[PATCH] Added Mozilla style, cleaned get*Style methods.

[Alexander Kornienko]

Hi djasper,

Patch based on a patch by Ehsan Akhgari.

http://llvm-reviews.chandlerc.com/D750

Files:
  include/clang/Format/Format.h
  lib/Format/Format.cpp
  tools/clang-format/ClangFormat.cpp

Index: include/clang/Format/Format.h
===================================================================
--- include/clang/Format/Format.h
+++ include/clang/Format/Format.h
@@ -57,9 +57,6 @@
   /// 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.
@@ -109,6 +106,10 @@
 /// http://www.chromium.org/developers/coding-style.
 FormatStyle getChromiumStyle();
 
+/// \brief Returns a format style complying with Mozilla's style guide:
+/// https://developer.mozilla.org/en-US/docs/Developer_Guide/Coding_Style.
+FormatStyle getMozillaStyle();
+
 /// \brief Reformats the given \p Ranges in the token stream coming out of
 /// \c Lex.
 ///
Index: lib/Format/Format.cpp
===================================================================
--- lib/Format/Format.cpp
+++ lib/Format/Format.cpp
@@ -36,43 +36,43 @@
 
 FormatStyle getLLVMStyle() {
   FormatStyle LLVMStyle;
-  LLVMStyle.ColumnLimit = 80;
-  LLVMStyle.MaxEmptyLinesToKeep = 1;
-  LLVMStyle.PointerBindsToType = false;
-  LLVMStyle.DerivePointerBinding = false;
   LLVMStyle.AccessModifierOffset = -2;
-  LLVMStyle.Standard = FormatStyle::LS_Cpp03;
-  LLVMStyle.IndentCaseLabels = false;
-  LLVMStyle.SpacesBeforeTrailingComments = 1;
-  LLVMStyle.BinPackParameters = true;
+  LLVMStyle.AlignEscapedNewlinesLeft = false;
   LLVMStyle.AllowAllParametersOfDeclarationOnNextLine = true;
-  LLVMStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = false;
   LLVMStyle.AllowShortIfStatementsOnASingleLine = false;
+  LLVMStyle.BinPackParameters = true;
+  LLVMStyle.ColumnLimit = 80;
+  LLVMStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = false;
+  LLVMStyle.DerivePointerBinding = false;
+  LLVMStyle.IndentCaseLabels = false;
+  LLVMStyle.MaxEmptyLinesToKeep = 1;
   LLVMStyle.ObjCSpaceBeforeProtocolList = true;
   LLVMStyle.PenaltyExcessCharacter = 1000000;
   LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 75;
-  LLVMStyle.AlignEscapedNewlinesLeft = false;
+  LLVMStyle.PointerBindsToType = false;
+  LLVMStyle.SpacesBeforeTrailingComments = 1;
+  LLVMStyle.Standard = FormatStyle::LS_Cpp03;
   return LLVMStyle;
 }
 
 FormatStyle getGoogleStyle() {
   FormatStyle GoogleStyle;
-  GoogleStyle.ColumnLimit = 80;
-  GoogleStyle.MaxEmptyLinesToKeep = 1;
-  GoogleStyle.PointerBindsToType = true;
-  GoogleStyle.DerivePointerBinding = true;
   GoogleStyle.AccessModifierOffset = -1;
-  GoogleStyle.Standard = FormatStyle::LS_Auto;
-  GoogleStyle.IndentCaseLabels = true;
-  GoogleStyle.SpacesBeforeTrailingComments = 2;
-  GoogleStyle.BinPackParameters = true;
+  GoogleStyle.AlignEscapedNewlinesLeft = true;
   GoogleStyle.AllowAllParametersOfDeclarationOnNextLine = true;
-  GoogleStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
   GoogleStyle.AllowShortIfStatementsOnASingleLine = true;
+  GoogleStyle.BinPackParameters = true;
+  GoogleStyle.ColumnLimit = 80;
+  GoogleStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
+  GoogleStyle.DerivePointerBinding = true;
+  GoogleStyle.IndentCaseLabels = true;
+  GoogleStyle.MaxEmptyLinesToKeep = 1;
   GoogleStyle.ObjCSpaceBeforeProtocolList = false;
   GoogleStyle.PenaltyExcessCharacter = 1000000;
   GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
-  GoogleStyle.AlignEscapedNewlinesLeft = true;
+  GoogleStyle.PointerBindsToType = true;
+  GoogleStyle.SpacesBeforeTrailingComments = 2;
+  GoogleStyle.Standard = FormatStyle::LS_Auto;
   return GoogleStyle;
 }
 
@@ -86,6 +86,18 @@
   return ChromiumStyle;
 }
 
+FormatStyle getMozillaStyle() {
+  FormatStyle MozillaStyle = getLLVMStyle();
+  MozillaStyle.AllowAllParametersOfDeclarationOnNextLine = false;
+  MozillaStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
+  MozillaStyle.DerivePointerBinding = true;
+  MozillaStyle.IndentCaseLabels = true;
+  MozillaStyle.ObjCSpaceBeforeProtocolList = false;
+  MozillaStyle.PenaltyReturnTypeOnItsOwnLine = 200;
+  MozillaStyle.PointerBindsToType = true;
+  return MozillaStyle;
+}
+
 // Returns the length of everything up to the first possible line break after
 // the ), ], } or > matching \c Tok.
 static unsigned getLengthToMatchingParen(const AnnotatedToken &Tok) {
Index: tools/clang-format/ClangFormat.cpp
===================================================================
--- tools/clang-format/ClangFormat.cpp
+++ tools/clang-format/ClangFormat.cpp
@@ -36,7 +36,7 @@
                            "Can only be used with one input file."));
 static cl::opt<std::string> Style(
     "style",
-    cl::desc("Coding style, currently supports: LLVM, Google, Chromium."),
+    cl::desc("Coding style, currently supports: LLVM, Google, Chromium, Mozilla."),
     cl::init("LLVM"));
 static cl::opt<bool> Inplace("i",
                              cl::desc("Inplace edit <file>s, if specified."));
@@ -63,8 +63,13 @@
   FormatStyle TheStyle = getGoogleStyle();
   if (Style == "LLVM")
     TheStyle = getLLVMStyle();
-  if (Style == "Chromium")
+  else if (Style == "Chromium")
     TheStyle = getChromiumStyle();
+  else if (Style == "Mozilla")
+    TheStyle = getMozillaStyle();
+  else
+    llvm::errs() << "Unknown style: " << Style << ", using Google\n";
+
   return TheStyle;
 }
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