test: add example that leads preprocessor to a dead loop

Signed-off-by: Efimov Vasily <real@ispras.ru>

1 files changed, 15 insertions, 0 deletions

diff --git a/test/testcpp.py b/test/testcpp.py
index 51508c4..dba536e 100644
--- a/test/testcpp.py
+++ b/test/testcpp.py
@@ -68,4 +68,19 @@ _k_
 _qs_"""
         )
 
+    def test_deadloop_macro(self):
+        # If there is a word which equals to name of a parametrized macro, then
+        # attempt to expand such word as a macro manages the parser to fall
+        # into an infinite loop.
+
+        self.__test_preprocessing("""\
+#define a(x) x
+
+a;"""
+            , """\
+
+
+a;"""
+        )
+
 main()