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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.
+///
+//===----------------------------------------------------------------------===//
+
+#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;
+class DiagnosticConsumer;
+
+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 penalty for each character outside of the column limit.
+  unsigned PenaltyExcessCharacter;
+
+  /// \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 PointerBindsToType;
+
+  /// \brief If \c true, analyze the formatted file for the most common binding.
+  bool DerivePointerBinding;
+
+  /// \brief The extra indent or outdent of access modifiers (e.g.: public:).
+  int AccessModifierOffset;
+
+  enum LanguageStandard {
+    LS_Cpp03,
+    LS_Cpp11,
+    LS_Auto
+  };
+
+  /// \brief Format compatible with this standard, e.g. use \c A<A<int> >
+  /// instead of \c A<A<int>> for LS_Cpp03.
+  LanguageStandard Standard;
+
+  /// \brief If \c true, analyze the formatted file for C++03 compatibility.
+  bool DeriveBackwardsCompatibility;
+
+  /// \brief Indent case labels one level from the switch statement.
+  ///
+  /// When false, use the same indentation level as for the switch statement.
+  /// Switch statement body is always indented one level more than case labels.
+  bool IndentCaseLabels;
+
+  /// \brief The number of spaces to before trailing line comments.
+  unsigned SpacesBeforeTrailingComments;
+
+  /// \brief If false, a function call's or function definition's parameters
+  /// will either all be on the same line or will have one line each.
+  bool BinPackParameters;
+
+  /// \brief Allow putting all parameters of a function declaration onto
+  /// the next line even if \c BinPackParameters is \c false.
+  bool AllowAllParametersOfDeclarationOnNextLine;
+
+  /// \brief Penalty for putting the return type of a function onto its own
+  /// line.
+  unsigned PenaltyReturnTypeOnItsOwnLine;
+
+  /// \brief If the constructor initializers don't fit on a line, put each
+  /// initializer on its own line.
+  bool ConstructorInitializerAllOnOneLineOrOnePerLine;
+
+  /// \brief If true, "if (a) return;" can be put on a single line.
+  bool AllowShortIfStatementsOnASingleLine;
+
+  /// \brief Add a space in front of an Objective-C protocol list, i.e. use
+  /// Foo <Protocol> instead of Foo<Protocol>.
+  bool ObjCSpaceBeforeProtocolList;
+};
+
+/// \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 Returns a format style complying with Chromium's style guide:
+/// http://www.chromium.org/developers/coding-style.
+FormatStyle getChromiumStyle();
+
+/// \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.
+///
+/// \param DiagClient A custom DiagnosticConsumer. Can be 0, in this case
+/// diagnostic is output to llvm::errs().
+///
+/// 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,
+                               DiagnosticConsumer *DiagClient = 0);
+
+/// \brief Returns the \c LangOpts that the formatter expects you to set.
+LangOptions getFormattingLangOpts();
+
+} // end namespace format
+} // end namespace clang
+
+#endif // LLVM_CLANG_FORMAT_FORMAT_H