[clang-format] Convert AlignEscapedNewlinesLeft to an enum, adding

DontAlign

This converts the clang-format option AlignEscapedNewlinesLeft from a
boolean to an enum, named AlignEscapedNewlines, with options Left (prev.
true), Right (prev. false), and a new option DontAlign.

When set to DontAlign, the backslashes are placed just after the last token in each line:
  #define EXAMPLE \
    do { \
        int x = aaaaa; \
        int b; \
        int dddddddddd; \
    } while (0)

Patch by jtbandes. Thank you!

llvm-svn: 302428

1 files changed, 16 insertions, 3 deletions

diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index f55a623a8d1..e961e5536ef 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -171,6 +171,18 @@ template <> struct ScalarEnumerationTraits<FormatStyle::BracketAlignmentStyle> {
   }
 };
 
+template <> struct ScalarEnumerationTraits<FormatStyle::EscapedNewlineAlignmentStyle> {
+  static void enumeration(IO &IO, FormatStyle::EscapedNewlineAlignmentStyle &Value) {
+    IO.enumCase(Value, "DontAlign", FormatStyle::ENAS_DontAlign);
+    IO.enumCase(Value, "Left", FormatStyle::ENAS_Left);
+    IO.enumCase(Value, "Right", FormatStyle::ENAS_Right);
+
+    // For backward compatibility.
+    IO.enumCase(Value, "true", FormatStyle::ENAS_Left);
+    IO.enumCase(Value, "false", FormatStyle::ENAS_Right);
+  }
+};
+
 template <> struct ScalarEnumerationTraits<FormatStyle::PointerAlignmentStyle> {
   static void enumeration(IO &IO, FormatStyle::PointerAlignmentStyle &Value) {
     IO.enumCase(Value, "Middle", FormatStyle::PAS_Middle);
@@ -233,6 +245,7 @@ template <> struct MappingTraits<FormatStyle> {
 
     // For backward compatibility.
     if (!IO.outputting()) {
+      IO.mapOptional("AlignEscapedNewlinesLeft", Style.AlignEscapedNewlines);
       IO.mapOptional("DerivePointerBinding", Style.DerivePointerAlignment);
       IO.mapOptional("IndentFunctionDeclarationAfterType",
                      Style.IndentWrappedFunctionNames);
@@ -247,7 +260,7 @@ template <> struct MappingTraits<FormatStyle> {
                    Style.AlignConsecutiveAssignments);
     IO.mapOptional("AlignConsecutiveDeclarations",
                    Style.AlignConsecutiveDeclarations);
-    IO.mapOptional("AlignEscapedNewlinesLeft", Style.AlignEscapedNewlinesLeft);
+    IO.mapOptional("AlignEscapedNewlines", Style.AlignEscapedNewlines);
     IO.mapOptional("AlignOperands", Style.AlignOperands);
     IO.mapOptional("AlignTrailingComments", Style.AlignTrailingComments);
     IO.mapOptional("AllowAllParametersOfDeclarationOnNextLine",
@@ -498,7 +511,7 @@ FormatStyle getLLVMStyle() {
   FormatStyle LLVMStyle;
   LLVMStyle.Language = FormatStyle::LK_Cpp;
   LLVMStyle.AccessModifierOffset = -2;
-  LLVMStyle.AlignEscapedNewlinesLeft = false;
+  LLVMStyle.AlignEscapedNewlines = FormatStyle::ENAS_Right;
   LLVMStyle.AlignAfterOpenBracket = FormatStyle::BAS_Align;
   LLVMStyle.AlignOperands = true;
   LLVMStyle.AlignTrailingComments = true;
@@ -587,7 +600,7 @@ FormatStyle getGoogleStyle(FormatStyle::LanguageKind Language) {
   GoogleStyle.Language = Language;
 
   GoogleStyle.AccessModifierOffset = -1;
-  GoogleStyle.AlignEscapedNewlinesLeft = true;
+  GoogleStyle.AlignEscapedNewlines = FormatStyle::ENAS_Left;
   GoogleStyle.AllowShortIfStatementsOnASingleLine = true;
   GoogleStyle.AllowShortLoopsOnASingleLine = true;
   GoogleStyle.AlwaysBreakBeforeMultilineStrings = true;