# typesof proc

Source: https://ref.dm-lang.org/proc/typesof

### Format
> `typesof(Type1,Type2,...)`

### Returns
> A list of all types that are derived from the specified "base" types, including the base types themselves.

### Args
> The "base" types.

```dm /typesof/
obj/fruit
  apple
  peach
  mango
var/list/fruit_types = typesof(/obj/fruit)
```

In this example, fruit_types is initialized to contain /obj/fruit, /obj/fruit/apple, /obj/fruit/peach, and /obj/fruit/mango.

This procedure can also be used to list procs and verbs.

```dm /typesof/
mob/admin_commands/verb
   shutdown_world()
      world.Del()
   reboot_world()
      world.Reboot()

//for testing
mob/verb/add_admin()
   verbs += typesof(/mob/admin_commands/verb)
mob/verb/remove_admin()
   verbs -= typesof(/mob/admin_commands/verb)
```

### See also
- [istype proc](https://ref.dm-lang.org/proc/istype.md)
- [locate proc](https://ref.dm-lang.org/proc/locate.md)