Add generic and generic structs

go-demo-4/output/errors.go

@@ -14,3 +14,13 @@ func PrintError(value any) {
 		color.Red("Неизвестный тип ошибки")
 	}
 }
+
+// Generic
+func Sum[T int | float32 | float64 | string](a, b T) T {
+	return a + b
+}
+
+// Generic structs
+type List[T any] struct {
+	elements []T
+}