[PATCH] D60996: [clang-format] Fix bug in reflow of block comments containing CR/LF

[Owen Pan via Phabricator via cfe-commits]

owenpan created this revision.
owenpan added reviewers: klimek, krasimir, sammccall, MyDeveloperDay, djasper.
owenpan added a project: clang.
Herald added a subscriber: cfe-commits.

This patch fixes PR 36119 <https://bugs.llvm.org/show_bug.cgi?id=36119>.


Repository:
  rC Clang

https://reviews.llvm.org/D60996

Files:
  clang/lib/Format/BreakableToken.cpp
  clang/lib/Format/BreakableToken.h
  clang/lib/Format/ContinuationIndenter.cpp
  clang/lib/Format/WhitespaceManager.h
  clang/unittests/Format/FormatTest.cpp


Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -12857,6 +12857,18 @@
                    "should not introduce\r\n"
                    "an extra carriage return\r\n"
                    "*/\r\n"));
+  EXPECT_EQ("/*\r\n"
+            "\r\n"
+            "*/",
+            format("/*\r\n"
+                   " \r\n"
+                   "*/"));
+  EXPECT_EQ("/*\r\n"
+            "    \r\r\r\n"
+            "*/",
+            format("/*\r\n"
+                   "    \r\r\r\n"
+                   "*/"));
 }
 
 TEST_F(FormatTest, MunchSemicolonAfterBlocks) {
Index: clang/lib/Format/WhitespaceManager.h
===================================================================
--- clang/lib/Format/WhitespaceManager.h
+++ clang/lib/Format/WhitespaceManager.h
@@ -40,6 +40,8 @@
                     bool UseCRLF)
       : SourceMgr(SourceMgr), Style(Style), UseCRLF(UseCRLF) {}
 
+  bool useCRLF() const { return UseCRLF; }
+
   /// Replaces the whitespace in front of \p Tok. Only call once for
   /// each \c AnnotatedToken.
   ///
Index: clang/lib/Format/ContinuationIndenter.cpp
===================================================================
--- clang/lib/Format/ContinuationIndenter.cpp
+++ clang/lib/Format/ContinuationIndenter.cpp
@@ -1810,7 +1810,7 @@
     }
     return llvm::make_unique<BreakableBlockComment>(
         Current, StartColumn, Current.OriginalColumn, !Current.Previous,
-        State.Line->InPPDirective, Encoding, Style);
+        State.Line->InPPDirective, Encoding, Style, Whitespaces.useCRLF());
   } else if (Current.is(TT_LineComment) &&
              (Current.Previous == nullptr ||
               Current.Previous->isNot(TT_ImplicitStringLiteral))) {
Index: clang/lib/Format/BreakableToken.h
===================================================================
--- clang/lib/Format/BreakableToken.h
+++ clang/lib/Format/BreakableToken.h
@@ -359,7 +359,7 @@
   BreakableBlockComment(const FormatToken &Token, unsigned StartColumn,
                         unsigned OriginalStartColumn, bool FirstInLine,
                         bool InPPDirective, encoding::Encoding Encoding,
-                        const FormatStyle &Style);
+                        const FormatStyle &Style, bool UseCRLF);
 
   unsigned getRangeLength(unsigned LineIndex, unsigned Offset,
                           StringRef::size_type Length,
Index: clang/lib/Format/BreakableToken.cpp
===================================================================
--- clang/lib/Format/BreakableToken.cpp
+++ clang/lib/Format/BreakableToken.cpp
@@ -329,7 +329,7 @@
 BreakableBlockComment::BreakableBlockComment(
     const FormatToken &Token, unsigned StartColumn,
     unsigned OriginalStartColumn, bool FirstInLine, bool InPPDirective,
-    encoding::Encoding Encoding, const FormatStyle &Style)
+    encoding::Encoding Encoding, const FormatStyle &Style, bool UseCRLF)
     : BreakableComment(Token, StartColumn, InPPDirective, Encoding, Style),
       DelimitersOnNewline(false),
       UnbreakableTailLength(Token.UnbreakableTailLength) {
@@ -338,7 +338,8 @@
 
   StringRef TokenText(Tok.TokenText);
   assert(TokenText.startswith("/*") && TokenText.endswith("*/"));
-  TokenText.substr(2, TokenText.size() - 4).split(Lines, "\n");
+  TokenText.substr(2, TokenText.size() - 4).split(Lines,
+                                                  UseCRLF ? "\r\n" : "\n");
 
   int IndentDelta = StartColumn - OriginalStartColumn;
   Content.resize(Lines.size());


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