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diff --git a/include/clang/Format/Format.h b/include/clang/Format/Format.h
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+//===--- Format.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
+/// Various functions to configurably format source code.
+///
+/// This is EXPERIMENTAL code under heavy development. It is not in a state yet,
+/// where it can be used to format real code.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FORMAT_FORMAT_H_
+#define LLVM_CLANG_FORMAT_FORMAT_H
+
+#include "clang/Frontend/FrontendAction.h"
+#include "clang/Tooling/Refactoring.h"
+
+namespace clang {
+
+class Lexer;
+class SourceManager;
+
+namespace format {
+
+/// \brief The \c FormatStyle is used to configure the formatting to follow
+/// specific guidelines.
+struct FormatStyle {
+  /// \brief The column limit.
+  unsigned ColumnLimit;
+
+  /// \brief The maximum number of consecutive empty lines to keep.
+  unsigned MaxEmptyLinesToKeep;
+
+  /// \brief Set whether & and * bind to the type as opposed to the variable.
+  bool PointerAndReferenceBindToType;
+
+  /// \brief The extra indent or outdent of access modifiers (e.g.: public:).
+  int AccessModifierOffset;
+
+  /// \brief Split two consecutive closing '>' by a space, i.e. use
+  /// A<A<int> > instead of A<A<int>>.
+  bool SplitTemplateClosingGreater;
+};
+
+/// \brief Returns a format style complying with the LLVM coding standards:
+/// http://llvm.org/docs/CodingStandards.html.
+FormatStyle getLLVMStyle();
+
+/// \brief Returns a format style complying with Google's C++ style guide:
+/// http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml.
+FormatStyle getGoogleStyle();
+
+/// \brief Reformats the given \p Ranges in the token stream coming out of
+/// \c Lex.
+///
+/// Each range is extended on either end to its next bigger logic unit, i.e.
+/// everything that might influence its formatting or might be influenced by its
+/// formatting.
+///
+/// Returns the \c Replacements necessary to make all \p Ranges comply with
+/// \p Style.
+tooling::Replacements reformat(const FormatStyle &Style, Lexer &Lex,
+                               SourceManager &SourceMgr,
+                               std::vector<CharSourceRange> Ranges);
+
+}  // end namespace format
+}  // end namespace clang
+
+#endif // LLVM_CLANG_FORMAT_FORMAT_H