testing out macro magic to support positional, and keyword arguments with arbitrary default values

test_macro_magic.c

@@ -0,0 +1,20 @@
+#include <criterion/criterion.h>
+
+enum animal {
+    dog,
+    cat,
+};
+
+typedef struct args {
+    enum animal animal;
+} args_t;
+
+#define ARGS_DEFAULT .animal=cat
+#define ARGS(...) ((args_t){ ARGS_DEFAULT, __VA_ARGS__ })
+
+Test(macro_magic, default_values) {
+    args_t a1 = ARGS();
+    args_t a2 = ARGS(.animal=dog);
+    cr_assert_eq(a1.animal, cat);
+    cr_assert_eq(a2.animal, dog);
+}