release/18.x: [clang-format] Revert breaking stream operators to prev…

[owenca]

…ious default (#89016)

Backport 29ecd6d

[llvmbot]

@llvm/pr-subscribers-clang-format

Author: Owen Pan (owenca)

Changes

…ious default (#89016)

Backport 29ecd6d

---

Full diff: https://github.com/llvm/llvm-project/pull/89492.diff

5 Files Affected:

• (modified) clang/lib/Format/TokenAnnotator.cpp (+2-6)
• (modified) clang/unittests/Format/FormatTest.cpp (+1-6)
• (modified) clang/unittests/Format/TokenAnnotatorTest.cpp (-9)
• (modified) polly/lib/Analysis/DependenceInfo.cpp (+2-2)
• (modified) polly/lib/Analysis/ScopBuilder.cpp (+4-3)

diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 4d482e6543d6f5..9c4a8381f99824 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -5157,12 +5157,8 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine &Line,
     return true;
   if (Left.IsUnterminatedLiteral)
     return true;
-  // FIXME: Breaking after newlines seems useful in general. Turn this into an
-  // option and recognize more cases like endl etc, and break independent of
-  // what comes after operator lessless.
-  if (Right.is(tok::lessless) && Right.Next &&
-      Right.Next->is(tok::string_literal) && Left.is(tok::string_literal) &&
-      Left.TokenText.ends_with("\\n\"")) {
+  if (Right.is(tok::lessless) && Right.Next && Left.is(tok::string_literal) &&
+      Right.Next->is(tok::string_literal)) {
     return true;
   }
   if (Right.is(TT_RequiresClause)) {
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 0beba12dda62ae..816e58bd976db1 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -27019,12 +27019,6 @@ TEST_F(FormatTest, PPBranchesInBracedInit) {
                "};");
 }
 
-TEST_F(FormatTest, StreamOutputOperator) {
-  verifyFormat("std::cout << \"foo\" << \"bar\" << baz;");
-  verifyFormat("std::cout << \"foo\\n\"\n"
-               "          << \"bar\";");
-}
-
 TEST_F(FormatTest, BreakAdjacentStringLiterals) {
   constexpr StringRef Code{
       "return \"Code\" \"\\0\\52\\26\\55\\55\\0\" \"x013\" \"\\02\\xBA\";"};
@@ -27039,6 +27033,7 @@ TEST_F(FormatTest, BreakAdjacentStringLiterals) {
   Style.BreakAdjacentStringLiterals = false;
   verifyFormat(Code, Style);
 }
+
 } // namespace
 } // namespace test
 } // namespace format
diff --git a/clang/unittests/Format/TokenAnnotatorTest.cpp b/clang/unittests/Format/TokenAnnotatorTest.cpp
index c72c9384ff91d6..dea94a5c6b8356 100644
--- a/clang/unittests/Format/TokenAnnotatorTest.cpp
+++ b/clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -2611,15 +2611,6 @@ TEST_F(TokenAnnotatorTest, BraceKind) {
   EXPECT_BRACE_KIND(Tokens[14], BK_Block);
 }
 
-TEST_F(TokenAnnotatorTest, StreamOperator) {
-  auto Tokens = annotate("\"foo\\n\" << aux << \"foo\\n\" << \"foo\";");
-  ASSERT_EQ(Tokens.size(), 9u) << Tokens;
-  EXPECT_FALSE(Tokens[1]->MustBreakBefore);
-  EXPECT_FALSE(Tokens[3]->MustBreakBefore);
-  // Only break between string literals if the former ends with \n.
-  EXPECT_TRUE(Tokens[5]->MustBreakBefore);
-}
-
 } // namespace
 } // namespace format
 } // namespace clang
diff --git a/polly/lib/Analysis/DependenceInfo.cpp b/polly/lib/Analysis/DependenceInfo.cpp
index 69257c603877ea..d58dc9917bc91f 100644
--- a/polly/lib/Analysis/DependenceInfo.cpp
+++ b/polly/lib/Analysis/DependenceInfo.cpp
@@ -950,8 +950,8 @@ class DependenceInfoPrinterLegacyPass final : public ScopPass {
   bool runOnScop(Scop &S) override {
     DependenceInfo &P = getAnalysis<DependenceInfo>();
 
-    OS << "Printing analysis '" << P.getPassName() << "' for " << "region: '"
-       << S.getRegion().getNameStr() << "' in function '"
+    OS << "Printing analysis '" << P.getPassName() << "' for "
+       << "region: '" << S.getRegion().getNameStr() << "' in function '"
        << S.getFunction().getName() << "':\n";
     P.printScop(OS, S);
 
diff --git a/polly/lib/Analysis/ScopBuilder.cpp b/polly/lib/Analysis/ScopBuilder.cpp
index c62cb2a85c835c..64314d6041b8e9 100644
--- a/polly/lib/Analysis/ScopBuilder.cpp
+++ b/polly/lib/Analysis/ScopBuilder.cpp
@@ -2689,9 +2689,10 @@ void ScopBuilder::addUserContext() {
     if (NameContext != NameUserContext) {
       std::string SpaceStr = stringFromIslObj(Space, "null");
       errs() << "Error: the name of dimension " << i
-             << " provided in -polly-context " << "is '" << NameUserContext
-             << "', but the name in the computed " << "context is '"
-             << NameContext << "'. Due to this name mismatch, "
+             << " provided in -polly-context "
+             << "is '" << NameUserContext << "', but the name in the computed "
+             << "context is '" << NameContext
+             << "'. Due to this name mismatch, "
              << "the -polly-context option is ignored. Please provide "
              << "the context in the parameter space: " << SpaceStr << ".\n";
       return;

[tstellar]

@owenca Can you rebase this branch?

[owenca]

@owenca Can you rebase this branch?

@tstellar I've rebased it.

[owenca]

@tstellar below is the release notes for clang-format 18.1.5.

• Restores clang-format behavior that always breaks before a stream insertion operator (<<) when both operands are string literals.
• Fixes clang-format regressions in annotating initialization list braces and trailing return type arrow, and breaking after the block comment before a function argument.