[clang-format] Add BreakAdjacentStringLiterals option (#73432)

Closes #70451.

2 files changed, 15 insertions, 0 deletions

diff --git a/clang/unittests/Format/ConfigParseTest.cpp b/clang/unittests/Format/ConfigParseTest.cpp
index 3a6667d..0c9f68f 100644
--- a/clang/unittests/Format/ConfigParseTest.cpp
+++ b/clang/unittests/Format/ConfigParseTest.cpp
@@ -159,6 +159,7 @@ TEST(ConfigParseTest, ParsesConfigurationBools) {
   CHECK_PARSE_BOOL(AllowShortLoopsOnASingleLine);
   CHECK_PARSE_BOOL(BinPackArguments);
   CHECK_PARSE_BOOL(BinPackParameters);
+  CHECK_PARSE_BOOL(BreakAdjacentStringLiterals);
   CHECK_PARSE_BOOL(BreakAfterJavaFieldAnnotations);
   CHECK_PARSE_BOOL(BreakBeforeTernaryOperators);
   CHECK_PARSE_BOOL(BreakStringLiterals);
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index d095a2b..420afe5 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -26644,6 +26644,20 @@ TEST_F(FormatTest, StreamOutputOperator) {
   verifyFormat("std::cout << \"foo\" << \"bar\" << baz;");
 }
 
+TEST_F(FormatTest, BreakAdjacentStringLiterals) {
+  constexpr StringRef Code{
+      "return \"Code\" \"\\0\\52\\26\\55\\55\\0\" \"x013\" \"\\02\\xBA\";"};
+
+  verifyFormat("return \"Code\"\n"
+               "       \"\\0\\52\\26\\55\\55\\0\"\n"
+               "       \"x013\"\n"
+               "       \"\\02\\xBA\";",
+               Code);
+
+  auto Style = getLLVMStyle();
+  Style.BreakAdjacentStringLiterals = false;
+  verifyFormat(Code, Style);
+}
 } // namespace
 } // namespace test
 } // namespace format