[clang-format] broken after lambda with return type template with boolean literal

Summary:
A Lamdba with a return type template with a boolean literal (true,false) behaves differently to an integer literal

https://bugs.llvm.org/show_bug.cgi?id=40910

Reviewers: klimek, djasper, JonasToth, alexfh, krasimir, jkorous

Reviewed By: jkorous

Subscribers: jkorous, cfe-commits

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D58922

llvm-svn: 355450

2 files changed, 17 insertions, 0 deletions

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 4bc624db7dd..de7e646b17c 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1442,6 +1442,8 @@ bool UnwrappedLineParser::tryToParseLambda() {
     case tok::lessequal:
     case tok::question:
     case tok::colon:
+    case tok::kw_true:
+    case tok::kw_false:
       nextToken();
       break;
     case tok::arrow:
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index 094db349ae1..650636b7633 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -11936,6 +11936,21 @@ TEST_F(FormatTest, FormatsLambdas) {
               "// broken:\n"
               "auto foo{[]() -> foo<2 ? 1 : 0> { return {}; }};\n"
               "} // namespace bar");
+  verifyFormat("[]() -> a<1> {};");
+  verifyFormat("[]() -> a<1> { ; };");
+  verifyFormat("[]() -> a<1> { ; }();");
+  verifyFormat("[a, a]() -> a<true> {};");
+  verifyFormat("[]() -> a<true> {};");
+  verifyFormat("[]() -> a<true> { ; };");
+  verifyFormat("[]() -> a<true> { ; }();");
+  verifyFormat("[a, a]() -> a<false> {};");
+  verifyFormat("[]() -> a<false> {};");
+  verifyFormat("[]() -> a<false> { ; };");
+  verifyFormat("[]() -> a<false> { ; }();");
+  verifyFormat("auto foo{[]() -> foo<false> { ; }};");
+  verifyFormat("namespace bar {\n"
+               "auto foo{[]() -> foo<false> { ; }};\n"
+               "} // namespace bar");
   verifyFormat("auto aaaaaaaa = [](int i, // break for some reason\n"
                "                   int j) -> int {\n"
                "  return ffffffffffffffffffffffffffffffffffffffffffff(i * j);\n"