1 files changed, 8 insertions, 1 deletions
diff --git a/test/pp.c b/test/pp.c
index 0aa5287..7c34542 100644
--- a/test/pp.c
+++ b/test/pp.c
@@ -8,6 +8,11 @@
 #define CATr(a) foo##a
 #define CAT(a,b) a##b
 
+#define hash_hash # ## #
+#define mkstr(a) # a
+#define in_between(a) mkstr(a)
+#define join(c, d) in_between(c hash_hash d)
+char p[] = join(x, y); // equivalent to   char p[] = "x ## y";
 
 int
 main(void)
@@ -20,5 +25,7 @@ main(void)
             05.5), STR(ADD(1,2)));
    hi(ADD(Foo, SQR(Bar+1)));
    int foo123 = 77;
-   printf("%s %s %g\n", str(Foo,5), xstr(Foo), CAT(1.5,e3f) + CAT(7,)-CAT(1,));
+   printf("%s %s %g\n", str(Foo,5), xstr(Foo), CAT(1.5,e3f) + CAT(7,)-CAT(,1));
+   printf("join: \"%s\"\n", p);
+   CAT(ret,urn) 0;
 }