created first and rest macroses to operate va_args

aodinokov · Sep 14, 2024 · 326ea67 · 326ea67
1 parent 2c08a55
commit 326ea67
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diff --git a/examples/c_print_args_alt/mr.h b/examples/c_print_args_alt/mr.h
@@ -17,7 +17,11 @@
 
 /* Interface macros for unrolled loops from mr_pp.h */
 #define MR_FOREACH(X, ...) MR_PASTE2 (MR_FOREACH, MR_NARG (__VA_ARGS__)) (X, __VA_ARGS__)
-#define MR_FOREACH_EX(X, ...) MR_PASTE2 (MR_FOREACH_EX_, MR_NARG (__VA_ARGS__)) (X, __VA_ARGS__)
 #define MR_FOR(NAME, N, OP, FUNC, ...) MR_PASTE2 (MR_FOR, N) (NAME, OP, FUNC, __VA_ARGS__)
 
+// like car/cdr in lisp
+#define MR_FIRST(_FIRST_, ...) _FIRST_
+#define MR_REST(_FIRST_, ...) __VA_ARGS__
+#define MR_FOREACH_EX(X, ...) MR_PASTE2 (MR_FOREACH_EX_, MR_NARG (__VA_ARGS__)) (X, __VA_ARGS__)
+
 #endif