Fix crash for incomplete labels in macros.

Still the formatting can be improved, but at least we don't assert any
more. This happened when trying to format lib/Sema/SemaType.cpp.

llvm-svn: 175003

2 files changed, 8 insertions, 2 deletions

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 922671600d2..28522a3e327 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -565,8 +565,8 @@ void UnwrappedLineParser::parseDoWhile() {
 }
 
 void UnwrappedLineParser::parseLabel() {
-  // FIXME: remove all asserts.
-  assert(FormatTok.Tok.is(tok::colon) && "':' expected");
+  if (FormatTok.Tok.isNot(tok::colon))
+    return;
   nextToken();
   unsigned OldLineLevel = Line->Level;
   if (Line->Level > 0)
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
index f1cef2a03d1..f28bc884445 100644
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -353,6 +353,12 @@ TEST_F(FormatTest, FormatsSwitchStatement) {
                "}");
   verifyFormat("switch (test)\n"
                "  ;");
+  
+  // FIXME: Improve formatting of case labels in macros.
+  verifyFormat("#define SOMECASES  \\\n"
+               "case 1:            \\\n"
+               "  case 2\n", getLLVMStyleWithColumns(20));
+
   verifyGoogleFormat("switch (x) {\n"
                      "  case 1:\n"
                      "    f();\n"