typecase

(typecase x (integer body...) (string body...) (t default...))

Evaluates x once and selects the first clause whose type specifier x satisfies, evaluating that clause's body and returning its last value. The supported type names are integer, float, number, rational, string, symbol, keyword, cons, list, null, atom, character, hash-table, and boolean, plus a final t/otherwise default clause. Compound specifiers also work: (or ...), (and ...), (not ...), (member item...), (eql object), (satisfies function), and ranged numeric types like (integer 0 9) (see check-type for the details). If no clause matches and there is no default, typecase returns nil.