Removing the penalty for breaking after "=".

Having seen more cases, this actually was not a good thing to do in the
first place. We can still improve on what we do now, but breaking after
the "=" is good in many cases.

Before:
aaaaaaaaaaaaa = aa->aaaaaaaaaaaaaaaaaaaa(
                    aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaa));

After:
aaaaaaaaaaaaa =
    aa->aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaa));

llvm-svn: 173257

2 files changed, 12 insertions, 18 deletions

diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 2d9bd2cc061..c75b8ef834b 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -702,11 +702,6 @@ private:
       return prec::Assignment;
     prec::Level Level = getPrecedence(Left);
 
-    // Breaking after an assignment leads to a bad result as the two sides of
-    // the assignment are visually very close together.
-    if (Level == prec::Assignment)
-      return 50;
-
     if (Level != prec::Unknown)
       return Level;
 
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 3a1cfb261bd..279b61c262b 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -1030,15 +1030,15 @@ TEST_F(FormatTest, BreaksAccordingToOperatorPrecedence) {
       "    ccccccccccccccccccccccccc) {\n}");
 }
 
-TEST_F(FormatTest, PrefersNotToBreakAfterAssignments) {
+TEST_F(FormatTest, BreaksAfterAssignments) {
   verifyFormat(
-      "unsigned Cost = TTI.getMemoryOpCost(I->getOpcode(), VectorTy,\n"
-      "                                    SI->getAlignment(),\n"
-      "                                    SI->getPointerAddressSpaceee());\n");
+      "unsigned Cost =\n"
+      "    TTI.getMemoryOpCost(I->getOpcode(), VectorTy, SI->getAlignment(),\n"
+      "                        SI->getPointerAddressSpaceee());\n");
   verifyFormat(
-      "CharSourceRange LineRange = CharSourceRange::getTokenRange(\n"
-      "                                Line.Tokens.front().Tok.getLocation(),\n"
-      "                                Line.Tokens.back().Tok.getLocation());");
+      "CharSourceRange LineRange =\n"
+      "    CharSourceRange::getTokenRange(Line.Tokens.front().Tok.getLoc(),\n"
+      "                                   Line.Tokens.back().Tok.getLoc());");
 }
 
 TEST_F(FormatTest, AlignsAfterAssignments) {
@@ -1055,9 +1055,9 @@ TEST_F(FormatTest, AlignsAfterAssignments) {
       "int Result = (aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
       "              aaaaaaaaaaaaaaaaaaaaaaaaa);");
   verifyFormat(
-      "double LooooooooooooooooooooooooongResult = aaaaaaaaaaaaaaaaaaaaaaaa +\n"
-      "                                            aaaaaaaaaaaaaaaaaaaaaaaa +\n"
-      "                                            aaaaaaaaaaaaaaaaaaaaaaaa;");
+      "double LooooooooooooooooooooooooongResult =\n"
+      "    aaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaa +\n"
+      "    aaaaaaaaaaaaaaaaaaaaaaaa;");
 }
 
 TEST_F(FormatTest, AlignsAfterReturn) {
@@ -1133,9 +1133,8 @@ TEST_F(FormatTest, UnderstandsEquals) {
       "}");
 
   verifyFormat(
-      // FIXME: Does an expression like this ever make sense? If yes, fix.
-      "if (int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = 100000000 +\n"
-      "    10000000) {\n}");
+      "if (int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
+      "        100000000 + 10000000) {\n}");
 }
 
 TEST_F(FormatTest, WrapsAtFunctionCallsIfNecessary) {