LT_ObjCProperty, // An @property line.
+  LT_Other,
+  LT_PreprocessorDirective,
+  LT_VirtualFunctionDecl
+};
+
+class AnnotatedLine {
+public:
+  AnnotatedLine(const UnwrappedLine &Line)
+      : First(Line.Tokens.front().Tok), Level(Line.Level),
+        InPPDirective(Line.InPPDirective),
+        MustBeDeclaration(Line.MustBeDeclaration), MightBeFunctionDecl(false),
+        IsMultiVariableDeclStmt(false), Affected(false),
+        LeadingEmptyLinesAffected(false), ChildrenAffected(false) {
+    assert(!Line.Tokens.empty());
+
+    // Calculate Next and Previous for all tokens. Note that we must overwrite
+    // Next and Previous for every token, as previous formatting runs might have
+    // left them in a different state.
+    First->Previous = nullptr;
+    FormatToken *Current = First;
+    for (std::list<UnwrappedLineNode>::const_iterator I = ++Line.Tokens.begin(),
+                                                      E = Line.Tokens.end();
+         I != E; ++I) {
+      const UnwrappedLineNode &Node = *I;
+      Current->Next = I->Tok;
+      I->Tok->Previous = Current;
+      Current = Current->Next;
+      Current->Children.clear();
+      for (const auto &Child : Node.Children) {
+        Children.push_back(new AnnotatedLine(Child));
+        Current->Children.push_back(Children.back());
+      }
+    }
+    Last = Current;
+    Last->Next = nullptr;
+  }
+
+  ~AnnotatedLine() {
+    for (unsigned i = 0, e = Children.size(); i != e; ++i) {
+      delete Children[i];
+    }
+    FormatToken *Current = First;
+    while (Current) {
+      Current->Children.clear();
+      Current->Role.reset();
+      Current = Current->Next;
+    }
+  }
+
+  /// \c true if this line starts with the given tokens in order, ignoring
+  /// comments.
+  template <typename... Ts> bool startsWith(Ts... Tokens) const {
+    return startsWith(First, Tokens...);
+  }
+
+  /// \c true if this line looks like a function definition instead of a
+  /// function declaration. Asserts MightBeFunctionDecl.
+  bool mightBeFunctionDefinition() const {
+    assert(MightBeFunctionDecl);
+    // FIXME: Line.Last points to other characters than tok::semi
+    // and tok::lbrace.
+    return !Last->isOneOf(tok::semi, tok::comment);
+  }
+
+  FormatToken *First;
+  FormatToken *Last;
+
+  SmallVector<AnnotatedLine *, 0> Children;
+
+  LineType Type;
+  unsigned Level;
+  bool InPPDirective;
+  bool MustBeDeclaration;
+  bool MightBeFunctionDecl;
+  bool IsMultiVariableDeclStmt;
+
+  /// \c True if this line should be formatted, i.e. intersects directly or
+  /// indirectly with one of the input ranges.
+  bool Affected;
+
+  /// \c True if the leading empty lines of this line intersect with one of the
+  /// input ranges.
+  bool LeadingEmptyLinesAffected;
+
+  /// \c True if a one of this line's children intersects with an input range.
+  bool ChildrenAffected;
+
+private:
+  // Disallow copying.
+  AnnotatedLine(const AnnotatedLine &) = delete;
+  void operator=(const AnnotatedLine &) = delete;
+
+  template <typename A, typename... Ts>
+  bool startsWith(FormatToken *Tok, A K1) const {
+    while (Tok && Tok->is(tok::comment))
+      Tok = Tok->Next;
+    return Tok && Tok->is(K1);
+  }
+
+  template <typename A, typename... Ts>
+  bool startsWith(FormatToken *Tok, A K1, Ts... Tokens) const {
+    return startsWith(Tok, K1) && startsWith(Tok->Next, Tokens...);
+  }
+};
+
+/// \brief Determines extra information about the tokens comprising an
+/// \c UnwrappedLine.
+class TokenAnnotator {
+public:
+  TokenAnnotator(const FormatStyle &Style, const AdditionalKeywords &Keywords)
+      : Style(Style), Keywords(Keywords) {}
+
+  /// \brief Adapts the indent levels of comment lines to the indent of the
+  /// subsequent line.
+  // FIXME: Can/should this be done in the UnwrappedLineParser?
+  void setCommentLineLevels(SmallVectorImpl<AnnotatedLine *> &Lines);
+
+  void annotate(AnnotatedLine &Line);
+  void calculateFormattingInformation(AnnotatedLine &Line);
+
+private:
+  /// \brief Calculate the penalty for splitting before \c Tok.
+  unsigned splitPenalty(const AnnotatedLine &Line, const FormatToken &Tok,
+                        bool InFunctionDecl);
+
+  bool spaceRequiredBetween(const AnnotatedLine &Line, const FormatToken &Left,
+                            const FormatToken &Right);
+
+  bool spaceRequiredBefore(const AnnotatedLine &Line, const FormatToken &Tok);
+
+  bool mustBreakBefore(const AnnotatedLine &Line, const FormatToken &Right);
+
+  bool canBreakBefore(const AnnotatedLine &Line, const FormatToken &Right);
+
+  bool mustBreakForReturnType(const AnnotatedLine &Line) const;
+
+  void printDebugInfo(const AnnotatedLine &Line);
+
+  void calculateUnbreakableTailLengths(AnnotatedLine &Line);
+
+  const FormatStyle &Style;
+
+  const AdditionalKeywords &Keywords;
+};
+
+} // end namespace format
+} // end namespace clang
+
+#endif