Initial commit

main/util.h

@@ -0,0 +1,30 @@
+#pragma once
+
+// clang-format off
+#define FOR_PACK(PACK_TYPE, PACK_NAME, VAR, CODE) \
+{                                                 \
+    [[maybe_unused]] int dummy[] {                \
+        (                                         \
+            [&](PACK_TYPE VAR) {                  \
+                CODE;                             \
+                return 0;                         \
+            }                                     \
+        )(PACK_NAME)...                           \
+    };                                            \
+}
+// clang-format on
+
+// clang-format off
+#define FOR_PACK_S(PACK_TYPE, VAR_TYPE, CODE) \
+{                                             \
+    [[maybe_unused]] int dummy[] {            \
+        (                                     \
+            [&]() {                           \
+                using VAR_TYPE = PACK_TYPE;   \
+                CODE;                         \
+                return 0;                     \
+            }                                 \
+        )()...                                \
+    };                                        \
+}
+// clang-format on