clang-format: Increase penalty for breaking comments.

Unexpectedly, it seems that people commonly know what they were doing
when writing a comment.

Also, being more conservative about comment breaking has the advantage
of giving more flexibility. If a linebreak within the comment can
improve formatting, the author can add it (after which clang-format
won't undo it). There is no way to override clang-format's behavior if
it breaks a comment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197698 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Format/Format.cpp b/lib/Format/Format.cpp
index 080769d159a2d3f7c408ba6474b142656886e285..cff6fc5f6d9fe0b1cfa609f07a8b335327ef6ba7 100644 (file)
--- a/lib/Format/Format.cpp
+++ b/lib/Format/Format.cpp
@@ -276,7 +276,7 @@ FormatStyle getLLVMStyle() {
   LLVMStyle.ContinuationIndentWidth = 4;
   LLVMStyle.SpacesInAngles = false;
 
-  LLVMStyle.PenaltyBreakComment = 60;
+  LLVMStyle.PenaltyBreakComment = 300;
   LLVMStyle.PenaltyBreakFirstLessLess = 120;
   LLVMStyle.PenaltyBreakString = 1000;
   LLVMStyle.PenaltyExcessCharacter = 1000000;

diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index db105ee3233ca5f8fb0bb596a68cb6c754aa0c1f..a56333d778385f62ad78e23be03b092edbd6275d 100644 (file)
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -996,14 +996,14 @@ TEST_F(FormatTest, SplitsLongCxxComments) {
             format("// A comment before a macro definition\n"
                    "#define a b",
                    getLLVMStyleWithColumns(20)));
-  EXPECT_EQ("void ffffff(int aaaaaaaaa,  // wwww\n"
-            "            int a, int bbb, // xxxxxxx\n"
-            "                            // yyyyyyyyy\n"
-            "            int c, int d, int e) {}",
+  EXPECT_EQ("void\n"
+            "ffffff(int aaaaaaaaa,  // wwww\n"
+            "       int bbbbbbbbbb, // xxxxxxx\n"
+            "                       // yyyyyyyyyy\n"
+            "       int c, int d, int e) {}",
             format("void ffffff(\n"
                    "    int aaaaaaaaa, // wwww\n"
-                   "    int a,\n"
-                   "    int bbb, // xxxxxxx yyyyyyyyy\n"
+                   "    int bbbbbbbbbb, // xxxxxxx yyyyyyyyyy\n"
                    "    int c, int d, int e) {}",
                    getLLVMStyleWithColumns(40)));
   EXPECT_EQ("//\t aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
@@ -1067,9 +1067,9 @@ TEST_F(FormatTest, PriorityOfCommentBreaking) {
             format("if (xxxxxxxxxx && yyy || // aaaaaa bbbbbbbb cccc\n"
                    "    zzz) q();",
                    getLLVMStyleWithColumns(40)));
-  EXPECT_EQ("fffffffff(&xxx, // aaaaaaaaaaaa\n"
-            "                // bbbbbbbbbbb\n"
-            "          zzz);",
+  EXPECT_EQ("fffffffff(\n"
+            "    &xxx, // aaaaaaaaaaaa bbbbbbbbbbb\n"
+            "    zzz);",
             format("fffffffff(&xxx, // aaaaaaaaaaaa bbbbbbbbbbb\n"
                    " zzz);",
                    getLLVMStyleWithColumns(40)));