Add test where a macro formal parameter is the same as an existing macro.

This is a well-defined condition, but something that currently trips up
the implementation. Should be easy to fix.

diff --git a/tests/018-define-func-macro-as-parameter.c b/tests/018-define-func-macro-as-parameter.c
new file mode 100644 (file)
index 0000000..668130b
--- /dev/null
+++ b/tests/018-define-func-macro-as-parameter.c
@@ -0,0 +1,3 @@
+#define x 0
+#define foo(x) x
+foo(1)