Comment parsing: support the "\invariant" command.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163905 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/warn-documentation.cpp b/test/Sema/warn-documentation.cpp
index a18a0a4..2c8207b 100644
--- a/test/Sema/warn-documentation.cpp
+++ b/test/Sema/warn-documentation.cpp
@@ -384,6 +384,14 @@
 void test_deprecated_2(int a);
 
 
+/// \invariant aaa
+void test_invariant_1(int a);
+
+// expected-warning@+1 {{empty paragraph passed to '\invariant' command}}
+/// \invariant
+void test_invariant_2(int a);
+
+
 // no-warning
 /// \returns Aaa
 int test_returns_right_decl_1(int);