clang-format: Make it very slighly more expensive to wrap between "= {".

This prevents unwanted fallout from r296664. Specifically in proto formatting,
this changed:
  optional Aaaaaaaa aaaaaaaa = 12 [
    (aaa) = aaaa,
    (bbbbbbbbbbbbbbbbbbbbbbbbbb) = {
      aaaaaaaaaaaaaaaaa: true,
      aaaaaaaaaaaaaaaa: true
    }
  ];

Into:
  optional Aaaaaaaa aaaaaaaa = 12 [
    (aaa) = aaaa,
    (bbbbbbbbbbbbbbbbbbbbbbbbbb) =
        {aaaaaaaaaaaaaaaaa: true, aaaaaaaaaaaaaaaa: true}
  ];

Which is considered less readable. Generally, it seems preferable to
format such dict literals as blocks rather than contract them to one
line.

llvm-svn: 297696

2 files changed, 8 insertions, 1 deletions

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index ed9788d7476..228425bc473 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -1976,7 +1976,7 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
   if (Right.is(TT_LambdaArrow))
     return 110;
   if (Left.is(tok::equal) && Right.is(tok::l_brace))
-    return 150;
+    return 160;
   if (Left.is(TT_CastRParen))
     return 100;
   if (Left.is(tok::coloncolon) ||
diff --git a/clang/unittests/Format/FormatTestProto.cpp b/clang/unittests/Format/FormatTestProto.cpp
index 41d210ac7cd..d174c65a1f3 100644
--- a/clang/unittests/Format/FormatTestProto.cpp
+++ b/clang/unittests/Format/FormatTestProto.cpp
@@ -138,6 +138,13 @@ TEST_F(FormatTestProto, MessageFieldAttributes) {
   verifyFormat("optional string test = 1 [default =\n"
                "                              \"test\"\n"
                "                              \"test\"];");
+  verifyFormat("optional Aaaaaaaa aaaaaaaa = 12 [\n"
+               "  (aaa) = aaaa,\n"
+               "  (bbbbbbbbbbbbbbbbbbbbbbbbbb) = {\n"
+               "    aaaaaaaaaaaaaaaaa: true,\n"
+               "    aaaaaaaaaaaaaaaa: true\n"
+               "  }\n"
+               "];");
 }
 
 TEST_F(FormatTestProto, DoesntWrapFileOptions) {