has_args()

Asserts there are exactly n ($1) arguments ($@).

min_args()

Asserts there are at least n ($1) arguments ($@).

max_args()

Asserts there are at most n ($1) arguments ($@).

min_max_args()

Asserts there are at least n ($1) and at most m ($2) arguments ($@).

arg_quote()

Quotes a single argument ($1).

handle existing quotes