Add compat func for clear

common/clear.go

@@ -0,0 +1,11 @@
+//go:build go1.21
+
+package common
+
+func ClearArray[T ~[]E, E any](t T) {
+	clear(t)
+}
+
+func ClearMap[T ~map[K]V, K comparable, V any](t T) {
+	clear(t)
+}

common/clear_compat.go

@@ -0,0 +1,16 @@
+//go:build !go1.21
+
+package common
+
+func ClearArray[T ~[]E, E any](t T) {
+	var defaultValue E
+	for i := range t {
+		t[i] = defaultValue
+	}
+}
+
+func ClearMap[T ~map[K]V, K comparable, V any](t T) {
+	for k := range t {
+		delete(t, k)
+	}
+}