Index: clang/docs/ClangFormatStyleOptions.rst
===================================================================
--- clang/docs/ClangFormatStyleOptions.rst
+++ clang/docs/ClangFormatStyleOptions.rst
@@ -3549,6 +3549,19 @@
 
   For example: Q_UNUSED
 
+  Cases in switch block can be defined as StatementMacros. The behavior is
+  the same as 'case' in switch block.
+
+  .. code-block:: c
+    switch (x) {
+    FOO:
+      break;
+    case 0:
+      break;
+    BAR(var):
+      break;
+    }
+
 **TabWidth** (``unsigned``)
   The number of columns used for tab stops.
 
Index: clang/lib/Format/UnwrappedLineParser.cpp
===================================================================
--- clang/lib/Format/UnwrappedLineParser.cpp
+++ clang/lib/Format/UnwrappedLineParser.cpp
@@ -2920,6 +2920,8 @@
   nextToken();
   if (FormatTok->is(tok::l_paren))
     parseParens();
+  if (FormatTok->is(tok::colon))
+    parseLabel();
   if (FormatTok->is(tok::semi))
     nextToken();
   addUnwrappedLine();
Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -3496,6 +3496,33 @@
                getLLVMStyleWithColumns(11));
 }
 
+TEST_F(FormatTest, StatementMacroInSwitchBlock) {
+  FormatStyle Style = getLLVMStyle();
+  Style.StatementMacros.push_back("FOO");
+  Style.SpaceBeforeCtorInitializerColon = false;
+  EXPECT_EQ("switch (x) {\n"
+            "FOO:\n"
+            "  break;\n"
+            "case 0:\n"
+            "  break;\n"
+            "FOO(var):\n"
+            "  break;\n"
+            "case 1:\n"
+            "  break;\n"
+            "}",
+            format("switch (x) {\n"
+                   "FOO:\n"
+                   "  break;\n"
+                   "case 0:\n"
+                   "  break;\n"
+                   "FOO(var):\n"
+                   "  break;\n"
+                   "case 1:\n"
+                   "  break;\n"
+                   "}",
+                   Style));
+}
+
 TEST_F(FormatTest, IndentPreprocessorDirectives) {
   FormatStyle Style = getLLVMStyle();
   Style.IndentPPDirectives = FormatStyle::PPDIS_None;